Sieve Discussion - Page 4

ET_ · 2007-03-30, 17:53

Quote:

Originally Posted by geoff

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.

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

Citrix · 2007-03-31, 01:35

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....

geoff · 2007-04-01, 03:35

Quote:

Originally Posted by Citrix

I get 62kps with your program on a 2.63 Ghz Intel celeron. What is wrong with the computer?

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).

Citrix · 2007-04-05, 01:18

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

em99010pepe · 2007-04-08, 14:05

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

Carlos

em99010pepe · 2007-04-09, 20:44

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

hhh · 2007-04-14, 21:33

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

geoff · 2007-04-16, 01:27

Quote:

Originally Posted by hhh

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

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

Citrix · 2007-04-19, 22:06

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.

em99010pepe · 2007-04-21, 08:34

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

Carlos

hhh · 2007-04-21, 09:17

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.

2007-03-31, 01:35	#35
Citrix Jun 2003 2×11×73 Posts	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.... Last fiddled with by Citrix on 2007-03-31 at 01:36

2007-04-19, 22:06	#42
Citrix Jun 2003 2·11·73 Posts	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. Last fiddled with by Citrix on 2007-04-19 at 22:07

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2007-04-05, 01:18	#37
Citrix Jun 2003 2·11·73 Posts	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

2007-04-08, 14:05	#38
em99010pepe Sep 2004 2×5×283 Posts	I get 310 kp/s with gswsieve 1.0.4 on an AMD 64 3000+. Carlos

2007-04-09, 20:44	#39
em99010pepe Sep 2004 B0E₁₆ Posts	I get 186 kp/s with gswsieve 1.0.4 on an AMD 2200+

2007-04-14, 21:33	#40
hhh Jun 2005 373 Posts	Can we bring into line the output formats of the sievers? (If there are no other (technical?)objections). Would be cool. Yours H.

2007-04-21, 08:34	#43
em99010pepe Sep 2004 2×5×283 Posts	We will reach 2T on sieving by the end of the month. I thought we would take longer to get it. Carlos

2007-04-21, 09:17	#44
hhh Jun 2005 175₁₆ Posts	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.