kselftest/arm64: Ensure stable names for GCS stress test results
authorMark Brown <broonie@kernel.org>
Fri, 11 Oct 2024 14:36:25 +0000 (15:36 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Wed, 16 Oct 2024 14:54:19 +0000 (15:54 +0100)
The GCS stress test program currently uses the PID of the threads it
creates in the test names it reports, resulting in unstable test names
between runs. Fix this by using a thread number instead.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20241011-arm64-gcs-stress-stable-name-v1-1-4950f226218e@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
tools/testing/selftests/arm64/gcs/gcs-stress.c

index bdec7ee..03222c3 100644 (file)
@@ -56,7 +56,7 @@ static int num_processors(void)
        return nproc;
 }
 
-static void start_thread(struct child_data *child)
+static void start_thread(struct child_data *child, int id)
 {
        int ret, pipefd[2], i;
        struct epoll_event ev;
@@ -132,7 +132,7 @@ static void start_thread(struct child_data *child)
                ev.events = EPOLLIN | EPOLLHUP;
                ev.data.ptr = child;
 
-               ret = asprintf(&child->name, "Thread-%d", child->pid);
+               ret = asprintf(&child->name, "Thread-%d", id);
                if (ret == -1)
                        ksft_exit_fail_msg("asprintf() failed\n");
 
@@ -437,7 +437,7 @@ int main(int argc, char **argv)
                                   tests);
 
        for (i = 0; i < gcs_threads; i++)
-               start_thread(&children[i]);
+               start_thread(&children[i], i);
 
        /*
         * All children started, close the startup pipe and let them