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I haven't used CUDA graph with PETSc. Do you happen to have a working example so we can debug? --Junchao Zhang On Tue, May 14, 2024 at 6: 08 PM Sreeram R Venkat <srvenkat@ utexas. edu> wrote: I have a MatShell object that I want to convert
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<div dir="ltr"><div><br></div><div>I haven't used CUDA graph with PETSc. Do you happen to have a working example so we can debug?</div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">--Junchao Zhang</div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 14, 2024 at 6:08 PM Sreeram R Venkat <<a href="mailto:srvenkat@utexas.edu">srvenkat@utexas.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-306059168063068977">
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I have a MatShell object that I want to convert to a MATDENSECUDA. Normally, I use MatComputeOperator for this. However, I would now also like to use a CUDA Graph so that all the calls to MatMult are captured. I can wrap a code like for (int
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<div dir="ltr"><div dir="ltr" class="gmail_signature"><div dir="ltr"><div style="color:rgb(34,34,34)">I have a MatShell object that I want to convert to a MATDENSECUDA. Normally, I use MatComputeOperator for this. However, I would now also like to use a CUDA Graph so that all the calls to MatMult are captured. I can wrap a code like</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">for (int i = 0; i < N; i++)</div><div style="color:rgb(34,34,34)"> MatMult(A, x,y);</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">in a CUDA Graph, and it runs fine. If I try to wrap MatComputeOperator in a graph, I get runtime errors like</div><div style="color:rgb(34,34,34)"> cuda error 906 (cudaErrorStreamCaptureImplicit) : operation would make the legacy stream depend on a capturing blocking stream</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">I tried modifying the MatConvert_Shell routine to only put the graph around the main for loop, but that still gives the same errors. Is there a way to use CUDA Graphs here (either through a modified MatConvert_Shell or otherwise)?</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">Thanks,</div><div style="color:rgb(34,34,34)">Sreeram</div></div></div></div>
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