GOSTSec/sgminer
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Use the detected maximum allocable memory on a GPU to determine the optimal scrypt settings when lookup_gap and thread_concurrency parameters are not given.

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This commit is contained in:
Con Kolivas 2012-07-23 17:51:57 +10:00
parent 89eb1fa393
commit d8f81c18ee
1 changed files with 11 additions and 5 deletions
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16
ocl.c
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@ -472,10 +472,14 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
#ifdef USE_SCRYPT
if (opt_scrypt) {
if (!gpus[gpu].lookup_gap)
if (!gpus[gpu].lookup_gap) {
applog(LOG_DEBUG, "GPU %d: selecting lookup gap of 2", gpu);
gpus[gpu].lookup_gap = 2;
if (!gpus[gpu].thread_concurrency)
gpus[gpu].thread_concurrency = 2048;
}
if (!gpus[gpu].thread_concurrency) {
gpus[gpu].thread_concurrency = gpus[gpu].max_alloc / 32768 / gpus[gpu].lookup_gap;
applog(LOG_DEBUG, "GPU %d: selecting thread concurrency of %u",gpu, gpus[gpu].thread_concurrency);
}
}
#endif
@ -769,9 +773,11 @@ built:
size_t ipt = (1024 / gpus[gpu].lookup_gap + (1024 % gpus[gpu].lookup_gap > 0));
size_t bufsize = 128 * ipt * gpus[gpu].thread_concurrency;
if (bufsize % 256)
bufsize += (256 - bufsize % 256);
applog(LOG_DEBUG, "Creating scrypt buffer sized %d", bufsize);
if (bufsize > gpus[gpu].max_alloc) {
applog(LOG_WARNING, "Maximum buffer memory device %d supports says %u, your scrypt settings come to %u",
gpu, gpus[gpu].max_alloc, bufsize);
}
clState->padbufsize = bufsize;
clState->padbuffer8 = clCreateBuffer(clState->context, CL_MEM_READ_WRITE, bufsize, NULL, &status);
if (status != CL_SUCCESS) {