tweak on latencies between gpu round

ccminer.cpp

@@ -182,10 +182,10 @@ bool use_colors = true;
 static bool opt_background = false;
 bool opt_quiet = false;
 static int opt_retries = -1;
-static int opt_fail_pause = 30;
+static int opt_fail_pause = 5;
 static int opt_time_limit = 0;
-int opt_timeout = 300;
-static int opt_scantime = 30;
+int opt_timeout = 270;
+static int opt_scantime = 5;
 static json_t *opt_config;
 static const bool opt_time = true;
 static enum sha_algos opt_algo = ALGO_X11;
@@ -1333,7 +1333,7 @@ static void *miner_thread(void *userdata)
 		if (have_stratum) 
 		{
 			uint32_t sleeptime = 0;
-			while (!work_done && time(NULL) >= (g_work_time + opt_scantime)) 
+			while (!work_done && time(NULL) >= (g_work_time + 60)) 
 			{
 				usleep(100*1000);
 				if (sleeptime > 4) {