Hello, With openmpi-1.3, new mca feature is introduced
namely --mca routed binomial. This ensures out of band communication to happen
in binomial fashion and reduces the net socket opening and hence solves file
open issues.-NeerajOn Thu, 18 Sep 2008 16:46:23 -0700 Open MPI Users wrote
I'm
Hello everyone, I downloaded openmpi-1.3 version from night
tarballs to check RDMA-CM support. I am able to compile and install it, but
dont know how to run it as there is no documentation provided. Did someone try
running it with OpenMPI?My another question is Does OpenMPI1.3 has
progress-t
Hello everyone, I am facing problem while calling mpirun in a
loop when using with SGE. My sge version is SGE6.1AR_snapshot3. The script i am
submitting via sge is
xlet
i=0while [ $i -lt 100 ]do echo
"###
Dear All, I am wondering if ORTE can be run in persistent
mode. It has already been raised in Mailing list (
http://www.open-mpi.org/community/lists/users/2006/03/0939.php), where it
was said that the problem is still there. I just want to know, if its fixed or
being fixed ? Reason, why i
collective section in the MPI standard to see all the restrictions.
Thanks, george.On Dec 11, 2007, at 5:56 AM, Neeraj Chourasia wrote:
> Hello everyone, > > While going through collective
algorithms, I came across> preprocessor directive MPI_IN_PLACE which i
Hello everyone, While going through collective algorithms, I
came across preprocessor directive MPI_IN_PLACE which is (void *)1. Its always
being compared against source buffer(sbuf). My question is when MPI_IN_PLACE ==
sbuf condition would be true. As far as i understand, sbuf is the address
Hi Guys,
The alternative to THREAD_MULTIPLE problem is to use --mca
mpi_leave_pinned 1 to mpirun option. This will ensure 1 RDMA operation contrary
to splitting data in MAX RDMA size (default to 1MB).
If your data size is small say below 1 MB, program will run well with
THREAD_MULTIPLE. P
Hello Guys,
When is the version 1.3 scheduled to be released? As it would contain
checkpointing, library for non-blocking communication, ConnectX for QP's, it
would be great to have it ASAP. Since i am evaluating MVAPICH against OpenMPI,
i found that MVAPICH still has upper hand in terms of
Hello Everyone, I just want to add extra API to be used by
application guys. This API can be called from C application and has to be
compiled and linked by MPICC. But i am getting undefined references, even
though i am exporting it in the source code. Could some one tell me the steps,
i shou
, at
12:17 AM, Neeraj Chourasia wrote:> Hi folks, > > I have
been seeing some nasty behaviour in MPI_Send/Recv> with large dataset(8
MB), when used with OpenMP and Openmpi> together with IB Interconnect.
Attached is a program. > >
Hi folks, I have been seeing some
nasty behaviour in MPI_Send/Recv with large dataset(8 MB), when used with
OpenMP and Openmpi together with IB Interconnect. Attached is a
program. The code first calls MPI_Init_thread()
followed by openmp thread creation API. The program works fine
hi, We are facing some problem when calling MPI_Send over IB.
The problem looks similar to ticket
https://svn.open-mpi.org/trac/ompi/ticket/232, but this time its for IB
Interface. When forcefully running the program using --mca btl tcp,self its
running fine. On Ib, its giving error messa
Hi, Please ensure if following things are correct1) The array
bounds are equal. Means \"my_x\" and \"size_y\" has the same value on all
nodes.2) Nodes are homogenous. To check that, you could decide root to be some
different node and run the program-NeerajOn Fri, 26 Oct 2007 10:13:15 +0500
(
Hello Guys, I had openmpi v1.2 installed on my cluster.
Couple of days back, i thought to upgrade it to v1.2.4(latest release i
suppose). Since i didnt want to take risk, i first installed it on temporary
location and did bandwidth and bidirectional bandwidth test provided by the OSU
guys, a
Hi all, Could someone suggest me, how to compile programs
given in test directory of the source code? There are couple of directories
within test which contains sample programs about the usage of datastructures
being used by open-MPI. I am able to compile some of the directories at it was
ha
Yes, the buffer was being re-used. No we didnt try to benchmark it with netpipe
and other stuffs. But the program was pretty simple. Do you think, I need to
test it with bigger chunks (>8MB) for communication.?We also tried
manipulating eager_limit and min_rdma_sze, but no success.NeerajOn Fri,
Hi, The code was pretty simple. I was trying to send 8MB data
from one rank to other in a loop(say 1000 iterations). And then i was taking
the average of time taken and was calculating the bandwidth.The above logic i
tried with both mpirun-with-mca-parameters and without any parameters. And t
Dear All, Could anyone tell me the important tuning
parameters in openmpi with IB interconnect? I tried setting eager_rdma,
min_rdma_size, mpi_leave_pinned parameters from the mpirun command line on 38
nodes cluster (38*2 processors) but in vain. I found simple mpirun with no mca
parameters
Hi everybody, I have a doubt regarding ORTE. One of the major
functionality of orte is to maintain GPR, which subscribes and publishes
information to the universe. I have a doubt saying, when we submit job from a
machine, where does GPR gets created? Is it on the submit machine (HNP)?if YES,
Hello Everyone, I was checking the development version from
svn and found that support for libnbc is going to come in next release. I
thought of compiling it, but failed to do.Could some one suggest me how to get
it compiled.When i made changes to configure script(Basically added some
flags)
If you are using scheduler like PBS or SGE over MPI, there is an option
called prolog and epilog, where you can give scripts which does copy
operation. This script is called before and after job execution as the
name suggests.
Without it, in mpi itself, i have to see, if it can be done.
T
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