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Commit 1ac79cbd authored by Mark Salyzyn's avatar Mark Salyzyn
Browse files

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
parent 659b7d63

liblog/tests/liblog_benchmark.cpp

+14 −0
Original line number Original line Diff line number Diff line
@@ -266,3 +266,17 @@ static void BM_log_delay(int iters) { 
    android_logger_list_free(logger_list);

    android_logger_list_free(logger_list);

}

}

BENCHMARK(BM_log_delay);

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);