Do not limit to 1 slice for throttle hint low.

Change-Id: Id42f2ba3af752d36dcf4c550129c4cf1aa68c530
Signed-off-by: Mrozek, Michal <michal.mrozek@intel.com>

Author: MichalMrozek

runtime/os_interface/windows/wddm_device_command_stream.inl

@@ -82,8 +82,6 @@ FlushStamp WddmCommandStreamReceiver<GfxFamily>::flush(BatchBuffer &batchBuffer,
     const uint32_t maxRequestedSubsliceCount = 7;
     switch (batchBuffer.throttle) {
     case QueueThrottle::LOW:
-        pHeader->UmdRequestedSubsliceCount = 1;
-        break;
     case QueueThrottle::MEDIUM:
         pHeader->UmdRequestedSubsliceCount = 0;
         break;

unit_tests/os_interface/windows/device_command_stream_tests.cpp

@@ -325,7 +325,7 @@ TEST_F(WddmCommandStreamTest, givenWdmmWhenSubmitIsCalledAndThrottleIsToLowThenS
     COMMAND_BUFFER_HEADER *pHeader = reinterpret_cast<COMMAND_BUFFER_HEADER *>(commandHeader);
 
     EXPECT_EQ(0, pHeader->UmdRequestedSliceState);
-    EXPECT_EQ(1, pHeader->UmdRequestedSubsliceCount);
+    EXPECT_EQ(0, pHeader->UmdRequestedSubsliceCount);
     EXPECT_EQ(wddm->getGtSysInfo()->EUCount / wddm->getGtSysInfo()->SubSliceCount, pHeader->UmdRequestedEUCount);
 
     memoryManager->freeGraphicsMemory(commandBuffer);