Hello,
>The code was pretty simple. I was trying to send 8MB data from one
>rank to other in a loop(say 1000 iterations). And then i was taking the
>average of time taken and was calculating the bandwidth.
>
>The above logic i tried with both mpirun-with-mca-parameters and with
Yes, the buffer was being re-used. No we didnt try to benchmark it with netpipe
and other stuffs. But the program was pretty simple. Do you think, I need to
test it with bigger chunks (>8MB) for communication.?We also tried
manipulating eager_limit and min_rdma_sze, but no success.NeerajOn Fri,
On Oct 12, 2007, at 8:38 AM, Neeraj Chourasia wrote:
Yes, the buffer was being re-used. No we didnt try to benchmark it
with netpipe and other stuffs. But the program was pretty simple.
Do you think, I need to test it with bigger chunks (>8MB) for
communication.?
We also tried manipulating
The mailing list snipped off the end of my mail -- here's the rest of
what I said:
The meanings of the 3 phases are explained in this pager: http://
www.open-mpi.org/papers/euro-pvmmpi-2006-hpc-protocols.
If you use the mpi_leave_pinned parameter and Open MPI is able to
leave your entire buffe
-- Forwarded Message
From: Richard Graham
Reply-To: "mpi...@mpi-forum.org"
List-Post: users@lists.open-mpi.org
Date: Fri, 12 Oct 2007 12:48:04 -0400
To: "mpi...@mpi-forum.org"
Conversation: SC'07 MPI Forum organization meeting
Subject: [mpi-21] SC'07 MPI Forum organization meeting
As previ
> That's the same for R. We don;t touch the innert guts of module loading for
> this . What Hao realized after looking at the corresponding FAQ item was that
> right before calling MPI_Init, one can load libmpi explicitly, and -- and
> that;s the important bit -- set the proper RTLD_GLOBAL argument
> My guess is that Rmpi is dynamically loading libmpi.so, but not
> specifying the RTLD_GLOBAL flag. This means that libmpi.so is not
> available to the components the way it should be, and all goes
> downhill from there. It only mostly works because we do something
> silly with how we link most
Brian,
On 12 October 2007 at 13:55, Brian Granger wrote:
| > My guess is that Rmpi is dynamically loading libmpi.so, but not
| > specifying the RTLD_GLOBAL flag. This means that libmpi.so is not
| > available to the components the way it should be, and all goes
| > downhill from there. It only
Hi,
>Yes, the buffer was being re-used. No we didnt try to benchmark it with
>netpipe and other stuffs. But the program was pretty simple. Do you think,
>I need to test it with bigger chunks (>8MB) for communication.?
>We also tried manipulating eager_limit and min_rdma_sze, but no
