[openstack-dev] [neutron][rootwrap] Performance considerations, sudo?

Thierry Carrez thierry at openstack.org
Fri Mar 21 10:01:25 UTC 2014

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 ?)


Thierry Carrez (ttx)

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