[mvapich-discuss] Memory limit problem

[Hari Subramoni]

Hello Luis,

Sorry to hear that you are facing an issue with OMB and thanks for
reporting the issue.

The following patch should fix the issue. Could you please apply it (patch
-p1< <patch_file>) and let me know if things work well?

diff --git a/osu_benchmarks/mpi/collective/osu_coll.c
b/osu_benchmarks/mpi/collective/osu_coll.c
index 41f130d..87e8cc4 100644
--- a/osu_benchmarks/mpi/collective/osu_coll.c
+++ b/osu_benchmarks/mpi/collective/osu_coll.c
@@ -225,7 +225,7 @@ set_num_probes (int value)
 }

 static int
-set_max_memlimit (int value)
+set_max_memlimit (long long value)
 {
     options.max_mem_limit = value;

Thx,
Hari.

On Fri, Aug 4, 2017 at 11:25 AM, Luis Cebamanos <l.cebamanos at epcc.ed.ac.uk>
wrote:

> Dear MVAPICH team,
>
> I have been running the MPI Collective benchmarks and I am sorry to say
> that I am facing the memory limit problem for 2GB values.
> The following works
> mpiexec_mpt -n 36 -ppn 36 osu_gather  -m 1048576 -M 2147483647
> <(214)%20748-3647>
>
> but this doesn't
> mpiexec_mpt -n 36 -ppn 36 osu_gather  -m 1048576 -M 2147483648
> <(214)%20748-3648>
>
> Requested memory limit too low, using [1048576] instead.Requested memory
> limit too low, using [1048576] instead.
>
> I am using version 5.3.2 which CHANGES file include:
>
> * New Features & Enhancements
>     - Allow specifying very large message sizes (>2GB) for collective benchmarks
>
> I hope this helps.
>
> Regards,
>
> Luis Cebamanos
>
> HPC Applications Consultant
> EPCC, Edinburgh
>
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
>
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>
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