Hi. I know this is an old thread, but I'm curious if there are any
tutorials describing how to set this up? Is this still available on
newer open mpi versions?
Thanks,
Brian
On Fri, Jan 4, 2008 at 7:57 AM, Ralph Castain wrote:
> Hi Elena
>
> I'm copying this to the user list just to correct
Hello!
I've built openmpi 1.6.1rc3 with support of MXM. But when I try to launch
an application using this mtl it hangs and can't figure out why.
If I launch it with np below 128 then everything works fine since mxm isn't
used. I've tried setting the threshold to 0 and launching 2 processes with
Hello,
Intel MPI Benchmarks suite
(http://software.intel.com/en-us/articles/intel-mpi-benchmarks/) will probably
measure more things about your MPI environment than you'd ever need to know :)
NetPIPE (http://www.scl.ameslab.gov/netpipe/) also has an MPI version. It
measures point-to-point band
That's fine. In that case, you just compile it with your MPI
implementation and do something like this:
mpiexec -np 2 -H masterhostname,slavehostname ./osu_latency
There may be some all-to-all latency tools too. I don't really remember.
Lloyd Brown
Systems Administrator
Fulton Supercomputing L
On Tue, Aug 21, 2012 at 6:34 PM, Lloyd Brown wrote:
> I'm not really familiar enough to know what you mean by "em slaves", but
> for general testing of bandwidth and latency, I usually use the "OSU
> Micro-benchmarks" (see http://mvapich.cse.ohio-state.edu/benchmarks/).
>
> Lloyd Brown
> Systems A
I'm not really familiar enough to know what you mean by "em slaves", but
for general testing of bandwidth and latency, I usually use the "OSU
Micro-benchmarks" (see http://mvapich.cse.ohio-state.edu/benchmarks/).
Lloyd Brown
Systems Administrator
Fulton Supercomputing Lab
Brigham Young University
Hello.
How do you suggest me to measure the latency between master em slaves
in my cluster? Is there any tool that I can use to test the
performance of my environment?
Thanks
--
Maginot Júnior
Have you looked thru the code in orte/mca/plm/rsh/plm_rsh_module.c? It is
executing a tree-like spawn pattern by default, but there isn't anything magic
about what ssh is doing. However, there are things done to prep the remote
shell (setting paths etc.), and the tree spawn passes some additiona
Le 20/08/2012 15:56, Ralph Castain wrote :
> You might try adding "-mca plm_base_verbose 5 --debug-daemons" to
watch the debug output from the daemons as they are launched.
There seems to be an interference here: my problem is "solved" by
enabling option --debug-daemons with a verbose level >
Hello, Devendra,
Sending and receiving messages in MPI are atomic operations - they complete
only when the whole message was sent or received. MPI_Test only tells you if
the operation has completed - there is no indication like "30% of the message
was sent/received, stay tuned for more".
On th
Hi Devendra
MPI has no way of knowing how big your receive buffer is -
that's why you have to pass the "count" argument, to tell MPI
how many items of your data type (in your case many bytes)
it may copy to your receive buffer.
When data arrives that is longer than the number you
specified in the
Hello Jeff and Hristo,
Now I am completely confused:
So, let's say, the complete reception requires 8192 bytes. And, I have:
MPI_Irecv(
(void*)this->receivebuffer,/* the receive buffer */
this->receive_packetsize, /* 80 */
Jeff,
>> Or is it the number of elements that are expected to be received, and hence
>> MPI_Test will tell me that the receive is not complete untill "count" number
>> of elements have not been received?
>
> Yes.
Answering "Yes" this question might further the confusion there. The "count"
arg
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