[Mpi-forum] Merged Nonblocking Collectives into MPI-3 - Please Review!

Rolf Rabenseifner rabenseifner at hlrs.de
Tue Feb 16 04:11:57 CST 2010

Hello Torsten, Jeff and Rich,

I'm sorry that I could not attend the discussion at last meeting.
Jeff's minutes are not yet available, therefore my opinion may
be in contrary to votes at the meeting - then please tell me.

My opinion after looking at ticket 254, file chap-coll/coll.tex :

I strongly disagree with the current state of the latex source.
You reinvented all the old MPI-2.2  markups, i.e., you uncleaned
the tex source of exactly one file: coll.tex.

All MPI-2.2 markups are removed to allow the usage of Bills
macros to mark all new MPI-3.0 changes.
I could not find any \MPIupdate{3.0}... or similar markups
in your new source.

The 73 changes (found be grep'ing "htor") should be done
into "current" coll.tex revision 253 and not into a very old revision.

There is no chance to do the cleaning again on your current
unclean coll.tex revision 254!

All these 73 changes should be marked with Bill's macros
as ticket {3.0}{109}.

If the forum decided to step back to the uncleaned source
then it should be done for all sources and not only
for coll.tex.

Rich and Jeff, I cannot see any comments on ticket #203,
nor any review from you.
Did you discussed it at the Jan 2010 meeting?

Best regards

On Mon, 15 Feb 2010 14:15:39 -0600
  Torsten Hoefler <htor at cs.indiana.edu> wrote:
> Hello Forum,
> I finished my merger of NBC into MPI-3 as we discussed at the last
> meeting. I did the merge in the following order:
> 1) I merged all MPI-2.2 changes into NBC rev. 6 (the version that we
>   voted into MPI-3, attached to #109). This was a relatively
>   straightforward manual process. 
> 2) I merged the combined document into the MPI-3 tree. This was much
>   more complex than anticipated because the MPI-3 tree is "cleaned 
>   (i.e., many change-macros are gone) and after discussion with 
>   we realized that the script could not be applied to separate
>   chapters. This, I performed a manual cleanup and removed the 
>   macros in this process. This was not as simple as 1) and seems 
>   error-prone. 
> 3) I re-read and compared the colored MPI-2.2 document and the MPI-3
>   document and committed it as rev. 524.
> The ability to highlight the changes between the revisions 
> the MPI-2.2 changes) were important for the merger. Bill did a great 
> making those extremely helpful for my review. I would suggest that 
> use the same or a similar mechanism for MPI-3. Right now, I left all 
> (b/w) change-macros (\htorchange, defined at the bottom of 
> in the source so that we can see what changed after MPI-2.2. I would
> volunteer to transition them to a new mechanism based on whatever we
> decide.
> Please review the document carefully, the changes that I made were 
> minor and much more intrusive then all MPI-2.2 changes to the
> collectives chapter. It would be good to have some designated 
> reviewers, any volunteers? 
> I think we strived to have reviews at the March meeting and I was
> supposed to deliver a draft two weeks in advance. Now we have three
> weeks left. That is not very long imho, so we might consider to move 
> review deadline.
> Here are some things that I added which we did not explicitly vote 
> (however, they are minor and straight-forward from our past votes):
> 1) fixed some typos (missing ")" and removed some spaces where 
>   appropriate (see svn diff)
> 2) added MPI_Reduce_scatter to various lists in the introduction of
>   Chapter 5 (this is a bug in MPI-2.2)
> 3) added MPI_Ireduce_scatter_block to the listing of nonblocking
>   collectives. Please review the function interface carefully! This 
>   not voted on or reviewed yet.
> 4) added a \label{} in the p2p Chapter 3 to reference nonblocking
>   progression semantics (they're referenced nowhere else ;-)).
> I put two versions of the document online for easier reviewing. Both
> versions have the MPI-2.2 changes highlighted (purple for removals, 
> for additions plus the ticket number at the margin) and also the 
> changes (striked out for removals, underlined for additions, limited 
> Chapter 5).
> MPI-2.2: http://www.unixer.de/sec/mpi-2.2.pdf
> MPI-3.0: http://www.unixer.de/sec/mpi-3.0.pdf
> It should be sufficient to review Chapter 5 only. Please let me know 
> you have any questions or find any problems.
> All the Best,
>  Torsten
> -- 
> bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ -----
> Torsten Hoefler         | Research Associate
> Blue Waters Directorate | University of Illinois
> 1205 W Clark Street     | Urbana, IL, 61801
> NCSA Building           | +01 (217) 244-7736
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Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner at hlrs.de
High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530
University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832
Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner
Nobelstr. 19, D-70550 Stuttgart, Germany . (Office: Allmandring 30)

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