Jeff, George, Ralph
Thanks a lot for your clarifications!!
- Ananda
--- PREVIOUS MESSAGE ---
Subject: Re: [OMPI devel] Warning on fork() disappears if I use MPI
threads!!
From: Jeff Squyres (jsquyres_at_[hidden])
List-Post: devel@lists.open-mpi.org
Date: 2010-1
George
Thanks for the explanation. I am trying to understand the following line
in your mail:
"In fact, any fork done prior to the communication is a non-issue, but
it is difficult to identify. Therefore, we output the warning as soon as
we detect a fork after MPI_Init."
Does it mean that if I h
Jeff
I am invoking MPI_Init_thread() with MPI_THREAD_MULTIPLE. If openib BTL
is responsible for the warning and openib BTL is excluded in this case,
then that explains the discrepancy.
FYI, I invoked MPI_Init_thread() with MPI_THREAD_SERIALIZED and I got
the warning message about the fork().
Tha
I am posting this question again as it was sent before the long weekend
and didn't see any responses so far. Can anyone please explain the
discrepancy I am observing with the scenario explained in the post
below?
Thanks
Ananda
Sent: Tuesday, November 23, 2010 2:24 PM
To: de...@open-mpi.org
Sub
Hi
I am running into a very wierd problem.
If I initialize MPI normally ie; with MPI_Init(), and make one of the MPI
process to do "popen()" call, I get the following warning/error message:
== Message start ===
An MPI process has executed an operation involving a call to the
"fork()" system cal
Jeff
Yes, I am calling MPI_Init_thread() with MPI_THREAD_MULTIPLE. And I have
enabled thread and mpi_threads while configuring OpenMPI. BTW, I am
using OpenMPI 1.4.2.
It will be helpful to know if this is a design constraint or some
implementation defect.
Regards
Ananda
Ananda B Mudar,
Hi
I have the following small program where the rank-0 process does sleep
and then all the processes perform barrier().
#include "mpi.h"
#include
int main(int argc, char *argv[])
{
int rank, nprocs;
MPI_Init(&argc,&argv);
MPI_Comm_size(MPI_COMM_WORLD,&nprocs);
MPI_Com
Hello Samuel
Like I said in my earlier response, I have never tried this option. So I
ran these tests on 1.4.2 now and apparently the behavior is same ie; the
checkpoint creation time increases when I enable shared memory
componentL
Is there any parameter that can be tuned to improve the performa
Hello Samuel
This problem seems to be resolved after I moved to r23781. However, I
see another discrepancy in checkpoint image creation time when I disable
shared memory (--mca btl self,tcp,openib) vs using it. I mean the time
to create checkpoint image for this simple program is about 0.4 seconds
I have used following options to build:
./configure CC=/usr/bin/gcc CXX=/usr/bin/c++ F77=/usr/bin/gfortran
FC=/usr/bin/gfortran --prefix /users/amudar/openmpi-1.7
--with-tm=/usr/local/pbs --with-openib --with-threads=posix
--enable-mpi-thread-multiple --enable-ft-thread --enable-debug --with-ft=
Hi
I believe the new common shared memory component was committed to the
trunk sometime towards the later part of August. I had not tried this
trunk version until last week and I have seen some discrepancy with this
component specifically related to checkpoint functionality. I am not
able to che
I downloaded the nightly build of the trunk (r23756) and found that the
checkpoint functionality is broken. My MPI program is a simple helloworld
program incrementing and printing the number every few seconds once.
Following are the steps:
1. mpirun with NP set to 32
2. call ompi-checkpoint with
Hello Sylvain
Thanks for your explanation.
I tried using -mca coll basic,sync option also and I still see the same
issue ie; the process size increases at an alarming rate. As you see, I
am not allocating any memory inside my program.
Regards
Ananda
--- Original Message ---
Hi
When I run the attached program with the following arguments, the size of MPI
processes keep increasing alarmingly (I saw that the size grew from 18M to 12G
in under 10 minutes) making me suspect that there is a major memory leak:
mpirun -am ft-enable-cr --mca coll basic -np 2
If I run thi
Josh
In the file ompi/mca/crcp/bkmrk/crcp_bkmrk_pml.h, I have a question on
the way few of the members of the following structures are defined:
ompi_crcp_bkmrk_pml_drain_message_ref_t
ompi_crcp_bkmrk_pml_traffic_message_ref_t
Under the definition of "ompi_crcp_bkmrk_pml_drain_message_ref_t"
There is a typo in my previous posting. I have configured OpenMPI
library with "-with-ft=cr".
Thanks
Ananda
From: Ananda Babu Mudar (WT01 - Energy and Utilities)
Sent: Monday, August 23, 2010 11:50 AM
To: 'de...@open-mpi.org'
Subject: Question on MCA_BASE_METADATA_PARAM_NONE
Hi
In the file
Hi
In the file "mca_base_components_open.c", following code checks for the
components that are checkpointable. If I configure OpenMPI library with
"-enable-cr" option, I was under the assumption that all components will
be checkpointable. However I see that quite a few components are not
checkpoin
17 matches
Mail list logo
