Mersenne: Re: Mersenne Digest V1 #768
> > Date: Sun, 13 Aug 2000 17:19:58 +0200 > From: Nacho <[EMAIL PROTECTED]> > Subject: Mersenne: GIMPS on Sun Sparc. > > Hello everyone. > > Please excuse my english, I'm spanish. > > I will have a SparcStation at work and I want to put it to do some useful work > with GIMPS. > > I was reading Mersenne pages about software for Solaris and it seems that the > best program is MLucas 2.7a. > A SparcStation is not a very fast machine and I will have it only for 6 > months, so perhaps it will not be very fast to do LL test in new exponents, > and perhaps I'll do doublecheck better. > I have some questions: > > Are there binaries for Mfactor for Sparc/Solaris? I found Mlucas binaries but > not Mfactor binaries. I don't have a f90 compiler. > > I suppose that LL results are 100% identical to Prime95 results, so LL test > will be accepted by primenet server in manual assignment, right? > > If I use the manual assignment pages at PrimeNet, will I receive time credits > at Primenet status pages? > > Thanks in advance for your help. > > Bye! It would have been helpful if you identified the particular model of SparcStation you are using. I have run Mfactor and could make a binary available if people want it. If it is something like a 50 or 70Mhz Sparc 5 or similar I would suggest you might like to contribute to NFSnet. I have one 50Mhz SparcClassic which churns through a range in about 20 days. It's really far too slow to be any use for GIMPS. Bill Rea, Information Technology Dept., Canterbury University \_ E-Mail b dot rea at it dot canterbury dot ac dot nz http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Re: Mersenne: Re: Athlons on DDR MBs: The "Science" Of Overclocking -- A Bell-Curve Black Art?
"Steinar H. Gunderson" wrote: > Funny, my 800 usually reboots frequently while torture testing, even on `only' > 880MHz... 800 is rock stable, though. (Non-DDR, though...) > > /* Steinar */ For a good discussion of overclocking, and the many factors involved, see: http://www.gamepc.com/article/show_article.asp?article=scienceofoc&page=1 Different batches of the same chip can surprise you with their cantankerous variance! Best Wishes, Stefanovic _ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Re: Mersenne: GIMPS on Sun Sparc.
Nacho <[EMAIL PROTECTED]> wrote:
> I will have a SparcStation at work and I want to put it to do some useful
> work with GIMPS.
{snip}
> A SparcStation is not a very fast machine and I will have it only for 6
> months, so perhaps it will not be very fast to do LL test in new exponents,
> and perhaps I'll do doublecheck better.
The "best" choice here depends on the type of Sparc, how many hours per day
you'll be getting on it, and your taste with respect to assignment type.
If you like to be able to turn something in at least once a month or so,
double-checking is the way to go. DCing is also a better use of the cycles
on hardware where there is a significant relative performance drop in going
from DC to first-time-test sized exponents. Interestingly, an old Sparc 1
is often better in this last regard than a top-of-the-line E450: the Sparc 1
shows lower relative performance at DC-size exponents, but suffers little or
no performance degradation at larger runlengths. So if you don't mind waiting
3-4 months for a result and prefer doing first-time tests, go ahead and set
your old Sparc to doing one.
> Are there binaries for Mfactor for Sparc/Solaris? I found Mlucas binaries but
> not Mfactor binaries. I don't have a f90 compiler.
No Sparc binaries at present, but Mfactor is written (not by me) in ANSI C,
so just follow the compile instructions in the source code header.
One caveat, though: for sieving up to depth 2^53, Mfactor performs OK on
the Sparc because it can use the FPU to help with the double-width integer
multiplies. However, the Sparc truly sucks at integer multiply (Jason
Papadopoulos likes to say that this is the *only* thing the Sparc sucks at),
so for sieving beyond 2^53 the Sparc will be pretty awful. You'd be better
doing the factoring on a PC (or not at all) and using the Sparc for LL
testing.
> I suppose that LL results are 100% identical to Prime95 results, so LL test
> will be accepted by primenet server in manual assignment, right?
Yes. You do need to paste *only* the exponents into the Mlucas worktodo.ini
file. When your latest job finishes, copy the last line of results.txt (or
of the *.stat file corresponding to the exponent in question) into the
PrimeNet manual tests form and submit. When reserving exponents, I suggest
you ask for the maximum amount of time (120 days); if the exponent isn't done
at the end of that period, you can extend the assignment by another 120 days.
Which CPU type you report to the server when requesting work is up to you.
I usually enter "Pentium" or "PII/PPro" so as to get a reasonable amount of
work (I'm not sure what weighting factor the server uses for machines entered
as "Other".) I suspect other Mlucas users do the same, which means that non-x86
machines are underrepresented (relative to their true numbers) on PrimeNet's
world test status page.
> If I use the manual assignment pages at PrimeNet, will I receive time credits
> at Primenet status pages?
Your manual test work won't show up on the PrimeNet server's pages, but will
appear on George's master list, www.mersenne.org/top.htm and ...top2.htm ).
I'm somewhere between #200 and #300 on the top2.htm page, and 90% of that
work is from Mlucas manual tests. (Admittedly, I have access to slightly
more hardware that a single Sparc, but every contribution is valuable.)
Happy hunting,
-Ernst
_
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Mersenne: Re: Athlons on DDR MBs
On Fri, Aug 11, 2000 at 01:06:11PM -0700, Stefan Struiker wrote: >much cooler, and the 700 (see review) has been pushed to nearly 900 without >much complaint or special cooling. Funny, my 800 usually reboots frequently while torture testing, even on `only' 880MHz... 800 is rock stable, though. (Non-DDR, though...) /* Steinar */ -- Homepage: http://members.xoom.com/sneeze/ _ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Mersenne Digest V1 #768
Mersenne DigestSunday, August 13 2000Volume 01 : Number 768 -- Date: Thu, 10 Aug 2000 20:55:47 EDT From: [EMAIL PROTECTED] Subject: Mersenne: Spam (bad) and PNG (good!) <> Ew. First spam I've seen on the Mersenne list in a long time. Probably ever. And another, happily non-spam, E-mail: << there are still a LOT of folks using Netscape 3 and other such browsers that don't support PNG. >> I sort of doubt it. The whole GIMPS project is oriented to techie types. Types who like to stay current with the latest technology and would upgrade their browsers frequently. Also add in the fact that Internet Explorer, last I heard, is gaining popularity and that IE4 and IE5 support PNGs (haphazardly, but enough for banner purposes), and that Microsoft practically forces people at gunpoint to upgrade, and so I'm guessing almost all IE users can see PNGs. In addition, newer versions of Netscape can see PNGs. That leaves, like, the Netscape 3 users. I really doubt that there are that many Netscape 3 users out there. (Doesn't it have the most primitive level of Javascript support and whatnot as well? Hopefully that would have annoyed users into upgrading by now. It sure did for me and IE3.) Maybe someone who's a webmaster could check their server logs and see how many non-PNG compliant people are viewing their pages; it'd be rather representative if Mr. Kurowski could do that. I think it'll be a small minority, maybe an order of magnitude higher than the number of people who still use Lynx. I suppose... if it turns out that most people who visit GIMPS sites still haven't seen the light of day and switched to a PNG-supporting browser, I could go back and provide GIF versions of the banners again. Though I don't particularly like the idea; PNG is just way too cool. Stephan "PNG! PNG! PNG!" Lavavej _ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt -- Date: Thu, 10 Aug 2000 22:13:16 -0400 From: George Woltman <[EMAIL PROTECTED]> Subject: Mersenne: Re: PNG (good!) Hi, At 08:55 PM 8/10/00 -0400, [EMAIL PROTECTED] wrote: ><< there are still a LOT of folks using Netscape 3 and other such browsers >that don't support PNG. >> From the August statistics collected by Hitbox on visitors to the GIMPS pages: Version Visitors % 1. MSIE 5.x1,70553.26 2. Netscape 4.x1,17336.63 3. MSIE 4.x2247.00 4. MSIE 5.x (AOL)541.69 5. Netscape 3.x120.37 6. MSIE 3.x100.31 7. Netscape 5.x80.25 8. MSIE 4.x (AOL)50.16 9. MSIE 2.x40.12 10. MSIE 3.x (AOL)40.12 11. Opera 3.x20.06 12. Opera 2.x10.03 Total 3,202 100.00% These stats are available for anyone to look at. If you are curious just follow the link after the "Last Updated" line on every GIMPS web page. Regards, George _ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt -- Date: Fri, 11 Aug 2000 00:30:42 -0400 From: Pierre Abbat <[EMAIL PROTECTED]> Subject: Mersenne: PNG (good!) >I sort of doubt it. The whole GIMPS project is oriented to techie types. >Types who like to stay current with the latest technology and would upgrade >their browsers frequently. Also add in the fact that Internet Explorer, last >I heard, is gaining popularity and that IE4 and IE5 support PNGs >(haphazardly, but enough for banner purposes), and that Microsoft practically >forces people at gunpoint to upgrade, and so I'm guessing almost all IE users >can see PNGs. In addition, newer versions of Netscape can see PNGs. That >leaves, like, the Netscape 3 users. I really doubt that there are that many >Netscape 3 users out there. (Doesn't it have the most primitive level of >Javascript support and whatnot as well? Hopefully that would have annoyed >users into upgrading by now. It sure did for me and IE3.) Maybe someone >who's a webmaster could check their server logs and see how many non-PNG >compliant people are viewing their pages; it'd be rather representative if >Mr. Kurowski could do that. I think it'll be a small minority, maybe an >order of magnitude higher than the number of people who still use Lynx. Netscape 4.08 supports PNG but ignores the alpha channel. kfm understands the alpha channel, but only on or off - it borderlines it at 7f or 80; and when it prints a page with a PNG in it, the alpha is ignored. I recently had to do layer surgery on a PNG because it didn't print right. phma
Mersenne: GIMPS on Sun Sparc.
Hello everyone. Please excuse my english, I'm spanish. I will have a SparcStation at work and I want to put it to do some useful work with GIMPS. I was reading Mersenne pages about software for Solaris and it seems that the best program is MLucas 2.7a. A SparcStation is not a very fast machine and I will have it only for 6 months, so perhaps it will not be very fast to do LL test in new exponents, and perhaps I'll do doublecheck better. I have some questions: Are there binaries for Mfactor for Sparc/Solaris? I found Mlucas binaries but not Mfactor binaries. I don't have a f90 compiler. I suppose that LL results are 100% identical to Prime95 results, so LL test will be accepted by primenet server in manual assignment, right? If I use the manual assignment pages at PrimeNet, will I receive time credits at Primenet status pages? Thanks in advance for your help. Bye! _ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
