On Thu, Jun 18, 2015 at 1:25 AM, Hansa <forums@xxxxxxxxxx> wrote: > Hi, > > I have a LAMP server as guest in KVM. Whenever the server is idle for some > time it takes about 30 seconds to load a Wordpress site. > If the server is not idle the site shows up in max 5 seconds. I've already > turned of power management in the guest by passing > > GRUB_CMDLINE_LINUX_DEFAULT="apm=off" > > in /etc/default/grub. This has no effect. > Does KVM do some power management on guests? If so, how do I turn this off > for my LAMP guest? KVM doesn't do any power management of guests. But if everything is idle on the host (including your guest), then host power management could kick in. Have you tried playing with host pm? Could you try running your workload with the guest kernel parameter "idle=poll" and let me know the performance? Also, if you are running Linux 4.0 or later on the host, could you try running your workload with the KVM module parameter "halt_poll_ns=500000"? > > Best, Hansa > > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
