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Exciting?
No, I'm not really.
However, I do have a few things to
say. First of all, you'll notice
the return of the properly working
counters. No longer do you have to
wait five minutes for the darn
counter to load, which results in
java script errors when you try
and click on something on the
page. I'd also like to thank Action
for pointing out that my link to
the April Archives section was
broken. It's fixed now, so feel
free to visit and look at the news
of yore (the link is at the bottom
of the page here).
I've
updated the info in the results
table, and yes, I'm aware of the
script error there. I'll try and
work on that later. It's actually
an easy fix, but I'll need Guru
to put everything in place for me.
So, since I wasn't able to fix
that, I finished my update on the
speed tips page. I've included
more up to date information, such
as chipsets, new CPU info, and
updated OS info. I removed some
old stuff that wasn't relevant
anymore, etc.. If you see
something that I forgot,
misspelled or just plain broke, do
feel free to let me know. -Rat
Playing
with numbers...
Like
many of you who use SetiSpy to
keep tabs on how our wu's are
cooking I have often
wondered about the
'compare' info on the
performance tab. So
here's some background
detail from Roelof about
multipliers and processors. I
shall let him do the work:
"The
analysis is based on my concept
of CPU Cycles / FLOP, or CpF,
which is documented on http://pages.tca.net/roelof/setispy.
If you keep in mind that WU time
= 555 (CpF / MHz ). At low (<
5) multipliers, the PIII CuMine
is hard to beat in terms of
processing efficiency. If you
can get hold of an PIIIEB 533
(4x multiplier) and somehow can
get it to run on a 180 MHz FSB
(720 MHz), you will be smoking a
unit in less than 4 hours!
At higher (> 5) multipliers,
the old PII/III (Dechutes and
Katmai) processors are the most
efficient. Pity you can't get
them in higher than a 6x
multiplier!
At
a 5x multiplier, the CuMine and
Katmai have equal performance.
However, for each increase of 1
in the multiplier over 5, the
CuMine becomes 1 CpF less
efficient than the Katmai. At a
6x multiplier the PIII CuMine,
(old) Celeron, and Athlon all
have equal performance. At
multipliers higher than 6, the
Athlon appears to bethe most
efficient, then the Celeron, and
last the CuMine. What is that
all about? (Motherboards, I
guess).
It
looks like a 1 GHz Athlon (10x
multiplier) will come in at
about 6:20, which is just
slightly less than I am getting
on my 600 MHz P3 Katmai (6x
multiplier). An 850 MHz PIII
CuMine (8.5 multiplier) comes in
at 7:50, which is about the same
time as a 450 MHz (4.5x
multiplier) Pentium II. What is
that about?
When the L2 cache is large
enough (1 MB or larger) the
multiplier has no effect on the
CpF, as demontrated by the
PII/III Xeons and PowerPC
G4. Looks like the best
you can do for SETI (except the
Xeon/G4 solution) is to run a
CuMine with a 5x (or less)
multiplier at the highest
possible FSB speed. Just shows
you again, High FSB + Low
Multiplier = Good
SETI performance."
Bench
till you drop
Times
galore and though the results
table might not reflect those I
mention, it will catch up
eventually. Anyway recognition to
those who have submitted is due.
Thanks for your efforts. Anyone
I've missed apologies in
advance. Since several
are from 'jonluck' I'll start
there. Ranging from 7:40 to
14:03 on a multitude of OS's and
Celeron speeds shows devotion to
duty. You've been a busy bunny,
must be spring. It would be fun to
think this was one system with a
variety of mobo's and
os's being swapped in
and out for the thrill of
benching knowledge. Seems
unlikely. Anyway jon your times
are now peppering the
results. In
the rare sighting department
we have gpriatko with a solid 5:23
using W2K and Williams
Mac G3 copping a 6:23, which
seems a little slow for such
a beast. But I guess some
people use their systems in the
real world too.
Two times from Guru:
Celeron at 583 giving 6:53, good
but nothing special and a much
improved 6:26 by upping the fsb to
110. Any 366 Celery at 600MHz plus
is impressive. Serious cooling or
just a really good batch? There is
probably still a little more to
come though. Bo used CAS2 settings
to drop his time to an excellent,
for a PII, 7:18. Memory
tweaks are the easiest and most
stable, assuming you are not at
the top end of overclockdom.
In the very hotly contested 4 hour
bracket Turbo has upped the bus
again to post 4:36. You
guys just keep pushing it don't
you. And just at the point where I
say a 155 fsb is getting
silly along comes
Tomslik's 4:49 using a 166
bus! Who cares about UT/Quake
performance when you can
brag a 166 fsb. Action has
shaved 4mins off to improve to
4:07, how you ask, gripped? By
running one client instead of 2 is
the answer. Yet again showing how
a 1MB Xeon cache is big enough to
give almost no appreciable hit
when using 2 clients. Anyone
know a cheap source of Xeon's?
Great Seti crunchers. Action, the
other PIII Xeon time you posted
was bit mysterious could you
elaborate or was it a bad night?
Honorable mention goes to the new
leader in the 'slowest' race.
Chris Marble hammered a
105:39 out of his 33MHz box. We
are not talking semiconductor
dragstrip performance here.
Congrats in showing that anything
no matter how slow is worthy to
crunch for Seti. Without starting
an artificially slowed parade of
submissions can anyone beat that?
Running this slow you could count
time by watching the
day/night cycle on the Seticam
pointed at Arecibo! It's off line
at present but you can view your
favourite dish (on cam B) in the
fall at http://www.seti-inst.edu/seticam/Welcome.html.
Beats paint drying, grass growing
and snail racing - just. Max out.
Happy
Easter!
I'll say this today so
that I don't miss everyone
tomorrow- Happy Easter.
Okay, back to business. I'm
currently playing with the navbar
on the site, so don't worry if
something doesn't work- I'll get
it fixed in short order. If it's
still broken after a couple of
days, do let me
know. I'm going to link
the navbar over to Guru's
table, which is a heck of a lot
nicer than mine. If I have time
later (I dunno, but I'll try), I'm
going to update the speed tips,
which are sorely in need of
updating. Enjoy your holiday, and
remember to drive safe. -Rat
Competition
Time Folks
Rat here, just posting
some news from Max that I had
accidentally misplaced in my
mailbox. Less than a week old now,
it's still interesting!
All of sudden the Register http://www.theregister.co.uk/000413-000003.html
has got the Seti bug. This august
organ has issued a challenge to
find the fastest home owned Seti
crunching system. Music to your
ears I think. But then those of
you submitting benchmarks have
been doing just that for quite
some time now for merely the
respect, admiration and envy of
slower rivals. For many it is
the satisfaction of wringing a
little extra performance and
sliding a few minutes up the
results table. So an 'Intel
bunnyperson' (suit, not contents I
assume) as the prize incentive
should get you drooling or gagging
depending on the sadness in
your life. Maybe you always
fancied something kinky in a fab
plant. I digress. Unfortunately
the 'competition' is so full of
holes that a large BEM could slime
through it. In case you are
wondering I have already emailed
Mr. Thomas that an obvious
candidate as a benchmark wu
already exists. Check it out and
decide whether you fit the
criteria. Now what colour do I
want mine in. Max out.
Working
behind the scenes
Rat
here, and no, I'm not dead. I feel
like it sometimes though. This
weekend is a perfect example of
what can go wrong will go wrong.
As the weather is starting to head
to happy spring time cheer, I
decided it was time to pull my car
out of storage. I had Friday off,
and Baby and Mommy were out of
town for the weekend. So it's the
perfect time to get the car out,
and to work on the web page.
I blew a tire right before I
parked it, so I had to replace it.
On ThursdayI called Tires Plus,
the local tire chain, to find out
if they had one. Nope, but they
could have one by Friday.
Excellent. So I ordered the tire,
and went to my Dad's house on
Friday morning (that's where I
parked the car for the winter).
After doing fixing a few things on
his computer, I took the rim to
town to have the tire mounted.
After about 30 minutes, I pay for
the tire, and they roll it out.
Hmm...that looks like a Buick
tire, not a Corvette tire. Wrong
one. I told the salesman this. He
told me that this one was 'an even
better tire'. It is for snow, but
not for me. Not to mention, I'm
changing one tire. That
clue anyone else off? Like I have
3 others that DON'T match?
Moron. So, he called around and
found one in stock in the Plymouth
store, which is where I just came
from. About 40 miles away. Damn. I
went back to my Dad's, and
finished a few other things on the
car. After my friend got home from
work, we took the rim to the
Plymouth store. Only to find them
mounting the last one on someone
else's car. I was told they had
one in Apple Valley though. So
helpful..
Feeling rather downtrodden for the
day (They closed before I could
get to the next store), I went
back to my Dad's to drop off my
friend. I spent the night there,
and was too sick on Saturday to do
anything. Yech. Come Sunday, I
went to the Apple Valley store,
which is about 50 miles away. This
is getting old. I dropped off the
tire and was told it would be 'a
while'. Hmm..I have to go to the
airport before too long, but I did
allow some extra time. An hour and
a half later, it was finally one
(it takes 10 minutes to mount and
balance a tire). Someone remind me
not to do business with them
again!
Anyways,
enough of my complaining. I could
go and and talk about my DOA
motherboard that showed up Monday.
But I won't. Instead, I'm going to
get back to work and try and
update some more site info. I've
started archiving the news info,
which you can find right
here. I'll be adding a
permanent link too, so don't fret
about it. I just want to make sure
that all of the interesting
information that comes up in the
news doesn't get lost like it did
with the old page, which wasn't
archived at all. I'm not sure how
much I'll be able to get done, but
I can do more if I don't talk. So
I'll shutup now and get back to
work. -Rat
Last minute
addition- Guru has finished his
script for the results table. It's
awesome! While we don't have the
final version up quite yet (that
DOA motherboard is the server's),
feel free to take a nice look at
the prototype!
You'll like it- I promise. Oh..see
they pretty orange headers on the
table? The ones that say CPU type,
Speed, etc? Try clicking on
them... -Rat
Everything
faster than everything else
After
posting Dale Hollenbaugh's seriously
swift time at the top of the tree
others have come out of the
rackwork and made the top end a
bit more respectable and
competitive. Up till now the real
excitement has centred on
gentler (!) paced
systems improving a few %
through setup and running tweaks,
to gradually sneak up the
listing. But some recent
submissions have focussed firmly
at the sharp end. So we
have Angus and Risc 8500 sliding
comfortably under the 3 with a
2:40 but to really show the way
things are going try
imagining something
that runs 8 benchmark
wu's side by side in 45 mins.
About time an UtraSparc showed its
grizzly hide. Theoretical output
of around 230 wu's per 24hrs
- bearing in mind the vagaries of
completion times. If there are
anymore wild children who
fancy putting their kit to the
sword be our guest in the spirit
of Ars Team Lamb Chop. Just
remember if you don't have
privileges/admin rights or pay the
wages be careful. I seem to
remember Aaron Blosser having
a run in with his employer and the
law a while back (arrested Sept
'98) because of a distributed
GIMPS program. It ended in tears
all round. His tale
is weblore now but it could
be you next. Warning over.
Also in yesterdays goodie bag was
fsgray cementing his (?, let's not
be sexist here) fastest NT4
PIII@500 position by another 2
mins to 6:48.
The
Ars Seti forum has commenced
yet another thread, so update and
enjoy http://forum.arstechnica.com/forum/ubb/Forum12/HTML/000948.html.
The forum now boasts a mail list
so if you want 'thread to
door' delivery sign up at http://mail.seaplace.org/mailman/listinfo/teamlambchop .
The accent at the moment is very
firmly on L2 cache size effects on
a slew of processors plus of
course some wishful thinking about
future developments. If you
want hardcore Seti that's the
place to go. Need tips on
implementation across various
platforms and networks then the
Seti thread archives contain a
wealth of detail. But take your
waders! Great to see the
discussion moving fast and in
depth after a slight lull, good
stuff people.
In
regards submissions: I don't want
to post my guesses and though Rat
knows more than he can remember
there are times when empathic
telepathy just doesn't fill in the
blanks...so as a general
rule if we can't work
out the details we'll leave a ?
and you can update us as
necessary.
Thanks.
Max out.
The
tweak and the thrash (aka tortoise
and hare)
Remember
Guy Olinger (March 25 update) who
gave us his quest for a quick Seti
speed predictor and found Sandra
2000 Fpu memory bandwidth as a
candidate. Well he's been
ferreting more normal routes
recently by reducing his ram CAS
settings, one of the recognised
speed tips. His Cu 781Mhz (142
bus) brings in a slightly under
par 5:45 at CAS 3. Remember there
are Celerons in this neck of the
woods! The system is unstable
using CAS 2 so to get a bench he
reduced the bus to 130 for
reliability. So now he has a Cu
715Mhz (130 bus) with a much more
respectable 5:10. Plus now there's
scope for improvement if he finds
some quality Cas 2 ram to run at
142, sub 5 easy and into the big
boys arena. Moral: less
speed can be more...
Max out.
Physics
defied, explained. Chemistry
tomorrow?
I came across this at The
Register a few days ago and
grinned knowingly at the 2nd
paragraph. No mention is made
of using the ars benchmark wu so
conclusions were open to
interpretation. Anyway here's some
content...
Pentium
defies law of physics :
07/04/2000
5:00pm by Andrew
Thomas http://www.theregister.co.uk/000407-000011.html
"A
third machine has a Coppermine
700MHz, 256MB and a much faster,
20GB hard disk. It takes an
average of between 10.5 and 11
hours to complete a SETI@Home work
unit, with Windows 2K reporting
100 per cent CPU utilisation. The
Lancewood takes between nine and
ten hours to complete a SETI unit,
Win2K indicating that only one
processor is used to handle the
task, using 95 per cent CPU time,
the second processor merely
ticking over at two to three per
cent.
So we have a 700Mhz machine with
twice the RAM running flat out,
being soundly thrashed by just one
500 chip in the dual box ambling
along at 95 per cent of full
speed."
Didn't think too much of it, when
has ambling been 95%? But a few
days later an interesting
update appeared and
here are a few snippets (note the
word 'benchmark' in first para) http://www.theregister.co.uk/000411-000015.html
Guy
Morrogh adds: "One processor
runs all the system processes and
handles all the interrupts,
including handlers for the clock,
disk, screen (drawing graphics
etc). These have to be swapped
into the cache, meaning that the
benchmark gets pushed out and has
to be reloaded into the cache.
With two processors, only one
processor gets hit when these
run".
"SETI likes a bigger cache -
you'll probably find it works
better with a larger cache, even
if it is slower. If it overflows a
256K cache, but not a 512K cache,
it will have to make a lot of hits
to main memory, which is going to
take a lot of clock ticks with a
7x clock ratio."
"I
can perhaps help you with the
Lancewood mystery," Dean
Johnson says. "I have a SGI
1200 with dual 700e's and 1Gb of
memory and most of the time it is
running SETI@Home, for which I
have the source because I am on
the porting team.
"Under Linux, the SETI@Home
client uses about 13Mb of memory,
so the overall memory isn't an
important thing. The key, however,
is the size of the cache.The data
for a Seti work unit is about
350K, so the difference between
smaller and larger caces is huge
due to the poorly optimised FFT
(fast fourier transform) that eats
up most of the CPU time. For
instance, A PII 350 is twice as
fast as a Celeron 466.
So if you're manipulating large
wodges of data, you're better off
with an old 500MHz Katmai PIII
than a shiny new 700+MHz
Coppermine..."
Draw your
own conclusions: if you intend
buying something for seti, better
to o/c the fsb on your present
crate than fork out dosh for a
faster shiny new proc. Well that's
my poor mans thought anyway. Night
all. Max out.
Just!
Did
you spot the deliberate mistake on
the results - well
I didn't until they were up!
Perhaps I should
have let the nameless version stay
to remove the ego element from the
results but where's the fun in
that? So accept my apologies for
leaving out the one really
important column ie your names and
rest assured that I have ordered a
tall glass of Hemlock for
breakfast. Will explain personnel
changes soon but better get this
up rather than gas. Max out.
An
Update!
Rat
here, just thought I'd introduce
Max to you all. Max has been
active in the background of the
page, sending in all sorts of cool
info that he digs up. Max also
volunteered his services to help
out with the page, as I don't have
enough time to do everything. I'm
hoping to be able to spend more
time than I have, but we'll see
what happens. I think that with
Max taking some of the load off,
I'll be able to expand some, and
do some things that I've been
meaning to do, like update the
speed tips page with all the
latest info. -Rat
Ps- I just noticed the lack of
names in the table. Oops. :)
Life!
My god there is life on
this page after all...I'm sure
there are some new words to
ingest. RB is extremely busy with
life in general and babies in
particular so things might take a
while to get rolling. He is also
trying to explain the intricacies
of web page management and
construction by remote control
because I was fool enough to offer
a little time to help. there is
still plenty of room for someone
with serious knowledge to reply to
his job advert of a few days back.
An updated table will appear
soon. Which means when I have
learnt enough html/XL/Fpx, not to
mention patience, to do a job
worthy of what has gone before. Or
perhaps you number-hungry people
would rather a disjointed mess but
with your times on!! I have tried
to reduce the lumpiness of the
comments by pruning a little
harder while maintaining their
accuracy (!) and intent.
Errors/corrections/useful
criticism always welcome and on
slow days all things considered.
There are numerous new entries
(20+) and probably a shed full
more to come...obviously some
people have been either very busy
benching for glory or very
slothful at work (or both)-
stylish. RB has commented on
several of these new times already
and in the words of the master I
urge you to find the new ones for
yourself. I am not suitably
qualified to compare one blatting
overstretched mobo against another
at present. But there is one very
iteresting item at the top off the
tree - say no more! And to those
who submit gentler paced times you
work is appreciated. Someone,
somewhere finds this useful.
On the list of requests comes a
call to Schmo to give a little
more detail about that Xeon time
and setup - thanks.
Max out.
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