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<p class="MsoNormal">Yeah, as Wesley suggested, it will shed more light if you try
<span style="color:black">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.</span><o:p></o:p></p>
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<p class="MsoNormal">-- <br>
Hui Zhou<o:p></o:p></p>
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<b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Bland, Wesley via discuss <discuss@mpich.org><br>
<b>Date: </b>Wednesday, June 16, 2021 at 8:47 AM<br>
<b>To: </b>Antonio J. Peña <antonio.pena@bsc.es><br>
<b>Cc: </b>Bland, Wesley <wesley.bland@intel.com>, MPICH Discuss <discuss@mpich.org><br>
<b>Subject: </b>Re: [mpich-discuss] libfabric+psm2 performance<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:13.5pt;font-family:"-webkit-standard",serif;color:black">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.</span><o:p></o:p></p>
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