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Number crunching :
Not finishing phase 1
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Send message Joined: 25 Aug 04 Posts: 41 Credit: 34,555 RAC: 0 |
http://climateapps2.oucs.ox.ac.uk/cpdnboinc/trickle.php?hostid=24450 my laptop doesn't mamage to get through phase 1 of any model. The most it got is a 54010 trickle. What can I do about it? <br>***********************************<br> WinXP Home, P4 3.2GHz HT, 512Mb RAM. Running SETI, CPDN, Predictor, LHC, Einstein, Orbit, Lattice and Folding |
Send message Joined: 7 Aug 04 Posts: 2185 Credit: 64,822,615 RAC: 5,275 |
> http://climateapps2.oucs.ox.ac.uk/cpdnboinc/trickle.php?hostid=24450 > > my laptop doesn't mamage to get through phase 1 of any model. The most it got > is a 54010 trickle. What can I do about it? > Some laptops can overheat pretty easily. Overheating can cause model instability. Tilting up the back edge to allow more airflow, or buying a laptop cooler can help, as talked about in this thread. http://www.climateprediction.net/board/viewtopic.php?t=1954 Looking at that PC, it also appears that it only has 128 MB of memory. Running Windows 2000 and the model probably uses all the memory easily, and then has to work a lot with a swap file. More memory would no doubt help. |
Send message Joined: 10 Oct 04 Posts: 223 Credit: 4,664 RAC: 0 |
If you've sorted out the points Geophi mentions, you should then look at the numerous postings on the other Boinc message board about lost models. __________________________________________________ |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
With less than the minimum recommended memory, data will keep getting cached onto the hard disk. Very frequently! This will lead to more wear than is good for it. The normal data store interval is 60 seconds, which is a compromise between excessive wear, and possible data loss. And you are using the disk for caching as well. Software these days is memory hungry, so if at all possible, add some more. First though, find out how fast what you have is. It may be better still to replace what you already have, (and add more), with faster ram. Faster ram gives the cpu quicker access to the data, which will mean faster processing of your models. Les |
Send message Joined: 25 Aug 04 Posts: 41 Credit: 34,555 RAC: 0 |
Actually, it's a Pentium III 900MHz laptop (a Dell Inspiron 8000 I bought in 2001) sitting there doing nothing but CPDN, SETI (and LHC) work most of the day (I turn it off at night). I am a bit short of cash right now, so I don't know if and when I'll be able to get more RAM for it. Will increasing the disk space allotted for BOINC help or not? Paging file is currently 125Mb. Thanks for helping... <br>***********************************<br> WinXP Home, P4 3.2GHz HT, 512Mb RAM. Running SETI, CPDN, Predictor, LHC, Einstein, Orbit, Lattice and Folding |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
I'm not an expert, but I don't think extra BOINC space will help. Are you running the GUI version? If so, look at 'Disk'. This will show you if there is enough space for the 'permanent' data. The problem is more likely 'temporary' data storage. (More fingers on which to count.) So what's needed is a larger cache and/or page file (not sure if these are the same thing. The name seems to change with the operating system.) And the problem may be elsewhere. But one thing at a time. Another thought: Do you run the machine continuously? It may not be running for long enough periods. And have you tried Geophi's suggestion to lift the machine above the support surface? Les |
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