[L0] Add UR_L0_OOQ_INTEGRATED_SIGNAL_EVENT to toggle event usage

Signed-off-by: Neil R. Spruit <[email protected]>

Author: nrspruit

source/adapters/level_zero/common.hpp

@@ -241,6 +241,17 @@ static const uint32_t UrL0QueueSyncNonBlocking = [] {
   return L0QueueSyncLockingModeValue;
 }();
 
+static const uint32_t UrL0OutOfOrderIntegratedSignalEvent = [] {
+  const char *UrL0OutOfOrderIntegratedSignalEventEnv =
+      std::getenv("UR_L0_OOQ_INTEGRATED_SIGNAL_EVENT");
+  uint32_t UrL0OutOfOrderIntegratedSignalEventValue = 0;
+  if (UrL0OutOfOrderIntegratedSignalEventEnv) {
+    UrL0OutOfOrderIntegratedSignalEventValue =
+        std::atoi(UrL0OutOfOrderIntegratedSignalEventEnv);
+  }
+  return UrL0OutOfOrderIntegratedSignalEventValue;
+}();
+
 // This class encapsulates actions taken along with a call to Level Zero API.
 class ZeCall {
 private:

source/adapters/level_zero/context.cpp

@@ -658,7 +658,8 @@ ur_result_t ur_context_handle_t_::getAvailableCommandList(
   if (Queue->hasOpenCommandList(UseCopyEngine)) {
     if (AllowBatching) {
       bool batchingAllowed = true;
-      if (Queue->Device->isIntegrated()) {
+      if (Queue->Device->isIntegrated() &&
+          !UrL0OutOfOrderIntegratedSignalEvent) {
         batchingAllowed = eventCanBeBatched(Queue, UseCopyEngine,
                                             NumEventsInWaitList, EventWaitList);
       }

source/adapters/level_zero/queue.cpp

@@ -1766,7 +1766,8 @@ ur_result_t setSignalEvent(ur_queue_handle_t Queue, bool UseCopyEngine,
   if (Queue->Device->isIntegrated() &&
       eventCanBeBatched(Queue, UseCopyEngine, NumEventsInWaitList,
                         EventWaitList) &&
-      !Queue->isInOrderQueue() && !Queue->UsingImmCmdLists) {
+      !Queue->isInOrderQueue() && !Queue->UsingImmCmdLists &&
+      !UrL0OutOfOrderIntegratedSignalEvent) {
     ZeEvent = nullptr;
     (*Event)->IsInnerBatchedEvent = true;
   } else {