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Hello, I am trying to learn about MPICH and its performance over RDMA. I am using libfabric and installed mpich using the below configure. ./configure --prefix=/opt/mpich/ --with-ofi=/opt/libfabric/ When I run any applications between 2 directly
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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">Hello, </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">I am trying to learn about MPICH and its performance over RDMA.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">I am using libfabric and installed mpich using the below configure.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">./</span><b><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:#CA3323">configure</span></b><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black"> --prefix=/opt/mpich/ --with-ofi=/opt/libfabric/</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">When I run any applications between 2 directly connected servers having Mellanox NICs, I see that communication is happening over tcp and not over RoCE.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">Is there any way to test commination over RoCE ?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">For eg. I was able to test it for libfabric using the below sample that comes along with libfabric to test RMA.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">Is there something similar for MPICH ? or use the current sample to use RoCE by some parameter?</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">Server : </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">fi_rma_bw -s 192.168.1.100 -e msg -d mlx5_1 -S 1024 -I 1 </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">Client :</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Abadi",sans-serif;color:black">fi_rma_bw -s 192.168.1.200 -e msg -d mlx5_3 192.168.1.100 -S 1024 -I 1 </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black">Regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black">Niyaz</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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