Messages in this thread | | | Subject | Re: [PATCH RFC 0/2] Optimize the snmp stat aggregation for large cpus | From | Eric Dumazet <> | Date | Tue, 25 Aug 2015 07:33:51 -0700 |
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On Tue, 2015-08-25 at 13:24 +0530, Raghavendra K T wrote: > While creating 1000 containers, perf is showing lot of time spent in > snmp_fold_field on a large cpu system. > > The current patch tries to improve by reordering the statistics gathering. > > Please note that similar overhead was also reported while creating > veth pairs https://lkml.org/lkml/2013/3/19/556 > > Setup: > 160 cpu (20 core) baremetal powerpc system with 1TB memory
I wonder if these kind of results would demonstrate cache coloring problems on this host. Looks like all the per cpu data are colliding on same cache lines.
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