mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > NFS@Home

Reply
 
Thread Tools
Old 2021-05-29, 11:17   #1
arakelov
 
Feb 2020

118 Posts
Default Computation error in 16e Lattice Sieve for smaller numbers

Hello all!

First of all, sorry if I'm posting in the wrong place. I'm very new on this world...

I recently joined NFS@Home through the BOINC client. Everything runs fine except for the application named "16e Lattice Sieve for smaller numbers" that shows "Computation error" in the status column (advanced view) lots of times.

I tried to get more info on these errors doing

$ grep -i "boinc" /var/log/syslog | grep -i "error"

but this returns nothing.

Can you give me more information about these kind of errors and how to prevent them? Are they usual?

Thanks a lot and best regards.

Last fiddled with by arakelov on 2021-05-29 at 12:15
arakelov is offline   Reply With Quote
Old 2021-05-29, 12:14   #2
arakelov
 
Feb 2020

32 Posts
Default

Here you can see a sample screenshot:
Attached Thumbnails
Click image for larger version

Name:	computationerror16elatticesievesmallnumbers.png
Views:	60
Size:	147.8 KB
ID:	24981  
arakelov is offline   Reply With Quote
Old 2021-05-29, 16:40   #3
VBCurtis
 
VBCurtis's Avatar
 
"Curtis"
Feb 2005
Riverside, CA

507510 Posts
Default

Welcome! You and your question are in exactly the right place.

I just tried to go the the NFS@home website to try to discover which job is failing, but the site appears to be down. So, perhaps it's a server issue rather than a job error. Whatever the problem is, it's not on your side- something went wrong either in the settings for this specific job that you received workunits for, or in the server itself.

From your side, the best action is to make a report like you made, and wait a couple days before running this particular BOINC client again. We really appreciate work on this client, so thank you!
VBCurtis is offline   Reply With Quote
Old 2021-05-29, 17:45   #4
arakelov
 
Feb 2020

32 Posts
Default

Thanks for your response. So, your recommendation is to stop BOINC and run it again in two days?

You're right, escatter11.fullerton.edu seems down right now... Last time it was accessible, I found this recent thread with a reported bug that seems the same that I'm experiencing: https://escatter11.fullerton.edu/nfs...hp?id=795#2152

Maybe I should post also there?

Thanks for your guidance!
arakelov is offline   Reply With Quote
Old 2021-05-29, 18:34   #5
frmky
 
frmky's Avatar
 
Jul 2003
So Cal

2×3×7×53 Posts
Default

The university is doing a disaster drill today which includes cutting off access to the internet and checking the failover of critical systems. So access today will be sporadic.

The error is caused by the use of an octic polynomial in the latest job. The Windows binaries support these but the Linux binaries don't. This job will pass soon, and the next job will use a smaller order polynomial. I have adding octic support to the Linux binaries on my to-do list.
frmky is offline   Reply With Quote
Old 2021-05-29, 19:03   #6
arakelov
 
Feb 2020

32 Posts
Default

Ok, thanks a lot for the info!
arakelov is offline   Reply With Quote
Old 2021-05-30, 01:03   #7
jyb
 
jyb's Avatar
 
Aug 2005
Seattle, WA

2×34×11 Posts
Default

Quote:
Originally Posted by frmky View Post
The university is doing a disaster drill today which includes cutting off access to the internet and checking the failover of critical systems. So access today will be sporadic.

The error is caused by the use of an octic polynomial in the latest job. The Windows binaries support these but the Linux binaries don't. This job will pass soon, and the next job will use a smaller order polynomial. I have adding octic support to the Linux binaries on my to-do list.
I'm amazed that this hasn't caused noticeable problems before. There have been quite a few jobs with octic polynomials in the last year.
jyb is offline   Reply With Quote
Old 2021-05-31, 20:08   #8
arakelov
 
Feb 2020

32 Posts
Default

It's working again!
Attached Thumbnails
Click image for larger version

Name:	Untitled.png
Views:	58
Size:	69.1 KB
ID:	24992  
arakelov is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
More NFS@Home 16e Lattice Sieve V5 wu's needed pinhodecarlos NFS@Home 46 2018-03-12 22:43
Using 16e on smaller numbers fivemack Factoring 3 2017-09-19 08:52
Advantage of lattice sieve over line sieve binu Factoring 3 2013-04-13 16:32
NFS on smaller numbers? skan YAFU 6 2013-02-26 13:57
Factoring Smaller Numbers marc Factoring 6 2004-10-09 14:17

All times are UTC. The time now is 14:02.


Wed Dec 8 14:02:40 UTC 2021 up 138 days, 8:31, 1 user, load averages: 2.00, 1.57, 1.62

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.