Msieve v1.46 feedback

[Jeff Gilchrist]

Originally Posted by em99010pepe

Large problems, what matrices size?
Thank you.

I just did a quick test to make sure my Windows build was compiling properly and it seems it is. For 100 digit small problems, it is only slightly slower:

Windows 64bit
===============
Normal = 2m 37.128s     (memory use: 35.5 MB)
Largeblock = 2m 44.210s (memory use: 47.9 MB)


Linux 64bit
===============
Normal = 6m 18.884s     (memory use: 35.5 MB)
Largeblock = 6m 34.588s (memory use: 47.9 MB)

I will post the binaries soon and you can test it out to see where it seems to make a big difference.

[em99010pepe]

Jeff,

Compiled with LARGEBLOCKS=1?

[Jeff Gilchrist]

Originally Posted by em99010pepe

Compiled with LARGEBLOCKS=1?

Both versions are available for the 64bit build. You can now find that here:
http://gilchrist.ca/jeff/factoring/

[em99010pepe]

Originally Posted by Jeff Gilchrist

Both versions are available for the 64bit build. You can now find that here:
http://gilchrist.ca/jeff/factoring/

Thank you. Will I notice some speed improvements on 7.4 M matrices?

Edit: I will test it. Results within an hour...

[em99010pepe]

How often during LA is the checkpoint written?

[Andi47]

Originally Posted by Jeff Gilchrist

Both versions are available for the 64bit build. You can now find that here:
http://gilchrist.ca/jeff/factoring/

which one is better for "home size" matrices (say 100 to 140 digit factorizations)? LARGEBLOCKS = 1 or =0?

[frmky]

Originally Posted by em99010pepe

How often during LA is the checkpoint written?

Once per hour. The latest version of msieve calculates the number of iterations that will be done each hour, and uses that as the checkpoint interval.

[em99010pepe]

Originally Posted by Andi47

which one is better for "home size" matrices (say 100 to 140 digit factorizations)? LARGEBLOCKS = 1 or =0?

I'm trying SNFS(212) (3.0 M matrix) with LARGEBLOCKS = 1 and LA will take 14 hours. I don't know how slow/fast will go with LARGEBLOCKS = 0.

[em99010pepe]

Originally Posted by frmky

Once per hour. The latest version of msieve calculates the number of iterations that will be done each hour, and uses that as the checkpoint interval.

Thank you. I wanted to test LARGEBLOCKS = 1 with an integer SNFS(229) and I was wondering about the checkpoint.

[em99010pepe]

Originally Posted by em99010pepe

Thank you. I wanted to test LARGEBLOCKS = 1 with an integer SNFS(229) and I was wondering about the checkpoint.

Got a gain of 3 hours on LA on that integer.

[em99010pepe]

Jeff, I am using your msieve version and under windows 7 the client shutdowns automatically every 20 hours or so.

Edit: I'm still using the flags "msieve.exe -i xxx.ini -s xxx.dat -nf xxx.fb -nc2 -nc3 -ncr -v -t 4" on a single quad-core machine while resuming LA.