feature: debug flag to control direct submission semaphore mode

Related-To: HSD-18039521047

Signed-off-by: Bartosz Dunajski <[email protected]>

Author: BartoszDunajski

shared/source/debug_settings/debug_variables_base.inl

@@ -437,6 +437,7 @@ DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionRelaxedOrderingQueueSizeLimit, -
 DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionRelaxedOrderingMinNumberOfClients, -1, "-1: default, >0: Enables RelaxedOrdering mode only if specified number of clients is assigned to given CSR.")
 DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionMonitorFenceInputPolicy, -1, "-1: default, 0: stalling command flag, 1: explicit monitor fence flag. Selects policy to dispatch monitor fence upon input flag, either for every stalling command or explicit motor fence dispatch")
 DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionPrintSemaphoreUsage, -1, "-1: default, 0: disabled, 1: enabled. If set, print DirectSubmission semaphore programming and unlocking")
+DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionSwitchSemaphoreMode, -1, "-1: default, 1: enable switch on unsuccessful, 0: disable switch on unsuccessful")
 DECLARE_DEBUG_VARIABLE(bool, DirectSubmissionPrintBuffers, false, "Print address of submitted command buffers")
 DECLARE_DEBUG_VARIABLE(int32_t, WaitForPagingFenceInController, -1, "Instead of waiting for paging fence on user thread, program additional semaphore which will be signaled by direct submission controller when paging fence reaches required value -1: default, 0 - disable, 1 - enable.")
 

shared/source/direct_submission/direct_submission_hw.inl

@@ -567,10 +567,16 @@ inline void DirectSubmissionHw<GfxFamily, Dispatcher>::dispatchSemaphoreSection(
     if (this->relaxedOrderingEnabled && this->relaxedOrderingSchedulerRequired) {
         dispatchRelaxedOrderingSchedulerSection(value);
     } else {
+        bool switchOnUnsuccessful = false;
+
+        if (debugManager.flags.DirectSubmissionSwitchSemaphoreMode.get() != -1) {
+            switchOnUnsuccessful = !!debugManager.flags.DirectSubmissionSwitchSemaphoreMode.get();
+        }
+
         EncodeSemaphore<GfxFamily>::addMiSemaphoreWaitCommand(ringCommandStream,
                                                               semaphoreGpuVa,
                                                               value,
-                                                              COMPARE_OPERATION::COMPARE_OPERATION_SAD_GREATER_THAN_OR_EQUAL_SDD, false, false, false, false, nullptr);
+                                                              COMPARE_OPERATION::COMPARE_OPERATION_SAD_GREATER_THAN_OR_EQUAL_SDD, false, false, false, switchOnUnsuccessful, nullptr);
     }
 
     if (miMemFenceRequired) {

shared/test/common/test_files/igdrcl.config

@@ -626,4 +626,5 @@ DirectSubmissionPrintSemaphoreUsage = -1
 ForceNonCoherentModeForTimestamps = 0
 ExperimentalUSMAllocationReuseVersion = -1
 ForceNonWalkerSplitMemoryCopy = -1
+DirectSubmissionSwitchSemaphoreMode = -1
 # Please don't edit below this line