Measure total time in state
This measure is not affected by uid removals and is monotonic. That
makes it a good fit for CPU telemetry in statsd.
Bug: 174245730
Test: manually compare total with uid breakdown
Test: atest libtimeinstate_test
Change-Id: I8f17348f6eed49474826a1bd1cbd150207171e2c
diff --git a/libs/cputimeinstate/testtimeinstate.cpp b/libs/cputimeinstate/testtimeinstate.cpp
index 519689b..d25b2e9 100644
--- a/libs/cputimeinstate/testtimeinstate.cpp
+++ b/libs/cputimeinstate/testtimeinstate.cpp
@@ -40,6 +40,12 @@
using std::vector;
+TEST(TimeInStateTest, TotalTimeInState) {
+ auto times = getTotalCpuFreqTimes();
+ ASSERT_TRUE(times.has_value());
+ EXPECT_FALSE(times->empty());
+}
+
TEST(TimeInStateTest, SingleUidTimeInState) {
auto times = getUidCpuFreqTimes(0);
ASSERT_TRUE(times.has_value());
@@ -186,6 +192,31 @@
}
}
+TEST(TimeInStateTest, TotalAndAllUidTimeInStateConsistent) {
+ auto allUid = getUidsCpuFreqTimes();
+ auto total = getTotalCpuFreqTimes();
+
+ ASSERT_TRUE(allUid.has_value() && total.has_value());
+
+ // Check the number of policies.
+ ASSERT_EQ(allUid->at(0).size(), total->size());
+
+ for (uint32_t policyIdx = 0; policyIdx < total->size(); ++policyIdx) {
+ std::vector<uint64_t> totalTimes = total->at(policyIdx);
+ uint32_t totalFreqsCount = totalTimes.size();
+ std::vector<uint64_t> allUidTimes(totalFreqsCount, 0);
+ for (auto const &[uid, uidTimes]: *allUid) {
+ for (uint32_t freqIdx = 0; freqIdx < uidTimes[policyIdx].size(); ++freqIdx) {
+ allUidTimes[std::min(freqIdx, totalFreqsCount - 1)] += uidTimes[policyIdx][freqIdx];
+ }
+ }
+
+ for (uint32_t freqIdx = 0; freqIdx < totalFreqsCount; ++freqIdx) {
+ ASSERT_LE(allUidTimes[freqIdx], totalTimes[freqIdx]);
+ }
+ }
+}
+
TEST(TimeInStateTest, SingleAndAllUidTimeInStateConsistent) {
uint64_t zero = 0;
auto maps = {getUidsCpuFreqTimes(), getUidsUpdatedCpuFreqTimes(&zero)};
@@ -292,6 +323,22 @@
ASSERT_LE(after - before, NSEC_PER_SEC * 2 * get_nprocs_conf());
}
+TEST(TimeInStateTest, TotalTimeInStateMonotonic) {
+ auto before = getTotalCpuFreqTimes();
+ ASSERT_TRUE(before.has_value());
+ sleep(1);
+ auto after = getTotalCpuFreqTimes();
+ ASSERT_TRUE(after.has_value());
+
+ for (uint32_t policyIdx = 0; policyIdx < after->size(); ++policyIdx) {
+ auto timesBefore = before->at(policyIdx);
+ auto timesAfter = after->at(policyIdx);
+ for (uint32_t freqIdx = 0; freqIdx < timesAfter.size(); ++freqIdx) {
+ ASSERT_NO_FATAL_FAILURE(TestCheckDelta(timesBefore[freqIdx], timesAfter[freqIdx]));
+ }
+ }
+}
+
TEST(TimeInStateTest, AllUidTimeInStateMonotonic) {
auto map1 = getUidsCpuFreqTimes();
ASSERT_TRUE(map1.has_value());