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<br><font size=2 face="sans-serif">Michael Blocksome<br>
Blue Gene Messaging Team Lead<br>
Advanced Systems SW Development<br>
blocksom@us.ibm.com<br>
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<td width=40%><font size=1 face="sans-serif"><b>Rob Ross <rross@mcs.anl.gov></b>
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<p><font size=1 face="sans-serif">02/28/2008 01:11 PM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">Michael Blocksome/Rochester/IBM@IBMUS</font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">dcmf@lists.anl-external.org, dcmf-bounces@lists.anl-external.org,
"Rajeev Thakur" <thakur@mcs.anl.gov></font>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [dcmf] 32-bit ROMIO: What is the
best solution?</font></table>
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<br><tt><font size=2>Hi,<br>
<br>
Is someone on this list that can get that list of email addresses?<br>
<br>
Rob<br>
<br>
On Feb 28, 2008, at 12:59 PM, Michael Blocksome wrote:<br>
<br>
><br>
> ok .. mpich2-dev it is. Let's just add all of the ...<br>
><br>
> *@*.ibm.com<br>
><br>
> ... email addresses that are subscribed to the dcmf mailing list.
<br>
> If someone is not interested they could always remove themselves <br>
> from the mpich2-dev list later.<br>
><br>
> Thanks<br>
><br>
> Michael Blocksome<br>
> Blue Gene Messaging Team Lead<br>
> Advanced Systems SW Development<br>
> blocksom@us.ibm.com<br>
><br>
><br>
><br>
> Rob Ross <rross@mcs.anl.gov><br>
> 02/28/2008 12:39 PM<br>
><br>
> To<br>
> Michael Blocksome/Rochester/IBM@IBMUS<br>
> cc<br>
> dcmf@lists.anl-external.org, dcmf-bounces@lists.anl-external.org,
<br>
> "Rajeev Thakur" <thakur@mcs.anl.gov><br>
> Subject<br>
> Re: [dcmf] 32-bit ROMIO: What is the best solution?<br>
><br>
><br>
><br>
><br>
><br>
> Rajeev had suggested this too. Let's go with mpich2-dev. Can you give<br>
> us a list of people that should be added to the list?<br>
><br>
> Thanks,<br>
><br>
> Rob<br>
><br>
> On Feb 28, 2008, at 12:29 PM, Michael Blocksome wrote:<br>
><br>
> ><br>
> > I agree .. we need to get over the discussion about the discussion<br>
> > as fast as possible. :)<br>
> ><br>
> > The dcmf list has worked well, but I think we started using it<br>
> > because there were no alternatives to the issue at hand. Given
that<br>
> > the mpich2 and global arrays communities have different licenses,<br>
> > our long term direction for the dcmf community should be to support<br>
> > the dcmf library and move discussion of other "external"
libraries<br>
> > (like mpich2 and global arrays) into thier communities.<br>
> ><br>
> > I just noticed that there is a mpich2-dev@mcs.anl.gov mailing
list<br>
> > already set up. Could we use this list to collaborate on
the mpich2<br>
> > implementation?<br>
> ><br>
> > Michael Blocksome<br>
> > Blue Gene Messaging Team Lead<br>
> > Advanced Systems SW Development<br>
> > blocksom@us.ibm.com<br>
> ><br>
> ><br>
> > Rob Ross <rross@mcs.anl.gov> wrote on 02/28/2008 12:17:06
PM:<br>
> ><br>
> > > Hi,<br>
> > ><br>
> > > We've been using the DCMF list for all sorts of things that
aren't<br>
> > > directly related to DCMF without any issues (as far as I
know); it<br>
> > has<br>
> > > become the successful technical communication path between
IBM and<br>
> > ANL<br>
> > > so far.<br>
> > ><br>
> > > However, if you'd like to create a separate list for discussing<br>
> > this,<br>
> > > we can do that. Is that what you would like to do? If so,
can you<br>
> > give<br>
> > > us a list of people on the IBM side that should be on the
new <br>
> list?<br>
> > > I'd like to be done discussing where we're going to talk
about <br>
> this<br>
> > > issue ASAP and concentrate on fixing it.<br>
> > ><br>
> > > Thanks,<br>
> > ><br>
> > > Rob<br>
> > ><br>
> > > On Feb 28, 2008, at 11:18 AM, Michael Blocksome wrote:<br>
> > ><br>
> > > ><br>
> > > > Unfortunately, this MPI_Aint discussion really has
nothing to do<br>
> > > > with DCMF. The entrire problem and solution is
with MPICH2.<br>
> > > ><br>
> > > > Is there another, less broad, mpich mailing list that
we could<br>
> > use?<br>
> > > > Maybe a "mpich-development" or something
like that?<br>
> > > ><br>
> > > > Michael Blocksome<br>
> > > > Blue Gene Messaging Team Lead<br>
> > > > Advanced Systems SW Development<br>
> > > > blocksom@us.ibm.com<br>
> > > ><br>
> > > ><br>
> > > > dcmf-bounces@lists.anl-external.org wrote on 02/28/2008
11:01:09<br>
> > AM:<br>
> > > ><br>
> > > > > I'd say this mailing list is better for it right
now. Posting<br>
> > on the<br>
> > > > > broader mpich-discuss might just distract us.<br>
> > > > ><br>
> > > > > Rajeev<br>
> > > > ><br>
> > > > > From: dcmf-bounces@lists.anl-external.org [mailto:dcmf-<br>
> > > > > bounces@lists.anl-external.org] On Behalf Of Bob
Cernohous<br>
> > > > > Sent: Wednesday, February 27, 2008 4:19 PM<br>
> > > > > To: dcmf@lists.anl-external.org<br>
> > > > > Subject: Re: [dcmf] 32-bit ROMIO: What is the
best solution?<br>
> > > ><br>
> > > > ><br>
> > > > > bobc@us.ibm.com wrote on 02/08/2008 02:41:40 PM:<br>
> > > > ><br>
> > > > > >We all realize there are issues with MPI_Aint's
in 32 bit<br>
> > > > implementations.<br>
> > > > > >Using signed 32 bit addresses along with 64
bit offsets can<br>
> > > > result in<br>
> > > > > >some pretty broken code. I've reproduced
several problems on<br>
> > > > > >BGL/BGP/linux. The problems are most
obvious with romio<br>
> > files ><br>
> > > > 2G or<br>
> > > > > >virtual addresses > 2G.<br>
> > > > ><br>
> > > > > Earlier this month I posted some comments to this
mailing list<br>
> > about<br>
> > > > > 32-bit MPICH/ROMIO/MPI_Aint issues (see above
and the <br>
> archive).<br>
> > > > ><br>
> > > > > We've started to work on the problem. We're
(optionally)<br>
> > making<br>
> > > > > MPI_Aint a 64 bit signed value even when integers/pointers
are<br>
> > 32<br>
> > > > bit<br>
> > > > > values.<br>
> > > > ><br>
> > > > > We'd like to start sending fix patches to the
community for<br>
> > comment.<br>
> > > > ><br>
> > > > > However, since we are (in parallel) contributing
our BGP code<br>
> > back<br>
> > > > > to MPICH and trying to converge on a common code
base of <br>
> 1.0.7,<br>
> > > > > and because this problem applies to any 32-bit
platform,<br>
> > > > > we thought we should move the discussion to mpich-discuss
to <br>
> get<br>
> > > > > the larger community's comments.<br>
> > > > ><br>
> > > > > It's unlikely, at this point, that our patches
would apply to<br>
> > > > MPICH2,<br>
> > > > > but that is our goal after the 1.0.7/BGP patch
settles. For<br>
> > now,<br>
> > > > we'd<br>
> > > > > be sending these as RFC (request for comment)
patches.<br>
> > > > ><br>
> > > > > Please let us know if you agree with discussing
this on mpich-<br>
> > > > discuss,<br>
> > > > > or if there is a better place.<br>
> > > > ><br>
> > > > > Bob Cernohous: (T/L 553) 507-253-6093<br>
> > > > ><br>
> > > > > BobC@us.ibm.com<br>
> > > > > IBM Rochester, Building 030-2(C335), Department
61L<br>
> > > > > 3605 Hwy 52 North, Rochester, MN 55901-7829<br>
> > > > ><br>
> > > > > > Chaos reigns within.<br>
> > > > > > Reflect, repent, and reboot.<br>
> > > > > > Order shall<br>
> > return._______________________________________________<br>
> > > > > dcmf mailing list<br>
> > > > > dcmf@lists.anl-external.org<br>
> > > > > http://lists.anl-external.org/cgi-bin/mailman/listinfo/dcmf<br>
> > > > > http://dcmf.anl-external.<br>
> > > org/wiki_______________________________________________<br>
> > > > dcmf mailing list<br>
> > > > dcmf@lists.anl-external.org<br>
> > > > http://lists.anl-external.org/cgi-bin/mailman/listinfo/dcmf<br>
> > > > http://dcmf.anl-external.org/wiki<br>
> > ><br>
><br>
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