Re: [OMPI users] Low CPU utilization

2016-10-16 Thread Reuti
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

[OMPI users] Low CPU utilization

2016-10-16 Thread 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 108156 1300 ?S21:58 0:00 /bin/bash /share/apps/chemistry/

Re: [OMPI users] OMPI users] low CPU utilization with OpenMPI

2014-10-24 Thread Gilles Gouaillardet
are you trying to use? >> > >> >> On Oct 22, 2014, at 7:12 PM, Vinson Leung wrote: >> >> >> >> Thanks for your reply:) >> >> Follow your advice I tried to set the TMPDIR to /var/tmp and /dev/shm and >> >> even reset to /t

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-24 Thread Jeff Squyres (jsquyres)
e I tried to set the TMPDIR to /var/tmp and /dev/shm and > >> even reset to /tmp (I get the system permission), the problem still occur > >> (CPU utilization still lower than 20%). I have no idea why and ready to > >> give up OpenMPI instead of using other MPI library. > >> > >

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Vinson Leung
em permission), the problem still > occur (CPU utilization still lower than 20%). I have no idea why and ready > to give up OpenMPI instead of using other MPI library. > >> > >> Old Message- > >> > >> Date: Tue, 21 Oct 2014 22:21:31 -04

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Vinson Leung
oblem still >>> occur (CPU utilization still lower than 20%). I have no idea why and ready >>> to give up OpenMPI instead of using other MPI library. >>> >>> Old Message- >>> >>> Date: Tue, 21 Oct 2014 22:21:31 -0400 >&g

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Jeff Squyres (jsquyres)
er than 20%). I have no idea why and ready to give >> up OpenMPI instead of using other MPI library. >> >> Old Message- >> >> Date: Tue, 21 Oct 2014 22:21:31 -0400 >> From: Brock Palen >> To: Open MPI Users >> Subject: Re: [O

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Joshua Ladd
blem still occur >> (CPU utilization still lower than 20%). I have no idea why and ready to >> give up OpenMPI instead of using other MPI library. >> >> Old Message- >> >> Date: Tue, 21 Oct 2014 22:21:31 -0400 >> From: Brock Palen >>

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Vinson Leung
using other MPI library. > > Old Message- > > Date: Tue, 21 Oct 2014 22:21:31 -0400 > From: Brock Palen > To: Open MPI Users > Subject: Re: [OMPI users] low CPU utilization with OpenMPI > Message-ID: > Content-Type: text/plain; charset=us-ascii > > Doi

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-23 Thread Ralph Castain
ing other MPI library. > > Old Message- > > Date: Tue, 21 Oct 2014 22:21:31 -0400 > From: Brock Palen mailto:bro...@umich.edu>> > To: Open MPI Users mailto:us...@open-mpi.org>> > Subject: Re: [OMPI users] low CPU utilization with OpenMPI &g

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-22 Thread Vinson Leung
. Old Message- List-Post: users@lists.open-mpi.org Date: Tue, 21 Oct 2014 22:21:31 -0400 From: Brock Palen To: Open MPI Users Subject: Re: [OMPI users] low CPU utilization with OpenMPI Message-ID: Content-Type: text/plain; charset=us-ascii Doing special files on NFS can be

Re: [OMPI users] low CPU utilization with OpenMPI

2014-10-21 Thread Brock Palen
Doing special files on NFS can be weird, try the other /tmp/ locations: /var/tmp/ /dev/shm (ram disk careful!) Brock Palen www.umich.edu/~brockp CAEN Advanced Computing XSEDE Campus Champion bro...@umich.edu (734)936-1985 > On Oct 21, 2014, at 10:18 PM, Vinson Leung wrote: > > Because of p

[OMPI users] low CPU utilization with OpenMPI

2014-10-21 Thread Vinson Leung
Because of permission reason (OpenMPI can not write temporary file to the default /tmp directory), I change the TMPDIR to my local directory (export TMPDIR=/home/user/tmp ) and then the MPI program can run. But the CPU utilization is very low under 20% (8 MPI rank running in Intel Xeon 8-core CPU).

[OMPI users] Low cpu utilization due to high IO operations of openmpi

2012-10-21 Thread Mahmood Naderan
Dear all, We have a diskless cluster with these specs: 1) A server which has some disks. Root directories (/usr, /lib, ...) are on /dev/sda while /home is on /dev/sdb and these are two physical hard drives. 2) Some compute nodes. These don't have any disk drive instead they are connected thr