diff --git a/api.cpp b/api.cpp
index 86e2b4f..337a518 100644
--- a/api.cpp
+++ b/api.cpp
@@ -995,7 +995,7 @@ void *api_thread(void *userdata)
 /* to be able to report the default value set in each algo */
 void api_set_throughput(int thr_id, uint32_t throughput)
 {
-	if (thr_id < MAX_GPUS) {
+	if (thr_id < MAX_GPUS && thr_info) {
 		struct cgpu_info *cgpu = &thr_info[thr_id].gpu;
 		uint32_t ws = throughput;
 		uint8_t i = 0;
@@ -1007,9 +1007,8 @@ void api_set_throughput(int thr_id, uint32_t throughput)
 		if (i && (1U << i) < throughput) {
 			cgpu->intensity += ((float) (throughput-(1U << i)) / (1U << i));
 		}
-
-		// to display in bench results
-		if (opt_benchmark)
-			bench_set_throughput(thr_id, throughput);
 	}
+	// to display in bench results
+	if (opt_benchmark)
+		bench_set_throughput(thr_id, throughput);
 }
diff --git a/ccminer.cpp b/ccminer.cpp
index 62ef352..ab52139 100644
--- a/ccminer.cpp
+++ b/ccminer.cpp
@@ -167,7 +167,7 @@ pthread_mutex_t stratum_work_lock;
 char *opt_cert;
 char *opt_proxy;
 long opt_proxy_type;
-struct thr_info *thr_info;
+struct thr_info *thr_info = NULL;
 static int work_thr_id;
 struct thr_api *thr_api;
 int longpoll_thr_id = -1;
@@ -473,6 +473,7 @@ void get_currentalgo(char* buf, int sz)
  */
 void proper_exit(int reason)
 {
+	restart_threads();
 	if (abort_flag) /* already called */
 		return;
 
@@ -3042,10 +3043,13 @@ int main(int argc, char *argv[])
 	rpc_user = strdup("");
 	rpc_pass = strdup("");
 	rpc_url = strdup("");
-
 	jane_params = strdup("");
 
 	pthread_mutex_init(&applog_lock, NULL);
+	pthread_mutex_init(&stratum_sock_lock, NULL);
+	pthread_mutex_init(&stratum_work_lock, NULL);
+	pthread_mutex_init(&stats_lock, NULL);
+	pthread_mutex_init(&g_work_lock, NULL);
 
 	// number of cpus for thread affinity
 #if defined(WIN32)
@@ -3114,11 +3118,6 @@ int main(int argc, char *argv[])
 
 	/* init stratum data.. */
 	memset(&stratum.url, 0, sizeof(stratum));
-	pthread_mutex_init(&stratum_sock_lock, NULL);
-	pthread_mutex_init(&stratum_work_lock, NULL);
-
-	pthread_mutex_init(&stats_lock, NULL);
-	pthread_mutex_init(&g_work_lock, NULL);
 
 	// ensure default params are set
 	pool_init_defaults();
diff --git a/cuda.cpp b/cuda.cpp
index ffbec5b..deb58f6 100644
--- a/cuda.cpp
+++ b/cuda.cpp
@@ -229,6 +229,8 @@ typedef struct { double value[8]; } tsumarray;
 cudaError_t MyStreamSynchronize(cudaStream_t stream, int situation, int thr_id)
 {
 	cudaError_t result = cudaSuccess;
+	if (abort_flag)
+		return result;
 	if (situation >= 0)
 	{
 		static std::map<int, tsumarray> tsum;