Mersenne Digest Thursday, February 15 2001 Volume 01 : Number 817 ---------------------------------------------------------------------- Date: Tue, 13 Feb 2001 09:44:56 -0500 From: Jud McCranie <[EMAIL PROTECTED]> Subject: Re: Mersenne: Processor short family histories At 12:54 AM 2/13/2001 -0600, Ken Kriesel wrote: >Intel offered the 286 with 6, 8, 10, and 12.5 Mhz on one data sheet. >AMD got to 16 on this one, but an early data sheet lists 4, 6, and 8 >(and says reprinted by permission of Intel). FPU was separate. >I don't recall a 286-20. Dell had one. At the time I got my Dell 20 MHz 386 (fall 1987) they had a 20 MHz 286. > The 386 debuted at 12.5 and 16 Mhz. I thought it debuted at 16. I never heard of a 12.5 MHz 386. +--------------------------------------------------------+ | Jud McCranie | | | | 137*2^261147+1 is prime! (78,616 digits, 5/2/00) | +--------------------------------------------------------+ _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 13 Feb 2001 17:20:43 +0100 From: Henk Stokhorst <[EMAIL PROTECTED]> Subject: Re: Mersenne: Processor short family histories Jud McCranie wrote: > At the time I got my Dell 20 MHz 386 (fall 1987) they had a 20 MHz > 286. ;-) If it is time to brag about our computers, I owned (still have it) a DAI homecomputer back in 1978 with a 8080A processor running at 2 MHz. And it was blazingly fast. YotN, Henk Stokhorst _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 13 Feb 2001 18:16:18 +-100 From: Denis Cazor <[EMAIL PROTECTED]> Subject: RE: Mersenne: P4 speed and implications thereof >John R Pierce wrote >the P4 is likely gonna ramp up to 2GHz, 3Ghz and beyond faster and farther >than AMD can ramp up the Tbird. The problem with Intel, is they have difficulties to sustain AMD performance, so they wanted to announce higher frequencies, to be the first again. So they doubled the number of pipeline stage from 10 to 20 and they obtained a P4 - 1.4 GHz having the same performances a P3 - 700 MHz. The gain is only on "vectorized" data, when the pipe is full, as on graphics treatments. >Jud McCranie wrote >Yes, most Intel chips max out at about 2.5 times their initial speed, and >they expect the P4 clock speed to go up by at least a factor of 10. And they claimed 1.4 GHz and perhaps 10 GHz soon,to make dreaming on P4. Tomorrow is another day .... Their objectif is only publicity. G4 with small number of pipe line stage has small frequencies but quite the same performances. On the way, 64 bits machines, with Thunderbird like, micro-decoded and 8086-compatible, very performant and inexpensive. Intel product, 8086-incompatible ....... Best regards, Denis Cazor, Paris _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 13 Feb 2001 10:09:13 -0800 (PST) From: John R Pierce <[EMAIL PROTECTED]> Subject: Re: Mersenne: P4 speed and implications thereof > On the way, 64 bits machines, with Thunderbird like, micro-decoded > and 8086-compatible, very performant and inexpensive. Intel > product, 8086-incompatible ....... the 86 architecture is a dinosaur, designed in 1978 to inherit features of the 8080 which was designed in 1973, and needs to die. IA64's VLIW architecture is far more modern, and will carry performance to a far higher level than 64 bit extensions of the same old EAX, [EBX*4+ESI].offset stuff. Anyways, the IA64 has a full pentium compatibility mode, and supports mixed mode processing where you can have 64 bit code running under an extended 32 bit OS, and visa versa, so I dunno what this 'incompatible' noise is about. as far as G4 goes, what I've read and heard is that the performance doing regular programming is fairly poor, its only specific "SIMD" benchmarks that achieve the high numbers Apple likes to toss around. Anyways, to achieve really high clock rates on a complex instruction set you HAVE to go to a deep pipeline. RISC processors got away with a simpler pipeline entirely due to the simplicity of their instruction sets, and even they have run into clock speed limitations that are not easily overcome... All the current high end risc engines have had to resort to things like super-scalar architecture and incredibly complex scoreboarding to hide the details of the pipelines from the instruction set model, once this has been done, the risc vs cisc arguments are somewhat silly. - -jrp _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 13 Feb 2001 15:00:43 -0500 From: "Brian Last-Name" <[EMAIL PROTECTED]> Subject: Re: Mersenne: Processor short family histories >The 486 was the first to offer an on-chip FPU, came out at 20 and >25 Mhz and went to 100 Mhz (core=3x memory bus) >in the Intel line, 133 (4x) elsewhere (AMD?). The 486 socket's performance >could be stretched a little further by using a Pentium Overdrive chip >from Intel; at 83 Mhz (2.5x) giving 1.7x the performance of a 486-66 >in real world finite element analysis (ANSYS). The 486SX was a >no-fpu 486, with full memory bus width. > >The Pentium I's in various subflavors went from 60 & 66 at announcement, >to 200 (nonMMX) and 233 in the MMX type. > The i486 came out in two flavors, the SX and the DX. The 486SX ran at 25 mhz, and had no FPU. The DX ran at 33Mhz, and had a FPU. The SX mobos had room for a math coprocessor, which was BS. The math co was just a 486DX chip which disabled the SX chip. The line was continued with the SX50, DX2 66Mhz and later with the DX4 100Mhz part. Buying the DX4-100 was pretty much a moot point because of the slow memory bus speed. It gave me little or no performance gains in GIMPS competiton, and cost several hundred bucks. All of this I am 100% sure of. The Pentium chip came out at 60Mhz, and went to 75 and 90 within months of release. It went up to 200Mhz. I just looked and found a little processor history page: http://www.ambusiness.com/NT512200.html In my collection I have a ~700Khz TI/99/4A and a 2.6Mhz Apple IIgs. - -Brian _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Thu, 15 Feb 2001 15:56:18 +0000 From: Steve <[EMAIL PROTECTED]> Subject: Mersenne: PrimeStats, Perl script for the PrimeNet Top Producers Table Hi Primepickers PrimeStats is a perl script that interogates the top producers table at: http://mersenne.org/ips/topproducers.shtml, after you've saved it to disk, it will give you a report on participants as specified by yourself in a seperate data file. The script will also give you a detailed report of the future prospects of one user ID that you supply to the script via the command line, this detailed report tells you how many people are in front of the user but going slower and how many people behind but going faster and gives you estimates of when the user will catch the pack in front and when the chasing pack will catch up etc. The script is available here: http://www.zeropps.uklinux.net/linstuff.html And here is a sample report that finds current details for 10 users and gives a detailed report for one of them (me): Run Date: Thu 15 Feb 2001 Participants counted: 20,018 Extra details for user ID: sjlen Position User Name CPU Years Exponents CPU P90 Tested Hrs Per Day 1264 S18743 8.921 16 225.16 3056 felipel 3.667 8 49.83 3171 sjlen 3.512 7 66.59 3496 mbandsmer 3.050 19 24.85 4021 Pse 2.488 5 45.91 5394 Lalo1 1.549 18 12.62 5981 S16318 1.319 3 28.17 6773 mage21 1.010 3 17.49 7411 S17376 0.838 2 19.11 7434 Paradoks 0.833 7 6.84 3171 sjlen 3.512 7 66.59 - ------------------------------------------------ 712 people are faster than you but behind you, at an average speed of 115.27 CPU hours per day they are approximately 1.75 years behind you. You will be in the center of the chasing pack in something like 312.84 days. 825 people are slower than you but in front of you, at an average speed of 51.04 CPU hours per day they are approximately 1.37 years in front of you. You should be in the middle of the pack that you are chasing in something like 763.26 days. Any comments or suggestetions for improvements or error reports are welcome. - -- Cheers Steve email mailto:[EMAIL PROTECTED] %HAV-A-NICEDAY Error not enough coffee 0 pps. web http://www.zeropps.uklinux.net/ or http://start.at/zero-pps 3:39pm up 13 days, 17:18, 3 users, load average: 1.22, 1.18, 1.18 _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ End of Mersenne Digest V1 #817 ******************************
