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blake: prevent empty scan ranges with multiple gpus

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in some cases, an empty scan range was possible in benchmark..
This commit is contained in:
Tanguy Pruvot 2015-11-01 21:59:51 +01:00
parent 61ff92b5b4
commit 113e22de2e
2 changed files with 10 additions and 3 deletions
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10
Algo256/blake256.cu
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@ -281,7 +281,7 @@ __global__
void blake256_gpu_hash_16(const uint32_t threads, const uint32_t startNonce, uint32_t *resNonce,
const uint64_t highTarget, const int rounds, const bool trace)
{
uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
const uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
if (thread < threads)
{
const uint32_t nonce = startNonce + thread;
@ -336,6 +336,8 @@ static uint32_t blake256_cpu_hash_16(const int thr_id, const uint32_t threads, c
dim3 grid((threads + threadsperblock-1)/threadsperblock);
dim3 block(threadsperblock);
cudaGetLastError();
/* Check error on Ctrl+C or kill to prevent segfaults on exit */
if (cudaMemset(d_resNonce[thr_id], 0xff, NBN*sizeof(uint32_t)) != cudaSuccess)
return result;
@ -347,6 +349,7 @@ static uint32_t blake256_cpu_hash_16(const int thr_id, const uint32_t threads, c
for (int n=0; n < (NBN-1); n++)
extra_results[n] = h_resNonce[thr_id][n+1];
}
CUDA_LOG_ERROR();
return result;
}
@ -429,6 +432,9 @@ extern "C" int scanhash_blake256(int thr_id, struct work* work, uint32_t max_non
#endif /* PRECALC64 */
do {
*hashes_done = pdata[19] - first_nonce + throughput;
uint32_t foundNonce =
#if PRECALC64
// GPU HASH (second block only, first is midstate)
@ -437,8 +443,6 @@ extern "C" int scanhash_blake256(int thr_id, struct work* work, uint32_t max_non
// GPU FULL HASH
blake256_cpu_hash_80(thr_id, throughput, pdata[19], targetHigh, crcsum, blakerounds);
#endif
*hashes_done = pdata[19] - first_nonce + throughput;
if (foundNonce != UINT32_MAX && bench_algo == -1)
{
uint32_t vhashcpu[8];

3
ccminer.cpp
View File

@ -1953,6 +1953,9 @@ static void *miner_thread(void *userdata)
// to debug nonce ranges
gpulog(LOG_DEBUG, thr_id, "ends=%08x range=%08x", nonceptr[0], (nonceptr[0] - start_nonce));
}
// prevent low scan ranges on next loop on fast algos (blake)
if (nonceptr[0] > UINT32_MAX - 64)
nonceptr[0] = UINT32_MAX;
}
if (check_dups)