[UR][L0] Fix Multi Device Event Cache for shared Root Device

[nrspruit]

pre-commit PR for oneapi-src/unified-runtime#1667

[nrspruit]

There is something wrong in the group of commits in between my commit and the previous intel/llvm because with just my patch, the failing test passes:

C:\Users\nrspruit\sycl_workspace\llvm\build\bin>root_group.exe

C:\Users\nrspruit\sycl_workspace\llvm\build\bin>echo %errorlevel%
0

C:\Users\nrspruit\sycl_workspace\llvm\build\bin>git diff

C:\Users\nrspruit\sycl_workspace\llvm\build\bin>cd .._deps\unified-runtime-level_zero-src

C:\Users\nrspruit\sycl_workspace\llvm\build\_deps\unified-runtime-level_zero-src>git diff
diff --git a/source/adapters/level_zero/event.cpp b/source/adapters/level_zero/event.cpp
index d9135334..20ca6b0f 100644
--- a/source/adapters/level_zero/event.cpp
+++ b/source/adapters/level_zero/event.cpp
@@ -1500,7 +1500,20 @@ ur_result_t _ur_ze_event_list_t::createAndRetainUrZeEventList(

         std::shared_lock<ur_shared_mutex> Lock(EventList[I]->Mutex);

-        if (Queue && Queue->Device != CurQueueDevice &&
+        ur_device_handle_t QueueRootDevice;
+        ur_device_handle_t CurrentQueueRootDevice;
+        if (Queue) {
+          QueueRootDevice = Queue->Device;
+          CurrentQueueRootDevice = CurQueueDevice;
+          if (Queue->Device->isSubDevice()) {
+            QueueRootDevice = Queue->Device->RootDevice;
+          }
+          if (CurQueueDevice->isSubDevice()) {
+            CurrentQueueRootDevice = CurQueueDevice->RootDevice;
+          }
+        }
+
+        if (Queue && QueueRootDevice != CurrentQueueRootDevice &&
             !EventList[I]->IsMultiDevice) {
           ze_event_handle_t MultiDeviceZeEvent = nullptr;
           ur_event_handle_t MultiDeviceEvent;

C:\Users\nrspruit\sycl_workspace\llvm\build_deps\unified-runtime-level_zero-src>

If I use my change rebased onto latest unified-runtime, the error occurs ie:

C:\Users\nrspruit\sycl_workspace\llvm\build\bin>root_group.exe
Assertion failed: testResults[i], file root_group.cpp, line 112

[nrspruit]

After oneapi-src/unified-runtime#1581 has been merged, root_group test will only pass on windows when #13653 is merged. Until then, the root_group e2e test will fail.

[kbenzie]

@intel/llvm-gatekeepers please merge