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#include <stdbool.h>
#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
/* Cycle between a bunch of different messages, to avoid performance
* variations due to memory effects of a particular allocation pattern. */
#ifndef NUM_MESSAGES
#define NUM_MESSAGES 32
#endif
static bool initialize();
static void cleanup();
static size_t run(int i);
int main (int argc, char *argv[])
{
(void)argc;
/* Change cwd to where the binary is. */
char *lastslash = strrchr(argv[0], '/');
char *progname = argv[0];
if(lastslash) {
*lastslash = '\0';
chdir(argv[0]);
*lastslash = '/';
progname = lastslash + 3; /* "/b_" */
}
if(!initialize()) {
fprintf(stderr, "%s: failed to initialize\n", argv[0]);
return 1;
}
size_t total_bytes = 0;
clock_t before = clock();
for(int i = 0; true; i++) {
if((i & 0xFF) == 0 && (clock() - before > CLOCKS_PER_SEC)) break;
size_t bytes = run(i);
if(bytes == 0) {
fprintf(stderr, "%s: failed.\n", argv[0]);
return 2;
}
total_bytes += bytes;
}
double elapsed = ((double)clock() - before) / CLOCKS_PER_SEC;
printf("%s:%d\n", progname, (int)(total_bytes / elapsed / (1 << 20)));
cleanup();
return 0;
}
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