<head><!-- BaNnErBlUrFlE-HeAdEr-start -->
<style>
#pfptBanner6mxhm43 { all: revert !important; display: block !important;
visibility: visible !important; opacity: 1 !important;
background-color: #D0D8DC !important;
max-width: none !important; max-height: none !important }
.pfptPrimaryButton6mxhm43:hover, .pfptPrimaryButton6mxhm43:focus {
background-color: #b4c1c7 !important; }
.pfptPrimaryButton6mxhm43:active {
background-color: #90a4ae !important; }
</style>
<!-- BaNnErBlUrFlE-HeAdEr-end -->
</head><!-- BaNnErBlUrFlE-BoDy-start -->
<!-- Preheader Text : BEGIN -->
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">
Thanks! I used the second option and it worked just fine. Thanks for the help! Jeff On Tue, Oct 8, 2024 at 11: 32 AM Zhou, Hui <zhouh@ anl. gov> wrote: If you are using hydra – the default launcher installed with MPICH, the “-hosts” option</div>
<!-- Preheader Text : END -->
<!-- Email Banner : BEGIN -->
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">ZjQcmQRYFpfptBannerStart</div>
<!--[if ((ie)|(mso))]>
<table border="0" cellspacing="0" cellpadding="0" width="100%" style="padding: 16px 0px 16px 0px; direction: ltr" ><tr><td>
<table border="0" cellspacing="0" cellpadding="0" style="padding: 0px 10px 5px 6px; width: 100%; border-radius:4px; border-top:4px solid #90a4ae;background-color:#D0D8DC;"><tr><td valign="top">
<table align="left" border="0" cellspacing="0" cellpadding="0" style="padding: 4px 8px 4px 8px">
<tr><td style="color:#000000; font-family: 'Arial', sans-serif; font-weight:bold; font-size:14px; direction: ltr">
This Message Is From an External Sender
</td></tr>
<tr><td style="color:#000000; font-weight:normal; font-family: 'Arial', sans-serif; font-size:12px; direction: ltr">
This message came from outside your organization.
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<![endif]-->
<![if !((ie)|(mso))]>
<div dir="ltr" id="pfptBanner6mxhm43" style="all: revert !important; display:block !important; text-align: left !important; margin:16px 0px 16px 0px !important; padding:8px 16px 8px 16px !important; border-radius: 4px !important; min-width: 200px !important; background-color: #D0D8DC !important; background-color: #D0D8DC; border-top: 4px solid #90a4ae !important; border-top: 4px solid #90a4ae;">
<div id="pfptBanner6mxhm43" style="all: unset !important; float:left !important; display:block !important; margin: 0px 0px 1px 0px !important; max-width: 600px !important;">
<div id="pfptBanner6mxhm43" style="all: unset !important; display:block !important; visibility: visible !important; background-color: #D0D8DC !important; color:#000000 !important; color:#000000; font-family: 'Arial', sans-serif !important; font-family: 'Arial', sans-serif; font-weight:bold !important; font-weight:bold; font-size:14px !important; line-height:18px !important; line-height:18px">
This Message Is From an External Sender
</div>
<div id="pfptBanner6mxhm43" style="all: unset !important; display:block !important; visibility: visible !important; background-color: #D0D8DC !important; color:#000000 !important; color:#000000; font-weight:normal; font-family: 'Arial', sans-serif !important; font-family: 'Arial', sans-serif; font-size:12px !important; line-height:18px !important; line-height:18px; margin-top:2px !important;">
This message came from outside your organization.
</div>
</div>
<div style="clear: both !important; display: block !important; visibility: hidden !important; line-height: 0 !important; font-size: 0.01px !important; height: 0px"> </div>
</div>
<![endif]>
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">ZjQcmQRYFpfptBannerEnd</div>
<!-- Email Banner : END -->
<!-- BaNnErBlUrFlE-BoDy-end -->
<div dir="ltr"><div class="gmail_default" style="font-size:large">Thanks! I used the second option and it worked just fine.</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">Thanks for the help!</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">Jeff</div><div class="gmail_default" style="font-size:large"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 8, 2024 at 11:32 AM Zhou, Hui <<a href="mailto:zhouh@anl.gov">zhouh@anl.gov</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="msg9168486196076054057">
<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="m_9168486196076054057WordSection1">
<p class="MsoNormal"><span style="font-size:11pt">If you are using hydra – the default launcher installed with MPICH, the “-hosts” option accepts a comma separated list, so something like “-hosts node1:4,node2:4,node3:4”. The “:4” tells the launcher to assign
4 processes per host, so you don’t need another “-map-by” option. Alternatively, you could use “-hosts node1,node2,node3 -ppn 4” for the same effect.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<div>
<div>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif">-- <br>
Hui Zhou<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<div id="m_9168486196076054057mail-editor-reference-message-container">
<div>
<div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(181,196,223) currentcolor currentcolor;padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-right:0in;margin-bottom:12pt;margin-left:0.5in">
<b><span style="font-size:12pt;color:black">From: </span></b><span style="font-size:12pt;color:black">Jeffrey Layton via discuss <<a href="mailto:discuss@mpich.org" target="_blank">discuss@mpich.org</a>><br>
<b>Date: </b>Tuesday, October 8, 2024 at 6:50</span><span style="font-size:12pt;font-family:"Arial",sans-serif;color:black"> </span><span style="font-size:12pt;color:black">AM<br>
<b>To: </b><a href="mailto:discuss@mpich.org" target="_blank">discuss@mpich.org</a> <<a href="mailto:discuss@mpich.org" target="_blank">discuss@mpich.org</a>><br>
<b>Cc: </b>Jeffrey Layton <<a href="mailto:laytonjb@gmail.com" target="_blank">laytonjb@gmail.com</a>><br>
<b>Subject: </b>[mpich-discuss] How to use ppr with mpiexec?<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:1pt;color:white">Good morning, I'm trying to "port" an Open MPI script with MPICH and I'm having some trouble. I've got a few questions. What is the form of the
"-hosts" option? Is it something like '-hosts node1:</span><span style="font-size:1pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1pt;color:white">4 node2:</span><span style="font-size:1pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1pt;color:white">4<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:1pt;color:white">ZjQcmQRYFpfptBannerStart<u></u><u></u></span></p>
</div>
<div style="border-width:medium;border-style:none;border-color:rgb(144,164,174) currentcolor currentcolor;display:block;text-align:left;margin:0px;padding:16px;border-radius:4px;min-width:200px;background-color:rgb(208,216,220)" id="m_9168486196076054057pfptBannerwcbbx1f">
<div id="m_9168486196076054057pfptBannerwcbbx1f">
<div id="m_9168486196076054057pfptBannerwcbbx1f">
<p class="MsoNormal" style="margin-left:0.5in;line-height:13.5pt;background:rgb(208,216,220)">
<b><span style="font-size:12pt;font-family:"Arial",sans-serif;color:black">This Message Is From an External Sender
<u></u><u></u></span></b></p>
</div>
<div id="m_9168486196076054057pfptBannerwcbbx1f">
<p class="MsoNormal" style="margin-left:0.5in;line-height:13.5pt;background:rgb(208,216,220)">
<span style="font-size:12pt;font-family:"Arial",sans-serif;color:black">This message came from outside your organization.
<u></u><u></u></span></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in;background:rgb(208,216,220)"><span style="font-size:12pt;color:black"> </span><span style="font-size:12pt"><u></u><u></u></span></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:1pt;color:white">ZjQcmQRYFpfptBannerEnd<u></u><u></u></span></p>
</div>
<div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt">Good morning,<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt">I'm trying to "port" an Open MPI script with MPICH and I'm having some trouble. I've got a few questions.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:1in">
<u></u><span style="font-size:18pt"><span>1.<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span style="font-size:18pt">What is the form of the "-hosts" option? Is it something like '-hosts node1:4 node2:4 node3:4 ...'?<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:1in">
<u></u><span style="font-size:18pt"><span>2.<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span style="font-size:18pt">The Open MPI script has an option "-map-by ppr:4:node" that tells it to run 4 processes per node and then it runs as many nodes as needed to meet the number of processes. How can I do this in MPICH?<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt">Thanks for the help!<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:18pt">Jeff<u></u><u></u></span></p>
</div>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-size:12pt"><u></u> <u></u></span></p>
</div>
</div>
</div>
</div>
</div>
</div></blockquote></div>