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Code Issues Releases Wiki Activity

Only mandatorily grab the bflsc mutex on submitting work when the queue is empty.

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This commit is contained in:
Con Kolivas 2013-06-19 10:22:54 +10:00
parent 0fbd375ea3
commit fa881badf4
1 changed files with 16 additions and 3 deletions
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19
driver-bflsc.c
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@ -1638,7 +1638,8 @@ static void bflsc_thread_enable(struct thr_info *thr)
bflsc_initialise(bflsc);
}
static bool bflsc_send_work(struct cgpu_info *bflsc, int dev, struct work *work)
static bool bflsc_send_work(struct cgpu_info *bflsc, int dev, struct work *work,
bool mandatory)
{
struct bflsc_info *sc_info = (struct bflsc_info *)(bflsc->device_data);
struct FullNonceRangeJob data;
@ -1663,7 +1664,15 @@ static bool bflsc_send_work(struct cgpu_info *bflsc, int dev, struct work *work)
try = 0;
mutex_lock(&(bflsc->device_mutex));
/* On faster devices we have a lot of lock contention so only
* mandatorily grab the lock and send work if the queue is empty since
* we have a submit queue. */
if (mandatory)
mutex_lock(&(bflsc->device_mutex));
else {
if (mutex_trylock(&bflsc->device_mutex))
return false;
}
re_send:
err = write_to_dev(bflsc, dev, BFLSC_QJOB, BFLSC_QJOB_LEN, &amount, C_REQUESTQUEJOB);
if (err < 0 || amount != BFLSC_QJOB_LEN) {
@ -1724,6 +1733,8 @@ static bool bflsc_queue_full(struct cgpu_info *bflsc)
// if something is wrong with a device try the next one available
// TODO: try them all? Add an unavailable flag to sc_devs[i] init to 0 here first
while (++tries < 3) {
bool mandatory = false;
// Device is gone - shouldn't normally get here
if (bflsc->usbinfo.nodev) {
ret = true;
@ -1754,6 +1765,8 @@ static bool bflsc_queue_full(struct cgpu_info *bflsc)
}
if (que > sc_info->que_full_enough)
dev = -1;
else if (que == 0)
mandatory = true;
}
rd_unlock(&(sc_info->stat_lock));
@ -1767,7 +1780,7 @@ static bool bflsc_queue_full(struct cgpu_info *bflsc)
work = get_queued(bflsc);
if (unlikely(!work))
break;
if (bflsc_send_work(bflsc, dev, work)) {
if (bflsc_send_work(bflsc, dev, work, mandatory)) {
work = NULL;
break;
} else