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blake: set a max throughput

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This commit is contained in:
Tanguy Pruvot 2014-09-03 09:29:51 +02:00
parent 7e595a36ea
commit 43d3e93e1a
1 changed files with 10 additions and 6 deletions
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16
blake32.cu
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@ -123,6 +123,8 @@ static const uint32_t c_u256[16] = {
v[b] = SPH_ROTR32(v[b] ^ v[c], 7); \ v[b] = SPH_ROTR32(v[b] ^ v[c], 7); \
} }
#define BLAKE256_ROUNDS 14
__device__ static __device__ static
void blake256_compress(uint32_t *h, uint32_t *block, uint8_t ((*sigma)[16]), const uint32_t *u256, const uint32_t T0, uint8_t nullt = 1) void blake256_compress(uint32_t *h, uint32_t *block, uint8_t ((*sigma)[16]), const uint32_t *u256, const uint32_t T0, uint8_t nullt = 1)
{ {
@ -134,7 +136,7 @@ void blake256_compress(uint32_t *h, uint32_t *block, uint8_t ((*sigma)[16]), con
m[i] = block[i]; m[i] = block[i];
} }
#pragma unroll 8 //#pragma unroll 8
for(int i = 0; i < 8; i++) for(int i = 0; i < 8; i++)
v[i] = h[i]; v[i] = h[i];
@ -149,7 +151,7 @@ void blake256_compress(uint32_t *h, uint32_t *block, uint8_t ((*sigma)[16]), con
v[15] = u256[7]; v[15] = u256[7];
//#pragma unroll //#pragma unroll
for (int i = 0; i < 14; i++) { for (int i = 0; i < BLAKE256_ROUNDS; i++) {
/* column step */ /* column step */
GS(0, 4, 0x8, 0xC, 0); GS(0, 4, 0x8, 0xC, 0);
GS(1, 5, 0x9, 0xD, 2); GS(1, 5, 0x9, 0xD, 2);
@ -178,10 +180,10 @@ extern __device__ __device_builtin__ void __nvvm_memset(uint8_t *, unsigned char
#endif #endif
__global__ __global__
void blake256_gpu_hash_80(int threads, uint32_t startNounce, uint32_t *resNounce) void blake256_gpu_hash_80(uint32_t threads, uint32_t startNounce, uint32_t *resNounce)
{ {
uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x); uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
if (thread < (uint32_t) threads) if (thread < threads)
{ {
const uint32_t nounce = startNounce + thread; const uint32_t nounce = startNounce + thread;
uint32_t /* __align__(8) */ msg[16]; uint32_t /* __align__(8) */ msg[16];
@ -233,7 +235,7 @@ void blake256_gpu_hash_80(int threads, uint32_t startNounce, uint32_t *resNounce
} }
__host__ __host__
uint32_t blake256_cpu_hash_80(int thr_id, int threads, uint32_t startNounce) uint32_t blake256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce)
{ {
const int threadsperblock = TPB; const int threadsperblock = TPB;
@ -269,8 +271,8 @@ extern "C" int scanhash_blake32(int thr_id, uint32_t *pdata, const uint32_t *pta
uint32_t max_nonce, unsigned long *hashes_done) uint32_t max_nonce, unsigned long *hashes_done)
{ {
const uint32_t first_nonce = pdata[19]; const uint32_t first_nonce = pdata[19];
const int throughput = TPB * 2048; /* 2048 threads is the max on a 750Ti */
static bool init[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; static bool init[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
uint32_t throughput = min(TPB * 2048, max_nonce - first_nonce);
int rc = 0; int rc = 0;
if (opt_benchmark) if (opt_benchmark)
@ -294,6 +296,8 @@ extern "C" int scanhash_blake32(int thr_id, uint32_t *pdata, const uint32_t *pta
uint32_t vhashcpu[8]; uint32_t vhashcpu[8];
uint32_t Htarg = ptarget[7]; uint32_t Htarg = ptarget[7];
applog(LOG_WARNING, "throughput=%u, start=%x, max=%x", throughput, first_nonce, max_nonce);
for (int k=0; k < 20; k++) for (int k=0; k < 20; k++)
be32enc(&endiandata[k], pdata[k]); be32enc(&endiandata[k], pdata[k]);