Re: [OMPI users] How to run different versions of application in the same run?

See here: http://www.open-mpi.org/faq/?category=running#mpmd-run On Tue, 2010-10-12 at 22:21 -0400, Bowen Zhou wrote: > Greetings, > > I'm doing software fault injection in a parallel application to evaluate > the effect of hardware failures to the execution. My question is how to > execute

Re: [OMPI users] a question about [MPI]IO on systems without network filesystem

Hi Paul I think you should clarify whether you mean you want you application to send all it's data back to a particular rank, which then does all IO (in which case the answer is any MPI implementation can do this... it's a matter of how you code the app), or if you want the application to know

Re: [OMPI users] MPI_Reduce performance

t; > Total execution time with Barrier+Reduce is 9453, with 128 procs. > > > > 2010/9/9 Terry Frankcombe <te...@chem.gu.se> > > Gabriele, > > > > Can you clarify... those timings are what is reported for > > the reductio

Re: [OMPI users] MPI_Reduce performance

. Terry Frankcombe Research School of Chemistry, Australian National University Ph: (+61) 0417 163 509Skype: terry.frankcombe

Re: [OMPI users] OpenMPI Run-Time "Freedom" Question

On Thu, 2010-08-12 at 20:04 -0500, Michael E. Thomadakis wrote: > The basic motive in this hypothetical situation is to build the MPI > application ONCE and then swap run-time libs as newer compilers come out Not building your application with the compiler you want to use sounds like a very

Re: [OMPI users] MPI_Bcast issue

On Tue, 2010-08-10 at 19:09 -0700, Randolph Pullen wrote: > Jeff thanks for the clarification, > What I am trying to do is run N concurrent copies of a 1 to N data > movement program to affect an N to N solution. I'm no MPI guru, nor do I completely understand what you are doing, but isn't this

Re: [OMPI users] Memory allocation error when linking with MPI libraries

You're trying to do a 6GB allocate. Can your underlying system handle that? IF you compile without the wrapper, does it work? I see your executable is using the OMPI memory stuff. IIRC there are switches to turn that off. On Fri, 2010-08-06 at 15:05 +0200, Nicolas Deladerriere wrote: >

Re: [OMPI users] Accessing to the send buffer

On Mon, 2010-08-02 at 11:36 -0400, Alberto Canestrelli wrote: > Thanks, > ok that is not my problem I never read a data from the posted receive > before the correspondent WAIT. Now the last question is: what could > happen if I am reading the data from the posted send? I do it plenty of >

Re: [OMPI users] MPI_Allreduce on local machine

On Tue, 2010-07-27 at 16:19 -0400, Gus Correa wrote: > Hi Hugo, David, Jeff, Terry, Anton, list > > I suppose maybe we're guessing that somehow on Hugo's iMac > MPI_DOUBLE_PRECISION may not have as many bytes as dp = kind(1.d0), > hence the segmentation fault on MPI_Allreduce. > > Question: >

Re: [OMPI users] MPI_Allreduce on local machine

On Tue, 2010-07-27 at 08:11 -0400, Jeff Squyres wrote: > On Jul 26, 2010, at 11:06 PM, Hugo Gagnon wrote: > > > 8 integer, parameter :: dp = kind(1.d0) > > 9 real(kind=dp) :: inside(5), outside(5) > > I'm not a fortran expert -- is kind(1.d0) really double precision?

Re: [OMPI users] A problem with 'mpiexec -launch-agent'

option to > `mpiexec`. Both ways lead obviously to the erroneous behavior you > encounter. Hi folks Speaking as no more than an uneducated user, having the behaviour change depending on invoking by an absolute path or invoking by some unspecified (potentially shell-dependent) path magic s

Re: [OMPI users] How do I run OpenMPI safely on a Nehalem standalone machine?

> I don't know what Jeff meant by that, but we haven't seen a feasible way > of disabling HT without rebooting and using the BIOS options. According to this page: http://dag.wieers.com/blog/is-hyper-threading-enabled-on-a-linux-system in RHEL5/CentOS-5 it's easy to switch it on and off on the

Re: [OMPI users] Fortran derived types

Hi Derek On Wed, 2010-05-05 at 13:05 -0400, Cole, Derek E wrote: > In general, even in your serial fortran code, you're already taking a > performance hit using a derived type. Do you have any numbers to back that up? Ciao Terry

Re: [OMPI users] Hide Abort output

> Jeff - > > I started a discussion of MPI_Quit on the MPI Forum reflector. I raised > the question because I do not think using MPI_Abort is appropriate. > > The situation is when a single task decides the parallel program has > arrived at the desired answer and therefore whatever the other

Re: [OMPI users] Help om Openmpi

>1. Run the following command on the client > * -> ssh-keygen -t dsa >2. File id_dsa and id_dsa.pub will be created inside $HOME/.ssh >3. Copy id_dsa.pub to the server's .ssh directory > * -> scp $HOME/.ssh/id_dsa.pub user@server:/home/user/.ssh >4. Change to

Re: [OMPI users] Help om Openmpi

On Tue, 2010-04-06 at 02:33 -0500, Trent Creekmore wrote: > SSH means SECURE Shell. That being said, it would not be very secure > without a password, now would it? I think you need to read about public key authentication. It is secure.

Re: [OMPI users] Problem with private variables in modules

Hi Justin I think you are confusing OpenMP and OpenMPI. You sound like you're using OpenMP. This mailing list is for OpenMPI, a specific implementation of MPI. OpenMP and MPI, while having some overlapping aims, are completely separate. I suggest you post your query to an OpenMP mailing list.

Re: [OMPI users] newbe question

It sounds like, with the fault tolerance features specifically mentioned by Vasiliy, MPI in its current form may not be the simplest choice. On Tue, 2010-03-09 at 18:55 -0700, Ralph Castain wrote: > Running an orted directly won't work - it is intended solely to be launched > when running a job

Re: [OMPI users] running external program on same processor (Fortran)

g/wiki/Scheduling_(computing) vs. http://en.wikipedia.org/wiki/Job_scheduler > > Am 03.03.2010 um 17:32 schrieb Prentice Bisbal: > > > >> Terry Frankcombe wrote: > >>> Surely this is the problem of the scheduler that your system uses, > > > > This I would

Re: [OMPI users] MPI_Init() and MPI_Init_thread()

I can't speak for the developers. However, I think it's to do with the library internals. >From here: http://www.mpi-forum.org/docs/mpi-20-html/node165.htm "Advice to implementors. "If provided is not MPI_THREAD_SINGLE then the MPI library should not invoke C/ C++/Fortran library calls that

Re: [OMPI users] running external program on same processor (Fortran)

Surely this is the problem of the scheduler that your system uses, rather than MPI? On Wed, 2010-03-03 at 00:48 +, abc def wrote: > Hello, > > I wonder if someone can help. > > The situation is that I have an MPI-parallel fortran program. I run it > and it's distributed on N cores, and

Re: [OMPI users] problems on parallel writing

On Wed, 2010-02-24 at 13:40 -0500, w k wrote: > Hi Jordy, > > I don't think this part caused the problem. For fortran, it doesn't > matter if the pointer is NULL as long as the count requested from the > processor is 0. Actually I tested the code and it passed this part > without problem. I

Re: [OMPI users] [btl_tcp_frag.c:216:mca_btl_tcp_frag_recv] mca_btl_tcp_frag_recv: readv failed: Connection reset by peer (104)

Vasp can be temperamental. For example, I have a largish system (384 atoms) for which Vasp hangs if I request more than 120 MD steps at a time. I am not convinced that this is OPMI's problem. However, your case looks much more diagnosable than my silent spinning hang. On Tue, 2010-02-23 at

Re: [OMPI users] Bad Infiniband latency with subounce

On Mon, 2010-02-15 at 20:18 -0700, Ralph Castain wrote: > Did you run it with -mca mpi_paffinity_alone 1? Given this is 1.4.1, you can > set the bindings to -bind-to-socket or -bind-to-core. Either will give you > improved performance. > > IIRC, MVAPICH defaults to -bind-to-socket. OMPI

Re: [OMPI users] Test OpenMPI on a cluster

It seems your OpenMPI installation is not PBS-aware. Either reinstall OpenMPI configured for PBS (and then you don't even need -np 10), or, as Constantinos says, find the PBS nodefile and pass that to mpirun. On Sat, 2010-01-30 at 18:45 -0800, Tim wrote: > Hi, > > I am learning MPI on

Re: [OMPI users] speed up this problem by MPI

In rank 0 main broadcast feature to all processes. In f calculate a slice of array based on rank, then either send/recv back to rank 0 or maybe gather. Only rank 0 does everything else. (Other ranks must call f after recv'ing feature.) On Thu, 2010-01-28 at 21:23 -0800, Tim wrote: > Sorry,

Re: [OMPI users] speed up this problem by MPI

On Thu, 2010-01-28 at 17:05 -0800, Tim wrote: > Also I only need the loop that computes every element of the array to > be parallelized. Someone said that the parallel part begins with > MPI_Init and ends with MPI_Finilize, and one can do any serial > computations before and/or after these calls.

Re: [OMPI users] How to start MPI_Spawn child processes early?

My question is why? If you are willing to reserve a chunk of your machine for yet-to-exist tasks, why not just create them all at mpirun time and slice and dice your communicators as appropriate? On Thu, 2010-01-28 at 09:24 +1100, Jaison Paul wrote: > Hi, I am just reposting my early query once

Re: [OMPI users] MPI Processes and Auto Vectorization

On Tue, 2009-12-01 at 05:47 -0800, Tim Prince wrote: > amjad ali wrote: > > Hi, > > thanks T.Prince, > > > > Your saying: > > "I'll just mention that we are well into the era of 3 levels of > > programming parallelization: vectorization, threaded parallel (e.g. > > OpenMP), and process

Re: [OMPI users] Open MPI Query

On Tue, 2009-11-24 at 15:55 +0530, Vivek Satpute wrote: > Hi, > > I am new to Open MPI ( which is part of OFED-1.4 packege ). I have few > basic queries about > Open MPI : > > 1) I am using openmpi-1.2.8 ( it is part of OFED-1.4 ). Is has two > examples i) hello_c ii) ring_c > Does those

Re: [OMPI users] Distribute app over open mpi

On Fri, 2009-11-06 at 08:10 -0800, Arnaud Westenberg wrote: > Hi all, > > Sorry for the newbie question, but I'm having a hard time finding the answer, > as I'm not even familiar with the terminology... > > I've setup a small cluster on Ubuntu (hardy) and everything is working great, >

Re: [OMPI users] mpirun example program fail on multiple nodes- unable to launch specified application on client node

For small ad hoc COWs I'd vote for sshfs too. It may well be as slow as a dog, but it actually has some security, unlike NFS, and is a doddle to make work with no superuser access on the server, unlike NFS. On Thu, 2009-11-05 at 17:53 -0500, Jeff Squyres wrote: > On Nov 5, 2009, at 5:34 PM,

Re: [OMPI users] How to create multi-thread parallel program using thread-safe send and recv?

If you want all threads to communicate via MPI, and your initially launching multiple parents, I don't really see the advantage of using threads at all. Why not launch 12 MPI processes? On Tue, 2009-09-22 at 10:32 -0700, Eugene Loh wrote: > guosong wrote: > > Thanks for responding. I used a

Re: [OMPI users] SVD with mpi

Take a look at http://www.netlib.org/scalapack/ Ciao Terry On Tue, 2009-09-08 at 13:55 +0200, Attila Börcs wrote: > Hi Everyone, > > I'd like to achieve singular value decomposition with mpi. I heard > about Lanczos algorith and some different kind of algorith for svd, > but I need some help

Re: [OMPI users] Installation problems

> I suspect that my not changing my .bash_profile is indeed the > problem unfortunately I do not know were yum placed open's lib and bin > directories. I tried looking in /usr/local/ but did not find and > openmpi directory, I suspect this has something to my Fedora > distribution as

Re: [OMPI users] Send variable size of matrices

Which language bindings? For Fortran, consider pack or reshape. (I *think* whether array sections are bundled off into temporary, contiguous storage is implementation-dependent.) Isn't it easier to broadcast the size first? On Tue, 2009-07-21 at 11:53 +0530, Prasadcse Perera wrote: > Hi all,

Re: [OMPI users] MPI and C++ (Boost)

ctive that may be. It's like the difference between writing a numerical program in standard-conforming Fortran and writing it in the latest flavour of the month interpreted language calling highly optimised libraries behind the scenes. IF boost is attached to MPI 3 (or whatever), AND it becomes part of

Re: [OMPI users] What flags for configure for a single machine installation ?

On Fri, 2009-06-05 at 14:36 +0200, DEVEL Michel wrote: > Terry Frankcombe a écrit : > > Is there any compelling reason you're not using the wrappers > > mpif77/mpif90? > > > > > In fact, this is for the same reason that I also try to use static linking: >

Re: [OMPI users] What flags for configure for a single machine installation ?

Is there any compelling reason you're not using the wrappers mpif77/mpif90? On Thu, 2009-06-04 at 18:01 +0200, DEVEL Michel wrote: > Dear all, > > I still have problems with installing and using openmpi: > > 1°) In fact I just want to install openmpi on my machine (single i7 920) > to be able

Re: [OMPI users] LSF launch with OpenMPI

On Tue, 2009-05-05 at 12:10 +0200, Matthieu Brucher wrote: > Hello, > > I have two questions, in fact. > > The first is what the support of LSF by OpenMPI means. When mpirun is > executed, it is an LSF job that is actually ran? Or what does it > imply? I've tried to search on the openmpi website

Re: [OMPI users] 100% CPU doing nothing!?

ng? There's some discussion starting here: <http://www.open-mpi.org/community/lists/users/2008/04/5457.php> If you really want to make your application run slower, you can yield the CPU when not doing much: <http://www.open-mpi.org/faq/?category=running#force-aggressive-degraded> Ciao

Re: [OMPI users] An mpirun question

Hi Min Zhu You need to read about hostfiles and bynode/byslot scheduling. See here: Ciao On Thu, 2009-04-16 at 10:43 +0100, Min Zhu wrote: > Dear all, > > > > I wonder if you could help me with this question. > > I have

Re: [OMPI users] ssh MPi and program tests

On Tue, 2009-04-07 at 11:39 +0200, Francesco Pietra wrote: > Hi Gus: > I should have set clear at the beginning that on the Zyxel router > (connected to Internet by dynamic IP afforded by the provider) there > are three computers. Their host names: > > deb32 (desktop debian i386) > > deb64

Re: [OMPI users] libnuma under ompi 1.3

Thanks to everyone who contributed. I no longer think this is Open MPI's problem. This system is just stupid. Everything's 64 bit (which various probes with file confirm). There's no icc, so I can't test with that. gcc finds libnuma without -L. (Though a simple gcc -lnuma -Wl,-t reports

Re: [OMPI users] Is this an OpenMPI bug?

When you say "a real variable", you mean default real, no crazy implicit typing or anything? I think if x is real(8) you'd see what you say you see. On Fri, 2009-02-20 at 18:54 -0500, -Gim wrote: > I am trying to use the mpi_bcast function in fortran. I am using > open-mpi-v-1.2.7 > > Say x

Re: [OMPI users] using ompi-server on a single node

But why doesn't tcp work on loopback? On Mon, 2009-01-05 at 07:25 -0700, Ralph Castain wrote: > It is currently a known limitation - shared memory currently only > works between procs from the same job. There is an enhancement coming > that will remove this restriction, but it won't be out

Re: [OMPI users] openMPI, transfer data from multiple sources to one destination

It sounds like you may like to read about MPI_ANY_SOURCE as the source for MPI_Recv. Using MPI_Probe, with MPI_ANY_SOURCE, may also be a solution. > HI, > > I need to transfer data from multiple sources to one destination. > The requirement is: > > (1) The sources and destination nodes may work

Re: [OMPI users] pgi and gcc runtime compatability

Many of today's compilers for Linux (pgi, intel, etc.) are designed to be link-compatible with gcc. That must extend to calling conventions (mangling schemes and argument passing, etc.) If it's static link-compatible, surely this applies to dynamic (runtime) linking (right?) Is there stuff

Re: [OMPI users] Processor/core selection/affinity for large shared memory systems

Isn't it up to the OS scheduler what gets run where? > We have an 8-way, 32-core AMD processor machine (single system image) > and are at present running OpenMPI 1.2.8 . Jobs are launched locally on > the machine itself. As far as I can see, there doesn't seem to be any > way to tell OpenMPI

Re: [OMPI users] Problems installing in Cygwin - Problem with GCC 3.4.4

> *** Fortran 90/95 compiler > checking whether we are using the GNU Fortran compiler... yes > checking whether g95 accepts -g... yes > checking if Fortran compiler works... yes > checking whether g95 and g95 compilers are compatible... no > configure: WARNING: *** Fortran 77 and Fortran 90

Re: [OMPI users] Problems installing in Cygwin - Problem with GCC 3.4.4

> On Nov 3, 2008, at 3:36 PM, Gustavo Seabra wrote: > >>> For your fortran issue, the Fortran 90 interface needs the Fortran 77 >>> interface. So you need to supply an F77 as well (the output from >>> configure >>> should indicate that the F90 interface was disabled because the F77 >>> interface

Re: [OMPI users] MPI + Mixed language coding(Fortran90 + C++)

On Sat, 2008-11-01 at 07:52 -0400, Jeff Squyres wrote: > On Oct 31, 2008, at 3:07 PM, Rajesh Ramaya wrote: > > > Thank you very much for the immediate reply. I am able to > > successfully > > access the data from the common block but the values are zero. In my > > algorithm I even update a

Re: [OMPI users] MPI_SUM and MPI_REAL16 with MPI_ALLREDUCE in fortran90

I assume you've confirmed that point to point communication works happily with quad prec on your machine? How about one-way reductions? On Tue, 2008-10-28 at 08:47 +, Julien Devriendt wrote: > Thanks for your suggestions. > I tried them all (declaring my variables as REAL*16 or REAL(16)) to

Re: [OMPI users] Can OpenMPI support multiple compilers?

It happily supports multiple compilers on the same system, but not in the way you mean. You need another installation of OMPI (in, say, /usr/lib64/mpi/intel) for icc/ifort. Select by path manipulation. On Mon, 2008-10-20 at 08:19 +0800, Wen Hao Wang wrote: > Hi all: > > I have openmpi 1.2.5

Re: [OMPI users] Debian MPI -- mpirun missing

Er, shouldn't this be in the Debian support list? A correctly installed OpenMPI will give you mpirun. If their openmpi-bin package doesn't, then surely it's broken? (Or is there a straight openmpi package?) On Sat, 2008-10-18 at 00:16 +0900, Raymond Wan wrote: > Hi all, > > I'm very new to

Re: [OMPI users] Performance: MPICH2 vs OpenMPI

>I'm rusty on my GCC, too, though - does it default to an O2 > level, or does it default to no optimizations? Default gcc is indeed no optimisation. gcc seems to like making users type really long complicated command lines even more than OpenMPI does. (Yes yes, I know! Don't tell me!)

Re: [OMPI users] qsub - mpirun problem

On Mon, 2008-09-29 at 17:30 -0500, Zhiliang Hu wrote: > >As you blank out some addresses: have the nodes and the headnode one > >or two network cards installed? All the names like node001 et al. are > >known on neach node by the correct address? I.e. 172.16.100.1 = node001? > > > >-- Reuti >

Re: [OMPI users] how to install openmpi with a specific gcc

http://www.open-mpi.org/faq/?category=building#build-compilers But this won't help build your app with the dusty, crumbling 2.95. You're telling OpenMPI (and all of OpenMPI, including mpicc) to use a specific compiler. You need to fix your code so it's portable. On Thu, 2008-09-25 at 20:56

Re: [OMPI users] which gcc to compile openmpi with?

Both of those are really ancient. Fortran in particular will not work happily with those. Why don't you install something from the current epoch? I run happily with gcc 4.3.2. On Wed, 2008-09-24 at 08:36 -0700, Shafagh Jafer wrote: > which gcc is prefered to compile openmpi with?? gcc-2.95.3

Re: [OMPI users] Configure and Build ok, but mpi module not recognized?

often define new types, which must be known before you start declaring implicit rules). On Tue, 2008-09-23 at 13:34 -0400, Gus Correa wrote: > Hi Brian and list > > Terry Frankcombe is right on the spot on that recommendation to you. > > Just to support Terry's suggestion, here is

Re: [OMPI users] Configure and Build ok, but mpi module not recognized?

Remember what include does: it essentially dumps mpif.h into the source. So to be proper F90 you need: PROGRAM main USE local_module IMPLICT NONE INCLUDE 'mpif.h' ... On Mon, 2008-09-22 at 20:17 -0600, Brian Harker wrote: > Well, I'm stumped then...my top-level program is the only one that >

Re: [OMPI users] what is inside mpicc/mpic++

In OMPI these are binaries, not scripts. Not human readable. [tjf@rscpc28 NH2+]$ ll /usr/local/bin/mpif90 lrwxrwxrwx 1 root root 12 2008-03-05 14:39 /usr/local/bin/mpif90 -> opal_wrapper* [tjf@rscpc28 NH2+]$ file /usr/local/bin/opal_wrapper /usr/local/bin/opal_wrapper: ELF 32-bit LSB

Re: [OMPI users] Heap profiling with OpenMPI

I can't speak for Jeff, but my understanding of the changes for 1.3 should allow you to switch off the memory manager when running your checks. It seems to me an obvious interim solution would be to have two versions of OpenMPI installed, one with and one without the memory manager. Use one for

Re: [OMPI users] getting fortran90 to compile

On Sun, 2008-07-13 at 10:58 -0500, zach wrote: > I installed openmpi like > ./configure --prefix= FC=/usr/bin/gfortran-4.2 > make all install If gfortran is in your path (which is usually the best way to have it set up) then ./configure --prefix= should work. (It does for me.) Is there a

Re: [OMPI users] Proper way to throw an error to all nodes?

have the node that spotted the error die > quietly and wait for the others to notice? > > Thanks for any suggestions! -- Dr. Terry Frankcombe Research School of Chemistry, Australian National University Ph: (+61) 0417 163 509Skype: terry.frankcombe

Re: [OMPI users] Memory manager

with the memory manager, obviously. That will make > the mmap / sbrk cross-over point the same as the default allocator in > Linux. There's still one other tweak we do, but I'm almost 100% > positive it's the threshold causing problems. > > > Brian > > > On May 19, 2008

Re: [OMPI users] Memory manager

t's the general feeling about how bad this is? On Tue, 2008-05-13 at 13:12 +1000, Terry Frankcombe wrote: > Hi folks > > I'm trying to run an MPI app on an infiniband cluster with OpenMPI > 1.2.6. > > When run on a single node, this app is grabbing large chunks of memory > (

[OMPI users] Memory manager

it be that this vmem is being grabbed by the OpenMPI memory manager rather than directly by the app? Ciao Terry -- Dr. Terry Frankcombe Research School of Chemistry, Australian National University Ph: (+61) 0417 163 509Skype: terry.frankcombe

Re: [OMPI users] mpif77 report Old-style type declaration

It's a function of your underlying compiler. Try: mpif77 --showme to see how it's being invoked. On Thu, 2008-05-08 at 16:55 +0800, Wen Hao Wang wrote: > Hi all: > > I am using openmpi to compile Fortran program on RHEL5.2 x86 machine. > Open MPI 1.2.5-2 is installed. mpif77 gave following

Re: [OMPI users] openMPI + Ubuntu 7.10 puzzling

>> vrotival@vrotival-laptop:~/Work/workbench$ ompi_info --all >> ompi_info: Symbol `mca_allocator_base_components' has different size in >> shared object, consider re-linking > > Usually, this "has different size" means that libraries have changed > since you've compiled your program. > >>

Re: [OMPI users] mpicc -showme:compile output (possible bug report)

Given that discussion, might I suggest an (untested) workaround would be to --prefix OpenMPI into a non-standard location? On Wed, 2008-04-16 at 13:03 -0400, Jeff Squyres wrote: > On Apr 16, 2008, at 9:38 AM, Crni Gorac wrote: > >> mpicc (and friends) typically do not output -I only for

Re: [OMPI users] An error occurred in MPI_comm_size

On Mon, 2008-04-07 at 09:08 -0700, yacob sen wrote: > > > Dear All, > > I have just installed openmpi/mpich in ubuntu 7.10 in my linux machine > which has a dual processor. That's a little bit like saying you've installed Ubuntu/Red Hat on your machine. OpenMPI and MPICH are different

Re: [OMPI users] setup of a basic system on RHEL or Fedora

> One thing about running programs is that the binaries need to be in the > same absolute path on all systems. This means if you're running the > program from /home/me on system1, the program you're running must also > be in /home/me on all the other systems. OpenMPI will not transfer those

Re: [OMPI users] Spawn problem

My C++ is a little rusty. Is that returned intercommunicator going where you think it is? If you unroll the loop does the same badness happen? On Mon, 2008-03-31 at 02:41 -0300, Joao Vicente Lima wrote: > Hi, > sorry bring this again ... but i hope use spawn in ompi someday :-D > > The

Re: [OMPI users] More on AlltoAll

If the data distribution was sufficiently predictable and long-lived through the life of the application, could one not define new communicators to clean up the calls? > After reading the previous discussion on AllReduce and AlltoAll, I > thought I would ask my question. I have a case where I

Re: [OMPI users] ScaLapack and BLACS on Leopard

> Intel ifort is 7.7x faster then Linux g95 on MacPro 3.0 GHz > Intel ifort is 2.9x faster then Linux g95 on Dual Opteron 1.4 GHz > Intel ifort is 1.8x faster then Linux g95 on SGI Altix 350 dual > Itanium2 1.4 GHz > OS X g95 is 2.7x faster then Linux g95 on a MacPro 2.66 GHz (same >

Re: [OMPI users] OpenMPI on intel core 2 duo machine for parallel computation.

On Thu, 2008-02-28 at 16:32 -0600, Chembeti, Ramesh (S) wrote: > Dear All, > > I am a graduate student working on molecular dynamic simulation. My > professor/adviser is planning to buy Linux based clusters. But before that he > wanted me to parallelize a serial code on molecular dynamic

Re: [OMPI users] process placement with toruqe and OpenMP

> Ok so I ask the mpirun masters how would you do the following: > > I submit a job with torque (we use --with-tm) like the following: > > nodes=4:ppn=2 > > My desired outcome is to have 1 mpi process per 2 cpus and use > threaded blas (or my own OpenMP take your pick) For the above, -np 4

Re: [OMPI users] Excessive Use of CPU System Resources with OpenMPI 1.2.4 using TCP only ..

On Tue, 2008-01-22 at 20:19 +0100, Pignot Geoffroy wrote: > You could try the following MCA setting in your mpirun command > --mca mpi_yield_when_idle 1 Yes, but to repeat what was said above, it is first essential that you read:

Re: [OMPI users] Excessive Use of CPU System Resources with OpenMPI 1.2.4 using TCP only ..

Well, I have noticed that when a process is waiting for communication from another process the reported CPU usage remains around 100%. Is that what you mean? I haven't explored whether these processes give way to other active processes under the linux scheduler, nor whether I should expect

[OMPI users] Memory manager

3 and 1.2.4? Does anyone care to comment? Ciao Terry -- Dr Terry Frankcombe Physical Chemistry, Department of Chemistry Göteborgs Universitet SE-412 96 Göteborg Sweden Ph: +46 76 224 0887 Skype: terry.frankcombe <te...@chem.gu.se>

Re: [OMPI users] error -- libtool unsupported hardcode properties

Isn't this another case of trying to use two different Fortran compilers at the same time? On Tue, 2007-06-19 at 20:04 -0400, Jeff Squyres wrote: > I have not seen this before -- did you look in the libtool > documentation? ("See the libtool documentation for more information.") > > On Jun

Re: [OMPI users] f90 support not built with gfortran?

On Mon, 2007-06-11 at 12:10 -0500, Jeff Pummill wrote: > Greetings all, > > I downloaded and configured v1.2.2 this morning on an Opteron cluster > using the following configure directives... > > ./configure --prefix=/share/apps CC=gcc CXX=g++ F77=g77 FC=gfortran > CFLAGS=-m64 CXXFLAGS=-m64

Re: [OMPI users] Library Definitions

Hi Victor I'd suggest 3 seconds of CPU time is far, far to small a problem to do scaling tests with. Even with only 2 CPUs, I wouldn't go below 100 times that. On Mon, 2007-06-11 at 01:10 -0700, victor marian wrote: > Hi Jeff > > I ran the NAS Parallel Bechmark and it gives for me >

Re: [OMPI users] Newbie question. Please help.

cl As far as I can see (it was a long time ago!) I didn't use BLACS or SCALAPACK libraries. I used ATLAS. Maybe this will help. -- Dr Terry Frankcombe Physical Chemistry, Department of Chemistry Göteborgs Universitet SE-412 96 Göteborg Sweden Ph: +46 76 224 0887 Skype: terry.fran