e_timestep_loop --animation_freq -1
>
> I run above command, still do not improve. Would you give me a detailed
> command with options?
> Thank you.
>
> Best regards,
>
> Yuping
>
>
> ----
> On Tue, 6/17/14, Ralph Castain w
Well, yes and no. Besides the real question would be if this app, which this
person didn't write, was written as a threaded application.
On Jun 16, 2014, at 8:32 PM, Zehan Cui wrote:
> Hi Yuping,
>
> Maybe using multi-threads inside a socket, and MPI among sockets is better
> choice for such
Hi Yuping,
Maybe using multi-threads inside a socket, and MPI among sockets is better
choice for such NUMA platform.
Multi-threads can exploit the benefit of share memory, and MPI can
alleviate the cost of non-uniform memory access.
regards,
Zehan
On Tue, Jun 17, 2014 at 6:19 AM, Yuping Sun
.
Best regards,
Yuping
On Tue, 6/17/14, Ralph Castain wrote:
Subject: Re: [OMPI users] how to get mpirun to scale from 16 to 64 cores
To: "Yuping Sun" , "Open MPI Users"
Date: Tuesday, June 17, 2014, 1:59 AM
Well, for one,
Well, for one, there is never any guarantee of linear scaling with the number
of procs - that is very application dependent. You can actually see performance
decrease with number of procs if the application doesn't know how to exploit
them.
One thing that stands out is your mapping and binding
Dear All:
I bought a 64 core workstation and installed NASA fun3d with open mpi 1.6.5.
Then I started to test run fun3d using 16, 32, 48 cores. However the
performance of the fun3d run is bad. I got data below:
the run command is (it is for 32 core as an example)
mpiexec -np 32 --bysocket --bi
