Hi Jeff (and everyone),
Thanks! Now I have compiled the openmpi-1.2.2 successfully under i386-Linux
(Debian Sarge) with the following configurations:
./configure CFLAGS=-g -pg -O3 --enable-mpi-threads --enable-progress-threads
--enable-static --disable-shared
However when I compile my client p
Are you saying t(single-process execution) < t(4-process execution)
for identical problems on each (same total amount of data)?
There's rarely a speedup in such a case-- processing the same
amount of data while shipping some fraction of it over
a slow network between processing steps is almost cer
If your problem size is not large enough than any MPI program will
perform worse on a "large number" of nodes because of the overhead
involved in setting up the problem and network latency. Sometimes
that "large number" is as small as two :)
I am not at all familiar with DL POLY, but if you make
We have a few users using DLPOLY with OMPI. Running just fine.
Watch out what kind of simulation you are doing like all MD
software, not all simulations are better in parallel. In some the
comunication overhead is much worse than running on just one cpu. I
see this all the time. You co
Hello,
Does anyone have experience using DL POLY with OpenMPI? I've gotten
it to compile, but when I run a simulation using mpirun with two dual-
processor machines, it runs a little *slower* than on one CPU on one
machine! Yet the program is running two instances on each node. Any
idea
Hmmm...well, we certainly will ke a point to give you a better error
message! Probably won't get it into 1.2.3, but should make later releases.
Thanks for letting me know
Ralph
On 6/7/07 1:22 PM, "Guillaume THOMAS-COLLIGNON"
wrote:
> You're right, the --wdir option works fine !
> Thanks !
>
>
You're right, the --wdir option works fine !
Thanks !
I just tried an older version we had compiled (1.2b3), and the error
was more explicit than the seg fault we get with 1.2.2 :
Could not chdir to home directory /rdu/thomasco: No such file or
directory
Have you tried the --wdir option yet? It should let you set your working
directory to anywhere. I don't believe it will require you to have a home
directory on the backend nodes, though I can't sweathat ssh will be happy
if you don't.
Just do "mpirun -h" for a full list of options - it will descri
That is the default behavior because having common home areas is
fairly common, but with some work you can run your code from wherever
is convenient. Using the -wd flag you can have the code run from
wherever you want, but the code and data has to get there somehow.
If you are using a batch sche
I am trying to switch to OpenMPI, and I ran into a problem : my home
directory must exist on all the nodes, or orted will crash.
I have a "master" machine where I initiate the mpirun command.
Then I have a bunch of slave machines, which will also execute the
MPI job.
My user exists on all the
Yes, it is the correct approach. This code was just changed and then
fixed in the immediate past (yesterday? or perhaps the day before?),
and the fix was exactly as you described.
https://svn.open-mpi.org/trac/ompi/changeset/14939
On Jun 7, 2007, at 11:26 AM, Charles Williams wrote:
Hi,
I've been using openmpi-1.1.5 with no problems, but I decided to move
up to version 1.2 yesterday. I am working with the developers'
version of PETSc, so I attempted to configure it using the newly-
installed open-mpi. When I tried this, though, I ran into the
following problem (from
This issue was just recently discussed on this list -- check out the
thread here:
http://www.open-mpi.org/community/lists/users/2007/05/3323.php
On Jun 5, 2007, at 6:52 PM, smai...@ksu.edu wrote:
Hi,
I am trying a program in which I have 2 MPI nodes and each MPI node
has
2 threads:
Can you be a bit more descriptive? What is the exact compilation
output (including the error)? And what exactly do you mean by "debug
mode" -- compiling Open MPI with and without -g? Please see http://
www.open-mpi.org/community/help/.
FWIW, I do not see the symbol "output_local_symbols"
On Jun 7, 2007, at 2:07 AM, Code Master wrote:
I wish to compile openmpi-1.2.2 so that it:
- support MPI_THREAD_MULTIPLE
- enable profiling (generate gmon.out for each process after my
client app finish running) to tell apart CPU time of my client
program from the MPI library
- static linkin
On Jun 6, 2007, at 5:44 PM, Michael Edwards wrote:
I am runing open-mpi 1.1.1-1 compiled from OFED1.1 which I downloaded
from their website.
You might want to upgrade your Open MPI installation; the current
stable version is 1.2.2 (1.2.3 is pending shortly, fixing a few minor
regressions t
I wish to compile openmpi-1.2.2 so that it:
- support MPI_THREAD_MULTIPLE
- enable profiling (generate gmon.out for each process after my client app
finish running) to tell apart CPU time of my client program from the MPI
library
- static linking for everything (incl client app and all components
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