[ovirt-devel] XML benchmarks

[Francesco Romani]

----- Original Message -----
> From: "Nir Soffer" <nsoffer at redhat.com>
> To: "Francesco Romani" <fromani at redhat.com>
> Cc: devel at ovirt.org, "Martin Sivak" <msivak at redhat.com>
> Sent: Sunday, June 29, 2014 10:34:08 AM
> Subject: Re: [ovirt-devel] XML benchmarks

> > CPU measurement: just opened a terminal and run 'htop' on it.
> > CPU profile: clustered around the sampling interval. Usage negligible most
> > of
> > time, peak on sampling as shown below
> > 
> > 300 VMs
> > minidom: ~38% CPU
> > cElementTree: ~5% CPU
> 
> What is 38% - (38% of one core? how may cores are on the machine?)

4 cores: 2 physical, 2 logical. I'm prepping a more precise test
using a better and less ambiguous indicator.
 

> Seeing this load created by parsing libvirt xml every 15 seconds, I think
> we should consider decreasing the sample rate suggested in
> http://gerrit.ovirt.org/28712 Or collecting the data in another way.

To collect the data in another way, maybe just after the event which will
trigger the change would be the best way. As last resort, to move te code
to use cElementTree.

Bests,

-- 
Francesco Romani
RedHat Engineering Virtualization R & D
Phone: 8261328
IRC: fromani