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Set max preferred size to 256 to prevent lying cards from crashing when no worksize is set.

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This commit is contained in:
Con Kolivas 2011-07-10 00:30:12 +10:00
parent 3d9f244e02
commit 0c910673b2
1 changed files with 4 additions and 5 deletions
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9
ocl.c
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@ -318,12 +318,10 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
} }
if (opt_debug) if (opt_debug)
applog(LOG_DEBUG, "Max work group size reported %d", clState->max_work_size); applog(LOG_DEBUG, "Max work group size reported %d", clState->max_work_size);
/* Some nvidia cards report 1024 but fail when set larger than 512 !? */
if (clState->max_work_size > 512)
clState->max_work_size = 512;
/* For some reason 2 vectors is still better even if the card says /* For some reason 2 vectors is still better even if the card says
* otherwise */ * otherwise, and many cards lie about their max so use 256 as max
* unless explicitly set on the command line */
if (clState->preferred_vwidth > 1) if (clState->preferred_vwidth > 1)
clState->preferred_vwidth = 2; clState->preferred_vwidth = 2;
if (opt_vectors) if (opt_vectors)
@ -331,7 +329,8 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
if (opt_worksize && opt_worksize <= clState->max_work_size) if (opt_worksize && opt_worksize <= clState->max_work_size)
clState->work_size = opt_worksize; clState->work_size = opt_worksize;
else else
clState->work_size = clState->max_work_size / clState->preferred_vwidth; clState->work_size = (clState->max_work_size <= 256 ? clState->max_work_size : 256) /
clState->preferred_vwidth;
/* Create binary filename based on parameters passed to opencl /* Create binary filename based on parameters passed to opencl
* compiler to ensure we only load a binary that matches what would * compiler to ensure we only load a binary that matches what would