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Reduce max kernel threads from 256 to 64 in -w 4 to save host and GPU memory

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jsteube 2018-02-06 09:38:54 +01:00
parent 5391edca0d
commit cdc4f3828b
1 changed files with 3 additions and 2 deletions
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5
src/interface.c
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@ -26023,9 +26023,10 @@ u32 hashconfig_get_kernel_threads (hashcat_ctx_t *hashcat_ctx, const hc_device_p
// kernel_accel_max to be a very low number because the pws buffer will be so large otherwise. // kernel_accel_max to be a very low number because the pws buffer will be so large otherwise.
// therefore autotune will be unable to calculate a good kernel_accel multiplier. // therefore autotune will be unable to calculate a good kernel_accel multiplier.
// currently there's no OpenCL device known that needs result in a better performance with 1024 threads compared to 256. // currently there's no OpenCL device known that needs result in a better performance with 1024 threads compared to 256.
// as a result, we limit the number of threads to 256, which turns out to be a general good value. // as a result, we limit the number of threads to 64, which turns out to be a general good value.
// there's a 1.00% - 2.75% performance drop at NV caused by this, and 0.00% - 1.02% at AMD.
kernel_threads = MIN (kernel_threads, 256); kernel_threads = MIN (kernel_threads, 64);
return kernel_threads; return kernel_threads;
} }