Remove unnecessary flush in event profiling

Remove flush before appending appendWriteKernelTimestamp, since
the associated PC is only to ensure kernel execution has completed
in the device, so flush to the host is not required.

Signed-off-by: Jaime Arteaga <[email protected]>

Author: Jaime Arteaga

level_zero/core/source/cmdlist/cmdlist_hw.inl

@@ -1523,7 +1523,6 @@ void CommandListCoreFamily<gfxCoreFamily>::appendEventForProfiling(ze_event_hand
         } else {
 
             NEO::PipeControlArgs args = {};
-            args.dcFlushEnable = true;
 
             NEO::MemorySynchronizationCommands<GfxFamily>::addPipeControl(*commandContainer.getCommandStream(), args);
             appendWriteKernelTimestamp(hEvent, beforeWalker, true);

level_zero/core/test/unit_tests/sources/cmdlist/test_cmdlist_append_launch_kernel.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 Intel Corporation
+ * Copyright (C) 2020-2021 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
@@ -337,7 +337,7 @@ HWTEST2_F(CommandListAppendLaunchKernel, givenTimestampEventsWhenAppendingKernel
     {
         auto cmd = genCmdCast<PIPE_CONTROL *>(*itor);
         EXPECT_TRUE(cmd->getCommandStreamerStallEnable());
-        EXPECT_TRUE(cmd->getDcFlushEnable());
+        EXPECT_FALSE(cmd->getDcFlushEnable());
     }
     itor++;