Questions and Answers : Sixtrack : Not receiving any credit
Message board moderation

To post messages, you must log in.

AuthorMessage
James Adkins

Send message
Joined: 24 Nov 05
Posts: 3
Credit: 121,479
RAC: 0
Message 11495 - Posted: 27 Nov 2005, 19:01:43 UTC
Last modified: 27 Nov 2005, 19:02:54 UTC

Hello,

I am new to the project and have completed 15 work units. On 4 of them there have been enough returned results for credit to be granted, but I show 0.00 credit for each of them. The outcome column reads Success and the clint state column reads Done, so there don't appear to be any errors. My computer is claiming far less credit than the others as well. Does anyone know why this is happening?

I am using BOINC 5.2.8 and sixtrack 4.67 on Windows XP Professional, service pack 2. CPU is AMD Athlon XP 2200+.

Here are the examples, it's computer 77278:

http://lhcathome.cern.ch/workunit.php?wuid=895347

http://lhcathome.cern.ch/workunit.php?wuid=895083

http://lhcathome.cern.ch/workunit.php?wuid=895076

http://lhcathome.cern.ch/workunit.php?wuid=895075


Thanks.


--James

ID: 11495 · Report as offensive     Reply Quote
Gaspode the UnDressed

Send message
Joined: 1 Sep 04
Posts: 506
Credit: 118,619
RAC: 0
Message 11496 - Posted: 27 Nov 2005, 20:26:25 UTC

It looks like the results your computer is returning do not match the results returned by other computer processing the same result. The result may complete successfully, and be valid (i.e. it returns meaningful data), but if it is wrong (i.e. the results are incorrect) no credit is granted.

The most common cause is overclocking, but there are plenty of others. You may have a fault in your CPU's floating point unit. This may not show up elsewhere because it's not often used, but SixTrack uses almost nothing else.

If you're overcloccking try running your PC at design speed and see what happens. Are you running other BOINC projects? Do you have similar problems there? If you do, then maybe one of the many freeware test utilities might shed some light on the fault.


Gaspode the UnDressed
http://www.littlevale.co.uk
ID: 11496 · Report as offensive     Reply Quote
Profile Keck_Komputers

Send message
Joined: 1 Sep 04
Posts: 275
Credit: 2,652,452
RAC: 0
Message 11497 - Posted: 27 Nov 2005, 20:32:00 UTC

All of the results mentioned are flagged invalid. Also several of your pending workunits have enough results returned to validate, but have not.

This tends to indicate there is a possible problem with your computer.
http://boinc-doc.net/boinc-wiki/index.php?title=How-To_Test_Machine_Stability
BOINC WIKI

BOINCing since 2002/12/8
ID: 11497 · Report as offensive     Reply Quote
James Adkins

Send message
Joined: 24 Nov 05
Posts: 3
Credit: 121,479
RAC: 0
Message 11498 - Posted: 27 Nov 2005, 21:30:41 UTC
Last modified: 27 Nov 2005, 21:34:41 UTC

Hello,

Thanks for the quick replies. I don't overclock and I also run both seti@home and einstein@home with no problems (that is, no problems with einstein@home since switching to the beta client).

I ran both SuperPI and Prime95 and got errors almost immediately. They both said there were rounding errors. I pulled the computer out from under the desk and took the side panel off. There are three fans and one of them isn't working. The big one at the back and the one attached the heat sink over the CPU are both working. The one below the CPU fan, or to the left of it when it is lying flat, isn't working. It's about 25% of the area of the CPU fan and much thinner. I'm guessing this is the fan for the floating point unit?

With the side panel off and the computer sitting on the floor with nothing around it, I ran the Prime95 torture test again. It is still running after about 30 minutes. The last time it failed almost immediately.

I am guessing the nonworking fan is the problem. Would you guys agree? Are these very hard to replace?

Thanks for the help.

--James



ID: 11498 · Report as offensive     Reply Quote
Gaspode the UnDressed

Send message
Joined: 1 Sep 04
Posts: 506
Credit: 118,619
RAC: 0
Message 11499 - Posted: 27 Nov 2005, 22:06:38 UTC - in response to Message 11498.  


I am guessing the nonworking fan is the problem. Would you guys agree? Are these very hard to replace?

Thanks for the help.

--James




From what you describe the fan would seem to be the problem. It's worth replacing it and seeing what happens thereafter. Fans of all shapes and sizes are generally available from internet retailers. You might have to Google for a few, but you should be able to replace it without too much hassle. Get a model number from it and plug it into Google - you should have a result in a few seconds!




Gaspode the UnDressed
http://www.littlevale.co.uk
ID: 11499 · Report as offensive     Reply Quote

Questions and Answers : Sixtrack : Not receiving any credit


©2024 CERN