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Thread 'CPDN/BOINC on Linux Dual CPU System ?'

Message boards : Number crunching : CPDN/BOINC on Linux Dual CPU System ?
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old_user3434
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Message 4685 - Posted: 26 Sep 2004, 20:57:39 UTC
Last modified: 26 Sep 2004, 21:03:15 UTC

Hmm...

I've setup another System, this time a Dual AthlonMP 2000+ running Linux.

But even with my preferences updated to allow BOINC to take 2GB of Disk Space, it downloaded only one CPDN WorkUnit.

Top shows the CPU Utilization at 100% only for one CPU, the other remains idle (?)

Is BOINC V4.09 possibly unable to utilize the 2nd CPU (despite the Preference setting set to "On multiprocessors, use at most: 2 Processors" ) ??

IMHO, it should have detected the 2nd, idle CPU, and downloaded a 2nd Workunit, and run 2 Models parallel.

-- update --
The Box just got SETI up and running on the Idle CPU, so it seems BOINC prefers to share CPU's among different projects, rather than having 2 CPU's running one and the same one (?)
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<p>Scientific Network : <a href="http://www.falconfly.de/network.htm">36200 MHz «» 8204 MB «» 815.0 GB</a> </p>
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Pete(r) van der Spoel

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Message 4805 - Posted: 29 Sep 2004, 14:38:01 UTC - in response to Message 4685.  

&gt; IMHO, it should have detected the 2nd, idle CPU, and downloaded a 2nd
&gt; Workunit, and run 2 Models parallel.

Yes it should.

&gt; -- update --
&gt; The Box just got SETI up and running on the Idle CPU, so it seems BOINC
&gt; prefers to share CPU's among different projects, rather than having 2 CPU's
&gt; running one and the same one (?)

No it shouldn't ;-)

I have a dual MP running Windows XP with boinc 4.05 and boinc detects both CPUs and downloads two workunits. Did you originally have 1 CPU or are they modded XPs? Have you tried updating climateprediction.net on the project tab?

I think your problem probably has something to do with the disk capacity preferences, seeing as a SETI workunit is a lot smaller than a climateprediction one.

Funnily I have exactly the opposite problem. I have both SETI and climatepredition workunits downloaded (only a single CPU Windows XP PC) with both set to 50%, but the SETI project never gets any CPU time...

Pete
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Message 4815 - Posted: 29 Sep 2004, 17:31:47 UTC

Hi FalconFly,

nice to meet you here ;-)

With BOINC 4.05 their was a known "bug", that the resourceShare for CPDN had to be higher than 50%. Only then the CPDN-WU for the second Prozessor had been downloaded.

It was discussed <a href="http://climateapps2.oucs.ox.ac.uk/cpdnboinc/forum_thread.php?id=191#1043">here</a>

Hope this helps, Greetings


<a href="http://www.boinc.dk/index.php?page=user_statistics&amp;project=cpdn&amp;userid=34"><img border="0" height="080" src="http://34.cpdn.sig.boinc.dk?188"></a>

Supporting <b>BOINC</b>, because it is really a <b>great concept !</b>
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Message 4860 - Posted: 30 Sep 2004, 18:06:08 UTC - in response to Message 4815.  
Last modified: 30 Sep 2004, 18:06:26 UTC

Hi Yeti :)

Well, due to me attaching multiple Projects, the 2nd CPU is utilized normally now and works flawless.

I reckoned my global setting of "Keep enough work / Contact Server every 1 day" might have resulted in it downloading only one Model initially.
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<p>Scientific Network : <a href="http://www.falconfly.de/network.htm">36200 MHz «» 8204 MB «» 815.0 GB</a> </p>
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Message boards : Number crunching : CPDN/BOINC on Linux Dual CPU System ?

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