mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > Msieve

Reply
 
Thread Tools
Old 2013-10-11, 21:19   #1
wombatman
I moo ablest echo power!
 
wombatman's Avatar
 
May 2013

1,741 Posts
Default Post-Processing Fails at Cycle Optimization

Code:
Fri Oct 11 16:15:26 2013  weight of 4401231 cycles is about 308463782 (70.09/cycle)
Fri Oct 11 16:15:26 2013  distribution of cycle lengths:
Fri Oct 11 16:15:26 2013  1 relations: 707738
Fri Oct 11 16:15:26 2013  2 relations: 587582
Fri Oct 11 16:15:26 2013  3 relations: 515398
Fri Oct 11 16:15:26 2013  4 relations: 434760
Fri Oct 11 16:15:26 2013  5 relations: 371133
Fri Oct 11 16:15:26 2013  6 relations: 309905
Fri Oct 11 16:15:26 2013  7 relations: 263835
Fri Oct 11 16:15:26 2013  8 relations: 222328
Fri Oct 11 16:15:26 2013  9 relations: 185425
Fri Oct 11 16:15:26 2013  10+ relations: 803127
Fri Oct 11 16:15:26 2013  heaviest cycle: 28 relations
Fri Oct 11 16:15:27 2013  commencing cycle optimization
failed to reallocate 163840000 bytes
Return value 0. Terminating...
Looking around for this error suggested that memory might be the case, but I watched the memory used and there was still nearly 4GB of RAM free. There are also a few hundred GB of disk space, so it's not that either.

This is using MSieve 1.52 SVN945 on Windows 7 64-bit. Any ideas?

Edit: The number is the cofactor of 11^238+5^238 (C149, SNFS difficulty = 213). I've done a C142 myself, so unless I was right at the edge of something, I don't know why this would fail.
Edit 2: Using the 1.51 official version from Jeff Gilchrist's site (the 64 bit i7/i5 one) works.

Last fiddled with by wombatman on 2013-10-11 at 22:01
wombatman is offline   Reply With Quote
Old 2013-10-12, 02:01   #2
jasonp
Tribal Bullet
 
jasonp's Avatar
 
Oct 2004

22·883 Posts
Default

No idea why v1.52 wouldn't work; the changes in the latest SVN should have nothing to do with the filtering. I wonder if your current binary has some kind of 32-bit limit even if your system does not...
jasonp is offline   Reply With Quote
Old 2013-10-12, 03:00   #3
wombatman
I moo ablest echo power!
 
wombatman's Avatar
 
May 2013

1,741 Posts
Default

Yeah, it's a 32-bit file. However, I tried the 64-bit versions from Jeff's page (SVN 942 and SVN 939). Both of them throw errors on the actual linear algebra:

Code:
lanczos error: submatrix is not invertiblemensions (0.0%, ETA 14h39m)

lanczos halted after 5 iterations (dim = 250)
linear algebra failed; retrying...
I'm going to try rebuilding a 64-bit version from the latest SVN.

Edit: And now I'm reminded why I didn't have a 64-bit version yet...errors at the literal last step of compiling about not being able to find correct calls to a couple of GMP-based functions. In the meantime, using the 1.51 version that works.

Last fiddled with by wombatman on 2013-10-12 at 03:25
wombatman is offline   Reply With Quote
Old 2013-10-12, 04:51   #4
wombatman
I moo ablest echo power!
 
wombatman's Avatar
 
May 2013

1,741 Posts
Default

Well, some fiddling around and not including ECM=1 in the build, and I have a successfully working V1.52 SVN945 64-bit version of Msieve. I guess I screwed up the previous build. It's lovely to watch the expected completion time drop from 34 hours to 13.5 hours.

Now to try and get a version with ECM built into it...
wombatman is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
16e Post Processing Progress pinhodecarlos NFS@Home 8 2018-11-28 13:45
NFS@Home Post-Processing Rack Build pinhodecarlos NFS@Home 1 2016-09-27 12:34
Crash doing large post-processing job wombatman Msieve 22 2013-12-04 01:37
Update on 7^254+1 post processing dleclair NFSNET Discussion 4 2005-04-05 09:51
Post processing for 2,757- xilman NFSNET Discussion 3 2003-11-06 14:23

All times are UTC. The time now is 01:15.

Sun Dec 6 01:15:23 UTC 2020 up 2 days, 21:26, 0 users, load averages: 3.57, 3.25, 2.74

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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.