It's the first call starting the daemon / loading config files, etc?,
May be that first sample should be discarded from the mean for all
processes (it's an outlier value).
On 03/21/2014 05:32 PM, Yuriy Taraday wrote:
On Fri, Mar 21, 2014 at 2:01 PM, Thierry Carrez <thie...@openstack.org
<mailto:thie...@openstack.org>> wrote:
Yuriy Taraday wrote:
> Benchmark included showed on my machine these numbers (average
over 100
> iterations):
>
> Running 'ip a':
> ip a : 4.565ms
> sudo ip a : 13.744ms
> sudo rootwrap conf ip a : 102.571ms
> daemon.run('ip a') : 8.973ms
> Running 'ip netns exec bench_ns ip a':
> sudo ip netns exec bench_ns ip a : 162.098ms
> sudo rootwrap conf ip netns exec bench_ns ip a : 268.115ms
> daemon.run('ip netns exec bench_ns ip a') : 129.876ms
>
> So it looks like running daemon is actually faster than running
"sudo".
That's pretty good! However I fear that the extremely simplistic filter
rule file you fed on the benchmark is affecting numbers. Could you post
results from a realistic setup (like same command, but with all the
filter files normally found on a devstack host ?)
I don't have a devstack host at hands but I gathered all filters from
Nova, Cinder and Neutron and got this:
method : min avg max dev
ip a : 3.741ms 4.443ms 7.356ms 500.660us
sudo ip a : 11.165ms 13.739ms 32.326ms 2.643ms
sudo rootwrap conf ip a : 100.814ms 125.701ms 169.048ms 16.265ms
daemon.run('ip a') : 6.032ms 8.895ms 172.287ms 16.521ms
Then I switched back to one file and got:
method : min avg max dev
ip a : 4.176ms 4.976ms 22.910ms 1.821ms
sudo ip a : 13.240ms 14.730ms 21.793ms 1.382ms
sudo rootwrap conf ip a : 79.834ms 104.586ms 145.070ms 15.063ms
daemon.run('ip a') : 5.062ms 8.427ms 160.799ms 15.493ms
There is a difference but it looks like it's because of config files
parsing, not applying filters themselves.
--
Kind regards, Yuriy.
_______________________________________________
OpenStack-dev mailing list
OpenStack-dev@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
_______________________________________________
OpenStack-dev mailing list
OpenStack-dev@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
