<div dir="ltr"><div dir="ltr">On Mon, Nov 20, 2023 at 8:00 AM Wells, David <<a href="mailto:drwells@email.unc.edu">drwells@email.unc.edu</a>> wrote:<br></div><div class="gmail_quote"><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-2527565286816373920">




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Hi everyone,</div>
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I just upgraded to PETSc 3.20 and read up on the new logging infrastructure - its a very nice improvement over the old version.</div>
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I have some code which checks that every construction has a corresponding destruction via</div>
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<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">PetscStageLog  stageLog;</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">ierr = PetscLogGetStageLog(&stageLog);</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">for (int i = 0; i < stageLog->stageInfo->classLog->numClasses; ++i)</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">      {</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">        if (stageLog->stageInfo->classLog->classInfo[i].destructions !=</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">            stageLog->stageInfo->classLog->classInfo[i].creations)</span></div>
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<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">            crash();</span></div>
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<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">      }</span></div>
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<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">This no longer works and I can't figure out how to port it. In particular, it looks
 like I need to get a PetscLogEvent number for creation and another for destruction to retrieve the relevant PetscEventPerfInfo objects per-class - is there some straightforward way to do that for every registered PETSc class?</span></div></div></div></blockquote><div><br></div><div>1. The above code seems to require that creation and destruction occur within the same stage, which might not be true.</div><div><br></div><div>2. <a href="https://petsc.org/main/manualpages/Profiling/PetscLogStateGetNumClasses/">https://petsc.org/main/manualpages/Profiling/PetscLogStateGetNumClasses/</a> gets the numbet of classes. You can recreate this loop with the code from PetscLogHandlerObjectCreate_Default() I think,</div><div>which is in logdefault.c. However, as I said, this will not properly match up across stages.</div><div><br></div><div>3. At logdefault.c:1657 we output all the creations and destructions, so you could copy these loops, but sum across stages.</div><div><br></div><div>4. You could register a callback that just increments and decrements for each classid, and then calls PetscLogHandlerObjectCreate/Destroy_Default(), which might be cleaner.</div><div><br></div><div>  Thanks,</div><div><br></div><div>     Matt</div><div> </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-2527565286816373920"><div dir="ltr">
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">Best,</span></div>
<div><span style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">David Wells</span></div>
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</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.cse.buffalo.edu/~knepley/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>