Re: [ceph-users] Initial performance cluster SimpleMessenger vs AsyncMessenger results

[Mark Nelson <mnelson@redhat.com>]

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 <haomaiwang@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 <mnelson@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-users@lists.ceph.com
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>>
>>
>>
>> --
>>
>> Best Regards,
>>
>> Wheat
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