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SWDEV-79278 - [OCL][PAL] use HwPipeBottom to query the start time of an event. The reason is that if there are many dispatches run in a loop with profiling enabled, then it is possible that the HwPipeStart of an event can occur before the HwPipeBottom of the previous dispatch and this will affect the timing reported by profiling. ReviewBoardURL = http://ocltc.amd.com/reviews/r/13242/diff/1/ Affected files ... ... //depot/stg/opencl/drivers/opencl/runtime/device/pal/paltimestamp.cpp#3 edit