[Pvfs2-users] Re: PVFS2 over infiniband: pvfs2-client-core uses up
vsk at fluent.co.in
Tue Aug 29 07:35:07 EDT 2006
I think what I saw yesterday was that after I had run some benchmarks on
pvfs2-IB, the pvfs2-client-core was showing 100% cpu activity for a
couple of hours after that. Things are fine today.
Im running pvfs2-1.5.1.
Pete Wyckoff wrote:
> vsk at fluent.co.in wrote on Mon, 28 Aug 2006 21:10 +0530:
>> The pvfs2-IB cluster is up finally and there is some speedup as compared
>> to a pvfs2-TCP setup on a different cluster. But Im seeing one strange
>> thing on the IB setup: the pvfs2-client-core is using up 100% CPU even
>> in the absence of file-system activity. I saw on pvfs2 FAQs one entry
>> related to pvfs2-server CPU usage, but none related to
>> pvfs2-client-core. Have other people run into a similar problem? Note
>> that on the pvfs2-TCP cluster, which is similarly configured except for
>> not having Infiniband, pvfs2-client-core is quite well behaved.
> Haven't seen the client-core consuming 100% cpu yet. I'm running
> your setup here and it's idle except during transfers. Can you
> verify that the client-core chews a full CPU as soon as it is
> started up? Or if you have to do use the file system for a while
> before it goes into this mode? I'm trying to understand what could
> be causing it.
> Actually I'm just finding a bug in the pvfs2-IB polling method now
> that may add _server_ load, not sure about client; I'll let you know
> when I've got it figured out. Please tell me again which version of
> PVFS2 you're running? CVS Head or one of the releases?
> -- Pete
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