RE: perf counters from a performance discrepancy

2015-10-08 Thread Deneau, Tom
> -Original Message- > From: Sage Weil [mailto:sw...@redhat.com] > Sent: Wednesday, October 07, 2015 9:48 PM > To: Deneau, Tom > Cc: Mark Nelson; Gregory Farnum; ceph-devel@vger.kernel.org > Subject: RE: perf counters from a performance discrepancy > > > I fi

RE: perf counters from a performance discrepancy

2015-10-08 Thread Sage Weil
On Thu, 8 Oct 2015, Deneau, Tom wrote: > > -Original Message- > > From: Sage Weil [mailto:sw...@redhat.com] > > Sent: Wednesday, October 07, 2015 9:48 PM > > To: Deneau, Tom > > Cc: Mark Nelson; Gregory Farnum; ceph-devel@vger.kernel.org > > Subject:

RE: perf counters from a performance discrepancy

2015-10-08 Thread Somnath Roy
evel-ow...@vger.kernel.org] On Behalf Of Sage Weil Sent: Thursday, October 08, 2015 8:56 AM To: Deneau, Tom Cc: Mark Nelson; Gregory Farnum; ceph-devel@vger.kernel.org Subject: RE: perf counters from a performance discrepancy On Thu, 8 Oct 2015, Deneau, Tom wrote: > > -Original Message

RE: perf counters from a performance discrepancy

2015-10-07 Thread Deneau, Tom
> -Original Message- > From: Deneau, Tom > Sent: Wednesday, September 23, 2015 3:05 PM > To: 'Mark Nelson'; Gregory Farnum; Sage Weil > Cc: ceph-devel@vger.kernel.org > Subject: RE: perf counters from a performance discrepancy > > > > > -Original M

RE: perf counters from a performance discrepancy

2015-10-07 Thread Sage Weil
> I finally got around to looking at the dump_historic_ops output for the > 1-client and 2-client cases. > As you recall these are all read-ops. so the events in the dump are >initiated >reached_pg >started >done > > The pattern I see for most of the slow ops recorded in the

perf counters from a performance discrepancy

2015-09-23 Thread Deneau, Tom
Hi all -- Looking for guidance with perf counters... I am trying to see whether the perf counters can tell me anything about the following discrepancy I populate a number of 40k size objects in each of two pools, poolA and poolB. Both pools cover osds on a single node, 5 osds total. *

Re: perf counters from a performance discrepancy

2015-09-23 Thread Gregory Farnum
On Wed, Sep 23, 2015 at 11:19 AM, Sage Weil wrote: > On Wed, 23 Sep 2015, Deneau, Tom wrote: >> Hi all -- >> >> Looking for guidance with perf counters... >> I am trying to see whether the perf counters can tell me anything about the >> following discrepancy >> >> I populate a

Re: perf counters from a performance discrepancy

2015-09-23 Thread Mark Nelson
On 09/23/2015 01:25 PM, Gregory Farnum wrote: On Wed, Sep 23, 2015 at 11:19 AM, Sage Weil wrote: On Wed, 23 Sep 2015, Deneau, Tom wrote: Hi all -- Looking for guidance with perf counters... I am trying to see whether the perf counters can tell me anything about the

Re: perf counters from a performance discrepancy

2015-09-23 Thread Sage Weil
On Wed, 23 Sep 2015, Deneau, Tom wrote: > Hi all -- > > Looking for guidance with perf counters... > I am trying to see whether the perf counters can tell me anything about the > following discrepancy > > I populate a number of 40k size objects in each of two pools, poolA and poolB. > Both

RE: perf counters from a performance discrepancy

2015-09-23 Thread Deneau, Tom
Sage Weil; ceph-devel@vger.kernel.org > Subject: Re: perf counters from a performance discrepancy > > Just to eliminate a variable, can you reproduce this on master, first with > the simple messenger, and then with the async messenger? (make sure to > switch the messengers on all

RE: perf counters from a performance discrepancy

2015-09-23 Thread Deneau, Tom
> -Original Message- > From: Gregory Farnum [mailto:gfar...@redhat.com] > Sent: Wednesday, September 23, 2015 3:39 PM > To: Deneau, Tom > Cc: ceph-devel@vger.kernel.org > Subject: Re: perf counters from a performance discrepancy > > On Wed, Sep 23, 2015 at 9:33

Re: perf counters from a performance discrepancy

2015-09-23 Thread Samuel Just
, Tom <tom.den...@amd.com> wrote: > > >> -Original Message- >> From: Mark Nelson [mailto:mnel...@redhat.com] >> Sent: Wednesday, September 23, 2015 1:43 PM >> To: Gregory Farnum; Sage Weil >> Cc: Deneau, Tom; ceph-devel@vger.kernel.org >> Subject:

RE: perf counters from a performance discrepancy

2015-09-23 Thread Deneau, Tom
> -Original Message- > From: Mark Nelson [mailto:mnel...@redhat.com] > Sent: Wednesday, September 23, 2015 1:43 PM > To: Gregory Farnum; Sage Weil > Cc: Deneau, Tom; ceph-devel@vger.kernel.org > Subject: Re: perf counters from a performance discrepancy > > >

Re: perf counters from a performance discrepancy

2015-09-23 Thread Gregory Farnum
On Wed, Sep 23, 2015 at 9:33 AM, Deneau, Tom wrote: > Hi all -- > > Looking for guidance with perf counters... > I am trying to see whether the perf counters can tell me anything about the > following discrepancy > > I populate a number of 40k size objects in each of two

Re: perf counters from a performance discrepancy

2015-09-23 Thread Gregory Farnum
On Wed, Sep 23, 2015 at 1:51 PM, Deneau, Tom wrote: > > >> -Original Message- >> From: Gregory Farnum [mailto:gfar...@redhat.com] >> So if you've got 20k objects and 5 OSDs then each OSD is getting ~4k reads >> during this test. Which if I'm reading these properly