<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><blockquote type="cite" class="">PetscCheckPointer (for a total runtime<br class="">of 21000 s) when running it on four threads. I do not recall using those<br class="">functions actively, especially for PetscStrcmp. </blockquote><div class=""><br class=""></div>PetscCheckPointer() is one of a chain of sanity-check functions called in the preambles to most petsc functions — see PetscValidIntPointer() for example — when PETSc is configured with debugging turned on. You can turn this off even for debugging builds by running with the option:<div class="">-check_pointer_intensity 0<div class=""><br class=""></div><div class="">PetscStrcmp() is similarly used in these preambles to check that two PETSc objects are of the same type (since the type is stored as a string), see PetscObjectTypeCompare(), usually called from PetscValidHeaderSpecific() or PetscCheckTypeNames().<div class=""><br class=""><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Best regards,<br class=""><br class="">Jacob Faibussowitsch<br class="">(Jacob Fai - booss - oh - vitch)<br class="">Cell: (312) 694-3391</div></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Jan 21, 2021, at 07:09, Roland Richter <<a href="mailto:roland.richter@ntnu.no" class="">roland.richter@ntnu.no</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hei,<br class=""><br class="">I noticed while benchmarking and profiling that my program spends ~2800<br class="">s in PetscStrcmp and ~2300 s in PetscCheckPointer (for a total runtime<br class="">of 21000 s) when running it on four threads. I do not recall using those<br class="">functions actively, especially for PetscStrcmp. The first function which<br class="">is doing something useful (i.e. I know where it is in use) is zgemv_,<br class="">with 574 s total runtime. Why are those functions called, and where are<br class="">they necessary?<br class=""><br class="">Thanks!<br class=""><br class="">Regards,<br class=""><br class="">Roland Richter<br class=""><br class=""></div></div></blockquote></div><br class=""></div></div></div></body></html>