k..Thank you all.
That has solved.
On Fri, Nov 4, 2016 at 8:24 PM, r...@open-mpi.org wrote:
> All true - but I reiterate. The source of the problem is that the
> "--map-by node” on the cmd line must come *before* your application.
> Otherwise, none of these suggestions will help.
>
> > On Nov 4
All true - but I reiterate. The source of the problem is that the "--map-by
node” on the cmd line must come *before* your application. Otherwise, none of
these suggestions will help.
> On Nov 4, 2016, at 6:52 AM, Jeff Squyres (jsquyres)
> wrote:
>
> In your case, using slots or --npernode or
In your case, using slots or --npernode or --map-by node will result in the
same distribution of processes because you're only launching 1 process per node
(a.k.a. "1ppn").
They have more pronounced differences when you're launching more than 1ppn.
Let's take a step back: you should know that O
As long as you run 3 MPI tasks, both options will produce the same mapping.
If you want to run up to 12 tasks, then --map-by node is the way to go
Mahesh Nanavalla wrote:
>s...
>
>
>Thanks for responding me.
>
>i have solved that as below by limiting slots in hostfile
>
>
>root@OpenWrt:~#
Mahesh,
Depending what you are trying to accomplish, might using the mpirun option
-pernode -o- --pernode
work for you? That requests that only one process be spawned per
available node.
We generally use this for hybrid codes, where the single process will
spawn threads to the remaining proc
s...
Thanks for responding me.
i have solved that as below by limiting* slots in hostfile*
root@OpenWrt:~# cat myhostfile
root@10.73.145.1 slots=1
root@10.74.25.1 slots=1
root@10.74.46.1 slots=1
I want the difference between the *slots* limiting in myhostfile and
runnig *--map-by
node
My apologies - the problem is that you list the option _after_ your executable
name, and so we think it is an argument for your executable. You need to list
the option _before_ your executable on the cmd line
> On Nov 4, 2016, at 4:44 AM, Mahesh Nanavalla
> wrote:
>
> Thanks for reply,
>
>
Thanks for reply,
But,with space also not running on one process one each node
root@OpenWrt:~# /usr/bin/mpirun --allow-run-as-root -np 3 --hostfile
myhostfile /usr/bin/openmpiWiFiBulb --map-by node
And
If use like this it,s working fine(running one process on each node)
*/root@OpenWrt:~#/usr/bi
you mistyped the option - it is “--map-by node”. Note the space between “by”
and “node” - you had typed it with a “-“ instead of a “space”
> On Nov 4, 2016, at 4:28 AM, Mahesh Nanavalla
> wrote:
>
> Hi all,
>
> I am using openmpi-1.10.3,using quad core processor(node).
>
> I am running 3 pr
Hi all,
I am using openmpi-1.10.3,using quad core processor(node).
I am running 3 processes on three nodes(provided by hostfile) each node
process is limited by --map-by-node as below
*root@OpenWrt:~# /usr/bin/mpirun --allow-run-as-root -np 3 --hostfile
myhostfile /usr/bin/openmpiWiFiBulb --map
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