disable scheduler scaling until all threads are created

ponylang · Dec 4, 2024 · 8d32e15 · 8d32e15
1 parent a71a1fa
commit 8d32e15
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/libponyrt/sched/scheduler.c b/src/libponyrt/sched/scheduler.c
@@ -1325,6 +1325,9 @@ bool ponyint_sched_start(bool library)
 
   atomic_store_explicit(&detect_quiescence, !library, memory_order_relaxed);
 
+  // disable dynamic scheduler scaling for startup until all threads are created
+  atomic_store_explicit(&temporarily_disable_scheduler_scaling, true, memory_order_relaxed);
+
   DTRACE0(RT_START);
   uint32_t start = 0;
 
@@ -1341,6 +1344,9 @@ bool ponyint_sched_start(bool library)
       return false;
   }
 
+  // enable dynamic scheduler scaling after all threads have been created
+  atomic_store_explicit(&temporarily_disable_scheduler_scaling, false, memory_order_relaxed);
+
 #if defined(USE_SYSTEMATIC_TESTING)
   // start processing
   SYSTEMATIC_TESTING_START(scheduler, ponyint_asio_get_backend_tid(), ponyint_asio_get_backend_sleep_object());