Computation Error

Stan Wells
Stan Wells
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Topic 194420

The last 10 or so wu have all ended with computation error. It does not look like it even gets really started before it errors out. Problem with client or work units?

Michael Karlinsky
Michael Karlinsky
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Computation Error

Hi Stan,

this might be of interest:

http://einsteinathome.org/node/193761

HTH
Michael

Gundolf Jahn
Gundolf Jahn
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You seem to have upgraded

You seem to have upgraded your linux from 2.6.24-24 to 2.6.28-13. I presume that the hosts 1987730 and 1090818 are the same physical machine.

Perhaps something went wrong with the upgrade (missing libraries)?

Gruß,
Gundolf

Computer sind nicht alles im Leben. (Kleiner Scherz)

Gormzilla
Gormzilla
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RE: The last 10 or so wu

Quote:
The last 10 or so wu have all ended with computation error. It does not look like it even gets really started before it errors out. Problem with client or work units?

Hi Stan,
It's been a while since you posted, but the same is happening here:

'7/9/2009 1:35:43 PM|Einstein@Home|Output file h1_0788.05_S5R4__21_S5R5a_0_0 for task h1_0788.05_S5R4__21_S5R5a_0 absent'

And they DO seem to poop out near the beginning, but one or two of them have exceeded 50% before encountering the dilemma...
My solution: none. I'm giving Einstein a rest. :(

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
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RE: RE: The last 10 or so

Message 93490 in response to message 93489

Quote:
Quote:
The last 10 or so wu have all ended with computation error. It does not look like it even gets really started before it errors out. Problem with client or work units?

Hi Stan,
It's been a while since you posted, but the same is happening here:

'7/9/2009 1:35:43 PM|Einstein@Home|Output file h1_0788.05_S5R4__21_S5R5a_0_0 for task h1_0788.05_S5R4__21_S5R5a_0 absent'

And they DO seem to poop out near the beginning, but one or two of them have exceeded 50% before encountering the dilemma...
My solution: none. I'm giving Einstein a rest. :(

Hi Gormzilla!

The error messages returned to the server seem to indicate that E@H was running out of memory on your PC. Maybe a rogue process was cosuming all available memory, leaving nothing for E@H? A simple re-boot might help.

Quote:


Error[2] 32: function LALHOUGHConstructHMT_W, file /home/bema/einsteinathome/HierarchicalSearch/EaH_build_win32_release_einstein_S5R5_3.04_2/extra_sources/lalapps-CVS/src/pulsar/hough/src2/LocalComputeFstatHoughMap.c, line 621, $Id: LocalComputeFstatHoughMap.c,v 1.22 2008/07/07 09:18:52 reinhard Exp $
ABORT: malloc() failed / Out of memory

CU
Bikeman

Gary Roberts
Gary Roberts
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RE: My solution: none. I'm

Message 93491 in response to message 93489

Quote:
My solution: none. I'm giving Einstein a rest. :(


You do have a fairly easy solution. As Bikeman mentioned, you are running out of memory. That's not surprising since you only have 128MB in your computer. That's really not enough to run Windows properly, let alone some serious crunching at the same time.

Since you have a celeron 1.8MHz you probably need SDRAM (PC100 or PC133) which is pretty much obsolete these days but readily available quite cheaply on places like ebay. Alternatively it may be DDR RAM - an easy way to check is to see if your existing RAM stick has one notch in it or two. If there are two notches, it's definitely SDRAM and not DDR RAM. Once you confirm what type of RAM it is, try to get yourself at least another 256MB or preferably 512MB. It should make quite a difference to the way Windows performs. It will feel a lot more responsive. If you have the motherboard manual for your machine, it will tell you exactly what type and size of RAM modules to use.

Cheers,
Gary.

Richard Haselgrove
Richard Haselgrove
Joined: 10 Dec 05
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For Gormzilla running

For Gormzilla running Windows, it's even easier than that - download and run CPU-Z. That will tell you exactly what memory you're using at the moment, without even taking the lid off the computer, let alone removing the existing memory and counting notches.

Just get more memory with exactly the same specifications. But as Gary says, check the manual if you have it or can download it - there may be limits on the maximum size 'stick' of RAM you can put in any one slot, or instructions about which slot to put your biggest stick in.

But aim to get at least 512MB total into that box somehow. You'll be amazed how much better it runs, and wonder how you ever managed without it. XP SP3 in 128MB must be an absolute dog: upgrading the RAM will be the quickest, easiest, cheapest and most worthwhile upgrade you've ever done.

Gary Roberts
Gary Roberts
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And in preparation for

And in preparation for installing your extra memory, why don't you remove the side of your case and inspect the existing stick and the CPU heatsink and fan (unless you've already been doing this previously as part of a regular preventive maintenance). You should remove the fan (but not the heatsink) and clean the blades with a soft brush to remove dirt. Check that the fan blades are free spinning with no sign of dry bearings. Use a soft brush and a vacuum cleaner to remove the buildup of dirt and fluff from the fins of the heatsink and from around the RAM slots. Use a crevice nozzle to suck out any dirt from the RAM slot before you try to insert a new stick. Don't forget to plug the fan cable back into the three pin header on the motherboard when you reinstall the fan.

If you haven't done a cleanout like this before, it will be well worth the effort. It's amazing how much stuff can build up over time even in a "clean" environment. Overheating of CPUs due to the stress of crunching combined with poor cooling is a common cause of compute errors in projects like E@H.

Cheers,
Gary.

Glenn Fluehr
Glenn Fluehr
Joined: 26 Jul 09
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I am getting the same

I am getting the same problem. It keeps quitting on me saying "COMPULATION ERROR".
My system is a Dell XPS M1330, Intel Core 2 Duo, 8 gig memory, 350gig hd, Vista Ultimate x64 base system OS.

I keep getting this error over and over again and don't know what else to do. I thought it could be memeory or something, but there is 3.7 gigs left over everything else is loaded. I can't seem to get a full proceess out of this project.
I love the screen saver displaying the world, but if it continues I will remove it. Is there another project like this one I could use instead?

Email me at

Thank you,

Glenn Fluehr

Gundolf Jahn
Gundolf Jahn
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RE: I am getting the same

Message 93495 in response to message 93494

Quote:
I am getting the same problem. It keeps quitting on me saying "COMPULATION ERROR"...


Yes, but it's a totally different error. Try entering "can't acquire lockfile" in the search box in the top left corner of this page and read the threads popping up.

Gruß,
Gundolf

Computer sind nicht alles im Leben. (Kleiner Scherz)

jjwhalen
jjwhalen
Joined: 21 Jun 06
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ABP1 Workunit 57514358 ran

ABP1 Workunit 57514358 ran to 100% (23893.08 sec) and failed to validate with error code 2, on a dual core 64bit WinVista machine with plenty (4GB) of memory. No client or host system crashes noted; system not rebooted during 57514358's run. BOINC client is 6.6.28. I've run many S5 and a few ABPS tasks with no problem.

There's 6.6 cpu-hours down the toilet. Oh well.

Best wishes :)

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