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/*
* Copyright (C) 2012 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 "benchmark.h"
#include <string.h>
#define KB 1024
#define MB 1024*KB
#define AT_COMMON_SIZES \
Arg(8)->Arg(64)->Arg(512)->Arg(1*KB)->Arg(8*KB)->Arg(16*KB)->Arg(32*KB)->Arg(64*KB)
// TODO: test unaligned operation too? (currently everything will be 8-byte aligned by malloc.)
static void BM_string_memcmp(int iters, int nbytes) {
StopBenchmarkTiming();
char* src = new char[nbytes]; char* dst = new char[nbytes];
memset(src, 'x', nbytes);
memset(dst, 'x', nbytes);
StartBenchmarkTiming();
volatile int c __attribute__((unused)) = 0;
for (int i = 0; i < iters; ++i) {
c += memcmp(dst, src, nbytes);
}
StopBenchmarkTiming();
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] src;
delete[] dst;
}
BENCHMARK(BM_string_memcmp)->AT_COMMON_SIZES;
static void BM_string_memcpy(int iters, int nbytes) {
StopBenchmarkTiming();
char* src = new char[nbytes]; char* dst = new char[nbytes];
memset(src, 'x', nbytes);
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
memcpy(dst, src, nbytes);
}
StopBenchmarkTiming();
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] src;
delete[] dst;
}
BENCHMARK(BM_string_memcpy)->AT_COMMON_SIZES;
static void BM_string_memmove(int iters, int nbytes) {
StopBenchmarkTiming();
char* buf = new char[nbytes + 64];
memset(buf, 'x', nbytes + 64);
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
memmove(buf, buf + 1, nbytes); // Worst-case overlap.
}
StopBenchmarkTiming();
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] buf;
}
BENCHMARK(BM_string_memmove)->AT_COMMON_SIZES;
static void BM_string_memset(int iters, int nbytes) {
StopBenchmarkTiming();
char* dst = new char[nbytes];
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
memset(dst, 0, nbytes);
}
StopBenchmarkTiming();
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] dst;
}
BENCHMARK(BM_string_memset)->AT_COMMON_SIZES;
static void BM_string_strlen(int iters, int nbytes) {
StopBenchmarkTiming();
char* s = new char[nbytes];
memset(s, 'x', nbytes);
s[nbytes - 1] = 0;
StartBenchmarkTiming();
volatile int c __attribute__((unused)) = 0;
for (int i = 0; i < iters; ++i) {
c += strlen(s);
}
StopBenchmarkTiming();
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] s;
}
BENCHMARK(BM_string_strlen)->AT_COMMON_SIZES;
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