<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr">
<p>I am learning how to install and run mpi aplications. My goal is to install mpich and run osu micro benchmark in order to understand how it works.</p>
<p><br>
</p>
<p>so far I got it working but I must be doing wrong because the latency tests does not looks right to me.</p>
<p><br>
</p>
<p></p>
<div><span style="font-family: Consolas, Courier, monospace;">/scratch/e1000/msopena/mpich-installed/bin/mpirun -f /scratch/e1000/msopena/hosts -ppn 8 /scratch/e1000/msopena/osu-micro-benchmarks-5.8/mpi/collective/osu_alltoall</span><br>
<div><br>
<span style="font-family: Consolas, Courier, monospace;"># OSU MPI All-to-All Personalized Exchange Latency Test v5.8</span><br>
<span style="font-family: Consolas, Courier, monospace;"># Size Avg Latency(us)</span><br>
<span style="font-family: Consolas, Courier, monospace;">1 104.87</span><br>
<span style="font-family: Consolas, Courier, monospace;">2 101.44</span><br>
<span style="font-family: Consolas, Courier, monospace;">4 105.47</span><br>
<span style="font-family: Consolas, Courier, monospace;">8 94.35</span><br>
<span style="font-family: Consolas, Courier, monospace;">16 95.14</span><br>
<span style="font-family: Consolas, Courier, monospace;">32 239.45</span><br>
<span style="font-family: Consolas, Courier, monospace;">64 293.59</span><br>
<span style="font-family: Consolas, Courier, monospace;">128 437.93</span><br>
<span style="font-family: Consolas, Courier, monospace;">256 414.21</span><br>
<span style="font-family: Consolas, Courier, monospace;">512 444.74</span><br>
<span style="font-family: Consolas, Courier, monospace;">1024 655.93</span><br>
<span style="font-family: Consolas, Courier, monospace;">2048 529.20</span><br>
<span style="font-family: Consolas, Courier, monospace;">4096 551.84</span><br>
<span style="font-family: Consolas, Courier, monospace;">8192 574.99</span><br>
<span style="font-family: Consolas, Courier, monospace;">16384 644.90</span><br>
<span style="font-family: Consolas, Courier, monospace;">32768 790.70</span><br>
<span style="font-family: Consolas, Courier, monospace;">65536 4169.19</span><br>
<span style="font-family: Consolas, Courier, monospace;">131072 4756.38</span><br>
<span style="font-family: Consolas, Courier, monospace;">262144 6782.57</span><br>
<span style="font-family: Consolas, Courier, monospace;">524288 12299.24</span><br>
<span style="font-family: Consolas, Courier, monospace;">1048576 22880.86</span><br>
</div>
<div><span><br>
</span></div>
<div><span>However, I get notmal results when the osu benchmarks through srun</span></div>
<div><span><br>
</span></div>
<div><span>eg</span></div>
<div><span>
<pre class="c-mrkdwn__pre" data-stringify-type="pre" style="box-sizing: inherit; margin: 4px 0px; padding: 8px; --saf-0:rgba(var(--sk_foreground_low,29,28,29),0.13); font-size: 12px; line-height: 1.50001; font-variant-ligatures: none; white-space: pre-wrap; overflow-wrap: break-word; word-break: normal; tab-size: 4; font-family: Monaco, Menlo, Consolas, "Courier New", monospace !important; border: 1px solid var(--saf-0); border-radius: 4px; background: rgba(var(--sk_foreground_min,29,28,29),0.04); counter-reset: list-0 0 list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; color: rgb(29, 28, 29); font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">$ srun -N3 --cpus-per-task=8 /scratch/e1000/msopena/osu-micro-benchmarks-5.8/mpi/collective/osu_alltoall
# OSU MPI All-to-All Personalized Exchange Latency Test v5.8
# Size Avg Latency(us)
1 27.43
2 27.97
4 29.26
8 30.69
16 31.77
32 34.89
64 42.06
128 60.83
256 115.84
512 205.33
1024 282.61
2048 446.41
4096 733.10
8192 1421.99
16384 2832.45
32768 5631.33
65536 11242.08
131072 22645.46
262144 45544.75
524288 90440.93
1048576 186709.32</pre>
</span></div>
<br>
</div>
<div>Could someone please help me to troubleshoot could be wrong when I use mpich stand alone?
<br>
</div>
<div><br>
</div>
<div>thank you very much<br>
</div>
<p></p>
</div>
</body>
</html>