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Make the scan sleep time after scanwork in bflsc dynamic to keep queues between watermark levels.

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This commit is contained in:
Con Kolivas 2013-04-27 14:22:50 +10:00
parent b0e6f68b65
commit 4f0f5fb791
1 changed files with 27 additions and 3 deletions
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30
driver-bflsc.c
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@ -273,7 +273,6 @@ struct SaveString {
// Defaults (slightly over half the work time) but ensure none are above 100
// SCAN_TIME - delay after sending work
// RES_TIME - delay between checking for results
// TODO: make dynamic? (for all but MiniRig)
#define BAM_SCAN_TIME 20
#define BAM_RES_TIME 2
#define BAS_SCAN_TIME 360
@ -286,6 +285,7 @@ struct SaveString {
#define BFLSC_TEMP_SLEEPMS 5
#define BFLSC_QUE_SIZE 20
#define BFLSC_QUE_FULL_ENOUGH 13
#define BFLSC_QUE_WATERMARK 6
#define BFLSC_BUFSIZ (0x200)
@ -1443,6 +1443,8 @@ static void bflsc_shutdown(struct thr_info *thr)
{
struct cgpu_info *bflsc = thr->cgpu;
struct bflsc_info *sc_info = (struct bflsc_info *)(bflsc->device_file);
bflsc_flush_work(bflsc);
sc_info->shutdown = true;
}
@ -1602,7 +1604,7 @@ static int64_t bflsc_scanwork(struct thr_info *thr)
int64_t ret, unsent;
bool flushed, cleanup;
struct work *work, *tmp;
int dev;
int dev, waited = ETIMEDOUT, i;
// Device is gone
if (bflsc->usbinfo.nodev)
@ -1650,7 +1652,29 @@ static int64_t bflsc_scanwork(struct thr_info *thr)
// avoid a hard loop
if (sc_info->scan_sleep_time > 0)
restart_wait(sc_info->scan_sleep_time);
waited = restart_wait(sc_info->scan_sleep_time);
if (waited == ETIMEDOUT) {
/* Only adjust the scan_sleep_time if we did not receive a
* restart message while waiting. Try to adjust sleep time
* so we drop to BFLSC_QUE_WATERMARK before getting more work.
*/
int min_queued = BFLSC_QUE_SIZE;
for (i = 0; i < sc_info->sc_count; i++) {
if (sc_info->sc_devs[i].work_queued < min_queued)
min_queued = sc_info->sc_devs[i].work_queued;
}
/* Increase slowly but decrease quickly */
if (min_queued > BFLSC_QUE_WATERMARK) {
sc_info->scan_sleep_time = sc_info->scan_sleep_time * 21 / 20;
applog(LOG_DEBUG, "%s%i: Increased scan_sleep_time to %d",
bflsc->drv->name, bflsc->device_id, sc_info->scan_sleep_time);
} else if (min_queued < BFLSC_QUE_WATERMARK) {
sc_info->scan_sleep_time = sc_info->scan_sleep_time * 2 / 3;
applog(LOG_DEBUG, "%s%i: Decreased scan_sleep_time to %d",
bflsc->drv->name, bflsc->device_id, sc_info->scan_sleep_time);
}
}
// Count up the work done since we last were here
ret = 0;