or any link which helps to understand system reuirement for certain test
scenario ..
On Apr 23, 2009 12:42pm, viral@gmail.com wrote:
Hi
Thanks for your response.
However, I am running
mpiexec -ppn 24 -n 192 /opt/IMB-MPI1 alltaoll -msglen /root/temp
And file /root/temp contains entry upto 65535 size only. That means
alltoall test will run upto 65K size only
So, in that case I will require very less memory but then in that case
also test is running out-of-memory. Please help someone to understand the
scenario.
Or do I need to switch to some algorithm or do I need to set some other
environment variables ? or anything like that ?
On Apr 22, 2009 6:43pm, Ashley Pittman ash...@pittman.co.uk> wrote:
> On Wed, 2009-04-22 at 12:40 +0530, vkm wrote:
>
>
>
> > The same amount of memory required for recvbuf. So at the least each
>
> > node should have 36GB of memory.
>
> >
>
> > Am I calculating right ? Please correct.
>
>
>
> Your calculation looks correct, the conclusion is slightly wrong
>
> however. The Application buffers will consume 36Gb of memory, the rest
>
> of the application, any comms buffers and the usual OS overhead will be
>
> on top of this so putting only 36Gb of ram in your nodes will still
>
> leave you short.
>
>
>
> Ashley,
>
>
>
