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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <benchmark/benchmark.h>
#include "util.h"
template <typename Fn>
void ReadWriteTest(benchmark::State& state, Fn f, bool buffered) {
size_t chunk_size = state.range(0);
FILE* fp = fopen("/dev/zero", "rw");
__fsetlocking(fp, FSETLOCKING_BYCALLER);
char* buf = new char[chunk_size];
if (!buffered) {
setvbuf(fp, 0, _IONBF, 0);
}
while (state.KeepRunning()) {
f(buf, chunk_size, 1, fp);
}
state.SetBytesProcessed(int64_t(state.iterations()) * int64_t(chunk_size));
delete[] buf;
fclose(fp);
}
void BM_stdio_fread(benchmark::State& state) {
ReadWriteTest(state, fread, true);
}
BIONIC_BENCHMARK(BM_stdio_fread);
void BM_stdio_fwrite(benchmark::State& state) {
ReadWriteTest(state, fwrite, true);
}
BIONIC_BENCHMARK(BM_stdio_fwrite);
void BM_stdio_fread_unbuffered(benchmark::State& state) {
ReadWriteTest(state, fread, false);
}
BIONIC_BENCHMARK(BM_stdio_fread_unbuffered);
void BM_stdio_fwrite_unbuffered(benchmark::State& state) {
ReadWriteTest(state, fwrite, false);
}
BIONIC_BENCHMARK(BM_stdio_fwrite_unbuffered);
static void FopenFgetsFclose(benchmark::State& state, bool no_locking) {
char buf[1024];
while (state.KeepRunning()) {
FILE* fp = fopen("/proc/version", "re");
if (no_locking) __fsetlocking(fp, FSETLOCKING_BYCALLER);
if (fgets(buf, sizeof(buf), fp) == nullptr) abort();
fclose(fp);
}
}
static void BM_stdio_fopen_fgets_fclose_locking(benchmark::State& state) {
FopenFgetsFclose(state, false);
}
BIONIC_BENCHMARK(BM_stdio_fopen_fgets_fclose_locking);
void BM_stdio_fopen_fgets_fclose_no_locking(benchmark::State& state) {
FopenFgetsFclose(state, true);
}
BIONIC_BENCHMARK(BM_stdio_fopen_fgets_fclose_no_locking);
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