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blake: only use high part of target on gpu

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Add another few MH/s boost :)
This commit is contained in:
Tanguy Pruvot 2014-09-12 23:28:19 +02:00
parent cc296a0618
commit 9efe0b965d
2 changed files with 32 additions and 43 deletions
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71
blake32.cu
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@ -21,7 +21,7 @@ extern "C" uint32_t crc32_u32t(const uint32_t *buf, size_t size);
extern "C" int blake256_rounds = 14;
/* hash by cpu with blake 256 */
extern "C" void blake256hash(void *output, const void *input, int rounds = 14)
extern "C" void blake256hash(void *output, const void *input, int8_t rounds = 14)
{
unsigned char hash[64];
sph_blake256_context ctx;
@ -44,15 +44,16 @@ extern bool opt_n_threads;
extern bool opt_benchmark;
extern int device_map[8];
__constant__
static uint32_t __align__(32) c_Target[8];
__constant__
static uint32_t __align__(32) c_data[20];
// only store the 2 high uint32 of the target hash
__constant__ static uint64_t c_Target;
__constant__ static int8_t c_BlakeRounds;
/* 8 adapters max (-t threads) */
static uint32_t *d_resNounce[8];
static uint32_t *h_resNounce[8];
static uint32_t *d_resNonce[8];
static uint32_t *h_resNonce[8];
/* max count of found nounces in one call */
#define NBN 2
@ -131,7 +132,7 @@ static const uint32_t __align__(32) c_Padding[16] = {
};
__device__ static
void blake256_compress(uint32_t *h, const uint32_t *block, const uint32_t T0, int blakerounds)
void blake256_compress(uint32_t *h, const uint32_t *block, const uint32_t T0)
{
uint32_t /* __align__(8) */ m[16];
uint32_t /* __align__(8) */ v[16];
@ -159,7 +160,8 @@ void blake256_compress(uint32_t *h, const uint32_t *block, const uint32_t T0, in
v[14] = c_u256[6];
v[15] = c_u256[7];
for (int i = 0; i < blakerounds; i++) {
int rounds = c_BlakeRounds;
for (int i = 0; i < rounds; i++) {
/* column step */
GS(0, 4, 0x8, 0xC, 0x0);
GS(1, 5, 0x9, 0xD, 0x2);
@ -180,7 +182,7 @@ void blake256_compress(uint32_t *h, const uint32_t *block, const uint32_t T0, in
}
__global__
void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resNounce, const int blakerounds, const int crcsum)
void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resNounce, const int crcsum)
{
uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
if (thread < threads)
@ -194,11 +196,11 @@ void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resN
}
#if !USE_CACHE
blake256_compress(h, c_data, 512, blakerounds);
blake256_compress(h, c_data, 512);
#else
if (crcsum != prevsum) {
prevsum = crcsum;
blake256_compress(h, c_data, 512, blakerounds);
blake256_compress(h, c_data, 512);
#pragma unroll
for(int i=0; i<8; i++) {
cache[i] = h[i];
@ -218,21 +220,10 @@ void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resN
ending[2] = c_data[18];
ending[3] = nounce; /* our tested value */
blake256_compress(h, ending, 640, blakerounds);
#if 0
for (int i = 7; i >= 0; i--) {
uint32_t hash = cuda_swab32(h[i]);
if (hash > c_Target[i]) {
return;
}
if (hash < c_Target[i]) {
break;
}
}
#else
blake256_compress(h, ending, 640);
/* do not test all parts, fulltest() will do it */
if (cuda_swab32(h[7]) <= c_Target[7])
#endif
if (((uint64_t*)h)[3] <= c_Target)
#if NBN == 2
/* keep the smallest nounce, + extra one if found */
if (resNounce[0] > nounce) {
@ -248,7 +239,7 @@ void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resN
}
__host__
uint32_t blake256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, const int blakerounds, const uint32_t crcsum)
uint32_t blake256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, const uint32_t crcsum)
{
const int threadsperblock = TPB;
uint32_t result = MAXU;
@ -258,32 +249,33 @@ uint32_t blake256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce
size_t shared_size = 0;
/* Check error on Ctrl+C or kill to prevent segfaults on exit */
if (cudaMemset(d_resNounce[thr_id], 0xff, NBN*sizeof(uint32_t)) != cudaSuccess)
if (cudaMemset(d_resNonce[thr_id], 0xff, NBN*sizeof(uint32_t)) != cudaSuccess)
return result;
blake256_gpu_hash_80<<<grid, block, shared_size>>>(threads, startNounce, d_resNounce[thr_id], blakerounds, crcsum);
blake256_gpu_hash_80<<<grid, block, shared_size>>>(threads, startNounce, d_resNonce[thr_id], crcsum);
cudaDeviceSynchronize();
if (cudaSuccess == cudaMemcpy(h_resNounce[thr_id], d_resNounce[thr_id], NBN*sizeof(uint32_t), cudaMemcpyDeviceToHost)) {
if (cudaSuccess == cudaMemcpy(h_resNonce[thr_id], d_resNonce[thr_id], NBN*sizeof(uint32_t), cudaMemcpyDeviceToHost)) {
//cudaThreadSynchronize(); /* seems no more required */
result = h_resNounce[thr_id][0];
result = h_resNonce[thr_id][0];
for (int n=0; n < (NBN-1); n++)
extra_results[n] = h_resNounce[thr_id][n+1];
extra_results[n] = h_resNonce[thr_id][n+1];
}
return result;
}
__host__
void blake256_cpu_setBlock_80(uint32_t *pdata, const uint32_t *ptarget)
void blake256_cpu_setBlock_80(uint32_t *pdata, const uint32_t *ptarget, int8_t blakerounds)
{
uint32_t data[20];
memcpy(data, pdata, 80);
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_data, data, sizeof(data), 0, cudaMemcpyHostToDevice));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_sigma, host_sigma, sizeof(host_sigma), 0, cudaMemcpyHostToDevice));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_Target, ptarget, 32, 0, cudaMemcpyHostToDevice));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_Target, &ptarget[6], 2*sizeof(uint32_t), 0, cudaMemcpyHostToDevice));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_BlakeRounds, &blakerounds, sizeof(int8_t), 0, cudaMemcpyHostToDevice));
}
extern "C" int scanhash_blake256(int thr_id, uint32_t *pdata, const uint32_t *ptarget,
uint32_t max_nonce, unsigned long *hashes_done, uint32_t blakerounds=14)
uint32_t max_nonce, unsigned long *hashes_done, int8_t blakerounds=14)
{
const uint32_t first_nonce = pdata[19];
static bool init[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
@ -311,22 +303,19 @@ extern "C" int scanhash_blake256(int thr_id, uint32_t *pdata, const uint32_t *pt
if (opt_n_threads > 1) {
CUDA_SAFE_CALL(cudaSetDevice(device_map[thr_id]));
}
CUDA_SAFE_CALL(cudaMallocHost(&h_resNounce[thr_id], NBN * sizeof(uint32_t)));
CUDA_SAFE_CALL(cudaMalloc(&d_resNounce[thr_id], NBN * sizeof(uint32_t)));
CUDA_SAFE_CALL(cudaMallocHost(&h_resNonce[thr_id], NBN * sizeof(uint32_t)));
CUDA_SAFE_CALL(cudaMalloc(&d_resNonce[thr_id], NBN * sizeof(uint32_t)));
init[thr_id] = true;
}
if (opt_debug && throughput < (TPB * 4096))
applog(LOG_DEBUG, "throughput=%u, start=%x, max=%x", throughput, first_nonce, max_nonce);
blake256_cpu_setBlock_80(pdata, ptarget);
blake256_cpu_setBlock_80(pdata, ptarget, blakerounds);
#if USE_CACHE
crcsum = crc32_u32t(pdata, 64);
#endif
do {
// GPU HASH
uint32_t foundNonce = blake256_cpu_hash_80(thr_id, throughput, pdata[19], blakerounds, crcsum);
uint32_t foundNonce = blake256_cpu_hash_80(thr_id, throughput, pdata[19], crcsum);
if (foundNonce != MAXU)
{
uint32_t endiandata[20];

4
miner.h
View File

@ -243,7 +243,7 @@ extern int scanhash_anime(int thr_id, uint32_t *pdata,
extern int scanhash_blake256(int thr_id, uint32_t *pdata,
const uint32_t *ptarget, uint32_t max_nonce,
unsigned long *hashes_done, uint32_t blakerounds);
unsigned long *hashes_done, int8_t blakerounds);
extern int scanhash_fresh(int thr_id, uint32_t *pdata,
const uint32_t *ptarget, uint32_t max_nonce,
@ -437,7 +437,7 @@ void applog_compare_hash(unsigned char *hash, unsigned char *hash2);
void print_hash_tests(void);
void animehash(void *state, const void *input);
void blake256hash(void *output, const void *input, int rounds);
void blake256hash(void *output, const void *input, int8_t rounds);
void deephash(void *state, const void *input);
void doomhash(void *state, const void *input);
void fresh_hash(void *state, const void *input);