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Tooooo low negative LTD! What \'s next?

Tooooo low negative LTD! What \'s next?

Message boards : Number crunching : Tooooo low negative LTD! What \'s next?
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Profile Nikolay A. Saharov

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Message 24250 - Posted: 9 Sep 2006, 21:19:20 UTC
Last modified: 9 Sep 2006, 21:27:27 UTC

I just finished a Sulphur WU and have too low negative LTD for CPDN project. It\'s value is -1389707 !!! It was preempted regularly with other projects so I think it shouldn\'t to be so low!

Really I shall receive the new task only in half a year or later? And whether I should reset LTD value manually?

I have BOINC 5.6.3 and 16 projects on one host.
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Les Bayliss
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Message 24252 - Posted: 9 Sep 2006, 21:30:21 UTC

Leave it for while. The climate models are a long, strenuous run for BOINC, and it needs time \"to get it\'s breath back\".
Or, if you like, all of your other projects are now owned time to compensate.
In a week or two, BOINC will consider getting another climate model. And the new ones are a lot longer than the older models.

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Profile Nikolay A. Saharov

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Message 24254 - Posted: 9 Sep 2006, 21:42:21 UTC - in response to Message 24252.  

I disagree because this result was not overcomitted and CPDN should not accumulate so huge value. And this was happened with all previous results I finished and with all previous BOINC versions I used. Every time I reset LTD for CPDN to download a new task. And I think there is a bug with cpu scheduler when it calculates LTD for CPDN.
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Message 24256 - Posted: 10 Sep 2006, 0:56:16 UTC

This is a known issue on Hyperthreaded CPUs. I am unsure what needs to be fixed, but my HT machines thinks there is no CPDN work, but the debt changes, and time changes, etc. I do not know if it\'s a BOINC or CPDN issue.

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Alex Plantema

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Message 24261 - Posted: 10 Sep 2006, 9:38:26 UTC
Last modified: 10 Sep 2006, 9:37:49 UTC

I run climateprediction on a HT computer too. I want it to run on one processor, and use the other processor for the other projects. Sometimes it\'s interrupted when another project causes overcommission. So I gave it a bit less than 50%, about 45%, of the resources, and that works fine.

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Profile Nikolay A. Saharov

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Message 24264 - Posted: 10 Sep 2006, 10:57:52 UTC

Maybe John McLeod VII can answer more exactly where is the problem? ;-)
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Message boards : Number crunching : Tooooo low negative LTD! What \'s next?

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