Have you checked where the procs are actually bound? I’m wondering if you don’t
wind up somehow with a proc bound to cores on different sockets
> On Jul 6, 2015, at 7:06 AM, Saliya Ekanayake wrote:
>
> Just checking if anyone has experienced a similar situation or has any
> pointers to underst
Just checking if anyone has experienced a similar situation or has any
pointers to understand this.
Thank you
Saliya
On Jul 1, 2015 9:27 PM, "Saliya Ekanayake" wrote:
> Hi,
>
> I am getting strange performance results for allgatherv operation for the
> same number of procs and data, but with var
Hi,
I am getting strange performance results for allgatherv operation for the
same number of procs and data, but with varying binding width. For example
here are two cases with about 180x difference in performance.
Each machine has 4 sockets each with 6 cores totaling 24 cores per node
(topology
