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thanks a lot !!! <br><br>I launch mpd --ncpus=2<br>then<br><br>mpdboot -n 20 -f /home/mpd.hosts<br><br>My MPI cluster has 33 nosts.<br>But only 20 hosts can be used, each host has 2 CPUs. <br><br>Thus, I can not use more than 40 processes in parallel.<br><br>In this way , May I claim that I can use 40 processes in parallel ?<br><br>(1)<br>I run the program in this way : <br><br>time mpiexec -l -n 40 blis -par /home/chipps_blis_svn_trunk_090423/blis_trunk/blis.par -Alps_instance <br><br>bienst1.mps > bienst1_np_40_out_1<br><br>For bienst1.mps, <br><br>In Blis0.9 (Intel(R) Xeon(TM) CPU 3.06GHz, cache 512 KB), I got "Search wallclock = 275.889 seconds".<br> <br>In CPLEX (Intel(R) Xeon(TM) CPU 2.40GHz, cache 512 KB) , I got Solution time 535.42 sec. <br><br>How to check the CPUs usage to know how many processors are used ? <br><br>(2)<br>And, <br>Search CPU time = 12.6601 seconds, max = 265.293, min = 12.6591,<br><br>Search wallclock = 275.889 seconds, max = 275.852, min = 275.838<br><br>Here, the "min " of CPU time is much smaller than the "max" time, <br>does it mean that some CPUs are idel ? their work load are not balanced ?<br><br>(3)<br>How to check CPU time of each host ? <br><br>I will get a machine with 400 nodes, each of which has 2 Quad cores.<br><br>May I expect I can get more than 100 ave. speedup from it ?<br><br>(4) what is the difference between local machine and local host ?<br>In my mpd.host file , I listed 20 hosts, each of them has 2 CPUs. <br><br><br>Any help is appreciated. <br><br>April 24 2009<br><br><hr id="stopSpelling">From: Yan.Xu@sas.com<br>To: dtustudy68@hotmail.com; chipps@list.coin-or.org<br>Date: Fri, 24 Apr 2009 14:47:16 -0400<br>Subject: RE: Blis install error<br><br>
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<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">For some instances, you might not observe speedup, it depends
the properties of the instances, machined used and algorithm implementation.
Blis is not suitable for 2-processor-run because the Master doesn’t
processing nodes. It is designed for massive parallel computing (several dozen
~ thousands processors). You need find the right machine to do the test.</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">You can check the CPUs usage to know how many processors are
used.</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">What’s the specification of your machine?</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Yan</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<div>
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<p class="EC_MsoNormal"><b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">From:</span></b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"> Jack Bryan
[mailto:dtustudy68@hotmail.com] <br>
<b>Sent:</b> Thursday, April 23, 2009 11:37 PM<br>
<b>To:</b> Yan Xu; chipps@list.coin-or.org<br>
<b>Subject:</b> RE: Blis install error</span></p>
</div>
</div>
<p class="EC_MsoNormal"> </p>
<p class="EC_MsoNormal" style="margin-bottom: 12pt;"><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"><br>
I have run some milp models in Blis 0.9, but I found that the more processes I
use, <br>
<br>
the longer run-time.<br>
<br>
I run in this way:<br>
<br>
mpiexec -1 -l -n 10 blis p0033.mps<br>
<br>
Blis time
Blis time Blis time<br>
cplex time 2
processes 6 processes 10 processes<br>
p0033 0.04 sec
0.094985 0.280955
0.953854<br>
<br>
Blis time Blis time
Blis time<br>
cplex time 2
processes 10 processes 20 processes<br>
bell5 0.85 sec
46.022
90
111<br>
<br>
<br>
Did I do something wrong ? <br>
<br>
How to make sure that I really use the number of processes that are indicated <br>
in the command line ? <br>
<br>
Only by </span><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: red;">Alps0050I Launched number of processes ? </span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"><br>
<br>
How to guarantee that the application program is really run in parallel on <br>
different processors not on one processor ? <br>
<br>
Any help is appreciated. <br>
<br>
thanks<br>
April 23 2009 </span></p>
<div class="EC_MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';">
<hr id="EC_stopSpelling" size="2" width="100%" align="center">
</span></div>
<p class="EC_MsoNormal" style="margin-bottom: 12pt;"><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';">From: Yan.Xu@sas.com<br>
To: dtustudy68@hotmail.com; chipps@list.coin-or.org<br>
Date: Thu, 23 Apr 2009 15:02:18 -0400<br>
Subject: RE: Blis install error</span></p>
<div>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">In log, you can find</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Reading in ALPS parameters ...</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Reading in BLIS parameters ...</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Alps0110I ALPS version 1.0 (Parallel, MPI)</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: red;">Alps0050I Launched 2 processes</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Alps0030I Data file: p0033.mps</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Regards,</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Yan</span><span style="font-size: 10pt; font-family: 'Verdana','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p></div></div><br /><hr />Rediscover Hotmail®: Now available on your iPhone or BlackBerry <a href='http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Mobile2_042009' target='_new'>Check it out.</a></body>
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