Error in Computing
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Error in Computing
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Author | Message |
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Send message Joined: 12 Aug 11 Posts: 3 Credit: 6,884 RAC: 0 |
The last several projects have all ended with errors in computing. Tried to change preferences, but am unable to save changes. What's going on? |
Send message Joined: 26 Jun 08 Posts: 644 Credit: 463,733,628 RAC: 91,046 |
You may want to switch to only receive 15e work units for a little while. We are getting closer to finishing up 2,1061-, the largest number we've attempted to date, and we are starting to push the sievers, especially the Windows versions, to their limits. An occasional computational error doesn't surprise me. |
Send message Joined: 12 Aug 11 Posts: 3 Credit: 6,884 RAC: 0 |
I actually just finished up a 15e task, and got no credit at all. I'm going to assume my computer is just not good enough for this project. Sorry. |
Send message Joined: 11 Sep 09 Posts: 3 Credit: 123,354 RAC: 0 |
I'm seeing the same problem. On one machine I'm getting quite a few errors of the same type as the OP. Half a dozen of my other machines seem OK. Error WUs: http://escatter11.fullerton.edu/nfs/result.php?resultid=15948413 http://escatter11.fullerton.edu/nfs/result.php?resultid=15947961 http://escatter11.fullerton.edu/nfs/result.php?resultid=15942169 http://escatter11.fullerton.edu/nfs/result.php?resultid=15942151 I'll go NNT on that one and keep an eye on the others. I don't recall having problems with this project in the past, but I've only just returned after a break for a while :) Al. |
Send message Joined: 29 Dec 11 Posts: 1 Credit: 2,715 RAC: 0 |
I know this is old news but I just have to say something. I just signed in yesterday, 12/29. Downloaded many 16e & 15e workunits. My machine is an AMD FX-6100 6-core with 8 GB memory & a GTX460 video card. I only let BOINC use 5 cores at any one time. So 5 workunits started processing. The 1st 9 W/Us all erred out at between 1:53 & 1:56. So I started nosing around and found that they were consuming 70% of my 8 GB of memory and 100% of CPU time. The absolute highest memory usage I have ever seen. Then I stumbled into the workunit message logs for the failed W/Us on this website and found a message something like "cannot allocate 1199 mb" in each one. So I thought about it for awhile and decided to suspend all but 3 W/Us, letting only 3 process at any given time. This brought my memory usage down into the 55% range. Workunits began to finish successfully. Not all, but more than failed. I now also limit the number of 16e units to 2 simultanously as they seemed to be the memory hogs. So I will try to finish what I have in my cache. But I feel there is more work needed with memory management before this project is ready for prime time. I hope this will help someone else out. Dave |
Send message Joined: 5 Sep 09 Posts: 1 Credit: 466,580 RAC: 0 |
It seems that all the NFS WUs are getting compute errors of 1 and terminating, but as you can see they are not placing and messages in the message log stating what the error is. I found the error by looking at the history file in BoincTasks. This seems to be happening on all te WUs. 15 of the last sixteen sent have errored. One is still in process. History log NFS@Home 1.09 16e Lattice Sieve S2m1061c_371514_0 00:05:14 (00:03:05) 26-01-2012 09:04 PM 26-01-2012 09:06 PM Reported: Computation error (1,) BARBRAS-LAPTOP message log 44477 NFS@Home 26-01-2012 08:39 PM Starting task S2m1061c_371514_0 using lasievef version 109 44495 NFS@Home 26-01-2012 08:44 PM Computation for task S2m1061c_371514_0 finished 44497 NFS@Home 26-01-2012 08:44 PM Started upload of S2m1061c_371514_0_0 44498 NFS@Home 26-01-2012 08:44 PM Finished upload of S2m1061c_371514_0_0 44503 NFS@Home 26-01-2012 08:46 PM Sending scheduler request: To fetch work. 44504 NFS@Home 26-01-2012 08:46 PM Reporting 1 completed tasks, requesting new tasks for CPU |
Send message Joined: 24 Oct 09 Posts: 2 Credit: 1,600,142 RAC: 0 |
I experience lots of trouble with your project since a few months ... first some WUs use lots of memmory 4 of them use 12Gb !!!! note that it is far from 1Gb each ... Now I put an AMD 4000+ on your project it is realy stable ! (used on primegrid with intensive WUs without any error) tested it survey it and conclued that the trouble is not by anyway from this computer ! now look at that :http://escatter11.fullerton.edu/nfs/results.php?hostid=22878&offset=0&show_names=0&state=5&appid= all the 16 lattice units turn to error in around 4 minutes . I aborted some of them to keep the machine working on other units . I thought it would be good to stop working on them but the description of the WU in the option page is not clear enough to make me able to stop those units . hope you'll find a solution excuse my english (I'm french) |
Send message Joined: 26 Jun 08 Posts: 644 Credit: 463,733,628 RAC: 91,046 |
We are finishing up 2,1061- now, which is the largest number we have ever done, and when completed, a record for the largest SNFS factorization ever. I am not surprised that the sieving is straining resources. I would recommend disabling lasievef sieving for a few weeks until we move on to the next number. |
Send message Joined: 24 Oct 09 Posts: 2 Credit: 1,600,142 RAC: 0 |
ok thank you for the answer . I tried some "16e" units on my Q6700 on which I added 4GB and it was able to finish them ... |