@@ -75,6 +75,7 @@ static void touch(void)
static void start_thread_on(void *(*fn)(void *), void *arg, unsigned long cpu)
{
+ int rc;
pthread_t tid;
cpu_set_t cpuset;
pthread_attr_t attr;
@@ -82,14 +83,23 @@ static void start_thread_on(void *(*fn)(void *), void *arg, unsigned long cpu)
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
- pthread_attr_init(&attr);
+ rc = pthread_attr_init(&attr);
+ if (rc) {
+ errno = rc;
+ perror("pthread_attr_init");
+ exit(1);
+ }
- if (pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpuset)) {
+ rc = pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpuset);
+ if (rc) {
+ errno = rc;
perror("pthread_attr_setaffinity_np");
exit(1);
}
- if (pthread_create(&tid, &attr, fn, arg)) {
+ rc = pthread_create(&tid, &attr, fn, arg);
+ if (rc) {
+ errno = rc;
perror("pthread_create");
exit(1);
}
Turns out pthreads returns an errno and doesn't set errno. This doesn't play well with perror(). Signed-off-by: Cyril Bur <cyrilbur@gmail.com> --- .../selftests/powerpc/benchmarks/context_switch.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)