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mordock2012
Journeyman III

Jocl OpenCL speed difference between processor and graphics card not what expected

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Hello,

I am using JOCL to run some kernel against both the CPU and the graphics card. The processing works fairly quickly for the processor but takes forever for the graphics card(Actually I have never waited for it to finish..and I've ran the code all night).

Would anyone happen to know what could be causing a the speed difference between the graphics card and the CPU. I was expecting the graphics card to run things faster. As it stands, the processor finishes the task and the graphics card takes forever and has not finished yet.

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notzed
Challenger

Re: Jocl OpenCL speed difference between processor and graphics card not what expected

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A GPU isn't suited to every algorithm, so even with the best code sometimes it wont be faster.  It should be on par though, so if it's "running forever" you simply have bugs.

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hsaigol
Adept III

Re: Jocl OpenCL speed difference between processor and graphics card not what expected

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hi mordock2012

i dont think anyone here can give you an answer without looking at your code and more system details such as windows version, graphics card, driver version.

notzed
Challenger

Re: Jocl OpenCL speed difference between processor and graphics card not what expected

Jump to solution

A GPU isn't suited to every algorithm, so even with the best code sometimes it wont be faster.  It should be on par though, so if it's "running forever" you simply have bugs.

View solution in original post

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