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

Yuriy Taraday yorik.sar at gmail.com
Thu Mar 20 16:07:17 UTC 2014

On Thu, Mar 20, 2014 at 7:28 PM, Rick Jones <rick.jones2 at hp.com> wrote:

> On 03/20/2014 05:41 AM, 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".
> Interesting result.  Which versions of sudo and ip and with how many
> interfaces on the system?

Here are the numbers:

% sudo -V
Sudo version 1.8.6p7
Sudoers policy plugin version 1.8.6p7
Sudoers file grammar version 42
Sudoers I/O plugin version 1.8.6p7
% ip -V
ip utility, iproute2-ss130221
% ip a | grep '^[^ ]' | wc -l

> For consistency's sake (however foolish it may be) and purposes of others
> being able to reproduce results and all that, stating the number of
> interfaces on the system and versions and such would be a Good Thing.

Ok, I'll add them to benchmark output.


Kind regards, Yuriy.
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