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<p class="MsoNormal">Hi John,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">You mention messaging (send/recv) in your question; if FI_MR_LOCAL is not required, then for those operations the registration for local access is transparent to the client and multiple EP within the same domain/VA space could transparently
share the underlying DMA mapping.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For RMA (write/read/amo) where remote MR are explicitly registered, bound and enabled, there is a good discussion here:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://github.com/ofiwg/libfabric/discussions/7321">https://github.com/ofiwg/libfabric/discussions/7321</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Steve<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Libfabric-users <libfabric-users-bounces@lists.openfabrics.org> on behalf of Biddiscombe, John A. <john.biddiscombe@cscs.ch><br>
<b>Date: </b>Thursday, September 1, 2022 at 4:22 AM<br>
<b>To: </b>libfabric-users@lists.openfabrics.org <libfabric-users@lists.openfabrics.org><br>
<b>Subject: </b>[libfabric-users] FI_MR_ENDPOINT question<o:p></o:p></span></p>
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<p><span style="font-size:12.0pt;color:black">For machines that set the <em><span style="font-family:"Calibri",sans-serif">FI_MR_ENDPOINT</span></em> flag - we must bind memory regions to an endpoint.<o:p></o:p></span></p>
<p><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p><span style="font-size:12.0pt;color:black">If I use a separate endpoint for sending and receiving, or worse, threadlocal endpoints (for sending), or a scalable endpoint (for sending)<o:p></o:p></span></p>
<p><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p><span style="font-size:12.0pt;color:black">Must I only use memory regions bound to the exact endpoint I'm actually using for a send or receive operation (meaning threadlocal pools of registered memory for a threadlocal endpoint setup and separate pools
of memory for send/receive).<o:p></o:p></span></p>
<p><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p><span style="font-size:12.0pt;color:black">How strict are the rules? If I bind memory to endpoint 1, and send using endpoint 2 - will it break? <o:p></o:p></span></p>
<p><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p><span style="font-size:12.0pt;color:black">thanks...<o:p></o:p></span></p>
<p><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p><span style="font-size:12.0pt;color:black">JB<o:p></o:p></span></p>
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