Fixes for CPU burn engine

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index dc5fed9..201a405 100644
--- a/init.c
+++ b/init.c
@@ -746,6 +746,7 @@
 		return 1;
 	}
 
+	memset(threads, 0, max_jobs * sizeof(struct thread_data));
 	atexit(free_shm);
 	return 0;
 }