[libvirt-users] Performance monotoring: Perf Event support
Hi everyone, I am using libvirt 2.5.0. I'd like to enable the "perf events" to monitoring my vm performance such as l3 cache. But it failed with "error: argument unsupported: unable to enable host cpu perf event for cmt". 1. Could you please give some hints on how to check if my host CPU supports cmt,mbm, is it displayed in /proc/cpuinfo? 2. Does the kernel version matters as well to support it? Thanks, Hui
On Mon, Apr 24, 2017 at 06:54:32PM +0200, Hui Jing wrote:
Hi everyone,
I am using libvirt 2.5.0. I'd like to enable the "perf events" to monitoring my vm performance such as l3 cache. But it failed with "error: argument unsupported: unable to enable host cpu perf event for cmt". 1. Could you please give some hints on how to check if my host CPU supports cmt,mbm, is it displayed in /proc/cpuinfo?
It would be listed by 'virsh capabilities' as 'cmt', or in /proc/cpuinfo as 'cqm'. You need pretty particular CPU models too - many Intel models don't support this even brand new ones.
2. Does the kernel version matters as well to support it?
Yes, but I don't recall which version Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
participants (2)
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Daniel P. Berrange -
Hui Jing