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lws: Fix spurious sleep in simgrid mode

If we fail to steal another worker because it is busy, we have to make sure
to come back trying to steal again, otherwise we would got to sleep and
possibly never wake up again.
Samuel Thibault 4 年之前
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8774c8486c
共有 1 個文件被更改,包括 5 次插入0 次删除
  1. 5 0
      src/sched_policies/work_stealing_policy.c

+ 5 - 0
src/sched_policies/work_stealing_policy.c

@@ -610,6 +610,11 @@ static struct starpu_task *ws_pop_task(unsigned sched_ctx_id)
 	if (_starpu_worker_trylock(victim))
 	{
 		/* victim is busy, don't bother it, come back later */
+#ifdef STARPU_SIMGRID
+		starpu_sleep(0.000001);
+		/* Make sure we come back and not block */
+		starpu_wake_worker_no_relax(workerid);
+#endif
 		return NULL;
 	}
 	if (ws->per_worker[victim].running && ws->per_worker[victim].queue.ntasks > 0)