Discussion related to cado-nfs

[Zimmermann Paul <Paul.Zimmermann@inria.fr>]

       Dear Meng,

> Date: Fri, 26 Jul 2013 22:26:53 +0800 (CST)
> From: meng  <qsmeng@126.com>
> 
> Dear Paul,
> >Please can you send us the rsa100.poly file you used, and the las command 
> >that
> >fails, so that we can try to reproduce the problem?
> the rsa100.poly is attached. and the las command is given below:
> /home/greatnet/meng/cado-nfs/build/master/sieve/las -I 11 -rpowlim 2047 
> -apowlim 2047 -poly /tmp/c100.poly -fb /tmp/c100.roots -q0 2040000 -q1 
> 2060000 -mt 2 -out /tmp/c100.rels.2040000-2060000.gz
> the gdb result is given below :
> #0  0x00000039f5a7a050 in memset () from /lib64/libc.so.6
> #1  0x0000000000413c0b in init_rat_norms_bucket_region (S=0x6a0000 "", 
> j=<value optimized out>, si=<value optimized out>)
>     at /home/greatnet/meng/cado-nfs/sieve/las-norms.c:332
> #2  0x000000000040980e in process_bucket_region (th=0x65fac0) at 
> /home/greatnet/meng/cado-nfs/sieve/las.c:2858
> #3  0x00000039f660683d in start_thread () from /lib64/libpthread.so.0
> #4  0x00000039f5ad4fad in clone () from /lib64/libc.so.6
> The version is 8efeb35.
> 
> thank you.
> Regards,
> meng

I do not get a segmentation fault. With revision d7da39a, after:

$ makefb -I 11 -poly c100.poly -alim 2000000 > c100.roots

and:

$ las -I 11 -rpowlim 2047 -apowlim 2047 -poly /tmp/c100.poly -fb 
/tmp/c100.roots -q0 2040000 -q1 2060000 -mt 2 -out 
/tmp/c100.rels.2040000-2060000.gz -rlim 1000000 -alim 2000000 -lpbr 25 -lpba 
25 -mfbr 50 -mfba 50 -rlambda 2.1 -alambda 2.2

I get:

$ zcat /tmp/c100.rels.2040000-2060000.gz | tail                            
-187415329,9696:20fb,1937b,5,a3,b3,152bfd,6e2d5d:2,2,2,2,2,2,2e0d,239d7,859,1948f,3,17,115,1c1,1de88e1,1f6ecb
-224662937,9374:b03,8d29,5655d,17,14b,1d3,92d8bf:2,2,2,2,26dd,1003ff,13,df,2e3,40f,25ba6d,4abbcd,1f6ecb
-248309429,12633:2,2,2,2dc73,463,17,2bd,735545,7b707f:5d3d,d11f7,129d7b,3,7,1d,97,28d,5b3,855199,1f6ecb
-110328703,15994:e5d,1127,5afd,623,13,2b,175,b213b9:2,2,2,2,2,18bafd,ec0b,9b2f7,7,29,6c2969,6fc1e5,1f6ecb
-105414754,13739:5c47,8cb,3,17,53,67,3513bb,fc6f79:2,2,85d,4db69,253d,39fb,18926b,7,11,13,b62fed,1f6ecb
# 37 relation(s) for algebraic (2059979,90086)
# Time for this special-q: 0.1240s [norm 0.0000+0.0000, sieving 0.0520 
(0.0560 + 0.0080 + -0.0120), factor 0.0720]
# Average J=1009 for 1376 special-q's, max bucket fill 0.733464
# Total wct time 185.4s [precise timings available only for mono-thread]
# Total 72236 reports [0.00257s/r, 52.5r/sq]

Thus I fear you have to isolate the problem by yourself.

First please checkout revision d7da39a (or later), recompile the "las" binary
(maybe after removing the old one to be sure), and try again.

Paul

PS: you should have:
$ md5sum c100.roots                                                        
14f3c1e6f977230929e17c33ce04340a  c100.roots