testsuite/systemtap.base/gtod.c


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#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <unistd.h>

int main (int argc, char *argv[])
{
	int i;
	struct timeval tv[100][2];
	int us = 0;
	if (argc == 2) us = atoi(argv[1]);
	for (i=0; i<100; i++) {
		gettimeofday(&tv[i][0], NULL);
		setsid();
		gettimeofday(&tv[i][1], NULL);
		if (us) usleep(us);
	}
	for (i=0; i<100; i++) {
		// change last 4 chars for correctly sorting even if the
		// time stamps are completely same.
		printf("%8d%06d :%02d appl\n", tv[i][0].tv_sec, tv[i][0].tv_usec, i);
		printf("%8d%06d :%02d prog\n", tv[i][1].tv_sec, tv[i][1].tv_usec, i);
	}
	return 0;
}