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<p class="MsoNormal">Hi, Stefan.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry to hear that you’re facing issues. We will take a look at this and get back to you soon.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Hari.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Mvapich-discuss <mvapich-discuss-bounces+subramoni.1=osu.edu@lists.osu.edu>
<b>On Behalf Of </b>Stefan Zellmann via Mvapich-discuss<br>
<b>Sent:</b> Wednesday, March 10, 2021 3:44 PM<br>
<b>To:</b> mvapich-discuss@lists.osu.edu<br>
<b>Subject:</b> [Mvapich-discuss] mvapich2-gdr 2.3.4 + CUDA managed memory<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<br>
<br>
I’m experiencing some random crashes with a CUDA-MPI program that I’d like to run on an RTX partition at TACC’s Frontera. In particular, I’m using non-blocking MPI calls with CUDA managed memory and I get some random issues (segfaults, oom) that _look like_
race conditions. The 2.3.5 docs say that managed memory support can be enabled via MV2_CUDA_ENABLE_MANAGED but I can’t find out if this was already supported in 2.3.4 (and hence the behavior being defined with that version). Attached is a minimal producer
that demonstrates things on Frontera, it should be easy to adapt that to other environments. Specifically, blocking calls + managed _seem_ to work (although maybe there _are_ race conditions but they’re so seldom I just didn’t see them yet..).<br>
<br>
Cheers,<br>
Stefan<o:p></o:p></p>
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