Thank you folks. I'd have loved to get an older libfabric, but an oldish kernel version at MN4 prevented me from compiling a more recent one.

I'll give your suggestions a try once I get the chance to spend some more time on this.

  Toni


El 16/6/21 a las 21:47, Zhou, Hui escribió:

Yeah, as Wesley suggested, it will shed more light if you try set the environment variable MPIR_CVAR_CH4_OFI_CAPABILITY_SETS_DEBUG and get some diagnostics. We haven’t tested against such old libfabric for a while so some discrepancy in the capability set may have crept in.

 

-- 
Hui Zhou

 

 

From: Bland, Wesley via discuss <discuss@mpich.org>
Date: Wednesday, June 16, 2021 at 8:47 AM
To: Antonio J. Peña <antonio.pena@bsc.es>
Cc: Bland, Wesley <wesley.bland@intel.com>, MPICH Discuss <discuss@mpich.org>
Subject: Re: [mpich-discuss] libfabric+psm2 performance

If you set the environment variable MPIR_CVAR_CH4_OFI_CAPABILITY_SETS_DEBUG, it will print out the capability set (and provider) that MPICH is using so you can confirm.


-- 
Antonio J. Peña (PhD)
Team Lead, Accelerators and Communications for HPC | Teaching and Research Staff
Sr. Researcher, Computer Sciences Department       | Computer Architecture Department
Barcelona Supercomputing Center (BSC)              | Universitat Politècnica de Catalunya (UPC)
http://www.bsc.es/pena-antonio
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