<div dir="ltr">See the wiki <a href="http://wiki.mpich.org/mpich/index.php/Tool_interfaces_(MPI-T),_MPICH_parameters_and_instrumentation#New_MPI_T_Control_Variable_Design">here</a>  for how to add a cvar in MPICH.<div>See MPI 3.0 Chapter 14.3.6 for how to access cvars in MPI.</div>
</div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">--Junchao Zhang</div></div>
<br><br><div class="gmail_quote">On Sat, Feb 22, 2014 at 7:56 AM, William Gropp <span dir="ltr"><<a href="mailto:wgropp@illinois.edu" target="_blank">wgropp@illinois.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">Yes, CVAR already reads env variables, and PETSc could use the MPI_T interface to set the value at any time.<div><br></div><div>Bill</div><div><div class=""><br><div>
<span style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><div style="word-wrap:break-word">
<div><div style="font-size:12px">William Gropp</div><div style="font-size:12px">Director, Parallel Computing Institute</div><div style="font-size:12px">Deputy Director for Research</div><div style="font-size:12px">Institute for Advanced Computing Applications and Technologies</div>
</div></div></span><span style="font-size:12px">Thomas M. Siebel Chair in Computer Science</span><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><div style="word-wrap:break-word">
<div><div style="font-size:12px">University of Illinois Urbana-Champaign</div></div><div><br></div></div></span><br></span><br>
</div>
<br></div><div class=""><div><div>On Feb 22, 2014, at 5:41 AM, Jeff Hammond wrote:</div><br><blockquote type="cite"><span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium">I'll look into a general setenv-like mechanism for CVARs rather than an abort-specific one-off. Might be there already through MPI_T interface (which is standard, unlike MPIX).<br>
<br>Jeff<br></span></blockquote></div><br></div></div></div><br>_______________________________________________<br>
discuss mailing list     <a href="mailto:discuss@mpich.org">discuss@mpich.org</a><br>
To manage subscription options or unsubscribe:<br>
<a href="https://lists.mpich.org/mailman/listinfo/discuss" target="_blank">https://lists.mpich.org/mailman/listinfo/discuss</a><br></blockquote></div><br></div>