July 2010 - mpi-forum - mailman3.cels.anl.gov

MPI-3-Forum meeting in Stuttgart - Hotel reservation
by Rolf Rabenseifner 29 Jul '10

29 Jul '10

To all of you, who send me an email with your EuroMPI and/or MPI Forum meeting information, I sent out the list of participants. Caution: If you did not received this previous direct email with the attached list and you want to come and to have a hotel reservation then please answer ****NOW***. Best regards Rolf ----- Original Message ----- > From: "Rolf Rabenseifner" <rabenseifner(a)hlrs.de> > To: "Main MPI Forum mailing list" <mpi-forum(a)lists.mpi-forum.org> > Sent: Thursday, July 8, 2010 10:30:57 AM > Subject: MPI-3-Forum meeting in Stuttgart - please reply ASAP > > Important hotel deadline: July 30, 2010. > Therefore, please reply to me directly __now__ > although your approval/paper work is not yet set up or finished. > > Dear MPI-Forum member, > > if you plan to come or not to come to the MPI Forum meeting > in Stuttgart, Sep. 16-18, 2010, please send me a > reply directly to rabenseifner(a)hlrs.de . > Please do not wait, until your paperwork is done. > > My apologies that I could not ask you directly at the last > meeting - therefore now as email. Your soon reply helps > our administration and me. > > The hotel is the same as for the EuroMPI Conference > and is optimally located, i.e., on our campus, > location of EuroMPI, 15 minutes walk to HLRS (location > of the Forum meeting), and with light rail connection > directly from/to Stuttgart Airport (17 min), and also > to the main railway station (11 min). > > Please tell/choose: > > Name: ___ > YES/NO - I plan to attend the EuroMPI 2010 Conference (Sep. 12-15) > YES/NO - I plan to attend the MPI-3 Forum meeting (Sep. 16-18) > > My planned stay at Stuttgart will be > arrival date: ___ > departure date: ___ > number of nights: __ > > About the hotel, please choose one option: > - I have already registered for the conference hotel > within my EuroMPI conference registration process > - I have not yet registered, but I plan to come and plan > to stay in the proposed hotel. > In this case, please tell me your preferred type of room: > -- single: 74 Euro (Mon-Fri), 57 Euro (Sat, Sun) > -- double: 91 Euro (Mon-Fri), 70 Euro (Sat, Sun) > Prices per night and room, includes breakfast (same prices as for > EuroMPI). > If I have to cancel my plan, I'll inform you as soon as possible. > - I plan to come but plan to use other accommodation. > - I plan __not__ to come. > - Other: ____ > > Please type in your business address: ______ > > Further details: > ---------------- > > EuroMPI 2010 web page: http://www.eurompi2010.org/ > The conference will be located in the hotel. > > MPI Forum meetings: > http://meetings.mpi-forum.org/Meeting_details.php > > MPI Forum meeting location: > HLRS ( http://www.hlrs.de/ ), Seminar room, > Allmandring 30, 70569 Stuttgart, Germany. > > Map with all locations: > http://maps.google.com/maps/ms?ie=UTF8&hl=de&msa=0&msid=1155291267861482270… > (please take care that your browser takes the whole URL) > > Hotel web site: > http://www.commundo-tagungshotels.de/en/stuttgart/overview-stuttgart.html > > Meeting Cost: > $125 (not yet fixed) per person to cover meeting logistics costs. > > Travel information: > Best is to fly in to Stuttgart Airport (STR, which is connected > to most European hubs), e.g., flying directly from US to > Frankfurt, Munich or Zurich with a connecting flight to Stuttgart > (e.g., with Lufthansa, or Swiss). > At the airport, you can use all "S-Bahn"s in the direction to > Stuttgart (with final destinations Backnang or Schorndorf) > leaving every 10/20 minutes 5:08am :18, :38, :48 until 10:08pm > and then every 30 min until 0:08am. > > Another option is to use the only one direct USA-Stuttgart flight > which is from Atlanta to Stuttgart (Delta). > From Stuttgart Airport to the hotel, the best and cheapest way is > the "S-Bahn", our light rail system that directly connects the > airport with "Stuttgart University" station (17 minutes ride). > This station is 2 minutes from the hotel and about a 15 minutes > walk from HLRS. > > A third option is to fly in to Frankfurt and to use the train to > come to Stuttgart "Hauptbahnhof" (main station). The main station > is also directly connected with "Stuttgart University" (11 min ride). > (This third option may cause trouble because of ongoing > construction work at the main railway station and therefore > late or missed trains to Frankfurt!) > > Best regards and thank you for your help in organizing this meeting > Rolf -- Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)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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Re: [Mpi-forum] MPI load data to multiple nodes
by N.M. Maclaren 13 Jul '10

13 Jul '10

On Jul 13 2010, Jack Bryan wrote: > > Dear All, I am working on a multi-computer Open MPI cluster system. If I > put some data files in /home/mypath/folder, is it possible that all > non-head nodes can access the files in the folder ? I need to load some > data to some nodes, if all nodes can access the data, I do not need to > load them to each node one by one. If multiple nodes access the same file > to get data, is there conflict ? For example, fopen(myFile) by node 1, at > the same time fopen(myFile) by node 2. Is it allowed to do that on MPI > cluster without conflict ? Any help is appreciated. This forum is for discussion of the MPI specification and related issues, and that is a question about your operating system and the way that the administrator has set up the cluster. The answer is "maybe", with brass knobs on, and some of us could describe the issues for hours. From an MPI viewpoint, MPI_Bcast is your friend. Regards, Nick Maclaren.

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Re: [Mpi-forum] Integrating parallel and serial code
by Graham, Richard L. 13 Jul '10

13 Jul '10

Done On 7/12/10 5:32 PM, "Dave Goodell" <goodell(a)mcs.anl.gov> wrote: I'm not sure who controls it (Rich/Jeff?), but it might help to put some text in the "About mpi-forum" field on the list subscription page to keep these sorts of questions from happening as frequently. It's currently blank. http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum -Dave On Jul 12, 2010, at 4:21 PM CDT, Richard Treumann wrote: > > This reflector is for discussion of the MPI Standard. The Forum is working on extending the standard and this is part of how we communicate. It is not a user question list. > > The simple answer is that MPI execute several distinct copies of a program and provides the tools to let the program author break up the work over these several copies. The program author breaks up the work into many pieces and uses MPI to move data among the several pieces. > > There are many MPI Tutorial on the Web and you should probably begin there. > > > Dick Treumann - MPI Team > IBM Systems & Technology Group > Dept X2ZA / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 > Tele (845) 433-7846 Fax (845) 433-8363 > > > > From: Michael Morrison <mwmorrison93(a)gmail.com> > To: mpi-forum(a)lists.mpi-forum.org > Date: 07/12/2010 05:06 PM > Subject: [Mpi-forum] Integrating parallel and serial code > Sent by: mpi-forum-bounces(a)lists.mpi-forum.org > > > > > Hi All, I'm extremely new to MPI so forgive me if my question comes off as silly. I've only been dabbling around with parallel computing for a few weeks now but I'm wondering about the possibilities. So far with each example that I've been through, I create an MPI application and then run this application using the mpiexec command. What I'm wondering about is if it would be possible to say have a C function that executes some algorithm in a parallel manner that could be called by another C function. For example suppose i had two C functions, the first called function A and the second called function B. Function A is just a normal function that runs serially, function B executes its algorithm parallelly using MPI constucts. Is it possible to have a set up like this? > > >From the examples I've seen it appears that the MPI code runs as standalone units and couldn't be integrated with serially executing code. Is this true or is there someway to make this set up work? I may not have given enough information to answer the question, if there's any confusion please ask and i'll clarify. > > Thanks for your time, > > Mike_______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum _______________________________________________ mpi-forum mailing list mpi-forum(a)lists.mpi-forum.org http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum

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MPI load data to multiple nodes
by Jack Bryan 12 Jul '10

12 Jul '10

Dear All, I am working on a multi-computer Open MPI cluster system. If I put some data files in /home/mypath/folder, is it possible that all non-head nodes can access the files in the folder ? I need to load some data to some nodes, if all nodes can access the data, I do not need to load them to each node one by one. If multiple nodes access the same file to get data, is there conflict ? For example, fopen(myFile) by node 1, at the same time fopen(myFile) by node 2. Is it allowed to do that on MPI cluster without conflict ? Any help is appreciated. Jinxu Ding July 12 2010 _________________________________________________________________ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:…

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Re: [Mpi-forum] Integrating parallel and serial code
by Michael Morrison 12 Jul '10

12 Jul '10

Sorry, my mistake. Is there a user question list that you could direct me to, where i'd be able to ask questions like this? I've already begun with a few tutorials. I've been working with "Parallel Programming with MPI" by Peter Pacheco and also have begun browsing official MPI-2.2 Standard which I order from HLRS. None of the material I've seen covers the scenario I described though. Apologies again, I won't post further questions here. Mike On Mon, Jul 12, 2010 at 2:21 PM, Richard Treumann <treumann(a)us.ibm.com>wrote: > > This reflector is for discussion of the MPI Standard. The Forum is working > on extending the standard and this is part of how we communicate. It is not > a user question list. > > The simple answer is that MPI execute several distinct copies of a program > and provides the tools to let the program author break up the work over > these several copies. The program author breaks up the work into many pieces > and uses MPI to move data among the several pieces. > > There are many MPI Tutorial on the Web and you should probably begin there. > > > Dick Treumann - MPI Team > IBM Systems & Technology Group > Dept X2ZA / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 > Tele (845) 433-7846 Fax (845) 433-8363 > > > > From: Michael Morrison <mwmorrison93(a)gmail.com> To: > mpi-forum(a)lists.mpi-forum.org Date: 07/12/2010 05:06 PM Subject: [Mpi-forum] > Integrating parallel and serial code Sent by: > mpi-forum-bounces(a)lists.mpi-forum.org > ------------------------------ > > > > Hi All, I'm extremely new to MPI so forgive me if my question comes off as > silly. I've only been dabbling around with parallel computing for a few > weeks now but I'm wondering about the possibilities. So far with each > example that I've been through, I create an MPI application and then run > this application using the mpiexec command. What I'm wondering about is if > it would be possible to say have a C function that executes some algorithm > in a parallel manner that could be called by another C function. For example > suppose i had two C functions, the first called function A and the second > called function B. Function A is just a normal function that runs serially, > function B executes its algorithm parallelly using MPI constucts. Is it > possible to have a set up like this? > > >From the examples I've seen it appears that the MPI code runs as > standalone units and couldn't be integrated with serially executing code. > Is this true or is there someway to make this set up work? I may not have > given enough information to answer the question, if there's any confusion > please ask and i'll clarify. > > Thanks for your time, > > Mike_______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > > > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > >

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Re: [Mpi-forum] Integrating parallel and serial code
by Dave Goodell 12 Jul '10

12 Jul '10

I'm not sure who controls it (Rich/Jeff?), but it might help to put some text in the "About mpi-forum" field on the list subscription page to keep these sorts of questions from happening as frequently. It's currently blank. http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum -Dave On Jul 12, 2010, at 4:21 PM CDT, Richard Treumann wrote: > > This reflector is for discussion of the MPI Standard. The Forum is working on extending the standard and this is part of how we communicate. It is not a user question list. > > The simple answer is that MPI execute several distinct copies of a program and provides the tools to let the program author break up the work over these several copies. The program author breaks up the work into many pieces and uses MPI to move data among the several pieces. > > There are many MPI Tutorial on the Web and you should probably begin there. > > > Dick Treumann - MPI Team > IBM Systems & Technology Group > Dept X2ZA / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 > Tele (845) 433-7846 Fax (845) 433-8363 > > > > From: Michael Morrison <mwmorrison93(a)gmail.com> > To: mpi-forum(a)lists.mpi-forum.org > Date: 07/12/2010 05:06 PM > Subject: [Mpi-forum] Integrating parallel and serial code > Sent by: mpi-forum-bounces(a)lists.mpi-forum.org > > > > > Hi All, I'm extremely new to MPI so forgive me if my question comes off as silly. I've only been dabbling around with parallel computing for a few weeks now but I'm wondering about the possibilities. So far with each example that I've been through, I create an MPI application and then run this application using the mpiexec command. What I'm wondering about is if it would be possible to say have a C function that executes some algorithm in a parallel manner that could be called by another C function. For example suppose i had two C functions, the first called function A and the second called function B. Function A is just a normal function that runs serially, function B executes its algorithm parallelly using MPI constucts. Is it possible to have a set up like this? > > >From the examples I've seen it appears that the MPI code runs as standalone units and couldn't be integrated with serially executing code. Is this true or is there someway to make this set up work? I may not have given enough information to answer the question, if there's any confusion please ask and i'll clarify. > > Thanks for your time, > > Mike_______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum

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Re: [Mpi-forum] Integrating parallel and serial code
by Richard Treumann 12 Jul '10

12 Jul '10

This reflector is for discussion of the MPI Standard. The Forum is working on extending the standard and this is part of how we communicate. It is not a user question list. The simple answer is that MPI execute several distinct copies of a program and provides the tools to let the program author break up the work over these several copies. The program author breaks up the work into many pieces and uses MPI to move data among the several pieces. There are many MPI Tutorial on the Web and you should probably begin there. Dick Treumann - MPI Team IBM Systems & Technology Group Dept X2ZA / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 Tele (845) 433-7846 Fax (845) 433-8363 From: Michael Morrison <mwmorrison93(a)gmail.com> To: mpi-forum(a)lists.mpi-forum.org Date: 07/12/2010 05:06 PM Subject: [Mpi-forum] Integrating parallel and serial code Sent by: mpi-forum-bounces(a)lists.mpi-forum.org Hi All, I'm extremely new to MPI so forgive me if my question comes off as silly. I've only been dabbling around with parallel computing for a few weeks now but I'm wondering about the possibilities. So far with each example that I've been through, I create an MPI application and then run this application using the mpiexec command. What I'm wondering about is if it would be possible to say have a C function that executes some algorithm in a parallel manner that could be called by another C function. For example suppose i had two C functions, the first called function A and the second called function B. Function A is just a normal function that runs serially, function B executes its algorithm parallelly using MPI constucts. Is it possible to have a set up like this? >From the examples I've seen it appears that the MPI code runs as standalone units and couldn't be integrated with serially executing code. Is this true or is there someway to make this set up work? I may not have given enough information to answer the question, if there's any confusion please ask and i'll clarify. Thanks for your time, Mike_______________________________________________ mpi-forum mailing list mpi-forum(a)lists.mpi-forum.org http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum

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Integrating parallel and serial code
by Michael Morrison 12 Jul '10

12 Jul '10

Hi All, I'm extremely new to MPI so forgive me if my question comes off as silly. I've only been dabbling around with parallel computing for a few weeks now but I'm wondering about the possibilities. So far with each example that I've been through, I create an MPI application and then run this application using the mpiexec command. What I'm wondering about is if it would be possible to say have a C function that executes some algorithm in a parallel manner that could be called by another C function. For example suppose i had two C functions, the first called function A and the second called function B. Function A is just a normal function that runs serially, function B executes its algorithm parallelly using MPI constucts. Is it possible to have a set up like this? >From the examples I've seen it appears that the MPI code runs as standalone units and couldn't be integrated with serially executing code. Is this true or is there someway to make this set up work? I may not have given enough information to answer the question, if there's any confusion please ask and i'll clarify. Thanks for your time, Mike

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Re: [Mpi-forum] 2011 meeting schedule - proposed
by Bronis R. de Supinski 12 Jul '10

12 Jul '10

I think this is a good compromise. On Mon, 12 Jul 2010, Rolf Rabenseifner wrote: > After several members stated that we should not do too much > meetings in California compared to Chicago, > I propose to do the October 24-26 meeting also in Chicago, > i.e., each second meeting is in Chicago and in between, > we are in California or Europe. > > Best regards > Rolf > > ----- Original Message ----- >> From: "Richard L. Graham" <rlgraham(a)ornl.gov> >> To: "Main MPI Forum mailing list" <mpi-forum(a)lists.mpi-forum.org> >> Sent: Monday, July 12, 2010 10:20:08 AM >> Subject: [Mpi-forum] 2011 meeting schedule - proposed >> Thanks for all the feedback on the proposed meeting schedule for 2011. >> Based on all the input, I put up a firmer schedule for 2011 at the >> meetings web site. I am trying to get more details on the Sept Euro >> MPI meeting, so we can schedule the Forum meeting and will get these >> up ASAP. Feedback is welcome. >> >> Thanks, >> Rich >> >> _______________________________________________ >> mpi-forum mailing list >> mpi-forum(a)lists.mpi-forum.org >> http://*lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > > -- > Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)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) > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://*lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum > >

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Re: [Mpi-forum] 2011 meeting schedule - proposed
by Rolf Rabenseifner 12 Jul '10

12 Jul '10

After several members stated that we should not do too much meetings in California compared to Chicago, I propose to do the October 24-26 meeting also in Chicago, i.e., each second meeting is in Chicago and in between, we are in California or Europe. Best regards Rolf ----- Original Message ----- > From: "Richard L. Graham" <rlgraham(a)ornl.gov> > To: "Main MPI Forum mailing list" <mpi-forum(a)lists.mpi-forum.org> > Sent: Monday, July 12, 2010 10:20:08 AM > Subject: [Mpi-forum] 2011 meeting schedule - proposed > Thanks for all the feedback on the proposed meeting schedule for 2011. > Based on all the input, I put up a firmer schedule for 2011 at the > meetings web site. I am trying to get more details on the Sept Euro > MPI meeting, so we can schedule the Forum meeting and will get these > up ASAP. Feedback is welcome. > > Thanks, > Rich > > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum -- Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)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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