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Subject: Re: [OMPI devel] RFC: libevent update
From: Josh Hursey (jjhursey_at_[hidden])
Date: 2008-03-18 16:16:40


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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