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Merge "liblog: clock_gettime, clock_getres and time benchmarks"

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Treehugger Robot 2018-01-16 18:33:48 +00:00 • committed by Gerrit Code Review
commit 5ee641c6cd
1 changed files with 60 additions and 0 deletions
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liblog/tests/liblog_benchmark.cpp
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@ -19,6 +19,7 @@
#include <poll.h> #include <poll.h>
#include <sys/endian.h> #include <sys/endian.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
@ -107,6 +108,65 @@ static void BM_clock_overhead(benchmark::State& state) {
} }
BENCHMARK(BM_clock_overhead); BENCHMARK(BM_clock_overhead);
static void do_clock_overhead(benchmark::State& state, clockid_t clk_id) {
timespec t;
while (state.KeepRunning()) {
clock_gettime(clk_id, &t);
}
}
static void BM_time_clock_gettime_REALTIME(benchmark::State& state) {
do_clock_overhead(state, CLOCK_REALTIME);
}
BENCHMARK(BM_time_clock_gettime_REALTIME);
static void BM_time_clock_gettime_MONOTONIC(benchmark::State& state) {
do_clock_overhead(state, CLOCK_MONOTONIC);
}
BENCHMARK(BM_time_clock_gettime_MONOTONIC);
static void BM_time_clock_gettime_MONOTONIC_syscall(benchmark::State& state) {
timespec t;
while (state.KeepRunning()) {
syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
}
}
BENCHMARK(BM_time_clock_gettime_MONOTONIC_syscall);
static void BM_time_clock_gettime_MONOTONIC_RAW(benchmark::State& state) {
do_clock_overhead(state, CLOCK_MONOTONIC_RAW);
}
BENCHMARK(BM_time_clock_gettime_MONOTONIC_RAW);
static void BM_time_clock_gettime_BOOTTIME(benchmark::State& state) {
do_clock_overhead(state, CLOCK_BOOTTIME);
}
BENCHMARK(BM_time_clock_gettime_BOOTTIME);
static void BM_time_clock_getres_MONOTONIC(benchmark::State& state) {
timespec t;
while (state.KeepRunning()) {
clock_getres(CLOCK_MONOTONIC, &t);
}
}
BENCHMARK(BM_time_clock_getres_MONOTONIC);
static void BM_time_clock_getres_MONOTONIC_syscall(benchmark::State& state) {
timespec t;
while (state.KeepRunning()) {
syscall(__NR_clock_getres, CLOCK_MONOTONIC, &t);
}
}
BENCHMARK(BM_time_clock_getres_MONOTONIC_syscall);
static void BM_time_time(benchmark::State& state) {
while (state.KeepRunning()) {
time_t now;
now = time(&now);
}
}
BENCHMARK(BM_time_time);
/* /*
* Measure the time it takes to submit the android logging data to pstore * Measure the time it takes to submit the android logging data to pstore
*/ */