The gpuminer thread uses very little cpu and needs to keep the gpu busy with as few delays as possible. Don't nice it.
diff --git a/cpu-miner.c b/cpu-miner.c
index ff428d5..5cd41db 100644
--- a/cpu-miner.c
+++ b/cpu-miner.c
@@ -798,8 +798,6 @@ static void *gpuminer_thread(void *userdata)
uint32_t res[128], blank_res[128];
cl_kernel *kernel;
- setpriority(PRIO_PROCESS, 0, 19);
-
memset(blank_res, 0, BUFFERSIZE);
size_t globalThreads[1];