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Subject: Re: [OMPI devel] RFC: libevent update
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-03-18 16:24:29


Crud, ok. Keep us posted.

On Mar 18, 2008, at 4:16 PM, Josh Hursey wrote:

> I'm testing with checkpoint/restart and the new libevent seems to be
> messing up the checkpoints generated by BLCR. I'll be taking a look
> at it over the next couple of days, but just thought I'd let people
> know. Unfortunately I don't have any more details at the moment.
>
> -- Josh
>
> On Mar 17, 2008, at 2:50 PM, Jeff Squyres wrote:
>
>> WHAT: Bring new version of libevent to the trunk.
>>
>> WHY: Newer version, slightly better performance (lower overheads /
>> lighter weight), properly integrate the use of epoll and other
>> scalable fd monitoring mechanisms.
>>
>> WHERE: 98% of the changes are in opal/event; there's a few changes to
>> configury and one change to the orted.
>>
>> TIMEOUT: COB, Friday, 21 March 2008
>>
>> DESCRIPTION:
>>
>> George/UTK has done the bulk of the work to integrate a new version
>> of
>> libevent on the following tmp branch:
>>
>> https://svn.open-mpi.org/svn/ompi/tmp-public/libevent-merge
>>
>> ** WE WOULD VERY MUCH APPRECIATE IF PEOPLE COULD MTT TEST THIS
>> BRANCH!
>> **
>>
>> Cisco ran MTT on this branch on Friday and everything checked out
>> (i.e., no more failures than on the trunk). We just made a few more
>> minor changes today and I'm running MTT again now, but I'm not
>> expecting any new failures (MTT will take several hours). We would
>> like to bring the new libevent in over this upcoming weekend, but
>> would very much appreciate if others could test on their platforms
>> (Cisco tests mainly 64 bit RHEL4U4). This new libevent *should* be a
>> fairly side-effect free change, but it is possible that since we're
>> now using epoll and other scalable fd monitoring tools, we'll run
>> into
>> some unanticipated issues on some platforms.
>>
>> Here's a consolidated diff if you want to see the changes:
>>
>> https://svn.open-mpi.org/trac/ompi/changeset?old_path=tmp-public%
>> 2Flibevent-merge&old=17846&new_path=trunk&new=17842
>>
>> Thanks.
>>
>> --
>> Jeff Squyres
>> Cisco Systems
>>
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>
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-- 
Jeff Squyres
Cisco Systems