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| author | Mark Salyzyn <salyzyn@google.com> | 2015-04-23 15:08:11 -0700 |
|---|---|---|
| committer | Mark Salyzyn <salyzyn@google.com> | 2015-04-24 07:59:44 -0700 |
| commit | 1ac79cbd89938649e5bc963d74b417e8a8ed53d7 (patch) | |
| tree | 29a09c3ef5d65ddddf57acc90fab454ba53103ef /liblog | |
| parent | 659b7d633a03a03674f82f02f567ac5ff18fba41 (diff) | |
| download | system_core-1ac79cbd89938649e5bc963d74b417e8a8ed53d7.zip system_core-1ac79cbd89938649e5bc963d74b417e8a8ed53d7.tar.gz system_core-1ac79cbd89938649e5bc963d74b417e8a8ed53d7.tar.bz2 | |
liblog: Add BM_is_loggable benchmark
- On a N9 64-bit benchmark, the __android_log_is_loggable overhead
is roughly 500ns (1/2 of a syscall?)
Bug: 19544788
Bug: 17760225
Bug: 20416721
Change-Id: Ib9e4d06d96e1b19ca5d459e569ead451ef47a9c0
Diffstat (limited to 'liblog')
| -rw-r--r-- | liblog/tests/liblog_benchmark.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/liblog/tests/liblog_benchmark.cpp b/liblog/tests/liblog_benchmark.cpp index 979aded..b594634 100644 --- a/liblog/tests/liblog_benchmark.cpp +++ b/liblog/tests/liblog_benchmark.cpp @@ -266,3 +266,17 @@ static void BM_log_delay(int iters) { android_logger_list_free(logger_list); } BENCHMARK(BM_log_delay); + +/* + * Measure the time it takes for __android_log_is_loggable. + */ +static void BM_is_loggable(int iters) { + StartBenchmarkTiming(); + + for (int i = 0; i < iters; ++i) { + __android_log_is_loggable(ANDROID_LOG_WARN, "logd", ANDROID_LOG_VERBOSE); + } + + StopBenchmarkTiming(); +} +BENCHMARK(BM_is_loggable); |