Re: [OMPI users] PathScale problems persist

I am using GCC 4.x: $ pathCC -v PathScale(TM) Compiler Suite: Version 3.2 Built on: 2008-06-16 16:41:38 -0700 Thread model: posix GNU gcc version 4.2.0 (PathScale 3.2 driver) $ pathCC -show-defaults Optimization level and compilation target: -O2 -mcpu=opteron -m64 -msse -msse2 -mno-sse3

Re: [OMPI users] PathScale problems persist

You should probably take this up with Pathscale's support team. On Sep 23, 2010, at 3:56 AM, Rafael Arco Arredondo wrote: > I am using GCC 4.x: > > $ pathCC -v > PathScale(TM) Compiler Suite: Version 3.2 > Built on: 2008-06-16 16:41:38 -0700 > Thread model: posix > GNU gcc version 4.2.0

[OMPI users] Question about Asynchronous collectives

Dear all, i'm studing the interfaces of new collective routines in next MPI-3, and i've read that new collectives haven't any tag. So all collective operations must follow the ordering rules for collective calls. >From what i understand, this means that i can't use: MPI_IBcast(MPI_COMM_WORLD,

[OMPI users] Running on crashing nodes

Dear users, Our cluster has a number of nodes which have high probability to crash, so it happens quite often that calculations stop due to one node getting down. May be you know if it is possible to block the crashed nodes during run-time when running with OpenMPI? I am asking about principal

[OMPI users] "self scheduled" work & mpi receive???

Hi All: I've written an openmpi program that "self schedules" the work. The master task is in a loop chunking up an input stream and handing off jobs to worker tasks. At first the master gives the next job to the next highest rank. After all ranks have their first job, the master waits via

Re: [OMPI users] Question about Asynchronous collectives

On Sep 23, 2010, at 6:28 AM, Gabriele Fatigati wrote: > i'm studing the interfaces of new collective routines in next MPI-3, and i've > read that new collectives haven't any tag. Correct. > So all collective operations must follow the ordering rules for collective > calls. Also correct. >

Re: [OMPI users] Question about Asynchronous collectives

Mm, to be sure, if i have one processor who does: MPI_IBcast(MPI_COMM_WORLD, request_1) // first Bcast MPI_IBcast(MPI_COMM_WORLD, request_2) // second Bcast it means that i can't have another process who does the follow: MPI_IBcast(MPI_COMM_WORLD, request_2) // firt Bcast for another process

Re: [OMPI users] Question about Asynchronous collectives

On Sep 23, 2010, at 10:00 AM, Gabriele Fatigati wrote: > to be sure, if i have one processor who does: > > MPI_IBcast(MPI_COMM_WORLD, request_1) // first Bcast > MPI_IBcast(MPI_COMM_WORLD, request_2) // second Bcast > > it means that i can't have another process who does the follow: > >

Re: [OMPI users] Question about Asynchronous collectives

request_1 and request_2 are just local variable names. The only thing that determines matching order is CC issue order on the communicator. At each process, some CC is issued first and some CC is issued second. The first issued CC at each process will try to match the first issued CC at the

Re: [OMPI users] "self scheduled" work & mpi receive???

Hi Lewis, On Thu, Sep 23, 2010 at 9:38 AM, Lewis, Ambrose J. wrote: > Hi All: > > I’ve written an openmpi program that “self schedules” the work. > > The master task is in a loop chunking up an input stream and handing off > jobs to worker tasks.  At first the master

Re: [OMPI users] Question about Asynchronous collectives

Sorry Richard, what is CC issue order on the communicator?, in particular, "CC", what does it mean? 2010/9/23 Richard Treumann > > request_1 and request_2 are just local variable names. > > The only thing that determines matching order is CC issue order on the >

Re: [OMPI users] "self scheduled" work & mpi receive???

Hi All: I’ve written an openmpi program that “self schedules” the work. The master task is in a loop chunking up an input stream and handing off jobs to worker tasks. At first the master gives the next job to the next highest rank. After all ranks have their first job, the master

[OMPI users] Porting Open MPI to ARM: How essential is the opal_sys_timer_get_cycles() function?

Dear Open MPI, How essential is Open MPI's opal_sys_timer_get_cycles() function? It apparently needs to access a timestamp register directly. That is a trivial operation in PPC (mftb) or x86 (tsc), but the ARM processor apparently doesn't have a similar function in its instruction set. Is it

[OMPI users] How to know which process is running on which core?

Hi all, I'm new in the list. I don't know if this post has been treated before. My question is: Is there a way in the OMPI library to report which process is running on which core in a SMP system? I need to know processor affinity for optimizations issues. Regards Fernando Saez

Re: [OMPI users] Question about Asynchronous collectives

CC stands for any Collective Communication operation. Every CC occurs on some communicator. Every CC is issued (basically the thread the call is on enters the call) at some point in time. If two threads are issuing CC calls on the same communicator, the issue order can become ambiguous so

Re: [OMPI users] function fgets hangs a mpi program when it is used ompi-ps command

Jeff and Ralph, Thank you for your reply. 1) I'm not running on machines with OpenFabrics. 2) In my example, ompi-ps prints a maximum 82 bytes per line. Even so, I augment to 300 bytes per line to be sure that it is not the problem. char mystring [300]; ... fgets (mystring , 300 , pFile); 2)

Re: [OMPI users] "self scheduled" work & mpi receive???

That's a great suggestion...Thanks! amb -Original Message- From: users-boun...@open-mpi.org on behalf of Bowen Zhou Sent: Thu 9/23/2010 1:18 PM To: Open MPI Users Subject: Re: [OMPI users] "self scheduled" work & mpi receive??? > Hi All: > > I've written an openmpi program that

Re: [OMPI users] "self scheduled" work & mpi receive???

Hi Ambrose, I'm interested in you work, i have a app to convert for myself and i don't know enough the MPI structure and syntaxe to make it... So if you wanna share your app i'm interested in taking a look at it!! Thanks and have a nice day!! Mikael Lavoie 2010/9/23 Lewis, Ambrose J.

Re: [OMPI users] [openib] segfault when using openib btl

Eloi, I am curious about your problem. Can you tell me what size of job it is? Does it always fail on the same bcast, or same process? Eloi Gaudry wrote: Hi Nysal, Thanks for your suggestions. I'm now able to get the checksum computed and redirected to stdout, thanks (I forgot the "-mca

Re: [OMPI users] function fgets hangs a mpi program when it is used ompi-ps command

ompi-ps talks to mpirun to get the info, and then pretty-prints it to stderr. Best guess is that it is having problems contacting mpirun. Are you running it on the same node as mpirun (a requirement, unless you pass it the full contact info)? Check the ompi-ps man page and also "ompi-ps -h" to

Re: [OMPI users] Running on crashing nodes

In a word, no. If a node crashes, OMPI will abort the currently-running job if it had processes on that node. There is no current ability to "ride-thru" such an event. That said, there is work being done to support "ride-thru". Most of that is in the current developer's code trunk, and more is