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Use cgsem timed waits in avalon driver to not miss any queued wake ups to account for async messages coming during a flush work.

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This commit is contained in:
Con Kolivas 2013-11-05 21:09:08 +11:00
parent 7011a7a008
commit a4c96d759a
2 changed files with 14 additions and 18 deletions
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30
driver-avalon.c
View File

@ -1187,9 +1187,10 @@ static void *avalon_send_tasks(void *userdata)
}
avalon_rotate_array(avalon);
pthread_cond_signal(&info->qcond);
mutex_unlock(&info->qlock);
cgsem_post(&info->qsem);
if (unlikely(idled)) {
applog(LOG_WARNING, "%s%i: Idled %d miners",
avalon->drv->name, avalon->device_id, idled);
@ -1271,9 +1272,10 @@ static void *bitburner_send_tasks(void *userdata)
}
bitburner_rotate_array(avalon);
pthread_cond_signal(&info->qcond);
mutex_unlock(&info->qlock);
cgsem_post(&info->qsem);
if (unlikely(idled)) {
applog(LOG_WARNING, "%s%i: Idled %d miners",
avalon->drv->name, avalon->device_id, idled);
@ -1303,8 +1305,7 @@ static bool avalon_prepare(struct thr_info *thr)
info->thr = thr;
mutex_init(&info->lock);
mutex_init(&info->qlock);
if (unlikely(pthread_cond_init(&info->qcond, NULL)))
quit(1, "Failed to pthread_cond_init avalon qcond");
cgsem_init(&info->qsem);
if (pthread_create(&info->read_thr, NULL, avalon_get_results, (void *)avalon))
quit(1, "Failed to create avalon read_thr");
@ -1513,22 +1514,15 @@ static int64_t avalon_scanhash(struct thr_info *thr)
struct cgpu_info *avalon = thr->cgpu;
struct avalon_info *info = avalon->device_data;
const int miner_count = info->miner_count;
struct timeval now, then, tdiff;
int64_t hash_count, us_timeout;
struct timespec abstime;
int64_t hash_count, ms_timeout;
/* Half nonce range */
us_timeout = 0x80000000ll / info->asic_count / info->frequency;
us_to_timeval(&tdiff, us_timeout);
cgtime(&now);
timeradd(&now, &tdiff, &then);
timeval_to_spec(&abstime, &then);
ms_timeout = 0x80000000ll / info->asic_count / info->frequency / 1000;
/* Wait until avalon_send_tasks signals us that it has completed
* sending its work or a full nonce range timeout has occurred */
mutex_lock(&info->qlock);
pthread_cond_timedwait(&info->qcond, &info->qlock, &abstime);
mutex_unlock(&info->qlock);
* sending its work or a full nonce range timeout has occurred. We use
* cgsems to never miss a wakeup. */
cgsem_mswait(&info->qsem, ms_timeout);
mutex_lock(&info->lock);
hash_count = 0xffffffffull * (uint64_t)info->nonces;
@ -1567,8 +1561,10 @@ static void avalon_flush_work(struct cgpu_info *avalon)
mutex_lock(&info->qlock);
/* Will overwrite any work queued */
avalon->queued = 0;
pthread_cond_signal(&info->qcond);
mutex_unlock(&info->qlock);
/* Signal main loop we need more work */
cgsem_post(&info->qsem);
}
static struct api_data *avalon_api_stats(struct cgpu_info *cgpu)

2
driver-avalon.h
View File

@ -145,7 +145,7 @@ struct avalon_info {
pthread_t write_thr;
pthread_mutex_t lock;
pthread_mutex_t qlock;
pthread_cond_t qcond;
cgsem_t qsem;
int nonces;
int auto_queued;