got tired of CP locking up my system. boinc fine, seti not causeing problems, just cp. detached.

Yeah... the CPDN client definitely does something that most other DC projects don't and that my CPU doesn't like at all. My system withstood over 10 hours of prime95's torture test with no errors but locked up hard within a couple minutes of starting CPDN. I was able to finish my last model by underclocking my system to 200 MHz below stock speed. I think I might try a model on my other good box and see how it turns out there. Anyone have any clue as to what CPDN is doing that might cause this? Maybe if you take out the function call to crash_cpu()? :)

> Maybe if you take out the function call to crash_cpu()? :)

Toby,

Not sure what's up with some configurations that are having problems. My last nine models have all completed without error, with two more that will finish in the next few days.

The computers I'm running them on are pretty much dedicated to crunching, and only CPDN. They aren't overclocked but running tight memory timings.

I certainly don't have an answer for you.

Sorry, it's just not for every system unfortunately. You have to bear in mind that this is a huge supercomputer codebase that we are trying to run on PCs, so it's not as simple to implement for all system types as other projects.

> Yeah... the CPDN client definitely does something that most other DC projects
> don't and that my CPU doesn't like at all. My system withstood over 10 hours
> of prime95's torture test with no errors but locked up hard within a couple
> minutes of starting CPDN. I was able to finish my last model by underclocking
> my system to 200 MHz below stock speed. I think I might try a model on my
> other good box and see how it turns out there. Anyone have any clue as to
> what CPDN is doing that might cause this? Maybe if you take out the function
> call to crash_cpu()? :)
>

I also noticed my cpu temperature is higher with CPDN than with other boinc
projects.

Regards Hans

>
> I also noticed my cpu temperature is higher with CPDN than with other boinc
> projects.

Yes. CPDN is a very demanding application, and there is advice <a href="http://www.climateprediction.net/board/viewforum.php?f=23">here</a> especially in the hardware maintenance announcement. The power supply and cooling on some machines is simply not up to the job, and dust etc makes things much worse.

I've had it with the computer slowing down and locking up. So I'm going to quit cp. My question is, does the work my computer has already done on its first (and soon to be only) project get lost if I simply quit right now? Or do I have to finish this run (which will be finished in about two weeks). Anyone?

Also, how do you quit? Do you simply quite the cp client and forget about it? Or is there more to it?

&gt;
&gt; &gt;
&gt; &gt; I also noticed my cpu temperature is higher with CPDN than with other
&gt; boinc
&gt; &gt; projects.
&gt;
&gt; Yes. CPDN is a very demanding application, and there is advice <a> href="http://www.climateprediction.net/board/viewforum.php?f=23"&gt;here</a>
&gt; especially in the hardware maintenance announcement. The power supply and
&gt; cooling on some machines is simply not up to the job, and dust etc makes
&gt; things much worse.
&gt;
CPDN really gives the CPU a work out. My 3.4 is liquid cooled so no problem, but the 3.2G HT P-IV and 2.8G HT P-IV use heat sinks. I have had to manually set the fan speeds to max just to keep the CPU at below 51c on the 3.2 and below 49c on the 2.8. Good housekeeping is also essential. I clean everything out about every month or so. I don't bother to overclock because of all the attendant headaches that go along with it.

On the plus side, I haven't had to use the centeral room heating at all so far this year. I just run the fan and let the computers provide all the heat. :-)

&gt; I've had it with the computer slowing down and locking up. So I'm going to
&gt; quit cp. My question is, does the work my computer has already done on its
&gt; first (and soon to be only) project get lost if I simply quit right now? Or do
&gt; I have to finish this run (which will be finished in about two weeks).
&gt; Anyone?

Yes, you have to finish the run for the results to be useful. The intermediate and end of phase trickles return very little data to the server; most of the results are uploaded at the end of the run.

&gt; Also, how do you quit? Do you simply quite the cp client and forget about it?
&gt; Or is there more to it?

At the moment there is no simple way of telling BOINC that you want to stop doing a project at the end of the current WU. It is discussed in <a href="http://climateapps2.oucs.ox.ac.uk/cpdnboinc/forum_thread.php?id=1282">this thread</a>. To detach right click on CPDN in the projects tab, but it takes effect immediately.

I have 5 AMDs ranging from an XP1800 up to an A64 system and all of them except the 1800+ are overclocked with very tight memory timings. I haven't had any of them crash or hang though. I am guessing you have some other problem that CPDN is just making apparent. All of my machines are home made.

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