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platform_system_core
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Merge changes Ic590c230,Ibd4be82b am: 3c013de8d8 am: 0b743b925e 

am: f9785f5c4d

Change-Id: I35b260af5fe6ae0b205eebb661e789eaecea505f
This commit is contained in:
Mark Salyzyn 2017-04-03 14:32:28 +00:00 committed by android-build-merger
parent 005ee6480c f9785f5c4d
commit 8f066045a8
3 changed files with 38 additions and 10 deletions
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26
liblog/tests/liblog_benchmark.cpp
View File

@ -527,11 +527,13 @@ BENCHMARK(BM_log_print_overhead);
/*
* Measure the time it takes to submit the android event logging call
* using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
* under light load. Expect this to be a dozen or so syscall periods (40us)
* under light load. Expect this to be a long path to logger to convert the
* unknown tag (0) into a tagname (less than 200us).
*/
static void BM_log_event_overhead(int iters) {
for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
StartBenchmarkTiming();
// log tag number 0 is not known, nor shall it ever be known
__android_log_btwrite(0, EVENT_TYPE_LONG, &i, sizeof(i));
StopBenchmarkTiming();
logd_yield();
@ -539,6 +541,28 @@ static void BM_log_event_overhead(int iters) {
}
BENCHMARK(BM_log_event_overhead);
/*
* Measure the time it takes to submit the android event logging call
* using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
* under light load with a known logtag. Expect this to be a dozen or so
* syscall periods (less than 40us)
*/
static void BM_log_event_overhead_42(int iters) {
for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
StartBenchmarkTiming();
// In system/core/logcat/event.logtags:
// # These are used for testing, do not modify without updating
// # tests/framework-tests/src/android/util/EventLogFunctionalTest.java.
// # system/core/liblog/tests/liblog_benchmark.cpp
// # system/core/liblog/tests/liblog_test.cpp
// 42 answer (to life the universe etc|3)
__android_log_btwrite(42, EVENT_TYPE_LONG, &i, sizeof(i));
StopBenchmarkTiming();
logd_yield();
}
}
BENCHMARK(BM_log_event_overhead_42);
static void BM_log_event_overhead_null(int iters) {
set_log_null();
BM_log_event_overhead(iters);

2
logcat/event.logtags
View File

@ -36,6 +36,8 @@
# These are used for testing, do not modify without updating
# tests/framework-tests/src/android/util/EventLogFunctionalTest.java.
# system/core/liblog/tests/liblog_benchmark.cpp
# system/core/liblog/tests/liblog_test.cpp
42 answer (to life the universe etc|3)
314 pi
2718 e

20
logd/tests/logd_test.cpp
View File

@ -426,7 +426,7 @@ TEST(logd, benchmark) {
" BM_log_maximum_retry"
" BM_log_maximum"
" BM_clock_overhead"
" BM_log_overhead"
" BM_log_print_overhead"
" BM_log_latency"
" BM_log_delay",
"r")));
@ -434,13 +434,13 @@ TEST(logd, benchmark) {
char buffer[5120];
static const char* benchmarks[] = {
"BM_log_maximum_retry ", "BM_log_maximum ", "BM_clock_overhead ",
"BM_log_overhead ", "BM_log_latency ", "BM_log_delay "
"BM_log_maximum_retry ", "BM_log_maximum ", "BM_clock_overhead ",
"BM_log_print_overhead ", "BM_log_latency ", "BM_log_delay "
};
static const unsigned int log_maximum_retry = 0;
static const unsigned int log_maximum = 1;
static const unsigned int clock_overhead = 2;
static const unsigned int log_overhead = 3;
static const unsigned int log_print_overhead = 3;
static const unsigned int log_latency = 4;
static const unsigned int log_delay = 5;
@ -469,21 +469,23 @@ TEST(logd, benchmark) {
}
EXPECT_GE(200000UL, ns[log_maximum_retry]); // 104734 user
EXPECT_NE(0UL, ns[log_maximum_retry]); // failure to parse
EXPECT_GE(90000UL, ns[log_maximum]); // 46913 user
EXPECT_NE(0UL, ns[log_maximum]); // failure to parse
EXPECT_GE(4096UL, ns[clock_overhead]); // 4095
EXPECT_NE(0UL, ns[clock_overhead]); // failure to parse
EXPECT_GE(250000UL, ns[log_overhead]); // 126886 user
EXPECT_GE(250000UL, ns[log_print_overhead]); // 126886 user
EXPECT_NE(0UL, ns[log_print_overhead]); // failure to parse
EXPECT_GE(10000000UL,
ns[log_latency]); // 1453559 user space (background cgroup)
EXPECT_NE(0UL, ns[log_latency]); // failure to parse
EXPECT_GE(20000000UL, ns[log_delay]); // 10500289 user
for (unsigned i = 0; i < arraysize(ns); ++i) {
EXPECT_NE(0UL, ns[i]);
}
EXPECT_NE(0UL, ns[log_delay]); // failure to parse
alloc_statistics(&buf, &len);