commit cf03cf14dc19884585528ba402fda02689bebb01
author Steven Moreland <smoreland@google.com> Fri Dec 04 02:58:40 2020 +0000
committer Steven Moreland <smoreland@google.com> Fri Dec 04 19:18:26 2020 +0000
tree ad295ece2bd645ed6fc84d6bced543cc8e10e0d0
parent 8662ab7f4b721d53744c1d98295ac6be5dd80bc7

libbinder: support inheriting realtime priority

gotta go fast

Bug: 170420170
Test: atest binderLibTest
Change-Id: I2f2c6cb35ebf463d90b517e134b9ea3114764af6

libs/binder/tests/binderLibTest.cpp

diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index ad4729d..0f7d159 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -30,6 +30,7 @@
 #include <binder/IServiceManager.h>
 
 #include <private/binder/binder_module.h>
+#include <linux/sched.h>
 #include <sys/epoll.h>
 #include <sys/prctl.h>
 
@@ -53,6 +54,7 @@
 
 static constexpr int kSchedPolicy = SCHED_RR;
 static constexpr int kSchedPriority = 7;
+static constexpr int kSchedPriorityMore = 8;
 
 static String16 binderLibTestServiceName = String16("test.binderLib");
 
@@ -1088,6 +1090,25 @@
     EXPECT_EQ(kSchedPriority, priority);
 }
 
+TEST_F(BinderLibTest, InheritRt) {
+    sp<IBinder> server = addServer();
+    ASSERT_TRUE(server != nullptr);
+
+    const struct sched_param param {
+        .sched_priority = kSchedPriorityMore,
+    };
+    EXPECT_EQ(0, sched_setscheduler(getpid(), SCHED_RR, &param));
+
+    Parcel data, reply;
+    status_t ret = server->transact(BINDER_LIB_TEST_GET_SCHEDULING_POLICY, data, &reply);
+    EXPECT_EQ(NO_ERROR, ret);
+
+    int policy = reply.readInt32();
+    int priority = reply.readInt32();
+
+    EXPECT_EQ(kSchedPolicy, policy & (~SCHED_RESET_ON_FORK));
+    EXPECT_EQ(kSchedPriorityMore, priority);
+}
 
 TEST_F(BinderLibTest, VectorSent) {
     Parcel data, reply;
@@ -1460,6 +1481,8 @@
 
         testService->setMinSchedulerPolicy(kSchedPolicy, kSchedPriority);
 
+        testService->setInheritRt(true);
+
         /*
          * Normally would also contain functionality as well, but we are only
          * testing the extension mechanism.