Use sub-devices count when calculating globalMemCacheSize

Signed-off-by: Filip Hazubski <[email protected]>

Author: fhazubski-Intel

opencl/source/cl_device/cl_device_caps.cpp

@@ -287,7 +287,8 @@ void ClDevice::initializeCaps() {
     //copy system info to prevent misaligned reads
     const auto systemInfo = hwInfo.gtSystemInfo;
 
-    deviceInfo.globalMemCacheSize = systemInfo.L3CacheSizeInKb * KB;
+    const auto subDevicesCount = std::max(getNumGenericSubDevices(), 1u);
+    deviceInfo.globalMemCacheSize = systemInfo.L3CacheSizeInKb * KB * subDevicesCount;
     deviceInfo.grfSize = hwInfo.capabilityTable.grfSize;
 
     deviceInfo.globalMemCacheType = CL_READ_WRITE_CACHE;
@@ -302,7 +303,7 @@ void ClDevice::initializeCaps() {
 
     deviceInfo.maxWorkItemDimensions = 3;
 
-    deviceInfo.maxComputUnits = systemInfo.EUCount * std::max(getNumGenericSubDevices(), 1u);
+    deviceInfo.maxComputUnits = systemInfo.EUCount * subDevicesCount;
     if (device.isEngineInstanced()) {
         deviceInfo.maxComputUnits /= systemInfo.CCSInfo.NumberOfCCSEnabled;
     }

opencl/test/unit_test/device/device_caps_tests.cpp

@@ -1545,3 +1545,17 @@ HWTEST_F(DeviceGetCapsTest, givenDSSCountEqualZeroWhenDeviceCreatedThenMaxEuPerD
 
     EXPECT_EQ(device->sharedDeviceInfo.maxNumEUsPerSubSlice, device->sharedDeviceInfo.maxNumEUsPerDualSubSlice);
 }
+
+TEST_F(DeviceGetCapsTest, givenRootDeviceWithSubDevicesWhenQueriedForCacheSizeThenValueIsMultiplied) {
+    UltClDeviceFactory deviceFactory{1, 0};
+    auto singleRootDeviceCacheSize = deviceFactory.rootDevices[0]->deviceInfo.globalMemCacheSize;
+
+    for (uint32_t subDevicesCount : {2, 3, 4}) {
+        UltClDeviceFactory deviceFactory{1, subDevicesCount};
+        auto rootDeviceCacheSize = deviceFactory.rootDevices[0]->deviceInfo.globalMemCacheSize;
+        for (auto &subDevice : deviceFactory.rootDevices[0]->subDevices) {
+            EXPECT_EQ(singleRootDeviceCacheSize, subDevice->getDeviceInfo().globalMemCacheSize);
+            EXPECT_EQ(rootDeviceCacheSize, subDevice->getDeviceInfo().globalMemCacheSize * subDevicesCount);
+        }
+    }
+}