Mersenne Digest Thursday, August 12 1999 Volume 01 : Number 613
----------------------------------------------------------------------
Date: Tue, 10 Aug 1999 11:33:06 -0400
From: "Stephan Grupp" <[EMAIL PROTECTED]>
Subject: Mersenne: OC
>>snip
> 2. Is overclocking of my Celeron 333 a good idea? I probably can't
do
> it just now (EPoX P2-112A motherboard isn't made for such purposes),
> but I could upgrade it in about 2-3 months' time.
No. This can often lead to errors, and newer CPU's are on the edge of
sanity when it comes to heat anyway. I've heard that a Celeron can
burn
it self out completely in a few minutes without a heat sink.
>>end
Many of the GIMPS participants are unrepenetant overclockers. Among my
machines, I am running 4 Celeron 300a OC to 450 (still the OC king for
cost/benefit and reliability, if you can get one any more). The keys to
good OC are covered exhaustively elsewhere, but good cooling, the right
chip, and (for GIMPS) running a torture test before running real
exponents are the most important issues. On the other hand, the
cost/benefit of getting a new MB just to OC your chip would be dubious.
One thing I would agree with, though - you'd have to be crazy to run a
Celeron (not to mention an OC'ed Celeron!) without a good heat sink with
fans and a good case fan.
- -steve
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------------------------------
Date: Tue, 10 Aug 1999 20:04:57 +0200
From: "Shot" <[EMAIL PROTECTED]>
Subject: Mersenne: Contacting PrimeNet during LL test
Hi.
Somebody should tell me that I'm flooding this list with stupid
questions, but I really try to get to all the FAQs/digests/ReadMes
before I post, and I'm still not satisfied with the answers...
Should I contact PrimeNet from time to time to assure it (her? ;)
that I'm still whith the GIMPS? My prime.log file says:
Sending expected completion date for M8180017: Oct 02 1999
Since then the ECT changed to Sep 21 1999.
If I should contact PrimeNet, how should I do it? Just by leaving
Prime95 on during dial-up connection, or should I check "Send new
completion dates to PrimeNet server" in Test | PrimeNet... menu
first? I always close Prime95 completly before connecting, because my
modem is very processor-dependent (it is the cheapest available here,
Zoltrix Phantom), so it couldn't have connected yet except when it
download my current task.
Thabks in advance
- -- Shot
__
c"? Shot - [EMAIL PROTECTED] hobbies: Star Wars, Pterry, GIMPS, ASCII
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Science Explained (by Kids): Many dead animals in the past
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------------------------------
Date: Tue, 10 Aug 1999 12:49:47 -0700
From: "Joth Tupper" <[EMAIL PROTECTED]>
Subject: Re: Mersenne: Contacting PrimeNet during LL test
Yeah, I contact Primenet whenever I feel like it.
I like to establish a modem connection, click {Test|Stop}and then
{Test|PrimeNet...}, click Send new completion dates and OK. Some of my
machines (usually 3) connect over a LAN and update PrimeNet automatically.
Two I use this somewhat manual technique for. I try to remember to send new
dates at least once a month for each machine running.
Joth
- ----- Original Message -----
From: Shot <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, August 10, 1999 11:04 AM
Subject: Mersenne: Contacting PrimeNet during LL test
> Hi.
>
> Somebody should tell me that I'm flooding this list with stupid
> questions, but I really try to get to all the FAQs/digests/ReadMes
> before I post, and I'm still not satisfied with the answers...
>
> Should I contact PrimeNet from time to time to assure it (her? ;)
> that I'm still whith the GIMPS? My prime.log file says:
> Sending expected completion date for M8180017: Oct 02 1999
> Since then the ECT changed to Sep 21 1999.
>
> If I should contact PrimeNet, how should I do it? Just by leaving
> Prime95 on during dial-up connection, or should I check "Send new
> completion dates to PrimeNet server" in Test | PrimeNet... menu
> first? I always close Prime95 completly before connecting, because my
> modem is very processor-dependent (it is the cheapest available here,
> Zoltrix Phantom), so it couldn't have connected yet except when it
> download my current task.
>
> Thabks in advance
> -- Shot
> __
> c"? Shot - [EMAIL PROTECTED] hobbies: Star Wars, Pterry, GIMPS, ASCII
> `-' [EMAIL PROTECTED] join the GIMPS @ http://www.mersenne.org
> Science Explained (by Kids): Many dead animals in the past
> changed to fossils while others preferred to be oil.
> _________________________________________________________________
> Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
> Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
>
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------------------------------
Date: Tue, 10 Aug 1999 14:50:15 -0500
From: JON STRAYER <[EMAIL PROTECTED]>
Subject: Mersenne: AMD Athlon
> Superior floating point performance: Clock for clock, AMD Athlon
> processor-based systems deliver significantly better floating point
> performance than comparably configured Pentium III and Pentium III Xeon
> systems, according to the SPECfp_base95 and Ziff-Davis 3D WinBench(tm) 99
FPU
> WinMark benchmarks.
> For example, a 550MHz AMD Athlon processor has more than 35 percent higher
> performance than either a 550MHz Pentium III or a Pentium III Xeon on the
> SPECfp_base95 benchmark.
Does anyone out there have one of these doing LL tests yet?
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------------------------------
Date: Tue, 10 Aug 1999 16:59:16 -0400
From: "Paul Missman" <[EMAIL PROTECTED]>
Subject: Re: Mersenne: AMD Athlon
- ----- Original Message -----
From: JON STRAYER <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, August 10, 1999 3:50 PM
Subject: Mersenne: AMD Athlon
>
> Does anyone out there have one of these doing LL tests yet?
The two initial systems (IBM and Compaq) won't be available
for a couple weeks yet. I believe that one motherboard may
be available this week, but CPU chips won't be publically available
until at least next week.
I emailed one of the test sites that has an evaluation unit, to see
if they would run a Prime95 test, but haven't received a response
yet.
Paul Missman
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------------------------------
Date: Tue, 10 Aug 1999 19:29:11 EDT
From: [EMAIL PROTECTED]
Subject: Mersenne: Win 98 SE Internet sharing
Has anybody had any experience of using the internet sharing feature on 98SE
to connect Prime95 accross a LAN?
I've tried a few times unsuccessfully to network prime using the proxy server
and Wingate and am begining to get fed up!
Can anybody mail me step by step instructions for an easy way do do this?
I've tried following the FAQ's and seem to get stuck pretty near the
begining! doh!
Thanks,
Lawrence......
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------------------------------
Date: Tue, 10 Aug 1999 19:05:19 -0700 (PDT)
From: poke <[EMAIL PROTECTED]>
Subject: Re: Mersenne: The list's archives
I'm hosting a few "bytes" of the lists past e-mails. I offered to do more
but that was almost 1.5 years ago. I forget who was doing it, but if
you're still out there, I've got plenty more space where that came from.
- -Chuck
On Tue, 10 Aug 1999, Shot wrote:
> Hi.
>
> I would like to know where I can find the list's recent archives.
>
> I followed the links from GIMPS' page, to
> http://www.scruznet.com/~luke/archives/digest/ page. All I found
> there were the digests dated 8 July 1996 (file v01_0001.txt) to 7
> June 1998 (file v01_0375.txt) - these were packed into 01_001.zip to
> 01_015.zip files. There are also unpacked files v01_0351.txt to
> v01_408.txt, which is about (I couldn't check exactly, so I guess)
> mid-August '98.
>
> The problem is I digged through these 1-375 editions (it took me
> about five days, skipping some topics uninteresting to a GIMPS newbie
> like myself), and I'm now downloading those 376-408 issues (it would
> be much easier if they also were packed). But what should I do when I
> read them all? Are there any more past digests (packed, preferably)?
> I just don't want to post questions that were answered recently,
> because I know how annoying this is (from reading those digest, for
> example).
>
> Best wishes
> -- Shot
> __
> c"? Shot - [EMAIL PROTECTED] hobbies: Star Wars, Pterry, GIMPS, ASCII
> `-' [EMAIL PROTECTED] join the GIMPS @ http://www.mersenne.org
> On a box of a clockwork toy in Hong Kong: Guaranteed to work
> throughout its useful life.
>
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------------------------------
Date: Wed, 11 Aug 1999 09:54:08 +0200
From: "Hoogendoorn, Sander" <[EMAIL PROTECTED]>
Subject: RE: Mersenne: The list's archives
I found the folowing page
http://archive.jab.org/mersenne%40base.com/
I think they go back to 14-9-1998
Sander
- -----Original Message-----
From: poke [mailto:[EMAIL PROTECTED]]
Sent: woensdag 11 augustus 1999 4:05
On Tue, 10 Aug 1999, Shot wrote:
> Hi.
>
> I would like to know where I can find the list's recent archives.
>
> I followed the links from GIMPS' page, to
> http://www.scruznet.com/~luke/archives/digest/ page. All I found
> there were the digests dated 8 July 1996 (file v01_0001.txt) to 7
> June 1998 (file v01_0375.txt) - these were packed into 01_001.zip to
> 01_015.zip files. There are also unpacked files v01_0351.txt to
> v01_408.txt, which is about (I couldn't check exactly, so I guess)
> mid-August '98.
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------------------------------
Date: Wed, 11 Aug 1999 11:00:39 -0500
From: "Willmore, David" <[EMAIL PROTECTED]>
Subject: RE: Mersenne: AMD Athlon
> The two initial systems (IBM and Compaq) won't be available
> for a couple weeks yet. I believe that one motherboard may
> be available this week, but CPU chips won't be publically available
> until at least next week.
>
> I emailed one of the test sites that has an evaluation unit, to see
> if they would run a Prime95 test, but haven't received a response
> yet.
>
> Paul Missman
>
I did the same thing with Tom's Hardware info site. www.tomshardware.com
They're very reputable. I sent him a nice *long* letter about how good
GIMPS code is for showing FPU performance. :) We'll see if it has any
effect. I haven't received any reply from them, yet.
Cheers,
David
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------------------------------
Date: Wed, 11 Aug 1999 18:07:44 +0200
From: Guillermo Ballester Valor <[EMAIL PROTECTED]>
Subject: Mersenne: Cleared exponents
Hi:
There are two databases in GIMPS/Primenet project. The master is the
GIMPS one and includes all information about the search, and therefore
includes the basic information from Primenet data. There is a lot of
data in Primenet and the synchronization is performed every few months.
Till today, I though the synchronization scheme was to take the results
received before a date, and then clean these exponents in reports like
cleared exponents (cleared.txt) and individual account reports (anyway,
the credits are taken into account). But I'm wrong :-(.
It seems the last synchronization was on Aug-9, and my exponents
finished before that day disappeared from my personal account report as
I supposed correct. But in the cleared exponents report there are a lot
of results sent to Primenet before Aug-9. My results are not in this
list, so... Why other results from other accounts remain in it?.
Thanks for your time.
| Guillermo Ballester Valor |
| [EMAIL PROTECTED] |
| c/ cordoba, 19 |
| 18151-Ogijares (Spain) |
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------------------------------
Date: Wed, 11 Aug 1999 17:10:34 EDT
From: [EMAIL PROTECTED]
Subject: Mersenne: Timings page
Will Edgington writes:
>Or does someone already maintain a page with timings
>for non-Intel CPUs? I don't recall seeing one.
Yes, there was such a page, but the person maintaining it never did much
beyond some initial small timing samples.
George, if you agree that the page is basically defunct, I'll be happy to
maintain it.
I suggest making a table listing both the raw per-iteration timing for a given
code X on a given machine, but also defining a nondimensional parameter that
measures the performance of code X relative to Prime 95, normalizing for clock
speed, e.g. let rp = relative performance:
(code X iter. time)/(code X machine clock rate)
rp = ------------------------------------------------------------------- .
(Prime95 iter. time)/(Pentium clock rate)
Thus, Prime95 = 1 by definition. Any rp < 1 indicates relastively poorer
performance
than Prime95, whereas rp > 1 indicates relatively better performance.
The table should include complete timings for a wide range of FT lengths,
including
non-power-of-two runlengths. Then, codes lacking non-power-of-two runlengths
would
list timings for those based on the timing for the next-higher power of two,
i.e. would
automatically be penalized for lacking, say, N = 384K, by having to use the N
=512K
timing (and rp relative to the Prime95 384K timing) in that column.
We should strive for as wide a range of machines and subtypes as possible, so
as
to quantify more-subtle things such as behavior vs. cache size, which can be
very
different for different implementations (e.g. codes like Prime95 and
MacLucasUnix which are designed for small-cache, bandwidth-limited systems
will perform well
on such systems, but may tend to benefit less from larger caches).
And of course we should allow for plenty of room for comments about the
various
codes, e.g. whether it needs a particular compiler, whether binaries are
available,
whether it includes an integrated factorer, who maintains it, etc.
- -Ernst
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------------------------------
Date: Wed, 11 Aug 1999 17:43:15 -0500
From: "Chris and Carrie Harrison" <[EMAIL PROTECTED]>
Subject: Mersenne: athlon interation speeds
athlon 600
here are the timings
sec interaction total 10 interations
>1340000 0.025 .247 9 hours
1670000 .025 .252 11hours
1950000 .031 .307 16hours
2300000 .038 .379 1day
2660000 .058 ..583 2days
3300000 .059 .590 2days
3950000 ..073 .731 3 days
4600000 .090 .898 5 days
5250000 .102 1.023 6 days
6500000 .132 1.32 10days
7500000 .161 1.612 14 days
10000000 .220 2.206 25 days
Anyone have some p3-600 timings?
Later
Chris
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------------------------------
Date: Thu, 12 Aug 1999 07:47:12 -0400
From: "Paul Missman" <[EMAIL PROTECTED]>
Subject: Re: Mersenne: athlon interation speeds
Interesting.
My 400 MHz Celeron, working on 7450277 is getting
0.203 per iteration. This means we only got about 15%
speed increase for an extra 200 MHz, and an improved
architecture. Based on other benchmarks for the Athlon,
I'd hoped to see more of an increase.
Perhaps between 400 and 600 MHz, we are running into
memory speed limitations, given the large amount of
memory activity caused by Prime95 program. Perhaps
133 MHz memory will help us out here.
Comments?
Paul
From: Chris and Carrie Harrison <[EMAIL PROTECTED]>
> athlon 600
> here are the timings
> sec interaction total 10 interations
> >1340000 0.025 .247 9
hours
> 1670000 .025 .252
11hours
> 1950000 .031 .307
16hours
> 2300000 .038 .379
1day
> 2660000 .058 ..583
2days
> 3300000 .059 .590 2days
> 3950000 ..073 .731
3 days
> 4600000 .090 .898
5 days
> 5250000 .102 1.023
6 days
> 6500000 .132 1.32
10days
> 7500000 .161 1.612
14 days
> 10000000 .220 2.206
25 days
>
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------------------------------
End of Mersenne Digest V1 #613
******************************
