performance(debugger): optimize ATT event handling

- check threads with attention state before reading SR_IDENT
- memory read is costly, for threads already in stopped state
there is no need to read sr_ident and check thread state again
- single stepping one thread performance is substantially improved,
by the factor of 6x

Related-To: NEO-8183

Signed-off-by: Mateusz Hoppe <mateusz.hoppe@intel.com>

level_zero/tools/source/debug/debug_session_imp.cpp

@@ -1393,4 +1393,21 @@ ze_result_t DebugSessionImp::waitForCmdReady(EuThread::ThreadId threadId, uint16
     return ZE_RESULT_SUCCESS;
 }
 
+void DebugSessionImp::getNotStoppedThreads(const std::vector<EuThread::ThreadId> &threadsWithAtt, std::vector<EuThread::ThreadId> &notStoppedThreads) {
+    for (const auto &threadId : threadsWithAtt) {
+
+        bool wasStopped = false;
+
+        if (tileSessionsEnabled) {
+            wasStopped = tileSessions[threadId.tileIndex].first->allThreads[threadId]->isStopped();
+        } else {
+            wasStopped = allThreads[threadId]->isStopped();
+        }
+
+        if (!wasStopped) {
+            notStoppedThreads.push_back(threadId);
+        }
+    }
+}
+
 } // namespace L0