Add Fps class

Add a class to wrap a fps value. This is useful because across
the code we
 - convert between vsyncPeriod and fps
 - compare with tolerance (this ensures we use consistent tolerance)
 - consistent toString method

Bug: 159590486
Test: presubmit
Change-Id: Iebb77a33a2f822056642aa61bd6fac6514aa656d
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 871222c..a00e959 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -44,6 +44,7 @@
         "DisplayDevice_GetBestColorModeTest.cpp",
         "DisplayDevice_SetProjectionTest.cpp",
         "EventThreadTest.cpp",
+        "FpsTest.cpp",
         "FrameTimelineTest.cpp",
         "HWComposerTest.cpp",
         "OneShotTimerTest.cpp",
diff --git a/services/surfaceflinger/tests/unittests/FakeVsyncConfiguration.h b/services/surfaceflinger/tests/unittests/FakeVsyncConfiguration.h
index 4cd1e0a..36e24d2 100644
--- a/services/surfaceflinger/tests/unittests/FakeVsyncConfiguration.h
+++ b/services/surfaceflinger/tests/unittests/FakeVsyncConfiguration.h
@@ -26,7 +26,7 @@
     static constexpr nsecs_t FAKE_PHASE_OFFSET_NS = 0;
     static constexpr auto FAKE_DURATION_OFFSET_NS = std::chrono::nanoseconds(0);
 
-    VsyncConfigSet getConfigsForRefreshRate(float) const override { return getCurrentConfigs(); }
+    VsyncConfigSet getConfigsForRefreshRate(Fps) const override { return getCurrentConfigs(); }
 
     VsyncConfigSet getCurrentConfigs() const override {
         return {{FAKE_PHASE_OFFSET_NS, FAKE_PHASE_OFFSET_NS, FAKE_DURATION_OFFSET_NS,
@@ -37,7 +37,7 @@
                  FAKE_DURATION_OFFSET_NS}};
     }
 
-    void setRefreshRateFps(float) override {}
+    void setRefreshRateFps(Fps) override {}
     void dump(std::string&) const override {}
 };
 
diff --git a/services/surfaceflinger/tests/unittests/FpsTest.cpp b/services/surfaceflinger/tests/unittests/FpsTest.cpp
new file mode 100644
index 0000000..db732cf
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/FpsTest.cpp
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Fps.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace android {
+
+TEST(FpsTest, construct) {
+    Fps fpsDefault;
+    EXPECT_FALSE(fpsDefault.isValid());
+
+    Fps fps1(60.0f);
+    EXPECT_TRUE(fps1.isValid());
+    Fps fps2 = Fps::fromPeriodNsecs(static_cast<nsecs_t>(1e9f / 60.0f));
+    EXPECT_TRUE(fps2.isValid());
+    EXPECT_TRUE(fps1.equalsWithMargin(fps2));
+}
+
+TEST(FpsTest, compare) {
+    constexpr float kEpsilon = 1e-4f;
+    const Fps::EqualsInBuckets equalsInBuckets;
+    const Fps::EqualsWithMargin equalsWithMargin;
+
+    EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f)));
+    EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f - kEpsilon)));
+    EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f + kEpsilon)));
+
+    EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f)));
+    EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f - kEpsilon)));
+    EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f + kEpsilon)));
+
+    EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f)));
+    EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f - kEpsilon)));
+    EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f + kEpsilon)));
+
+    EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f + kEpsilon)));
+    EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f)));
+    EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f - kEpsilon)));
+
+    EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f + kEpsilon)));
+    EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f)));
+    EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f - kEpsilon)));
+
+    // Fps with difference of 1 should be different
+    EXPECT_FALSE(Fps(60.0f).equalsWithMargin(Fps(61.f)));
+    EXPECT_TRUE(Fps(60.0f).lessThanWithMargin(Fps(61.f)));
+    EXPECT_TRUE(Fps(60.0f).greaterThanWithMargin(Fps(59.f)));
+
+    // These are common refresh rates which should be different.
+    EXPECT_FALSE(Fps(60.0f).equalsWithMargin(Fps(59.94f)));
+    EXPECT_TRUE(Fps(60.0f).greaterThanWithMargin(Fps(59.94f)));
+    EXPECT_FALSE(equalsInBuckets(Fps(60.0f), Fps(59.94f)));
+    EXPECT_FALSE(equalsWithMargin(Fps(60.0f), Fps(59.94f)));
+    EXPECT_NE(std::hash<Fps>()(Fps(60.0f)), std::hash<Fps>()(Fps(59.94f)));
+
+    EXPECT_FALSE(Fps(30.0f).equalsWithMargin(Fps(29.97f)));
+    EXPECT_TRUE(Fps(30.0f).greaterThanWithMargin(Fps(29.97f)));
+    EXPECT_FALSE(equalsInBuckets(Fps(30.0f), Fps(29.97f)));
+    EXPECT_FALSE(equalsWithMargin(Fps(30.0f), Fps(29.97f)));
+    EXPECT_NE(std::hash<Fps>()(Fps(30.0f)), std::hash<Fps>()(Fps(29.97f)));
+}
+
+TEST(FpsTest, getIntValue) {
+    EXPECT_EQ(30, Fps(30.1f).getIntValue());
+    EXPECT_EQ(31, Fps(30.9f).getIntValue());
+    EXPECT_EQ(31, Fps(30.5f).getIntValue());
+}
+
+TEST(FpsTest, equalsInBucketsImpliesEqualHashes) {
+    constexpr float kStep = 1e-4f;
+    const Fps::EqualsInBuckets equals;
+    for (float fps = 30.0f; fps < 31.0f; fps += kStep) {
+        const Fps left(fps);
+        const Fps right(fps + kStep);
+        if (equals(left, right)) {
+            ASSERT_EQ(std::hash<Fps>()(left), std::hash<Fps>()(right))
+                    << "left= " << left << " right=" << right;
+        }
+    }
+}
+
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
index fbb4637..cbc1e02 100644
--- a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
@@ -32,7 +32,9 @@
 using testing::_;
 using testing::Return;
 
-namespace android::scheduler {
+namespace android {
+
+namespace scheduler {
 
 class LayerHistoryTest : public testing::Test {
 protected:
@@ -43,11 +45,11 @@
     static constexpr auto REFRESH_RATE_AVERAGE_HISTORY_DURATION =
             LayerInfo::RefreshRateHistory::HISTORY_DURATION;
 
-    static constexpr float LO_FPS = 30.f;
-    static constexpr auto LO_FPS_PERIOD = static_cast<nsecs_t>(1e9f / LO_FPS);
+    static constexpr Fps LO_FPS{30.f};
+    static constexpr auto LO_FPS_PERIOD = LO_FPS.getPeriodNsecs();
 
-    static constexpr float HI_FPS = 90.f;
-    static constexpr auto HI_FPS_PERIOD = static_cast<nsecs_t>(1e9f / HI_FPS);
+    static constexpr Fps HI_FPS{90.f};
+    static constexpr auto HI_FPS_PERIOD = HI_FPS.getPeriodNsecs();
 
     LayerHistoryTest() { mFlinger.resetScheduler(mScheduler); }
 
@@ -88,20 +90,19 @@
         return sp<mock::MockLayer>(new mock::MockLayer(mFlinger.flinger(), std::move(name)));
     }
 
-    void recordFramesAndExpect(const sp<mock::MockLayer>& layer, nsecs_t& time, float frameRate,
-                               float desiredRefreshRate, int numFrames) {
-        const nsecs_t framePeriod = static_cast<nsecs_t>(1e9f / frameRate);
+    void recordFramesAndExpect(const sp<mock::MockLayer>& layer, nsecs_t& time, Fps frameRate,
+                               Fps desiredRefreshRate, int numFrames) {
         LayerHistory::Summary summary;
         for (int i = 0; i < numFrames; i++) {
             history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
-            time += framePeriod;
+            time += frameRate.getPeriodNsecs();
 
             summary = history().summarize(time);
         }
 
         ASSERT_EQ(1, summary.size());
         ASSERT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-        ASSERT_FLOAT_EQ(desiredRefreshRate, summary[0].desiredRefreshRate)
+        ASSERT_TRUE(desiredRefreshRate.equalsWithMargin(summary[0].desiredRefreshRate))
                 << "Frame rate is " << frameRate;
     }
 
@@ -196,7 +197,7 @@
 
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 }
@@ -289,7 +290,7 @@
     EXPECT_CALL(*layer, isVisible()).WillRepeatedly(Return(true));
     EXPECT_CALL(*layer, getFrameRateForLayerTree())
             .WillRepeatedly(
-                    Return(Layer::FrameRate(73.4f, Layer::FrameRateCompatibility::Default)));
+                    Return(Layer::FrameRate(Fps(73.4f), Layer::FrameRateCompatibility::Default)));
 
     EXPECT_EQ(1, layerCount());
     EXPECT_EQ(0, activeLayerCount());
@@ -302,7 +303,7 @@
 
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitDefault, history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(Fps(73.4f).equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
@@ -311,7 +312,7 @@
     time += MAX_ACTIVE_LAYER_PERIOD_NS.count();
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitDefault, history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(Fps(73.4f).equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(0, frequentLayerCount(time));
 }
@@ -321,7 +322,7 @@
     EXPECT_CALL(*layer, isVisible()).WillRepeatedly(Return(true));
     EXPECT_CALL(*layer, getFrameRateForLayerTree())
             .WillRepeatedly(Return(
-                    Layer::FrameRate(73.4f, Layer::FrameRateCompatibility::ExactOrMultiple)));
+                    Layer::FrameRate(Fps(73.4f), Layer::FrameRateCompatibility::ExactOrMultiple)));
 
     EXPECT_EQ(1, layerCount());
     EXPECT_EQ(0, activeLayerCount());
@@ -335,7 +336,7 @@
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitExactOrMultiple,
               history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(Fps(73.4f).equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
@@ -345,7 +346,7 @@
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitExactOrMultiple,
               history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(Fps(73.4f).equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(0, frequentLayerCount(time));
 }
@@ -397,7 +398,8 @@
     ASSERT_EQ(2, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Min, summary[0].vote);
     ASSERT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[1].vote);
-    EXPECT_FLOAT_EQ(HI_FPS, history().summarize(time)[1].desiredRefreshRate);
+    EXPECT_TRUE(HI_FPS.equalsWithMargin(history().summarize(time)[1].desiredRefreshRate));
+
     EXPECT_EQ(2, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
@@ -411,7 +413,7 @@
 
     ASSERT_EQ(1, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
@@ -430,7 +432,7 @@
 
     ASSERT_EQ(2, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(LayerHistory::LayerVoteType::Max, summary[1].vote);
     EXPECT_EQ(2, activeLayerCount());
     EXPECT_EQ(2, frequentLayerCount(time));
@@ -440,9 +442,9 @@
     summary = history().summarize(time);
     ASSERT_EQ(2, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[1].vote);
-    EXPECT_FLOAT_EQ(HI_FPS, summary[1].desiredRefreshRate);
+    EXPECT_TRUE(HI_FPS.equalsWithMargin(summary[1].desiredRefreshRate));
     EXPECT_EQ(2, activeLayerCount());
     EXPECT_EQ(2, frequentLayerCount(time));
 
@@ -452,9 +454,9 @@
     ASSERT_EQ(2, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[1].vote);
-    EXPECT_FLOAT_EQ(HI_FPS, summary[1].desiredRefreshRate);
+    EXPECT_TRUE(HI_FPS.equalsWithMargin(summary[1].desiredRefreshRate));
     EXPECT_EQ(2, layerCount());
     EXPECT_EQ(2, activeLayerCount());
     EXPECT_EQ(2, frequentLayerCount(time));
@@ -469,7 +471,7 @@
 
     ASSERT_EQ(1, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(LO_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(LO_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
@@ -490,7 +492,7 @@
 
     ASSERT_EQ(1, summary.size());
     EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summary[0].vote);
-    EXPECT_FLOAT_EQ(HI_FPS, summary[0].desiredRefreshRate);
+    EXPECT_TRUE(HI_FPS.equalsWithMargin(summary[0].desiredRefreshRate));
     EXPECT_EQ(1, layerCount());
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
@@ -567,12 +569,12 @@
     EXPECT_CALL(*explicitVisiblelayer, isVisible()).WillRepeatedly(Return(true));
     EXPECT_CALL(*explicitVisiblelayer, getFrameRateForLayerTree())
             .WillRepeatedly(Return(
-                    Layer::FrameRate(60.0f, Layer::FrameRateCompatibility::ExactOrMultiple)));
+                    Layer::FrameRate(Fps(60.0f), Layer::FrameRateCompatibility::ExactOrMultiple)));
 
     EXPECT_CALL(*explicitInvisiblelayer, isVisible()).WillRepeatedly(Return(false));
     EXPECT_CALL(*explicitInvisiblelayer, getFrameRateForLayerTree())
             .WillRepeatedly(Return(
-                    Layer::FrameRate(90.0f, Layer::FrameRateCompatibility::ExactOrMultiple)));
+                    Layer::FrameRate(Fps(90.0f), Layer::FrameRateCompatibility::ExactOrMultiple)));
 
     nsecs_t time = systemTime();
 
@@ -585,7 +587,7 @@
     ASSERT_EQ(1, history().summarize(time).size());
     EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitExactOrMultiple,
               history().summarize(time)[0].vote);
-    EXPECT_FLOAT_EQ(60.0f, history().summarize(time)[0].desiredRefreshRate);
+    EXPECT_TRUE(Fps(60.0f).equalsWithMargin(history().summarize(time)[0].desiredRefreshRate));
     EXPECT_EQ(2, activeLayerCount());
     EXPECT_EQ(2, frequentLayerCount(time));
 }
@@ -643,7 +645,7 @@
 
     nsecs_t time = systemTime();
     for (float fps = 54.0f; fps < 65.0f; fps += 0.1f) {
-        recordFramesAndExpect(layer, time, fps, 60.0f, PRESENT_TIME_HISTORY_SIZE);
+        recordFramesAndExpect(layer, time, Fps(fps), Fps(60.0f), PRESENT_TIME_HISTORY_SIZE);
     }
 }
 
@@ -653,13 +655,13 @@
     EXPECT_CALL(*layer, getFrameRateForLayerTree()).WillRepeatedly(Return(Layer::FrameRate()));
 
     nsecs_t time = systemTime();
-    recordFramesAndExpect(layer, time, 60.0f, 60.0f, PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(60.0f), Fps(60.0f), PRESENT_TIME_HISTORY_SIZE);
 
-    recordFramesAndExpect(layer, time, 60.0f, 60.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 30.0f, 60.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 30.0f, 30.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 60.0f, 30.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 60.0f, 60.0f, PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(60.0f), Fps(60.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(30.0f), Fps(60.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(30.0f), Fps(30.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(60.0f), Fps(30.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(60.0f), Fps(60.0f), PRESENT_TIME_HISTORY_SIZE);
 }
 
 TEST_F(LayerHistoryTest, heuristicLayerNotOscillating) {
@@ -669,11 +671,11 @@
 
     nsecs_t time = systemTime();
 
-    recordFramesAndExpect(layer, time, 27.10f, 30.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 26.90f, 30.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 26.00f, 24.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 26.90f, 24.0f, PRESENT_TIME_HISTORY_SIZE);
-    recordFramesAndExpect(layer, time, 27.10f, 30.0f, PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(27.10f), Fps(30.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(26.90f), Fps(30.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(26.00f), Fps(24.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(26.90f), Fps(24.0f), PRESENT_TIME_HISTORY_SIZE);
+    recordFramesAndExpect(layer, time, Fps(27.10f), Fps(30.0f), PRESENT_TIME_HISTORY_SIZE);
 }
 
 class LayerHistoryTestParameterized : public LayerHistoryTest,
@@ -724,7 +726,7 @@
 
             bool max = false;
             bool min = false;
-            float heuristic = 0;
+            Fps heuristic{0.0};
             for (const auto& layer : history().summarize(time)) {
                 if (layer.vote == LayerHistory::LayerVoteType::Heuristic) {
                     heuristic = layer.desiredRefreshRate;
@@ -736,7 +738,7 @@
             }
 
             if (infrequentLayerUpdates > FREQUENT_LAYER_WINDOW_SIZE) {
-                EXPECT_FLOAT_EQ(24.0f, heuristic);
+                EXPECT_TRUE(Fps(24.0f).equalsWithMargin(heuristic));
                 EXPECT_FALSE(max);
                 if (history().summarize(time).size() == 2) {
                     EXPECT_TRUE(min);
@@ -750,4 +752,5 @@
                         ::testing::Values(1s, 2s, 3s, 4s, 5s));
 
 } // namespace
-} // namespace android::scheduler
+} // namespace scheduler
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
index f2b7191..83ad737 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
@@ -30,6 +30,7 @@
 using testing::_;
 
 namespace android {
+
 namespace scheduler {
 
 namespace hal = android::hardware::graphics::composer::hal;
@@ -43,11 +44,11 @@
     RefreshRateConfigsTest();
     ~RefreshRateConfigsTest();
 
-    float findClosestKnownFrameRate(const RefreshRateConfigs& refreshRateConfigs, float frameRate) {
+    Fps findClosestKnownFrameRate(const RefreshRateConfigs& refreshRateConfigs, Fps frameRate) {
         return refreshRateConfigs.findClosestKnownFrameRate(frameRate);
     }
 
-    std::vector<float> getKnownFrameRate(const RefreshRateConfigs& refreshRateConfigs) {
+    std::vector<Fps> getKnownFrameRate(const RefreshRateConfigs& refreshRateConfigs) {
         return refreshRateConfigs.mKnownFrameRates;
     }
 
@@ -62,29 +63,29 @@
 
     // Test configs
     std::shared_ptr<const HWC2::Display::Config> mConfig60 =
-            createConfig(HWC_CONFIG_ID_60, 0, static_cast<int64_t>(1e9f / 60));
+            createConfig(HWC_CONFIG_ID_60, 0, Fps(60.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig90 =
-            createConfig(HWC_CONFIG_ID_90, 0, static_cast<int64_t>(1e9f / 90));
+            createConfig(HWC_CONFIG_ID_90, 0, Fps(90.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig90DifferentGroup =
-            createConfig(HWC_CONFIG_ID_90, 1, static_cast<int64_t>(1e9f / 90));
+            createConfig(HWC_CONFIG_ID_90, 1, Fps(90.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig90DifferentResolution =
-            createConfig(HWC_CONFIG_ID_90, 0, static_cast<int64_t>(1e9f / 90), 111, 222);
+            createConfig(HWC_CONFIG_ID_90, 0, Fps(90.0f).getPeriodNsecs(), 111, 222);
     std::shared_ptr<const HWC2::Display::Config> mConfig72 =
-            createConfig(HWC_CONFIG_ID_72, 0, static_cast<int64_t>(1e9f / 72));
+            createConfig(HWC_CONFIG_ID_72, 0, Fps(72.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig72DifferentGroup =
-            createConfig(HWC_CONFIG_ID_72, 1, static_cast<int64_t>(1e9f / 72));
+            createConfig(HWC_CONFIG_ID_72, 1, Fps(72.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig120 =
-            createConfig(HWC_CONFIG_ID_120, 0, static_cast<int64_t>(1e9f / 120));
+            createConfig(HWC_CONFIG_ID_120, 0, Fps(120.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig120DifferentGroup =
-            createConfig(HWC_CONFIG_ID_120, 1, static_cast<int64_t>(1e9f / 120));
+            createConfig(HWC_CONFIG_ID_120, 1, Fps(120.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig30 =
-            createConfig(HWC_CONFIG_ID_30, 0, static_cast<int64_t>(1e9f / 30));
+            createConfig(HWC_CONFIG_ID_30, 0, Fps(30.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig30DifferentGroup =
-            createConfig(HWC_CONFIG_ID_30, 1, static_cast<int64_t>(1e9f / 30));
+            createConfig(HWC_CONFIG_ID_30, 1, Fps(30.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig25DifferentGroup =
-            createConfig(HWC_CONFIG_ID_25, 1, static_cast<int64_t>(1e9f / 25));
+            createConfig(HWC_CONFIG_ID_25, 1, Fps(25.0f).getPeriodNsecs());
     std::shared_ptr<const HWC2::Display::Config> mConfig50 =
-            createConfig(HWC_CONFIG_ID_50, 0, static_cast<int64_t>(1e9f / 50));
+            createConfig(HWC_CONFIG_ID_50, 0, Fps(50.0f).getPeriodNsecs());
 
     // Test device configurations
     // The positions of the configs in the arrays below MUST match their IDs. For example,
@@ -124,23 +125,23 @@
              mConfig50};
 
     // Expected RefreshRate objects
-    RefreshRate mExpected60Config = {HWC_CONFIG_ID_60, mConfig60, "60fps", 60,
+    RefreshRate mExpected60Config = {HWC_CONFIG_ID_60, mConfig60, Fps(60),
                                      RefreshRate::ConstructorTag(0)};
     RefreshRate mExpectedAlmost60Config = {HWC_CONFIG_ID_60,
-                                           createConfig(HWC_CONFIG_ID_60, 0, 16666665), "60fps", 60,
+                                           createConfig(HWC_CONFIG_ID_60, 0, 16666665), Fps(60),
                                            RefreshRate::ConstructorTag(0)};
-    RefreshRate mExpected90Config = {HWC_CONFIG_ID_90, mConfig90, "90fps", 90,
+    RefreshRate mExpected90Config = {HWC_CONFIG_ID_90, mConfig90, Fps(90),
                                      RefreshRate::ConstructorTag(0)};
     RefreshRate mExpected90DifferentGroupConfig = {HWC_CONFIG_ID_90, mConfig90DifferentGroup,
-                                                   "90fps", 90, RefreshRate::ConstructorTag(0)};
+                                                   Fps(90), RefreshRate::ConstructorTag(0)};
     RefreshRate mExpected90DifferentResolutionConfig = {HWC_CONFIG_ID_90,
-                                                        mConfig90DifferentResolution, "90fps", 90,
+                                                        mConfig90DifferentResolution, Fps(90),
                                                         RefreshRate::ConstructorTag(0)};
-    RefreshRate mExpected72Config = {HWC_CONFIG_ID_72, mConfig72, "72fps", 72,
+    RefreshRate mExpected72Config = {HWC_CONFIG_ID_72, mConfig72, Fps(72.0f),
                                      RefreshRate::ConstructorTag(0)};
-    RefreshRate mExpected30Config = {HWC_CONFIG_ID_30, mConfig30, "30fps", 30,
+    RefreshRate mExpected30Config = {HWC_CONFIG_ID_30, mConfig30, Fps(30),
                                      RefreshRate::ConstructorTag(0)};
-    RefreshRate mExpected120Config = {HWC_CONFIG_ID_120, mConfig120, "120fps", 120,
+    RefreshRate mExpected120Config = {HWC_CONFIG_ID_120, mConfig120, Fps(120),
                                       RefreshRate::ConstructorTag(0)};
 
     Hwc2::mock::Display mDisplay;
@@ -192,8 +193,11 @@
     auto refreshRateConfigs =
             std::make_unique<RefreshRateConfigs>(m60OnlyConfigDevice,
                                                  /*currentConfigId=*/HWC_CONFIG_ID_60);
-    ASSERT_LT(refreshRateConfigs->setDisplayManagerPolicy({HwcConfigIndexType(10), {60, 60}}), 0);
-    ASSERT_LT(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {20, 40}}), 0);
+    ASSERT_LT(refreshRateConfigs->setDisplayManagerPolicy(
+                      {HwcConfigIndexType(10), {Fps(60), Fps(60)}}),
+              0);
+    ASSERT_LT(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(20), Fps(40)}}),
+              0);
 }
 
 TEST_F(RefreshRateConfigsTest, twoDeviceConfigs_storesFullRefreshRateMap) {
@@ -227,7 +231,8 @@
     ASSERT_EQ(mExpected60Config, minRate60);
     ASSERT_EQ(mExpected60Config, performanceRate60);
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {60, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {Fps(60), Fps(90)}}),
+              0);
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_90);
 
     const auto& minRate90 = refreshRateConfigs->getMinRefreshRateByPolicy();
@@ -252,7 +257,8 @@
     ASSERT_EQ(mExpected60Config, minRate60);
     ASSERT_EQ(mExpected60Config, performanceRate60);
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {60, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {Fps(60), Fps(90)}}),
+              0);
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_90);
 
     const auto& minRate90 = refreshRateConfigs->getMinRefreshRateByPolicy();
@@ -274,7 +280,8 @@
     ASSERT_EQ(mExpected60Config, minRate);
     ASSERT_EQ(mExpected90Config, performanceRate);
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {60, 60}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(60), Fps(60)}}),
+              0);
 
     auto& minRate60 = refreshRateConfigs->getMinRefreshRateByPolicy();
     auto& performanceRate60 = refreshRateConfigs->getMaxRefreshRateByPolicy();
@@ -297,7 +304,8 @@
         EXPECT_EQ(current.getConfigId(), HWC_CONFIG_ID_90);
     }
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {90, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {Fps(90), Fps(90)}}),
+              0);
     {
         auto& current = refreshRateConfigs->getCurrentRefreshRate();
         EXPECT_EQ(current.getConfigId(), HWC_CONFIG_ID_90);
@@ -315,7 +323,8 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {60, 60}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(60), Fps(60)}}),
+              0);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
@@ -338,34 +347,35 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     lr.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz Heuristic";
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     lr.name = "45Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     lr.name = "30Hz Heuristic";
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     lr.name = "24Hz Heuristic";
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr.name = "";
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {60, 60}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(60), Fps(60)}}),
+              0);
 
     lr.vote = LayerVoteType::Min;
     EXPECT_EQ(mExpected60Config,
@@ -375,28 +385,30 @@
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {90, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
+                      {HWC_CONFIG_ID_90, {Fps(90.0f), Fps(90.0f)}}),
+              0);
 
     lr.vote = LayerVoteType::Min;
     EXPECT_EQ(mExpected90Config,
@@ -406,28 +418,30 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {0, 120}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
+                      {HWC_CONFIG_ID_60, {Fps(0.0f), Fps(120.0f)}}),
+              0);
     lr.vote = LayerVoteType::Min;
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
@@ -436,24 +450,24 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
@@ -474,24 +488,24 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
@@ -506,23 +520,23 @@
     auto& lr1 = layers[0];
     auto& lr2 = layers[1];
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected120Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 48.0f;
+    lr2.desiredRefreshRate = Fps(48.0f);
     lr2.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 48.0f;
+    lr2.desiredRefreshRate = Fps(48.0f);
     lr2.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
@@ -538,82 +552,82 @@
     auto& lr1 = layers[0];
     auto& lr2 = layers[1];
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitDefault;
     lr1.name = "24Hz ExplicitDefault";
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.vote = LayerVoteType::Heuristic;
     lr2.name = "60Hz Heuristic";
     EXPECT_EQ(mExpected120Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr1.name = "24Hz ExplicitExactOrMultiple";
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.vote = LayerVoteType::Heuristic;
     lr2.name = "60Hz Heuristic";
     EXPECT_EQ(mExpected120Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr1.name = "24Hz ExplicitExactOrMultiple";
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.vote = LayerVoteType::ExplicitDefault;
     lr2.name = "60Hz ExplicitDefault";
     EXPECT_EQ(mExpected120Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr1.name = "24Hz ExplicitExactOrMultiple";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::Heuristic;
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr1.name = "24Hz ExplicitExactOrMultiple";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitDefault;
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitDefault;
     lr1.name = "24Hz ExplicitDefault";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::Heuristic;
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::Heuristic;
     lr1.name = "24Hz Heuristic";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitDefault;
     lr2.name = "90Hz ExplicitDefault";
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr1.name = "24Hz ExplicitExactOrMultiple";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitDefault;
     lr2.name = "90Hz ExplicitDefault";
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr1.desiredRefreshRate = 24.0f;
+    lr1.desiredRefreshRate = Fps(24.0f);
     lr1.vote = LayerVoteType::ExplicitDefault;
     lr1.name = "24Hz ExplicitDefault";
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr2.name = "90Hz ExplicitExactOrMultiple";
     EXPECT_EQ(mExpected90Config,
@@ -636,24 +650,24 @@
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     EXPECT_EQ(mExpected30Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
@@ -676,41 +690,41 @@
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.vote = LayerVoteType::Heuristic;
     lr.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz Heuristic";
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
-    lr.desiredRefreshRate = 45.0f;
+    lr.desiredRefreshRate = Fps(45.0f);
     lr.name = "45Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
-    lr.desiredRefreshRate = 30.0f;
+    lr.desiredRefreshRate = Fps(30.0f);
     lr.name = "30Hz Heuristic";
     EXPECT_EQ(mExpected30Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     lr.name = "24Hz Heuristic";
     EXPECT_EQ(mExpected72Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
-    lr.desiredRefreshRate = 24.0f;
+    lr.desiredRefreshRate = Fps(24.0f);
     lr.vote = LayerVoteType::ExplicitExactOrMultiple;
     lr.name = "24Hz ExplicitExactOrMultiple";
     EXPECT_EQ(mExpected72Config,
@@ -736,39 +750,39 @@
 
     lr1.vote = LayerVoteType::Min;
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 24.0f;
+    lr2.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Min;
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 24.0f;
+    lr2.desiredRefreshRate = Fps(24.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Max;
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Max;
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Heuristic;
-    lr1.desiredRefreshRate = 15.0f;
+    lr1.desiredRefreshRate = Fps(15.0f);
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 45.0f;
+    lr2.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Heuristic;
-    lr1.desiredRefreshRate = 30.0f;
+    lr1.desiredRefreshRate = Fps(30.0f);
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 45.0f;
+    lr2.desiredRefreshRate = Fps(45.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
@@ -783,7 +797,7 @@
 
     lr.vote = LayerVoteType::ExplicitExactOrMultiple;
     for (float fps = 23.0f; fps < 25.0f; fps += 0.1f) {
-        lr.desiredRefreshRate = fps;
+        lr.desiredRefreshRate = Fps(fps);
         const auto& refreshRate =
                 refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false});
         EXPECT_EQ(mExpected60Config, refreshRate) << fps << "Hz chooses " << refreshRate.getName();
@@ -801,33 +815,33 @@
     auto& lr2 = layers[1];
 
     lr1.vote = LayerVoteType::Heuristic;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitDefault;
-    lr1.desiredRefreshRate = 90.0f;
+    lr1.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::Heuristic;
-    lr1.desiredRefreshRate = 90.0f;
+    lr1.desiredRefreshRate = Fps(90.0f);
     lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 }
 
 TEST_F(RefreshRateConfigsTest, testInPolicy) {
-    ASSERT_TRUE(mExpectedAlmost60Config.inPolicy(60.000004f, 60.000004f));
-    ASSERT_TRUE(mExpectedAlmost60Config.inPolicy(59.0f, 60.1f));
-    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(75.0f, 90.0f));
-    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(60.0011f, 90.0f));
-    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(50.0f, 59.998f));
+    ASSERT_TRUE(mExpectedAlmost60Config.inPolicy(Fps(60.000004f), Fps(60.000004f)));
+    ASSERT_TRUE(mExpectedAlmost60Config.inPolicy(Fps(59.0f), Fps(60.1f)));
+    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(Fps(75.0f), Fps(90.0f)));
+    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(Fps(60.0011f), Fps(90.0f)));
+    ASSERT_FALSE(mExpectedAlmost60Config.inPolicy(Fps(50.0f), Fps(59.998f)));
 }
 
 TEST_F(RefreshRateConfigsTest, getBestRefreshRate_75HzContent) {
@@ -840,7 +854,7 @@
 
     lr.vote = LayerVoteType::ExplicitExactOrMultiple;
     for (float fps = 75.0f; fps < 100.0f; fps += 0.1f) {
-        lr.desiredRefreshRate = fps;
+        lr.desiredRefreshRate = Fps(fps);
         const auto& refreshRate =
                 refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false});
         EXPECT_EQ(mExpected90Config, refreshRate) << fps << "Hz chooses " << refreshRate.getName();
@@ -858,25 +872,25 @@
     auto& lr2 = layers[1];
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::ExplicitDefault;
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.name = "90Hz ExplicitDefault";
     EXPECT_EQ(mExpected60Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Max;
     lr2.name = "Max";
@@ -884,16 +898,16 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 30.0f;
+    lr1.desiredRefreshRate = Fps(30.0f);
     lr1.name = "30Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 30.0f;
+    lr1.desiredRefreshRate = Fps(30.0f);
     lr1.name = "30Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Max;
     lr2.name = "Max";
@@ -912,7 +926,7 @@
     auto& lr2 = layers[1];
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::NoVote;
     lr2.name = "NoVote";
@@ -920,7 +934,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::NoVote;
     lr2.name = "NoVote";
@@ -928,7 +942,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Max;
     lr2.name = "Max";
@@ -936,7 +950,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Max;
     lr2.name = "Max";
@@ -945,10 +959,10 @@
 
     // The other layer starts to provide buffers
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 90.0f;
+    lr2.desiredRefreshRate = Fps(90.0f);
     lr2.name = "90Hz Heuristic";
     EXPECT_EQ(mExpected90Config,
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
@@ -972,40 +986,40 @@
     auto& lr2 = layers[1];
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.name = "60Hz Heuristic";
     refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false},
                                            &consideredSignals);
     EXPECT_EQ(true, consideredSignals.touch);
 
     lr1.vote = LayerVoteType::ExplicitDefault;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.name = "60Hz Heuristic";
     refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false},
                                            &consideredSignals);
     EXPECT_EQ(false, consideredSignals.touch);
 
     lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.name = "60Hz Heuristic";
     refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false},
                                            &consideredSignals);
     EXPECT_EQ(true, consideredSignals.touch);
 
     lr1.vote = LayerVoteType::ExplicitDefault;
-    lr1.desiredRefreshRate = 60.0f;
+    lr1.desiredRefreshRate = Fps(60.0f);
     lr1.name = "60Hz ExplicitExactOrMultiple";
     lr2.vote = LayerVoteType::Heuristic;
-    lr2.desiredRefreshRate = 60.0f;
+    lr2.desiredRefreshRate = Fps(60.0f);
     lr2.name = "60Hz Heuristic";
     refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false},
                                            &consideredSignals);
@@ -1041,7 +1055,7 @@
 
     for (const auto& test : testCases) {
         lr.vote = LayerVoteType::ExplicitDefault;
-        lr.desiredRefreshRate = test.first;
+        lr.desiredRefreshRate = Fps(test.first);
 
         std::stringstream ss;
         ss << "ExplicitDefault " << test.first << " fps";
@@ -1049,7 +1063,7 @@
 
         const auto& refreshRate =
                 refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false});
-        EXPECT_FLOAT_EQ(refreshRate.getFps(), test.second)
+        EXPECT_TRUE(refreshRate.getFps().equalsWithMargin(Fps(test.second)))
                 << "Expecting " << test.first << "fps => " << test.second << "Hz";
     }
 }
@@ -1061,7 +1075,7 @@
                                                  /*currentConfigId=*/HWC_CONFIG_ID_90);
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_90, {90.f, 90.f}, {60.f, 90.f}}),
+                      {HWC_CONFIG_ID_90, {Fps(90.f), Fps(90.f)}, {Fps(60.f), Fps(90.f)}}),
               0);
 
     auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
@@ -1069,7 +1083,7 @@
 
     RefreshRateConfigs::GlobalSignals consideredSignals;
     lr.vote = LayerVoteType::ExplicitDefault;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz ExplicitDefault";
     lr.focused = true;
     EXPECT_EQ(mExpected60Config,
@@ -1085,14 +1099,14 @@
                                                  /*currentConfigId=*/HWC_CONFIG_ID_60);
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_60, {60.f, 60.f}, {60.f, 90.f}}),
+                      {HWC_CONFIG_ID_60, {Fps(60.f), Fps(60.f)}, {Fps(60.f), Fps(90.f)}}),
               0);
 
     auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
     auto& lr = layers[0];
 
     lr.vote = LayerVoteType::ExplicitDefault;
-    lr.desiredRefreshRate = 90.0f;
+    lr.desiredRefreshRate = Fps(90.0f);
     lr.name = "90Hz ExplicitDefault";
     lr.focused = true;
     EXPECT_EQ(mExpected90Config,
@@ -1106,7 +1120,7 @@
                                                  /*currentConfigId=*/HWC_CONFIG_ID_90);
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_90, {90.f, 90.f}, {60.f, 90.f}}),
+                      {HWC_CONFIG_ID_90, {Fps(90.f), Fps(90.f)}, {Fps(60.f), Fps(90.f)}}),
               0);
 
     RefreshRateConfigs::GlobalSignals consideredSignals;
@@ -1119,7 +1133,7 @@
     auto& lr = layers[0];
 
     lr.vote = LayerVoteType::ExplicitExactOrMultiple;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz ExplicitExactOrMultiple";
     lr.focused = false;
     EXPECT_EQ(mExpected90Config,
@@ -1130,7 +1144,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr.vote = LayerVoteType::ExplicitDefault;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz ExplicitDefault";
     lr.focused = false;
     EXPECT_EQ(mExpected90Config,
@@ -1141,7 +1155,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr.vote = LayerVoteType::Heuristic;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz Heuristic";
     lr.focused = false;
     EXPECT_EQ(mExpected90Config,
@@ -1152,7 +1166,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr.vote = LayerVoteType::Max;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz Max";
     lr.focused = false;
     EXPECT_EQ(mExpected90Config,
@@ -1163,7 +1177,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
 
     lr.vote = LayerVoteType::Min;
-    lr.desiredRefreshRate = 60.0f;
+    lr.desiredRefreshRate = Fps(60.0f);
     lr.name = "60Hz Min";
     lr.focused = false;
     EXPECT_EQ(mExpected90Config,
@@ -1182,7 +1196,7 @@
     auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
     auto& layer = layers[0];
     layer.vote = LayerVoteType::ExplicitDefault;
-    layer.desiredRefreshRate = 90.0f;
+    layer.desiredRefreshRate = Fps(90.0f);
     layer.seamlessness = Seamlessness::SeamedAndSeamless;
     layer.name = "90Hz ExplicitDefault";
     layer.focused = true;
@@ -1207,7 +1221,7 @@
 
     // Verify that we won't do a seamless switch if we request the same mode as the default
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_90);
-    layer.desiredRefreshRate = 60.0f;
+    layer.desiredRefreshRate = Fps(60.0f);
     layer.name = "60Hz ExplicitDefault";
     layer.seamlessness = Seamlessness::OnlySeamless;
     ASSERT_EQ(HWC_CONFIG_ID_90,
@@ -1216,7 +1230,7 @@
 
     // Verify that if the current config is in another group and there are no layers with
     // seamlessness=SeamedAndSeamless we'll go back to the default group.
-    layer.desiredRefreshRate = 60.0f;
+    layer.desiredRefreshRate = Fps(60.0f);
     layer.name = "60Hz ExplicitDefault";
     layer.seamlessness = Seamlessness::Default;
     ASSERT_EQ(HWC_CONFIG_ID_60,
@@ -1231,7 +1245,7 @@
     layers.push_back(LayerRequirement{.weight = 0.5f});
     auto& layer2 = layers[layers.size() - 1];
     layer2.vote = LayerVoteType::ExplicitDefault;
-    layer2.desiredRefreshRate = 90.0f;
+    layer2.desiredRefreshRate = Fps(90.0f);
     layer2.name = "90Hz ExplicitDefault";
     layer2.seamlessness = Seamlessness::SeamedAndSeamless;
     layer2.focused = false;
@@ -1262,7 +1276,7 @@
     auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
     auto& layer = layers[0];
     layer.vote = LayerVoteType::ExplicitExactOrMultiple;
-    layer.desiredRefreshRate = 60.0f;
+    layer.desiredRefreshRate = Fps(60.0f);
     layer.seamlessness = Seamlessness::SeamedAndSeamless;
     layer.name = "60Hz ExplicitExactOrMultiple";
     layer.focused = true;
@@ -1291,13 +1305,13 @@
     auto layers = std::vector<
             LayerRequirement>{LayerRequirement{.name = "60Hz ExplicitDefault",
                                                .vote = LayerVoteType::ExplicitDefault,
-                                               .desiredRefreshRate = 60.0f,
+                                               .desiredRefreshRate = Fps(60.0f),
                                                .seamlessness = Seamlessness::SeamedAndSeamless,
                                                .weight = 0.5f,
                                                .focused = false},
                               LayerRequirement{.name = "25Hz ExplicitExactOrMultiple",
                                                .vote = LayerVoteType::ExplicitExactOrMultiple,
-                                               .desiredRefreshRate = 25.0f,
+                                               .desiredRefreshRate = Fps(25.0f),
                                                .seamlessness = Seamlessness::OnlySeamless,
                                                .weight = 1.0f,
                                                .focused = true}};
@@ -1307,7 +1321,7 @@
               refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
                       .getConfigId());
 
-    seamedLayer.name = "30Hz ExplicitDefault", seamedLayer.desiredRefreshRate = 30.0f;
+    seamedLayer.name = "30Hz ExplicitDefault", seamedLayer.desiredRefreshRate = Fps(30.0f);
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_30);
 
     ASSERT_EQ(HWC_CONFIG_ID_25,
@@ -1325,7 +1339,7 @@
 
     // Return the config ID from calling getBestRefreshRate() for a single layer with the
     // given voteType and fps.
-    auto getFrameRate = [&](LayerVoteType voteType, float fps, bool touchActive = false,
+    auto getFrameRate = [&](LayerVoteType voteType, Fps fps, bool touchActive = false,
                             bool focused = true) -> HwcConfigIndexType {
         layers[0].vote = voteType;
         layers[0].desiredRefreshRate = fps;
@@ -1335,43 +1349,44 @@
     };
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_60, {30.f, 60.f}, {30.f, 90.f}}),
+                      {HWC_CONFIG_ID_60, {Fps(30.f), Fps(60.f)}, {Fps(30.f), Fps(90.f)}}),
               0);
     EXPECT_EQ(HWC_CONFIG_ID_60,
               refreshRateConfigs->getBestRefreshRate({}, {.touch = false, .idle = false})
                       .getConfigId());
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::NoVote, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_30, getFrameRate(LayerVoteType::Min, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Heuristic, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_90, getFrameRate(LayerVoteType::ExplicitDefault, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitExactOrMultiple, 90.f));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::NoVote, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_30, getFrameRate(LayerVoteType::Min, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Heuristic, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_90, getFrameRate(LayerVoteType::ExplicitDefault, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitExactOrMultiple, Fps(90.f)));
 
     // Layers not focused are not allowed to override primary config
     EXPECT_EQ(HWC_CONFIG_ID_60,
-              getFrameRate(LayerVoteType::ExplicitDefault, 90.f, /*touch=*/false,
+              getFrameRate(LayerVoteType::ExplicitDefault, Fps(90.f), /*touch=*/false,
                            /*focused=*/false));
     EXPECT_EQ(HWC_CONFIG_ID_60,
-              getFrameRate(LayerVoteType::ExplicitExactOrMultiple, 90.f, /*touch=*/false,
+              getFrameRate(LayerVoteType::ExplicitExactOrMultiple, Fps(90.f), /*touch=*/false,
                            /*focused=*/false));
 
     // Touch boost should be restricted to the primary range.
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, 90.f, /*touch=*/true));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, Fps(90.f), /*touch=*/true));
     // When we're higher than the primary range max due to a layer frame rate setting, touch boost
     // shouldn't drag us back down to the primary range max.
-    EXPECT_EQ(HWC_CONFIG_ID_90, getFrameRate(LayerVoteType::ExplicitDefault, 90.f, /*touch=*/true));
+    EXPECT_EQ(HWC_CONFIG_ID_90,
+              getFrameRate(LayerVoteType::ExplicitDefault, Fps(90.f), /*touch=*/true));
     EXPECT_EQ(HWC_CONFIG_ID_60,
-              getFrameRate(LayerVoteType::ExplicitExactOrMultiple, 90.f, /*touch=*/true));
+              getFrameRate(LayerVoteType::ExplicitExactOrMultiple, Fps(90.f), /*touch=*/true));
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_60, {60.f, 60.f}, {60.f, 60.f}}),
+                      {HWC_CONFIG_ID_60, {Fps(60.f), Fps(60.f)}, {Fps(60.f), Fps(60.f)}}),
               0);
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::NoVote, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Min, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Heuristic, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitDefault, 90.f));
-    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitExactOrMultiple, 90.f));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::NoVote, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Min, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Max, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::Heuristic, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitDefault, Fps(90.f)));
+    EXPECT_EQ(HWC_CONFIG_ID_60, getFrameRate(LayerVoteType::ExplicitExactOrMultiple, Fps(90.f)));
 }
 
 TEST_F(RefreshRateConfigsTest, idle) {
@@ -1385,7 +1400,7 @@
     const auto getIdleFrameRate = [&](LayerVoteType voteType,
                                       bool touchActive) -> HwcConfigIndexType {
         layers[0].vote = voteType;
-        layers[0].desiredRefreshRate = 90.f;
+        layers[0].desiredRefreshRate = Fps(90.f);
         RefreshRateConfigs::GlobalSignals consideredSignals;
         const auto configId =
                 refreshRateConfigs
@@ -1398,7 +1413,7 @@
     };
 
     ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy(
-                      {HWC_CONFIG_ID_60, {60.f, 90.f}, {60.f, 90.f}}),
+                      {HWC_CONFIG_ID_60, {Fps(60.f), Fps(90.f)}, {Fps(60.f), Fps(90.f)}}),
               0);
 
     // Idle should be lower priority than touch boost.
@@ -1439,22 +1454,22 @@
                                                  /*currentConfigId=*/HWC_CONFIG_ID_60);
 
     for (float fps = 1.0f; fps <= 120.0f; fps += 0.1f) {
-        const auto knownFrameRate = findClosestKnownFrameRate(*refreshRateConfigs, fps);
-        float expectedFrameRate;
+        const auto knownFrameRate = findClosestKnownFrameRate(*refreshRateConfigs, Fps(fps));
+        Fps expectedFrameRate;
         if (fps < 26.91f) {
-            expectedFrameRate = 24.0f;
+            expectedFrameRate = Fps(24.0f);
         } else if (fps < 37.51f) {
-            expectedFrameRate = 30.0f;
+            expectedFrameRate = Fps(30.0f);
         } else if (fps < 52.51f) {
-            expectedFrameRate = 45.0f;
+            expectedFrameRate = Fps(45.0f);
         } else if (fps < 66.01f) {
-            expectedFrameRate = 60.0f;
+            expectedFrameRate = Fps(60.0f);
         } else if (fps < 81.01f) {
-            expectedFrameRate = 72.0f;
+            expectedFrameRate = Fps(72.0f);
         } else {
-            expectedFrameRate = 90.0f;
+            expectedFrameRate = Fps(90.0f);
         }
-        EXPECT_FLOAT_EQ(expectedFrameRate, knownFrameRate)
+        EXPECT_TRUE(expectedFrameRate.equalsWithMargin(knownFrameRate))
                 << "findClosestKnownFrameRate(" << fps << ") = " << knownFrameRate;
     }
 }
@@ -1465,26 +1480,27 @@
                                                  /*currentConfigId=*/HWC_CONFIG_ID_60);
 
     struct ExpectedRate {
-        float rate;
+        Fps rate;
         const RefreshRate& expected;
     };
 
     /* clang-format off */
     std::vector<ExpectedRate> knownFrameRatesExpectations = {
-        {24.0f, mExpected60Config},
-        {30.0f, mExpected60Config},
-        {45.0f, mExpected90Config},
-        {60.0f, mExpected60Config},
-        {72.0f, mExpected90Config},
-        {90.0f, mExpected90Config},
+        {Fps(24.0f), mExpected60Config},
+        {Fps(30.0f), mExpected60Config},
+        {Fps(45.0f), mExpected90Config},
+        {Fps(60.0f), mExpected60Config},
+        {Fps(72.0f), mExpected90Config},
+        {Fps(90.0f), mExpected90Config},
     };
     /* clang-format on */
 
     // Make sure the test tests all the known frame rate
     const auto knownFrameRateList = getKnownFrameRate(*refreshRateConfigs);
-    const auto equal = std::equal(knownFrameRateList.begin(), knownFrameRateList.end(),
-                                  knownFrameRatesExpectations.begin(),
-                                  [](float a, const ExpectedRate& b) { return a == b.rate; });
+    const auto equal =
+            std::equal(knownFrameRateList.begin(), knownFrameRateList.end(),
+                       knownFrameRatesExpectations.begin(),
+                       [](Fps a, const ExpectedRate& b) { return a.equalsWithMargin(b.rate); });
     EXPECT_TRUE(equal);
 
     auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
@@ -1514,15 +1530,18 @@
     EXPECT_EQ(KernelIdleTimerAction::TurnOn, refreshRateConfigs->getIdleTimerAction());
 
     // SetPolicy(60, 90), current 60Hz => TurnOn.
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {60, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(60), Fps(90)}}),
+              0);
     EXPECT_EQ(KernelIdleTimerAction::TurnOn, refreshRateConfigs->getIdleTimerAction());
 
     // SetPolicy(60, 60), current 60Hz => NoChange, avoid extra calls.
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {60, 60}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_60, {Fps(60), Fps(60)}}),
+              0);
     EXPECT_EQ(KernelIdleTimerAction::NoChange, refreshRateConfigs->getIdleTimerAction());
 
     // SetPolicy(90, 90), current 90Hz => TurnOff.
-    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {90, 90}}), 0);
+    ASSERT_GE(refreshRateConfigs->setDisplayManagerPolicy({HWC_CONFIG_ID_90, {Fps(90), Fps(90)}}),
+              0);
     EXPECT_EQ(KernelIdleTimerAction::TurnOff, refreshRateConfigs->getIdleTimerAction());
 }
 
@@ -1554,7 +1573,7 @@
     EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
 
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_90);
-    refreshRateConfigs->setPreferredRefreshRateForUid({uid, 22.5});
+    refreshRateConfigs->setPreferredRefreshRateForUid({uid, 22.5f});
     EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
     refreshRateConfigs->setPreferredRefreshRateForUid({uid, 22.6f});
     EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
diff --git a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
index 5278641..c47b141 100644
--- a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
@@ -108,11 +108,12 @@
  */
 class SetFrameRateTest : public ::testing::TestWithParam<std::shared_ptr<LayerFactory>> {
 protected:
-    const FrameRate FRAME_RATE_VOTE1 = FrameRate(67.f, FrameRateCompatibility::Default);
-    const FrameRate FRAME_RATE_VOTE2 = FrameRate(14.f, FrameRateCompatibility::ExactOrMultiple);
-    const FrameRate FRAME_RATE_VOTE3 = FrameRate(99.f, FrameRateCompatibility::NoVote);
-    const FrameRate FRAME_RATE_TREE = FrameRate(0, FrameRateCompatibility::NoVote);
-    const FrameRate FRAME_RATE_NO_VOTE = FrameRate(0, FrameRateCompatibility::Default);
+    const FrameRate FRAME_RATE_VOTE1 = FrameRate(Fps(67.f), FrameRateCompatibility::Default);
+    const FrameRate FRAME_RATE_VOTE2 =
+            FrameRate(Fps(14.f), FrameRateCompatibility::ExactOrMultiple);
+    const FrameRate FRAME_RATE_VOTE3 = FrameRate(Fps(99.f), FrameRateCompatibility::NoVote);
+    const FrameRate FRAME_RATE_TREE = FrameRate(Fps(0.f), FrameRateCompatibility::NoVote);
+    const FrameRate FRAME_RATE_NO_VOTE = FrameRate(Fps(0.f), FrameRateCompatibility::Default);
 
     SetFrameRateTest();
 
diff --git a/services/surfaceflinger/tests/unittests/VsyncConfigurationTest.cpp b/services/surfaceflinger/tests/unittests/VsyncConfigurationTest.cpp
index 72ee6db..2a35f69 100644
--- a/services/surfaceflinger/tests/unittests/VsyncConfigurationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VsyncConfigurationTest.cpp
@@ -29,17 +29,18 @@
 
 class TestableWorkDuration : public impl::WorkDuration {
 public:
-    TestableWorkDuration(float currentFps, nsecs_t sfDuration, nsecs_t appDuration,
+    TestableWorkDuration(Fps currentFps, nsecs_t sfDuration, nsecs_t appDuration,
                          nsecs_t sfEarlyDuration, nsecs_t appEarlyDuration,
                          nsecs_t sfEarlyGlDuration, nsecs_t appEarlyGlDuration)
-          : impl::WorkDuration({60.0f, 90.0f}, currentFps, sfDuration, appDuration, sfEarlyDuration,
-                               appEarlyDuration, sfEarlyGlDuration, appEarlyGlDuration) {}
+          : impl::WorkDuration({Fps(60.0f), Fps(90.0f)}, currentFps, sfDuration, appDuration,
+                               sfEarlyDuration, appEarlyDuration, sfEarlyGlDuration,
+                               appEarlyGlDuration) {}
 };
 
 class WorkDurationTest : public testing::Test {
 protected:
     WorkDurationTest()
-          : mWorkDuration(60.0f, 10'500'000, 20'500'000, 16'000'000, 16'500'000, 13'500'000,
+          : mWorkDuration(Fps(60.0f), 10'500'000, 20'500'000, 16'000'000, 16'500'000, 13'500'000,
                           21'000'000) {}
 
     ~WorkDurationTest() = default;
@@ -51,9 +52,9 @@
  * Test cases
  */
 TEST_F(WorkDurationTest, getConfigsForRefreshRate_60Hz) {
-    mWorkDuration.setRefreshRateFps(60.0f);
+    mWorkDuration.setRefreshRateFps(Fps(60.0f));
     auto currentOffsets = mWorkDuration.getCurrentConfigs();
-    auto offsets = mWorkDuration.getConfigsForRefreshRate(60.0f);
+    auto offsets = mWorkDuration.getConfigsForRefreshRate(Fps(60.0f));
 
     EXPECT_EQ(currentOffsets, offsets);
     EXPECT_EQ(offsets.late.sfOffset, 6'166'667);
@@ -76,9 +77,9 @@
 }
 
 TEST_F(WorkDurationTest, getConfigsForRefreshRate_90Hz) {
-    mWorkDuration.setRefreshRateFps(90.0f);
+    mWorkDuration.setRefreshRateFps(Fps(90.0f));
     auto currentOffsets = mWorkDuration.getCurrentConfigs();
-    auto offsets = mWorkDuration.getConfigsForRefreshRate(90.0f);
+    auto offsets = mWorkDuration.getConfigsForRefreshRate(Fps(90.0f));
 
     EXPECT_EQ(currentOffsets, offsets);
     EXPECT_EQ(offsets.late.sfOffset, 611'111);
@@ -101,7 +102,7 @@
 }
 
 TEST_F(WorkDurationTest, getConfigsForRefreshRate_DefaultOffsets) {
-    TestableWorkDuration phaseOffsetsWithDefaultValues(60.0f, -1, -1, -1, -1, -1, -1);
+    TestableWorkDuration phaseOffsetsWithDefaultValues(Fps(60.0f), -1, -1, -1, -1, -1, -1);
 
     auto validateOffsets = [](const auto& offsets, std::chrono::nanoseconds vsyncPeriod) {
         EXPECT_EQ(offsets.late.sfOffset, 1'000'000);
@@ -123,21 +124,20 @@
         EXPECT_EQ(offsets.earlyGpu.appWorkDuration, vsyncPeriod);
     };
 
-    const auto testForRefreshRate = [&](float refreshRate) {
+    const auto testForRefreshRate = [&](Fps refreshRate) {
         phaseOffsetsWithDefaultValues.setRefreshRateFps(refreshRate);
         auto currentOffsets = phaseOffsetsWithDefaultValues.getCurrentConfigs();
         auto offsets = phaseOffsetsWithDefaultValues.getConfigsForRefreshRate(refreshRate);
         EXPECT_EQ(currentOffsets, offsets);
-        validateOffsets(offsets,
-                        std::chrono::nanoseconds(static_cast<nsecs_t>(1e9f / refreshRate)));
+        validateOffsets(offsets, std::chrono::nanoseconds(refreshRate.getPeriodNsecs()));
     };
 
-    testForRefreshRate(90.0f);
-    testForRefreshRate(60.0f);
+    testForRefreshRate(Fps(90.0f));
+    testForRefreshRate(Fps(60.0f));
 }
 
 TEST_F(WorkDurationTest, getConfigsForRefreshRate_unknownRefreshRate) {
-    auto offsets = mWorkDuration.getConfigsForRefreshRate(14.7f);
+    auto offsets = mWorkDuration.getConfigsForRefreshRate(Fps(14.7f));
 
     EXPECT_EQ(offsets.late.sfOffset, 57'527'208);
     EXPECT_EQ(offsets.late.appOffset, 37'027'208);
@@ -171,9 +171,9 @@
                          std::optional<nsecs_t> highFpsEarlyAppOffsetNs,
                          std::optional<nsecs_t> highFpsEarlyGpuAppOffsetNs,
                          nsecs_t thresholdForNextVsync)
-          : impl::PhaseOffsets({60.0f, 90.0f}, 60.0f, vsyncPhaseOffsetNs, sfVSyncPhaseOffsetNs,
-                               earlySfOffsetNs, earlyGpuSfOffsetNs, earlyAppOffsetNs,
-                               earlyGpuAppOffsetNs, highFpsVsyncPhaseOffsetNs,
+          : impl::PhaseOffsets({Fps(60.0f), Fps(90.0f)}, Fps(60.0f), vsyncPhaseOffsetNs,
+                               sfVSyncPhaseOffsetNs, earlySfOffsetNs, earlyGpuSfOffsetNs,
+                               earlyAppOffsetNs, earlyGpuAppOffsetNs, highFpsVsyncPhaseOffsetNs,
                                highFpsSfVSyncPhaseOffsetNs, highFpsEarlySfOffsetNs,
                                highFpsEarlyGpuSfOffsetNs, highFpsEarlyAppOffsetNs,
                                highFpsEarlyGpuAppOffsetNs, thresholdForNextVsync) {}
@@ -190,7 +190,7 @@
 };
 
 TEST_F(PhaseOffsetsTest, getConfigsForRefreshRate_unknownRefreshRate) {
-    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(14.7f);
+    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(Fps(14.7f));
 
     EXPECT_EQ(offsets.late.sfOffset, 6'000'000);
     EXPECT_EQ(offsets.late.appOffset, 2'000'000);
@@ -212,7 +212,7 @@
 }
 
 TEST_F(PhaseOffsetsTest, getConfigsForRefreshRate_60Hz) {
-    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(60.0f);
+    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(Fps(60.0f));
 
     EXPECT_EQ(offsets.late.sfOffset, 6'000'000);
     EXPECT_EQ(offsets.late.appOffset, 2'000'000);
@@ -234,7 +234,7 @@
 }
 
 TEST_F(PhaseOffsetsTest, getConfigsForRefreshRate_90Hz) {
-    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(90.0f);
+    auto offsets = mPhaseOffsets.getConfigsForRefreshRate(Fps(90.0f));
 
     EXPECT_EQ(offsets.late.sfOffset, 1'000'000);
     EXPECT_EQ(offsets.late.appOffset, 2'000'000);
@@ -258,7 +258,7 @@
 TEST_F(PhaseOffsetsTest, getConfigsForRefreshRate_DefaultValues_60Hz) {
     TestablePhaseOffsets phaseOffsets{1'000'000, 1'000'000, {}, {}, {}, {},        2'000'000,
                                       1'000'000, {},        {}, {}, {}, 10'000'000};
-    auto offsets = phaseOffsets.getConfigsForRefreshRate(60.0f);
+    auto offsets = phaseOffsets.getConfigsForRefreshRate(Fps(60.0f));
 
     EXPECT_EQ(offsets.late.sfOffset, 1'000'000);
     EXPECT_EQ(offsets.late.appOffset, 1'000'000);
@@ -282,7 +282,7 @@
 TEST_F(PhaseOffsetsTest, getConfigsForRefreshRate_DefaultValues_90Hz) {
     TestablePhaseOffsets phaseOffsets{1'000'000, 1'000'000, {}, {}, {}, {},        2'000'000,
                                       1'000'000, {},        {}, {}, {}, 10'000'000};
-    auto offsets = phaseOffsets.getConfigsForRefreshRate(90.0f);
+    auto offsets = phaseOffsets.getConfigsForRefreshRate(Fps(90.0f));
 
     EXPECT_EQ(offsets.late.sfOffset, 1'000'000);
     EXPECT_EQ(offsets.late.appOffset, 2'000'000);