diff -uNr tumbler-0.3.1.orig/tumblerd/tumbler-group-scheduler.c tumbler-0.3.1/tumblerd/tumbler-group-scheduler.c
--- tumbler-0.3.1.orig/tumblerd/tumbler-group-scheduler.c	2020-11-16 00:19:23.000000000 +0800
+++ tumbler-0.3.1/tumblerd/tumbler-group-scheduler.c	2021-06-15 20:05:33.748518520 +0800
@@ -164,7 +164,7 @@
 
   /* allocate a pool with one thread for all requests */
   scheduler->pool = g_thread_pool_new (tumbler_group_scheduler_thread, 
-                                       scheduler, 1, TRUE, NULL);
+                                       scheduler, g_get_num_processors(), TRUE, NULL);
 
 }