Hi, Today I migrated a server form C6 to C7. The machine is dedicated for a couple of redis daemons. given the traffic etc, we see cpu0 being 100% in use immediately. No problem, had the same thing on the C6 server. So I pinned certain processes/irq's to other CPU's and made irqbalance was monitoring things. That did solve the issue in C6, but not this time. The links below contain the output of /proc/interrupts. As you can see CPU0 doesn't seem that busy http://pastebin.centos.org/23361/ http://pastebin.centos.org/23366/ The 2nd paste was about 60 seconds after the first one. Am I missing something here? This is a brand new C7 installation: [root at redis1 ~]# uname -a Linux redis1.gamebasics.lan 3.10.0-229.1.2.el7.x86_64 #1 SMP Fri Mar 27 03:04:26 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Hardware is a brand new supermicro X9DRW board with onboard igb NIC's in use. Hope someone can help me! -- KR, Johan Kooijman