Re: speed decrease since firefly,giant,hammer the 2nd try

[Alexandre DERUMIER <aderumier@odiso.com>]

> 
> mhm i installed librbd1-dbg and librados2-dbg - but the output still 
> looks useless to me. Should i upload it somewhere? 

>>Meh, if it's all just symbols it's probably not that helpful. 

Last Time I have done perf, even with all debug packages (ceph debug package, kernel debug, libc6 debug package,..)

I have remaining unresolved symbols

Sage Have run my perf report through c++filt, to have missing symbols.

see here:

http://article.gmane.org/gmane.comp.file-systems.ceph.devel/22089/match=client+cpu+usage+kbrd+vs+librbd+perf+report


----- Mail original -----
De: "Mark Nelson" <mnelson@redhat.com>
À: "Stefan Priebe" <s.priebe@profihost.ag>, "ceph-devel" <ceph-devel@vger.kernel.org>
Envoyé: Mardi 10 Février 2015 22:38:07
Objet: Re: speed decrease since firefly,giant,hammer the 2nd try

On 02/10/2015 03:11 PM, Stefan Priebe wrote: 
> 
> mhm i installed librbd1-dbg and librados2-dbg - but the output still 
> looks useless to me. Should i upload it somewhere? 

Meh, if it's all just symbols it's probably not that helpful. 

I've summarized your results here: 

1 concurrent 4k write (libaio, direct=1, iodepth=1) 

IOPS Latency 
wb on wb off wb on wb off 
dumpling 10870 536 ~100us ~2ms 
firefly 10350 525 ~100us ~2ms 

So in single op tests dumpling and firefly are far closer. Now let's 
see each of these cases with iodepth=32 (still 1 thread for now). 

Mark 

> 
> Stefan 
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