Commit 2ec612e0b4084c93ee76b5879eb9fb50be1955b4
2012-06-13T17:26:37
Added startup delay to worker threads. Prevents devices from making calls at the same time.
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diff --git a/driver-bitforce.c b/driver-bitforce.c
index 9b76fd4..61d7c0c 100644
--- a/driver-bitforce.c
+++ b/driver-bitforce.c
@@ -24,6 +24,7 @@
#define BITFORCE_TIMEOUT_MS 15000
#define BITFORCE_CHECK_INTERVAL_MS 10
#define WORK_CHECK_INTERVAL_MS 50
+#define MAX_START_DELAY_US 100000
struct device_api bitforce_api;
@@ -369,6 +370,19 @@ static bool bitforce_get_stats(struct cgpu_info *bitforce)
return bitforce_get_temp(bitforce);
}
+static bool bitforce_thread_init(struct thr_info *thr)
+{
+ unsigned int wait;
+ thr;
+ /* Pause each new thread a random time between 0-100ms
+ so the devices aren't making calls all at the same time. */
+ wait = (rand() * MAX_START_DELAY_US)/RAND_MAX;
+ applog(LOG_DEBUG, "BFL%i: Delaying start by %dms", bitforce->device_id, wait/1000);
+ usleep(wait);
+
+ return true;
+}
+
struct device_api bitforce_api = {
.dname = "bitforce",
.name = "BFL",
@@ -377,6 +391,7 @@ struct device_api bitforce_api = {
.get_statline_before = get_bitforce_statline_before,
.get_stats = bitforce_get_stats,
.thread_prepare = bitforce_thread_prepare,
+ .thread_init = bitforce_thread_init,
.scanhash = bitforce_scanhash,
.thread_shutdown = bitforce_shutdown,
.thread_enable = biforce_thread_enable