[OMPI users] How to yield CPU more when not computing (was curious behavior during wait for broadcast: 100% cpu)

I would like to see if there are any updates re this thread back from 2010: https://mail-archive.com/users@lists.open-mpi.org/msg15154.html I've got 3 boxes at home, a laptop and 2 other quadcore nodes . When the CPU is at 100% for a long time, the fans make quite some noise:-) The laptop runs t

[OMPI users] mpirun works with cmd line call , but not with app context file arg

Hi, openmpi 1.10.3 this call: mpirun --hostfile ~/.mpihosts -H localhost -np 1 prog1 : -H A.lan -np 4 prog2 : -H B.lan -np 4 prog2 works, yet this one: mpirun --hostfile ~/.mpihosts --app ~/.mpiapp doesn't. where ~/.mpiapp -H localhost -np 1 prog1 -H A.lan -np 4 prog2 -H B.lan -np 4 prog2

Re: [OMPI users] mpirun works with cmd line call , but not with app context file arg

Out of curiosity, why do you specify both --hostfile and -H ? Do you observe the same behavior without --hostfile ~/.mpihosts ? Also, do you have at least 4 cores on both A.lan and B.lan ? Cheers, Gilles On Sunday, October 16, 2016, MM wrote: > Hi, > > openmpi 1.10.3 > > this call: > > mpirun

Re: [OMPI users] How to yield CPU more when not computing (was curious behavior during wait for broadcast: 100% cpu)

If you want to keep long-waiting MPI processes from clogging your CPU pipeline and heating up your machines, you can turn blocking MPI collectives into nicer ones by implementing them in terms of MPI-3 nonblocking collectives using something like the following. I typed this code straight into this

[OMPI users] Low CPU utilization

Hi, I am running two softwares that use OMPI-2.0.1. Problem is that the CPU utilization is low on the nodes. For example, see the process information below [root@compute-0-1 ~]# ps aux | grep siesta mahmood 14635 0.0 0.0 108156 1300 ?S21:58 0:00 /bin/bash /share/apps/chemistry/

Re: [OMPI users] Low CPU utilization

Hi, Am 16.10.2016 um 20:34 schrieb Mahmood Naderan: > Hi, > I am running two softwares that use OMPI-2.0.1. Problem is that the CPU > utilization is low on the nodes. > > > For example, see the process information below > > [root@compute-0-1 ~]# ps aux | grep siesta > mahmood 14635 0.0 0.0

Re: [OMPI users] mpirun works with cmd line call , but not with app context file arg

On 16 October 2016 at 14:50, Gilles Gouaillardet wrote: > Out of curiosity, why do you specify both --hostfile and -H ? > Do you observe the same behavior without --hostfile ~/.mpihosts ? When I specify only -H like so: mpirun -H localhost -np 1 prog1 : -H A.lan -np 4 prog2 : -H B.lan -np 4 pro

[OMPI users] Performing partial calculation on a single node in an MPI job

Hello, I am attempting to modify a relatively large code (Quantum Espresso/EPW) and here I will try to summarize the problem in general terms. I am using an OPENMPI-compiled fortran 90 code in which, midway through the code, say 10 points x(3,10) are broadcast across say 4 nodes. The index 3

Re: [OMPI users] Performing partial calculation on a single node in an MPI job

Vahid, You cannot use Fortan's vector subscript with MPI. Are you certain that the arrays used in your bcast are contiguous ? If not you would either need to move the data first into a single dimension array (which will then have the elements contiguously in memory), or define specialized datatyp