8 Replies Latest reply: Jun 12, 2013 8:13 PM by himanshu.gautam RSS

OpenCL under Linux is slow unless I use CL_QUEUE_PROFILING_ENABLE

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I'm getting severely slowed down performance under Linux (Ubuntu 12.04 64bit) with HD 7790 Catalyst Performance Driver.  It ran fine under Windows on the same GPU (about 4 to 8 times faster).


When I tried profiling with CodeXL - the slow down went away.  I then realized that setting CL_QUEUE_PROFILING_ENABLE made it run a lot faster, just like under Windows.




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