Hi,
I am observing GPU kernel is taking huge time when I am running an empty kernel. I am Using "Samsung Exynos Octa 5420 Board" which has Mali GPU. I have one kernel which is of work group size around "3000" when I am running it with logic inside kernel and passing arguments, it is taking 2 msec of time but when I run the same kernel without any logic in it and without passing any arguments it is taking 19 msec. What I heard is kernel with less load for will run very fast, but why kernel without any load is taking huge time? For answering this query just consider my logic of kernel as a simple factorial of NxN elements. I hope I gave complete information related my problem, please let me know any more information you need to solve this.
Thanks & Regards,
Narendra Kumar Chepuri.
Hi Chris.
I will agree with your statement but I am measuring time with start time before EnqueueNDRangeKernel and end time is after cl_flush and cl_finish which are blocking calls and confirms that kernel is executed completely.
Narendra Kumar.