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Old 2008-03-20, 01:07   #34
(loop (#_fork))
fivemack's Avatar
Feb 2006
Cambridge, England

644110 Posts

Originally Posted by WraithX View Post
I saw times as low as 0.344 sec/rel, but at the end of the run, it had climbed back up to 0.37322 sec/rel. Also, I saw the same results whether I ran 1,2, or 3 concurrent instances of the sieve.
Not all special-Q are created equal (that is, not all relations cost the same to obtain; I'm not precisely sure why, I think it has to do with the varying shapes of the lattices corresponding to the particular ideals above each prime), which is why the benchmark runs several special-Q and the timings fluctuate a bit over the course of the run.
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Old 2008-03-26, 00:37   #35
bdodson's Avatar
Jun 2005

210 Posts

Originally Posted by frmky View Post
I finally got the 64-bit asm code to compile in Linux. Here are the benchmarks on a 2.4 GHz Opteron:

64-bit C: 0.41129 sec/rel
32-bit asm: 0.33758 sec/rel
64-bit asm: 0.21451 sec/rel

For those using 64-bit Linux, binaries are available at

Seems to run on linux/xeon quadcores, gnfs-lasieve4I14e gives

total yield: 1096, q=50001037 (0.23540 sec/rel)

cpuinfo says "E5410 @ 2.33GHz", processor 0, 1, ..., 31. Not yet open
to the public. -Bruce
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Old 2008-03-28, 20:06   #36
bsquared's Avatar
Feb 2007

2·1,789 Posts

Courtesy of Greg Childers's 64 bit binary for version 2.4 linux kernel (found here:, I have a new benchmark:

total yield: 1096, q=50001037 (0.17511 sec/rel)

total yield: 2206, q=50001037 (0.24021 sec/rel)

on a 5160 Xeon Woodcrest (3Ghz)
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