January 2012 - mpiwg-rma - mailman3.cels.anl.gov

Re: [Mpi3-rma] Fault Tolerance & RMA Discussion
by Josh Hursey 25 Jan '12

25 Jan '12

There was no one date/time that worked for everyone, but I chose a time that worked for most of the respondents. We will meet Thursday, Feb. 2 from 12-1 pm EST/New York to discuss this topic. We can use the following teleconf information: US Toll Free number: 877-801-8130 Toll number: 1-203-692-8690 Access Code: 1044056 Thanks, Josh On Mon, Jan 23, 2012 at 4:33 PM, Josh Hursey <jjhursey(a)open-mpi.org> wrote: > (Cross posted to both the RMA and FT MPI-3 listservs) > > During the FT plenary session at the Jan. MPI Forum meeting it was > recommended that some of the members of the FT group and the RMA group have > a meeting to hash out the precise details of the FT semantics for the RMA > chapter. So I would like to facilitate such a discussion, preferability in > the next week (so we have time to fine tune things before the next forum > meeting). > > In general, we are trying to answer the question "How should RMA > operations behave when a process failure occurs?" The feeling seemed to be > that the current approach is ok (invalidating the window, forcing > recreation/validation), but the statement that the memory exposed in the > window is 'undefined' seemed excessive. The suggestion was to change the > wording to something like "Only the memory associated with a window that > was targeted by an operation that modified it is undefined after process > failure in the group associated with the window." This lead to a > considerable amount of debate in the meeting, so it was suggested that we > take the discussion offline. > > Below is a link to a doodle poll to find a good time for a teleconf. If > you are interested in participating in this discussion, please fill this > poll out by 2 PM Eastern on Wed. Jan 25 so we can set the date/time. > http://www.doodle.com/vd33va5h8iankega > > Thanks, > Josh > > -- > Joshua Hursey > Postdoctoral Research Associate > Oak Ridge National Laboratory > http://users.nccs.gov/~jjhursey > -- Joshua Hursey Postdoctoral Research Associate Oak Ridge National Laboratory http://users.nccs.gov/~jjhursey

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[Mpi3-rma] Fault Tolerance & RMA Discussion
by Josh Hursey 23 Jan '12

23 Jan '12

(Cross posted to both the RMA and FT MPI-3 listservs) During the FT plenary session at the Jan. MPI Forum meeting it was recommended that some of the members of the FT group and the RMA group have a meeting to hash out the precise details of the FT semantics for the RMA chapter. So I would like to facilitate such a discussion, preferability in the next week (so we have time to fine tune things before the next forum meeting). In general, we are trying to answer the question "How should RMA operations behave when a process failure occurs?" The feeling seemed to be that the current approach is ok (invalidating the window, forcing recreation/validation), but the statement that the memory exposed in the window is 'undefined' seemed excessive. The suggestion was to change the wording to something like "Only the memory associated with a window that was targeted by an operation that modified it is undefined after process failure in the group associated with the window." This lead to a considerable amount of debate in the meeting, so it was suggested that we take the discussion offline. Below is a link to a doodle poll to find a good time for a teleconf. If you are interested in participating in this discussion, please fill this poll out by 2 PM Eastern on Wed. Jan 25 so we can set the date/time. http://www.doodle.com/vd33va5h8iankega Thanks, Josh -- Joshua Hursey Postdoctoral Research Associate Oak Ridge National Laboratory http://users.nccs.gov/~jjhursey

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Re: [Mpi3-rma] new RMA chapter and ticket #187 need to be reconciled
by Torsten Hoefler 21 Jan '12

21 Jan '12

Dave, Excellent catch, I added a note to #187 that this ticket needs to update the RMA chapter. The RMA WG should also review the proposed change (see ticket 187). Thanks & Best, Torsten On Fri, Jan 20, 2012 at 02:29:05PM -0600, Dave Goodell wrote: > If/when ticket #187 passes then we will need to update some of the RMA chapter text to include the new "Multi-language types" category. Specifically, the text for MPI_Compare_and_swap mentions the Chapter 5 reduction type groups. > > I'm just sending this to the list so that we don't forget. > > -Dave > > https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/187 > _______________________________________________ > mpi3-rma mailing list > mpi3-rma(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma > -- bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ ----- Torsten Hoefler | Performance Modeling and Simulation Lead Blue Waters Directorate | University of Illinois (UIUC) 1205 W Clark Street | Urbana, IL, 61801 NCSA Building | +01 (217) 244-7736

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[Mpi3-rma] new RMA chapter and ticket #187 need to be reconciled
by Dave Goodell 20 Jan '12

20 Jan '12

If/when ticket #187 passes then we will need to update some of the RMA chapter text to include the new "Multi-language types" category. Specifically, the text for MPI_Compare_and_swap mentions the Chapter 5 reduction type groups. I'm just sending this to the list so that we don't forget. -Dave https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/187

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