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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
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 <ashley_at_[hidden]> 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.