Very useful!
Thank you Ralph.
Albert
On Fri 23 May 2014 15:26:58 BST, Ralph Castain wrote:
On May 23, 2014, at 7:14 AM, Albert Solernou
wrote:
Well,
the problem is that I don't know how to do any of these things
Ah! You might want to read this:
http://www.open-mpi.org/faq/?category=tuni
On May 23, 2014, at 7:14 AM, Albert Solernou
wrote:
> Well,
> the problem is that I don't know how to do any of these things
Ah! You might want to read this:
http://www.open-mpi.org/faq/?category=tuning#mca-params
> , so more explicitly:
> - does OpenMPI accept any environment variable that
Well,
the problem is that I don't know how to do any of these things, so more
explicitly:
- does OpenMPI accept any environment variable that prevents binding
like MV2_ENABLE_AFFINITY does on MVAPICH2?
- what is the default mca param file? Is it a runtime file? or a
configuration file? how do
On May 23, 2014, at 6:58 AM, Albert Solernou
wrote:
> Hi,
> thanks a lot for your quick answers, and I see my error, it is "--bind-to
> none" instead of "--bind-to-none".
>
> However, I need to be able to run "mpirun -np 2" without any binding argument
> and get a "--bind-to none" behaviour.
Hi,
thanks a lot for your quick answers, and I see my error, it is
"--bind-to none" instead of "--bind-to-none".
However, I need to be able to run "mpirun -np 2" without any binding
argument and get a "--bind-to none" behaviour. I don't know if I can
export an environment variable to do that,
Note that the lama mapper described in those slides may not work as it hasn't
been maintained in a while. However, you can use the map-by and bind-to options
to do the same things.
If you want to disable binding, you can do so by adding "--bind-to none" to the
cmd line, or via the MCA param "hw
Albert,
Actually doing affinity correctly for hybrid got easier in OpenMPI 1.7 and
newer, In the past you had to make a lot of assumptions, stride by node etc,
Now you can define a layout:
http://blogs.cisco.com/performance/eurompi13-cisco-slides-open-mpi-process-affinity-user-interface/
Broc
Hi,
after compiling and installing OpenMPI 1.8.1, I find that OpenMPI is
pinning processes onto cores. Although this may be
desirable on some cases, it is a complete disaster when runnning hybrid
OpenMP-MPI applications. Therefore, I want to disable this behaviour,
but don't know how.
I confi
