diff --git a/profiles/realtime-virtual-host/tuned.conf b/profiles/realtime-virtual-host/tuned.conf
--- a/profiles/realtime-virtual-host/tuned.conf
+++ b/profiles/realtime-virtual-host/tuned.conf
@@ -38,10 +38,13 @@ assert=${f:assertion:isolated_cores contains present CPU(s):${isolated_cores_exp
 group.ksoftirqd=0:f:2:*:ksoftirqd.*
 
 # for i in `pgrep rcuc` ; do grep Cpus_allowed_list /proc/$i/status ; done
-group.rcuc=0:f:3:*:rcuc.*
+group.rcuc=0:f:4:*:rcuc.*
 
 # for i in `pgrep rcub` ; do grep Cpus_allowed_list /proc/$i/status ; done
-group.rcub=0:f:3:*:rcub.*
+group.rcub=0:f:4:*:rcub.*
+
+# for i in `pgrep ktimersoftd` ; do grep Cpus_allowed_list /proc/$i/status ; done
+group.ktimersoftd=0:f:3:*:ktimersoftd.*
 
 [script]
 script=script.sh