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The buffer needs to be flushed before enqueueing the kernel again.

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Further optimise the mining loop by removing the need_work bool.
This commit is contained in:
Con Kolivas 2011-06-27 12:02:47 +10:00
parent a45c54aaf8
commit 948b514cf2
1 changed files with 11 additions and 17 deletions
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28
cpu-miner.c
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@ -871,7 +871,7 @@ static inline int gpu_from_thr_id(int thr_id)
static void *gpuminer_thread(void *userdata)
{
struct thr_info *mythr = userdata;
struct timeval tv_start;
struct timeval tv_start, diff;
int thr_id = mythr->id;
uint32_t res[128], blank_res[128];
cl_kernel *kernel;
@ -892,7 +892,6 @@ static void *gpuminer_thread(void *userdata)
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
struct work *work = malloc(sizeof(struct work));
bool need_work = true;
unsigned const int threads = 1 << (15 + scan_intensity);
unsigned const int vectors = clState->preferred_vwidth;
unsigned const int hashes = threads * vectors;
@ -901,14 +900,16 @@ static void *gpuminer_thread(void *userdata)
gettimeofday(&tv_start, NULL);
globalThreads[0] = threads;
localThreads[0] = clState->work_size;
work_restart[thr_id].restart = 1;
diff.tv_sec = 0;
while (1) {
struct timeval tv_end, diff, tv_workstart;
struct timeval tv_end, tv_workstart;
unsigned int i;
/* This finish flushes the readbuffer set with CL_FALSE later */
clFinish(clState->commandQueue);
if (need_work) {
if (diff.tv_sec > opt_scantime || work->blk.nonce > MAXTHREADS - hashes || work_restart[thr_id].restart) {
gettimeofday(&tv_workstart, NULL);
/* obtain new work from internal workio thread */
if (unlikely(!get_work(work))) {
@ -924,22 +925,15 @@ static void *gpuminer_thread(void *userdata)
{ applog(LOG_ERR, "Error: clSetKernelArg of all params failed."); goto out; }
work_restart[thr_id].restart = 0;
need_work = false;
if (opt_debug)
applog(LOG_DEBUG, "getwork");
} else {
status = clSetKernelArg(*kernel, 14, sizeof(uint), (void *)&work->blk.nonce);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clSetKernelArg of nonce failed."); goto out; }
}
status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, NULL,
globalThreads, localThreads, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)"); goto out; }
/* 127 is used as a flag to say nonces exist */
if (unlikely(res[127])) {
/* Clear the buffer again */
@ -957,6 +951,11 @@ static void *gpuminer_thread(void *userdata)
clFinish(clState->commandQueue);
}
status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, NULL,
globalThreads, localThreads, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)"); goto out; }
status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
@ -973,11 +972,6 @@ static void *gpuminer_thread(void *userdata)
}
timeval_subtract(&diff, &tv_end, &tv_workstart);
if (diff.tv_sec > opt_scantime ||
work->blk.nonce > MAXTHREADS - hashes ||
work_restart[thr_id].restart)
need_work = true;
}
out:
tq_freeze(mythr->q);