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<TITLE>Re: [Equest-users] Multithreading</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I’m currently in an eQuest training class and the instructor said the next version will not make use of multithreading. He said eQuest is probably about a year away from that capability.<BR>
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On 5/19/11 2:05 PM, "Brian Tysoe" <<a href="BTysoe@mcw.com">BTysoe@mcw.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hello equest-users,<BR>
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Does anyone out there know if the next release of eQuest (based on a new version of DOE 2 I believe) will be able to make use of processor multithreading?<BR>
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We are running into problems modelling large buildings with eQuest 3.64. Files are taking upwards of 5 minutes to open and once they are open it takes about 8 seconds to modify any single field. If you want to change the flow rate of an AHU you enter your number and then wait for 8 seconds while the software thinks about it.<BR>
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We have done some monitoring and found that the software is running on one processor core at 100% and that is the bottleneck.<BR>
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Exhibit A: Loading the model<BR>
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<IMG src="cid:3388662979_30749347" ><BR>
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In this graph (taken while loading the model) you can see that eQUEST’s CPU usage is constant. It is only using one of the available CPU cores and it is using that core to the max. Compare this to the Disk usage and you can see that the Disk usage spikes up several times but those spikes are relatively low.<BR>
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Exhibit B: Changing values<BR>
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<IMG src="cid:3388662979_30735035" ><BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>In this graph you can see the CPU usage spike up when I made a change in eQUEST and then dip down several seconds after. The Disk usage is still sporadic and low.<BR>
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We have concluded that adding RAM will not speed things up. The best solution is a faster processor.<BR>
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Has anyone else done any similar benchmarking and want to share their findings?<BR>
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Thanks,<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'> <BR>
<FONT COLOR="#4D4D4D"><B>Brian Tysoe </B></FONT></SPAN></FONT></FONT><FONT FACE="Arial"><FONT COLOR="#4D4D4D"><FONT SIZE="1"><SPAN STYLE='font-size:8pt'>M.A.Sc., P.Eng., LEED AP <BR>
</SPAN><SPAN STYLE='font-size:9pt'><I>Mechanical Engineer <BR>
</I></SPAN></FONT></FONT><FONT SIZE="2"><SPAN STYLE='font-size:10pt'> <BR>
<FONT COLOR="#008000"><B><I>MCW Consultants Ltd. </I></B></FONT> <<a href="http://www.mcw.com">http://www.mcw.com</a>> <BR>
<FONT COLOR="#4D4D4D"><I>600-156 Front Street West <BR>
Toronto, ON M5J 2L6 <BR>
Phone 416-598-2920 <BR>
Fax 416-598-5394 <BR>
</I></FONT> <BR>
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