Check all pools simultaneously at startup switching to the first alive one to speed up startup.

cgminer.c

@@ -6922,9 +6922,43 @@ static void *hotplug_thread(void __maybe_unused *userdata)
 }
 #endif
 
+static bool pools_active = false;
+
+static void *test_pool_thread(void *arg)
+{
+	struct pool *pool = (struct pool *)arg;
+
+	if (pool_active(pool, false)) {
+		pool_tset(pool, &pool->lagging);
+		pool_tclear(pool, &pool->idle);
+		applog(LOG_INFO, "Pool %d %s active", pool->pool_no, pool->rpc_url);
+		mutex_lock(&control_lock);
+		if (!pools_active) {
+			currentpool = pool;
+			if (pool->pool_no != 0)
+				applog(LOG_NOTICE, "Switching to pool %d %s - first alive pool", pool->pool_no, pool->rpc_url);
+		}
+		pools_active = true;
+		mutex_unlock(&control_lock);
+	}
+
+	return NULL;
+}
+
+static void probe_pools(void)
+{
+	int i;
+
+	for (i = 0; i < total_pools; i++) {
+		pthread_t *test_thread = malloc(sizeof(pthread_t));
+		struct pool *pool = pools[i];
+
+		pthread_create(test_thread, NULL, test_pool_thread, (void *)pool);
+	}
+}
+
 int main(int argc, char *argv[])
 {
-	bool pools_active = false;
 	struct sigaction handler;
 	struct thr_info *thr;
 	struct block *block;
@@ -7299,24 +7333,14 @@ int main(int argc, char *argv[])
 
 	applog(LOG_NOTICE, "Probing for an alive pool");
 	do {
+		int slept = 0;
+
 		/* Look for at least one active pool before starting */
-		for (i = 0; i < total_pools; i++) {
-			struct pool *pool  = pools[i];
-
-			if (pool_active(pool, false)) {
-				pool_tset(pool, &pool->lagging);
-				pool_tclear(pool, &pool->idle);
-				if (!currentpool)
-					currentpool = pool;
-				applog(LOG_INFO, "Pool %d %s active", pool->pool_no, pool->rpc_url);
-				pools_active = true;
-				break;
-			} else {
-				if (pool == currentpool)
-					currentpool = NULL;
-				applog(LOG_WARNING, "Unable to get work from pool %d %s", pool->pool_no, pool->rpc_url);
-			}
-		}
+		probe_pools();
+		do {
+			sleep(1);
+			slept++;
+		} while (!pools_active && slept < 60);
 
 		if (!pools_active) {
 			applog(LOG_ERR, "No servers were found that could be used to get work from.");