Re: Alpha=3.2 looks good.
Quote:
Originally posted by paul.jobling
Hi guys,
I'll take 155 billion to 175 billion. That should take this XP 2100+ about 20 days, with alpha set to 3.2.
NOTE Using the default value of alpha (0.5) is not recommended - my rate was ~7000 p/sec at that; with alpha set to 3.2 the rate is ~11200 p/sec.
Regards,
Paul.
Can anyone else supply p rates for various machines.
I've just tried the following on a Duron 900 using WiNE on Linux, with alpha=3:
p=4.500-4.501G 2500p/s
p=50.000-50.001G 2300p/s
This looks too slow by a factor of 2 or so.
Is anyone else using WiNE on Linux, or using a Duron of similar speed?
Phil
Re: Re: Alpha=3.2 looks good.
Quote:
Originally posted by FatPhil
Can anyone else supply p rates for various machines.
I've just tried the following on a Duron 900 using WiNE on Linux, with alpha=3:
p=4.500-4.501G 2500p/s
p=50.000-50.001G 2300p/s
This looks too slow by a factor of 2 or so.
Is anyone else using WiNE on Linux, or using a Duron of similar speed?
Yes, that definitely sounds too slow. My Athon XP 1800+ (1.533 GHz) clocks in at 11855p/s at p=251G and alpha=3.
Greg
Re: Re: Re: Alpha=3.2 looks good.
Quote:
Originally posted by frmky
Yes, that definitely sounds too slow. My Athon XP 1800+ (1.533 GHz) clocks in at 11855p/s at p=251G and alpha=3.
Greg
OK, perhaps Paul's program is I/O bound, and that the XPs have larger and/or faster caches than the Durons, and that I'm getting completely constipated.
I just tried on a Duron1300 running NT, and it wasn't much faster. :-( .
I've written my own sieve, you see, and I'm trying to compare speeds. On my machines, my own sieve is ~4 times faster than Paul's. However, it appears that Paul's is running at about 1/3rd speed on my machines compared with how it should run (weird, I've not had problems with NewPGen in the past).
I'll be giving windows (DOS box) and Linux binaries to Louie later this afternoon, and it would be nice if a couple of people could do a speed comparison.
If there are people out there with workstations (non-x86) then I can probably build binaries for those as well, as it's all C, no assembly language.
Ooh - final test complete, everything works (4.2* faster) - I'll ship it to Louie right now!
Phil
NbeGon for Sparc/Alpha/BSD
I've had a productive morning building NbeGon for the some new OSes and Architectures. Currently available are the following:
Linux/x86
Windows/x86
FreeBSD/x86
OpenBSD/x86
SunOS/Sparc
Linux/Alpha
http://fatphil.org/maths/sierpinski/
I've only tested the new non-86 non-Linux ones on the old 150-150.01G range that I tested others with, and it comes up with identical everything, so I think they're as trustworthy as the Linux/Windows ones.
It's the plain 0.06sob version, I've not added any features.
Any system with gcc should take 2 minutes for a new port, so just drop me a note if you want me to look at a new platform.
Long live portable C!
Phil