[ovirt-devel] XML benchmarks

[Francesco Romani]

----- Original Message -----
> From: "Francesco Romani" <fromani at redhat.com>
> To: "Nir Soffer" <nsoffer at redhat.com>
> Cc: devel at ovirt.org
> Sent: Monday, June 30, 2014 8:47:15 AM
> Subject: Re: [ovirt-devel] XML benchmarks
> 
> ----- 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.

Here. Attached un updated script (xmlbench2.py) which uses 'psutil'
(https://pypi.python.org/pypi/psutil) to gather the samples.

CPU sampled each 500ms (half a second). 100% is one core.
My laptop reports 4 core (dualcore with hyperthreading).

See attached some graphs for easier comsumption and their gnuplot recipe.

cpu_300t_3m.png: load using the test script with 300 threads, each thread runs ~3 minutes
cpu_500t_3m.png: load using the test script with 500 threads, each thread runs ~3 minutes

sampling is not really accurate but it is more than enough to get an idea.

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