Debug flag to override profiling timer resolution

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

Author: BartoszDunajski

opencl/test/unit_test/device/device_caps_tests.cpp

@@ -306,6 +306,17 @@ TEST_F(DeviceGetCapsTest, givenDontForcePreemptionModeDebugVariableWhenCreateDev
     }
 }
 
+TEST_F(DeviceGetCapsTest, givenDebugFlagSetWhenCreatingDeviceInfoThenOverrideProfilingTimerResolution) {
+    DebugManagerStateRestore dbgRestorer;
+
+    DebugManager.flags.OverrideProfilingTimerResolution.set(123);
+
+    auto device = std::unique_ptr<Device>(MockDevice::createWithNewExecutionEnvironment<MockDevice>(defaultHwInfo.get()));
+
+    EXPECT_EQ(double(123), device->getDeviceInfo().profilingTimerResolution);
+    EXPECT_EQ(123u, device->getDeviceInfo().outProfilingTimerResolution);
+}
+
 TEST_F(DeviceGetCapsTest, givenForcePreemptionModeDebugVariableWhenCreateDeviceThenSetForcedMode) {
     DebugManagerStateRestore dbgRestorer;
     {

opencl/test/unit_test/test_files/igdrcl.config

@@ -207,4 +207,5 @@ PrintBlitDispatchDetails = 0
 EnableMockSourceLevelDebugger = 0
 EnableHostPointerImport = -1
 EnableHostUsmSupport = -1
-ForceBtpPrefetchMode = -1
+ForceBtpPrefetchMode = -1
+OverrideProfilingTimerResolution = -1

shared/source/debug_settings/debug_variables_base.inl

@@ -85,6 +85,7 @@ DECLARE_DEBUG_VARIABLE(int32_t, MediaVfeStateMaxSubSlices, -1, ">=0: Programs Me
 DECLARE_DEBUG_VARIABLE(int32_t, EnableMockSourceLevelDebugger, 0, "Switches driver to mode with active debugger. Active modes: 1: opt-disabled, 2: opt-enabled")
 DECLARE_DEBUG_VARIABLE(int32_t, ForceBtpPrefetchMode, -1, "-1: default, 0: disable, 1: enable, Enables Btp prefetching")
 DECLARE_DEBUG_VARIABLE(int32_t, EnableHostPointerImport, -1, "-1: default - disabled, 0: disabled, 1: enabled, Experimental implementation to import Host Pointer into L0")
+DECLARE_DEBUG_VARIABLE(int32_t, OverrideProfilingTimerResolution, -1, "-1: default - disabled, 0<=: Override deviceInfo.profilingTimerResolution")
 
 /*LOGGING FLAGS*/
 DECLARE_DEBUG_VARIABLE(int32_t, PrintDriverDiagnostics, -1, "prints driver diagnostics messages to standard output, value corresponds to hint level")

shared/source/device/device_caps.cpp

@@ -69,6 +69,10 @@ void Device::initializeCaps() {
     deviceInfo.maxMemAllocSize = std::min(std::max(deviceInfo.maxMemAllocSize / 2, static_cast<uint64_t>(128llu * MB)), this->hardwareCapabilities.maxMemAllocSize);
 
     deviceInfo.profilingTimerResolution = getProfilingTimerResolution();
+    if (DebugManager.flags.OverrideProfilingTimerResolution.get() != -1) {
+        deviceInfo.profilingTimerResolution = static_cast<double>(DebugManager.flags.OverrideProfilingTimerResolution.get());
+    }
+
     deviceInfo.outProfilingTimerResolution = static_cast<size_t>(deviceInfo.profilingTimerResolution);
 
     constexpr uint64_t maxPixelSize = 16;