<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">MPICH uses PMI 1 by default.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How is your MPICH configured? And how do you run your program, is it via srun?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<div>
<p class="MsoNormal">-- <br>
Hui Zhou<o:p></o:p></p>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">
<b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Mccall, Kurt E. (MSFC-EV41) via discuss <discuss@mpich.org><br>
<b>Date: </b>Friday, January 7, 2022 at 2:21 PM<br>
<b>To: </b>discuss@mpich.org <discuss@mpich.org><br>
<b>Cc: </b>Mccall, Kurt E. (MSFC-EV41) <kurt.e.mccall@nasa.gov><br>
<b>Subject: </b>[mpich-discuss] Slurm and MPI_Comm_spawn<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-left:.5in">My MPICH/Slurm job is failing when the call to MPI_Comm_spawn is made. The Slurm MPI guide
<a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fslurm.schedmd.com%2Fmpi_guide.html%23mpich2&data=04%7C01%7Ckurt.e.mccall%40nasa.gov%7Ce8eee3b5265a434ed5e908d9d219ec6f%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637771831057086290%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=J027PCERirTUMWvkhgqD8LJ%2FjHqGtQvDdpvApqmrlPg%3D&reserved=0">
https://slurm.schedmd.com/mpi_guide.html#mpich2</a> specifically states that MPI_Comm_spawn will work going through Hydra’s PMI 1.1 interface.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">How do I ensure that it goes through that interface?
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Maybe we’ll have to rebuild Slurm to support PMI 1.1. This Slurm command yields the following and PMI 1.1 is not mentioned, although PMI 2 is.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">$ srun –mpi=list<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">srun: MPI types are...<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">srun: cray_shasta<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">srun: pmi2<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">srun: none<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
</div>
</body>
</html>