On Mon, Jul 07, 2014 at 08:33:50PM +0400, Andrey Korolyov wrote: > On Mon, Jul 7, 2014 at 7:15 PM, Ben Pfaff <b...@nicira.com> wrote: > > On Fri, Jul 04, 2014 at 09:02:40PM +0400, Andrey Korolyov wrote: > >> On Fri, Jul 4, 2014 at 8:39 PM, Ben Pfaff <b...@nicira.com> wrote: > >> > On Fri, Jul 04, 2014 at 02:39:18PM +0400, Andrey Korolyov wrote: > >> >> is there any plans around to introduce built-in performance statistics > >> >> for userspace switch process? Right now one is able to check memory > >> >> consumption statistics and it will be quite awesome to introduce kind > >> >> of interface for measurement of thread performance too. > >> > > >> > We have performance counters. What do you want to measure? > >> > >> For example, total cpu utilization by workers not involving external > >> monitoring tools. There are two cases - reactive flows, which > >> currently have almost linear characteristic for utilization vs flow > >> rate when adding unique flows on moderate speed (30k/s with six cores > >> of E5 series as a ceiling), and proactive mask/asterisk flows which > >> has sublinear characteristic even being far away from the actual > >> ceiling. In the second case vswitchd heavily relies on decisions made > >> inside module` heuristic, so same flow hit rate can produce very > >> different cpu utilization for userspace vswitchd. > > > > I'm not sure how OVS would do a better job of that than external > > monitoring tools. Doing a good job would probably mean producing a time > > series for each thread's CPU usage. A regular log file isn't ideal for > > that. > > Ok, I see. Jiffie counting is a pidstat job, but I thought that there > is a easier way around.
Are you talking about performance monitoring for work done in the kernel module (e.g. from bottom halves etc.)? I'm only talking about userspace. I don't know the relevant kernel performance monitoring infrastructure and can't speak for the right way to do it. _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
