topic high cpu usage on module libigdrcl in OpenCL* for CPU

high cpu usage on module libigdrcl

Fan_Z_2 — Fri, 11 Mar 2016 04:17:30 GMT

Hi,

After running some performance tests on VtuneAMP and VisiualStudio performance Analyzer, they both showed that the module libigdrcl took a lot of CPU usage.Is this module the opencl driver library? looks like every opencl enqueue API will finally call this dynamic library.It is unnatural that this module will cost this much CPU. Vtune labeled 90% of this module's CPU time to status Poor, other 10% to status OK.

Hi Fan,

Robert_I_Intel — Tue, 15 Mar 2016 23:49:41 GMT

Hi Fan,

libigdrcl is one of the OpenCL driver dlls, so you should expect high CPU usage from it during workload submission.

Hi Robert,

Fan_Z_2 — Sun, 20 Mar 2016 06:03:01 GMT

Hi Robert,

My goal is to lower CPU usage by offload some work to GPU, but due to the high CPU usage from the OPENCL driver, it can't be done.It would be very helpful if you could give me some clues on what operation will have a significant impact on the CPU usage.Thank you.

Hi Fan,

Robert_I_Intel — Wed, 30 Mar 2016 23:56:04 GMT

Hi Fan,

Could you provide a workload you are trying to run as well as let me know what OS/Processor/Graphics driver version are you using?

Thanks!