Hi Mark,
The Async result in 128K drops quickly after some point, is that because
of the testing methodology?
Other conclusion looks to me like simple messenger + Jemalloc is the best
practice till now as it has the same performance as async but using much less
memory?
-Xiaoxi
> -----Original Message-----
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Mark Nelson
> Sent: Tuesday, October 13, 2015 9:03 PM
> To: Haomai Wang
> Cc: ceph-devel; ceph-us...@lists.ceph.com
> Subject: Re: [ceph-users] Initial performance cluster SimpleMessenger vs
> AsyncMessenger results
>
> Hi Haomai,
>
> Great! I haven't had a chance to dig in and look at it with valgrind yet,
> but if I
> get a chance after I'm done with newstore fragment testing and somnath's
> writepath work I'll try to go back and dig in if you haven't had a chance yet.
>
> Mark
>
> On 10/12/2015 09:56 PM, Haomai Wang wrote:
> > resend
> >
> > On Tue, Oct 13, 2015 at 10:56 AM, Haomai Wang <haomaiw...@gmail.com>
> wrote:
> >> COOL
> >>
> >> Interesting that async messenger will consume more memory than
> >> simple, in my mind I always think async should use less memory. I
> >> will give a look at this
> >>
> >> On Tue, Oct 13, 2015 at 12:50 AM, Mark Nelson <mnel...@redhat.com>
> wrote:
> >>>
> >>> Hi Guy,
> >>>
> >>> Given all of the recent data on how different memory allocator
> >>> configurations improve SimpleMessenger performance (and the effect
> >>> of memory allocators and transparent hugepages on RSS memory usage),
> >>> I thought I'd run some tests looking how AsyncMessenger does in
> >>> comparison. We spoke about these a bit at the last performance
> meeting but here's the full write up.
> >>> The rough conclusion as of right now appears to be:
> >>>
> >>> 1) AsyncMessenger performance is not dependent on the memory
> >>> allocator like with SimpleMessenger.
> >>>
> >>> 2) AsyncMessenger is faster than SimpleMessenger with TCMalloc +
> >>> 32MB (ie
> >>> default) thread cache.
> >>>
> >>> 3) AsyncMessenger is consistently faster than SimpleMessenger for
> >>> 128K random reads.
> >>>
> >>> 4) AsyncMessenger is sometimes slower than SimpleMessenger when
> >>> memory allocator optimizations are used.
> >>>
> >>> 5) AsyncMessenger currently uses far more RSS memory than
> SimpleMessenger.
> >>>
> >>> Here's a link to the paper:
> >>>
> >>> https://drive.google.com/file/d/0B2gTBZrkrnpZS1Q4VktjZkhrNHc/view
> >>>
> >>> Mark
> >>> _______________________________________________
> >>> ceph-users mailing list
> >>> ceph-us...@lists.ceph.com
> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >>
> >>
> >>
> >>
> >> --
> >>
> >> Best Regards,
> >>
> >> Wheat
> >
> >
> >
> _______________________________________________
> ceph-users mailing list
> ceph-us...@lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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