Mersenne Digest Sunday, August 27 2000 Volume 01 : Number 772 ---------------------------------------------------------------------- Date: Thu, 24 Aug 2000 17:42:31 -0000 From: "Brian J. Beesley" <[EMAIL PROTECTED]> Subject: Re: Mersenne: Re: Top Producers On 22 Aug 00, at 19:15, xqrpa wrote: > 1. Forming a group with a few slow machines, then adding a slew of faster > ones bit by bit, causes an underestimate to be reported, but one > which gradually increases as the new machines report in. Similarly if you run a whole lot of systems for a while then stop most of them, your hours/day will be well in excess of the systems apparently allocated - but falling asymptotically to the true value as time goes on. > > 2. How Ms are picked for processing *seems* to influence the numbers, > too: > PrimeNet can assign exponents automatucally, according to a (to me) > rather > mysterious protocol, or numbers can be gotten using Manual Testing > Forms. Not quite right. The "mysterious" protocol is simply to allocate the smallest exponent available in each assignment type. If an assignment expires it is made available for reallocation in a daily job starting at 0600 UTC. If a user voluntarily returns an assignment it becomes available for reassignment immediately. PrimeNet credits you with CPU time if you use the automatic method to report the result of an assignment but not if you use the manual assignment form. It doesn't matter whether you got the assignment using the automatic method or using the manual assignment form. Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt ------------------------------ Date: Thu, 24 Aug 2000 22:38:08 +0000 (GMT) From: Russel Brooks <[EMAIL PROTECTED]> Subject: Re: Mersenne: Re: Top Producers Brian J. Beesley wrote: > PrimeNet credits you with CPU time if you use the automatic method to > report the result of an assignment but not if you use the manual > assignment form. It doesn't matter whether you got the assignment > using the automatic method or using the manual assignment form. If I screw around with... Prime95->Options->CPU->Hours_per_day_this_program_will_run ...does his affect the hours I'm credited with? I tried it setting low, 8 instead of 24, just before letting Prime95 request more work in the hope it would assign smaller exponents that would finish quicker but I'm not sure I had any effect. Am I just out smarting myself? Cheers... Russ _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt ------------------------------ Date: Fri, 25 Aug 2000 01:42:23 +0200 (CEST) From: Henrik Olsen <[EMAIL PROTECTED]> Subject: Re: Mersenne: Re: Top Producers On Thu, 24 Aug 2000, Russel Brooks wrote: > Brian J. Beesley wrote: > > PrimeNet credits you with CPU time if you use the automatic method to > > report the result of an assignment but not if you use the manual > > assignment form. It doesn't matter whether you got the assignment > > using the automatic method or using the manual assignment form. > > If I screw around with... > > Prime95->Options->CPU->Hours_per_day_this_program_will_run > > ...does his affect the hours I'm credited with? No, it's desided by the size of the number exclusively, and is scaled to the same machine for everyone. > I tried it setting low, 8 instead of 24, just before letting Prime95 > request more work in the hope it would assign smaller exponents that > would finish quicker but I'm not sure I had any effect. You didn't, the server will always give you the smallest assignment it has available, as several have mentioned the pool of assignments is replenished at 6 UTC > > Am I just out smarting myself? Yes. Actually, prime95 will adjust for the real time used after a while, try taking a look at local.ini, the value of RollingAverage is the actual work done, compared to the settings you've given. (1000 is the nominal value) > > Cheers... Russ - -- Henrik Olsen, Dawn Solutions I/S URL=http://www.iaeste.dk/~henrik/ "'Chapter Fifteen, Elementary Necromancy'", she read out loud. "'Lesson One: Correct Use of Shovel...'" Terry Pratchett, Jingo _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt ------------------------------ Date: Sun, 27 Aug 2000 14:47:33 -0400 From: Marc Getty <[EMAIL PROTECTED]> Subject: Mersenne: CPU Time Credit Calculation How does the CPU time contributed get calculated? I would assume that there is a standard credit for each FFT size, but I can't find what that credit is anywhere on mersenne.org. Can anyone help fill in the following? 160 K FFT = ??.?? P90 CPU years 192 K FFT = ??.?? P90 CPU years 224 K FFT = ??.?? P90 CPU years 256 K FFT = ??.?? P90 CPU years 320 K FFT = ??.?? P90 CPU years 384 K FFT = ??.?? P90 CPU years 448 K FFT = ??.?? P90 CPU years 512 K FFT = ??.?? P90 CPU years 640 K FFT = ??.?? P90 CPU years 768 K FFT = ??.?? P90 CPU years 896 K FFT = ??.?? P90 CPU years 1024 K FFT = ??.?? P90 CPU years 1280 K FFT = ??.?? P90 CPU years 1536 K FFT = ??.?? P90 CPU years 1792 K FFT = ??.?? P90 CPU years I doubt that anyone out there is using more then a 1792 K FFT. - -Marc Marc Getty [EMAIL PROTECTED] http://www.temple.edu/dentistry/di/ Department of Dental Informatics, Temple University School of Dentistry Phone: 215-707-8192 Fax: 215-707-2208 Old Dental Building Room 420 _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt ------------------------------ End of Mersenne Digest V1 #772 ******************************
