Yet another threading tool regression test scheduler sensitivity fix

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11934

helgrind/tests/tc01_simple_race.c

@@ -17,13 +17,13 @@ void* child_fn ( void* arg )
 
 int main ( void )
 {
+   const struct timespec delay = { 0, 100 * 1000 * 1000 };
    pthread_t child;
-
    if (pthread_create(&child, NULL, child_fn, NULL)) {
       perror("pthread_create");
       exit(1);
    }
-
+   nanosleep(&delay, 0);
    /* Unprotected relative to child */
    x++;