Attachment 299179 Details for Bug 438975 – Test program from bz 245761; 245761 is not visible by all bugzilla accts...

Test program from bz 245761; 245761 is not visible by all bugzilla accts...

clocktest.tar (text/plain), 10.00 KB, created by Don Dutile (Red Hat) on 2008-03-26 15:37:25 UTC

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Creator: Don Dutile (Red Hat)

Created: 2008-03-26 15:37:25 UTC

Size: 10.00 KB

patch

obsolete

>clocktest/0000775000076400007640000000000010655644241011542 5ustar  rielrielclocktest/Makefile0000644000076400007640000000010410655643616013200 0ustar  rielriel
>clocktest: clocktest.c
>	cc -o clocktest clocktest.c -lpthread -lrt
>clocktest/clocktest.c0000644000076400007640000000403110655644065013701 0ustar  rielriel#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <time.h>
>#include <pthread.h>
>
>
>struct timedata_tag {
>	pthread_t tid;
>	struct timespec tsp;
>};
>
>struct timedata_tag predata;
>
>pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
>
>void *sub(void *p)
>{
>	pthread_t mytid;
>	struct timespec tsp;
>	struct timespec ptsp;
>	int count;
>	int loop;
>
>	count = 0;
>	loop = 1;
>	mytid = pthread_self();
>	printf("thread %d start\n", mytid);
>
>	for ( ; ; ) {
>		pthread_mutex_lock(&lock);
>		clock_gettime(CLOCK_MONOTONIC, &ptsp);
>		for ( ; ; ) {
>			clock_gettime(CLOCK_MONOTONIC, &tsp);
>			if ( ptsp.tv_nsec != tsp.tv_nsec )
>				break;
>		}
>		if (
>			( tsp.tv_sec < predata.tsp.tv_sec ) ||
>			( ( tsp.tv_sec == predata.tsp.tv_sec ) &&
>				( tsp.tv_nsec <= predata.tsp.tv_nsec ) )
>		) {
>			printf("time error\n");
>			printf("=== predata ===\n");
>			printf("  thread id : %d\n", predata.tid);
>			printf("  tv_sec    : 0x%08x\n", predata.tsp.tv_sec);
>			printf("  tv_nsec   : 0x%08x\n", predata.tsp.tv_nsec);
>			printf("=== my data ===\n");
>			printf("  thread id : %d\n", mytid);
>			printf("  tv_sec    : 0x%08x\n", tsp.tv_sec);
>			printf("  tv_nsec   : 0x%08x\n", tsp.tv_nsec);
>			exit(1);
>		}
>		predata.tid = mytid;
>		predata.tsp = tsp;
>		pthread_mutex_unlock(&lock);
>#if 0
>		++count;
>		if ( count == 100000 ) {
>			printf("%d times done ... at thread %d\n", loop * count, mytid);
>			++loop;
>			count = 0;
>		}
>#endif
>	}
>
>	return 0;
>}
>
>int main(int ac, char **av)
>{
>	int r;
>	pthread_t child;
>	pthread_attr_t attr;
>	int n;
>	int i;
>
>	if ( ac >= 2 ) {
>		n = atoi(av[1]);
>	} else {
>		n = 2;
>	}
>	printf("create %d threads\n", n);
>
>	r = sysconf(_SC_MONOTONIC_CLOCK);
>	printf("sysconf(_SC_MONOTONIC_CLOCK) = %d\n", r);
>
>	if ( r == 0 ) {
>		printf("no monotonic clock\n");
>		exit(1);
>	}
>
>	predata.tid = pthread_self();
>	clock_gettime(CLOCK_MONOTONIC, &predata.tsp);
>
>	for ( i = 0; i < n; ++i ) {
>		pthread_attr_init(&attr);
>		r = pthread_create(&child, &attr, sub, 0);
>		if ( r != 0 ) {
>			printf("pthread_create error %d\n", r);
>			exit(1);
>		}
>	}
>
>	for ( ; ; )
>		sleep(100);
>
>	return 0;
>}
>

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