[QUOTE=geoff;102472]It may be possible to compile with cygwin-gcc 4.1, but I don't have a cross-compiler, it needs to be done from Windows.[/QUOTE]

I have an AMD X2 with Windows, Cygwin and GCC 3.4, and I'm already involved into this project working on P-1 and planning to do sieving work. If it helps I may try and compile with my environment, just let me know.

HHH received my request to join the mailing-list but I got no clue on executables.

Luigi

It is the .zip file in the file section of the yahoo groups. I need to modify it a little bit before final release. Just been lazy, need some incentive....:mally: :curtisc: :xmastree:

[QUOTE=Citrix;102465]I get 62kps with your program on a 2.63 Ghz Intel celeron. What is wrong with the computer?
[/QUOTE]

Is your machine a Northwood or Prescott based Celeron?

For gcwsieve version 1.0.2 on the 4825 term sieve file, at p=150e9:

Compiled with GCC 4.1.2 and run on my 2.88GHz Northwood (128Kb L2) Celeron under Linux I get 89kp/s, but compiled with GCC 3.4.5 on a 2.80GHz Celeron D (256Kb L2) under Windows XP I get 63kp/s.

If I compile with GCC 3.4.6 on Linux I still get 85kp/s on the Northwood Celeron, so I think most of the difference is due to the SSE2 assembler not being well tuned for Prescott, rather than differences between GCC 3.4 and 4.1.

(My P3/800 now gets 72kp/s, 4 times faster per clock than the Celeron D).

40% faster modified multisieve released.
Please update.
File still restricted to the yahoo groups forum.
Version 1.1.
Please provide stats, feedback and any bugs you notice.
Thx


:smile:

I get 310 kp/s with gswsieve 1.0.4 on an AMD 64 3000+.

Carlos

I get 186 kp/s with gswsieve 1.0.4 on an AMD 2200+

Can we bring into line the output formats of the sievers? (If there are no other (technical?)objections). Would be cool. Yours H.

[QUOTE=hhh;103714]Can we bring into line the output formats of the sievers? (If there are no other (technical?)objections). Would be cool. Yours H.[/QUOTE]

the `--multisieve' switch will make gcwsieve write the factors and ABC files in the same format as MultiSieve.

I think everyone should to switch to gcwsieve now. I do not plan to update multisieve anymore (unless there is a use for it), it seems fruitless right now to improve on it.

:smile:

We will reach 2T on sieving by the end of the month. I thought we would take longer to get it.

Carlos

Me too. What is your factor/time ratio now? Do you still get a factor per day? How fast would your computers be in LLR?
In other words: how many times sieving is still more efficient than LLR?

I' make the update this afternoon, I think. Anyways, the speed increase will be less than 5%, I think. H.