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strongswan/scripts/malloc_speed.c

85 lines
2.0 KiB

/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 revosec aG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdio.h>
#include <time.h>
#include <library.h>
#include <utils/debug.h>
#ifdef HAVE_MALLINFO
#include <malloc.h>
#endif /* HAVE_MALLINFO */
static void start_timing(struct timespec *start)
{
clock_gettime(CLOCK_THREAD_CPUTIME_ID, start);
}
static double end_timing(struct timespec *start)
{
struct timespec end;
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &end);
return (end.tv_nsec - start->tv_nsec) / 1000000000.0 +
(end.tv_sec - start->tv_sec) * 1.0;
}
static void print_mallinfo()
{
#ifdef HAVE_MALLINFO
struct mallinfo mi = mallinfo();
printf("malloc: sbrk %d, mmap %d, used %d, free %d\n",
mi.arena, mi.hblkhd, mi.uordblks, mi.fordblks);
#endif /* HAVE_MALLINFO */
}
#define ALLOCS 1024
#define ROUNDS 2048
int main(int argc, char *argv[])
{
struct timespec timing;
int i, round;
void *m[ALLOCS];
/* a random set of allocations we test */
int sizes[16] = { 1, 13, 100, 1000, 16, 10000, 50, 17,
123, 32, 8, 64, 8096, 1024, 123, 9 };
library_init(NULL, "malloc_speed");
atexit(library_deinit);
print_mallinfo();
start_timing(&timing);
for (round = 0; round < ROUNDS; round++)
{
for (i = 0; i < ALLOCS; i++)
{
m[i] = malloc(sizes[(round + i) % countof(sizes)]);
}
for (i = 0; i < ALLOCS; i++)
{
free(m[i]);
}
}
printf("time for %d malloc/frees, repeating %d rounds: %.4fs\n",
ALLOCS, ROUNDS, end_timing(&timing));
print_mallinfo();
return 0;
}