Hey Murilo
I think so too. Tuned is causing this. But I feel like this shouldn't be the case.
It would seem like right thing to do is to ensure post-install out of box governor should be, what's being set in kernel config (on-demand).
Best Adi ________________________________________ From: Murilo Opsfelder Araújo muriloo@linux.vnet.ibm.com Sent: Thursday, July 14, 2016 6:15 PM To: centos-devel@centos.org Cc: Adi Gangidi Subject: Re: [CentOS-devel] Incorrect default governor on CentOS ppc64el builds
From adi.gangidi at rackspace.com Thu Jul 14 01:23:20 2016 Date: Thu, 14 Jul 2016 01:23:20 +0000
Hello nice people on CentOS list,
?Default governor on CentOS 7 ppc64le OS bootup is "conservative" . This has about 20% effect on benchmark numbers, if you don't change the governor to ondemand manually (for specific benchmarks). I tested this on our barreleye power 8 server.
This even though kernel config is set for "ondemand" as default governor:
[root at Barreleye-1 ~]# cat /boot/config-3.10.0-327.el7.ppc64le | grep -i ondemand CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y CONFIG_CPU_FREQ_GOV_ONDEMAND=y
I filed a bug on this with details and am posting here for info and also to accelerate some response on the bug: https://bugs.centos.org/view.php?id=11094
Best Adi Gangidi Rackspace
Hello, Adi.
Any chance that other software is overriding the default CPU governor setting? For example, tuned is a good candidate.
-- Murilo