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Add benchmarking code.

This commit is contained in:
Davi de Castro Reis 2011-01-24 10:29:22 -02:00
parent 799b4a3fc5
commit 2a35666bfa
3 changed files with 124 additions and 0 deletions

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@ -23,6 +23,7 @@ libcmph_la_SOURCES = hash.h hash.c \
select.h select.c select_lookup_tables.h \ select.h select.c select_lookup_tables.h \
compressed_seq.h compressed_seq.c \ compressed_seq.h compressed_seq.c \
compressed_rank.h compressed_rank.c \ compressed_rank.h compressed_rank.c \
cmph_benchmark.h cmph_benchmark.cc \
cmph_time.h cmph_time.h
libcmph_la_LDFLAGS = -version-info 0:0:0 libcmph_la_LDFLAGS = -version-info 0:0:0

103
src/cmph_benchmark.c Normal file
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@ -0,0 +1,103 @@
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "cmph_benchmark.h"
typedef struct {
const char* name;
void (*func)(int);
struct rusage begin;
struct rusage end;
} benchmark_t;
static benchmark_t* global_benchmarks = NULL;
/* Subtract the `struct timeval' values X and Y,
storing the result in RESULT.
Return 1 if the difference is negative, otherwise 0. */
int timeval_subtract (
struct timeval *result, struct timeval *x, struct timeval* y) {
/* Perform the carry for the later subtraction by updating y. */
if (x->tv_usec < y->tv_usec) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/* Compute the time remaining to wait.
tv_usec is certainly positive. */
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
benchmark_t* find_benchmark(const char* name) {
benchmark_t* benchmark = global_benchmarks;
while (benchmark->name != NULL) if (strcmp(benchmark->name, name) != 0) break;
if (!benchmark->name) return NULL;
return benchmark;
}
int global_benchmarks_length() {
benchmark_t* benchmark;
int length = 0;
if (global_benchmarks == 0) return 0;
benchmark = global_benchmarks;
while (benchmark->name != NULL) ++length;
return length;
}
void bm_register(const char* name, void (*func)(int), int iters) {
benchmark_t benchmark;
int length = global_benchmarks_length();
benchmark.name = name;
benchmark.func = func;
assert(!find_benchmark(name));
global_benchmarks = realloc(global_benchmarks, length + 1);
global_benchmarks[length] = benchmark;
}
void bm_start(const char* name) {
benchmark_t* benchmark;
struct rusage rs;
benchmark = find_benchmark(name);
int ret = getrusage(RUSAGE_SELF, &rs);
if (ret != 0) {
perror("rusage failed");
exit(-1);
}
benchmark->begin = rs;
(*benchmark->func)(1);
}
void bm_end(const char* name) {
benchmark_t* benchmark;
struct rusage rs;
int ret = getrusage(RUSAGE_SELF, &rs);
if (ret != 0) {
perror("rusage failed");
exit(-1);
}
benchmark = find_benchmark(name);
benchmark->end = rs;
struct timeval utime;
timeval_subtract(&utime, &benchmark->end.ru_utime, &benchmark->begin.ru_utime);
struct timeval stime;
timeval_subtract(&stime, &benchmark->end.ru_stime, &benchmark->begin.ru_stime);
printf("User cpu time used: %ld.%6ld\n", utime.tv_sec, utime.tv_usec);
printf("System cpu time used: %ld.%6ld\n", stime.tv_sec, stime.tv_usec);
}

20
src/cmph_benchmark.h Normal file
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#ifndef __CMPH_BENCHMARK_H__
#define __CMPH_BENCHMARK_H__
#include <sys/time.h>
#include <sys/resource.h>
#ifdef __cplusplus
extern "C"
{
#endif
#define BM_REGISTER(func, iters) bm_register(##func, func, iters);
void bm_register(const char* name, void (*func)(int), int iters);
void run_benchmarks(int argc, char** argv);
#ifdef __cplusplus
}
#endif
#endif // __CMPH_BENCHMARK_H__