Author: Eugene Nalimov
Date: 13:44:40 02/19/03
Go up one level in this thread
On February 19, 2003 at 16:26:06, Robert Hyatt wrote:
>On February 19, 2003 at 13:29:05, Eugene Nalimov wrote:
>
>>Andrew Kadatch (who wrote TB compression/decompression code) wrote small program
>>that tries to overheat some part of the CPU. I asked him, and he gave his
>>permission to put Windows executable into some FTP server -- actually it was
>>somewhere in the Web for some time. We can put it on Bob's server if that's Ok
>>for Bob.
>>
>>Warning: that program actually burned several overclocked CPUs :-)
>>
>>Thanks,
>>Eugene
>
>I put it in /pub/hyatt/warmup.zip, for anyone interested in running it.
>
>:)
To better stress relevant part of CPU run it for several hours with reasonable
amount of memory, e.g.
warmup.exe 4m
Thanks,
Eugene
>>
>>On February 19, 2003 at 11:38:28, Robert Hyatt wrote:
>>
>>>On February 18, 2003 at 23:39:18, Aaron Gordon wrote:
>>>
>>>>Hyatts box benchmarks a little over 2 million nodes/sec in the crafty benchmark.
>>>>Hyatt, I know you say you get 2.5 million but in all the games you've played
>>>>online where you've kibbed your nodes/sec you've ALWAYS been just over 2 million
>>>>(2050-2150kn/s most of the time). Also, about a dual P4-3.06 + HT getting 3
>>>>million nodes/sec. Not going to happen (Possible in the endgame with almost no
>>>>pieces). My AthlonXP 2100+ overclocked to 2.44GHz gets a little over 1.5 million
>>>>nodes/sec in crafty and I've seen over 2 million in end-games. Enricos 2400+ @
>>>>2.52GHz gets almost 1.6 million in crafty.
>>>
>>>Here are some numbers from a game just played:
>>>
>>> time=3:47 cpu=398% mat=-2 n=532216437 fh=93% nps=2343k
>>> time=4:25 cpu=399% mat=-2 n=615322858 fh=92% nps=2316k
>>> time=2:52 cpu=399% mat=-2 n=381723163 fh=93% nps=2215k
>>> time=3:12 cpu=398% mat=-2 n=432413276 fh=92% nps=2243k
>>> time=3:39 cpu=398% mat=-2 n=509021660 fh=90% nps=2317k
>>> time=2:01 cpu=399% mat=-2 n=280114908 fh=90% nps=2303k
>>> time=1:49 cpu=399% mat=-2 n=248735781 fh=90% nps=2273k
>>> time=2:53 cpu=398% mat=-3 n=403103259 fh=90% nps=2324k
>>> time=2:52 cpu=399% mat=-3 n=400323062 fh=90% nps=2321k
>>> time=1:49 cpu=399% mat=0 n=259262534 fh=90% nps=2373k
>>> time=1:48 cpu=398% mat=0 n=268405707 fh=91% nps=2479k
>>> time=4:20 cpu=398% mat=-1 n=625737329 fh=91% nps=2405k
>>> time=2:15 cpu=397% mat=-1 n=333429338 fh=92% nps=2457k
>>> time=1:47 cpu=398% mat=-1 n=259890267 fh=92% nps=2418k
>>> time=1:24 cpu=397% mat=0 n=204315540 fh=94% nps=2408k
>>> time=1:29 cpu=396% mat=-3 n=218637842 fh=94% nps=2454k
>>> time=1:19 cpu=398% mat=-1 n=191197121 fh=93% nps=2415k
>>> time=1:17 cpu=398% mat=2 n=185866947 fh=92% nps=2404k
>>> time=1:49 cpu=398% mat=1 n=266422638 fh=93% nps=2434k
>>> time=1:12 cpu=397% mat=1 n=176503700 fh=93% nps=2427k
>>> time=1:10 cpu=398% mat=1 n=167575005 fh=93% nps=2360k
>>> time=1:09 cpu=398% mat=1 n=171500968 fh=95% nps=2479k
>>> time=1:44 cpu=398% mat=1 n=254712457 fh=94% nps=2429k
>>> time=1:05 cpu=396% mat=1 n=159894553 fh=94% nps=2448k
>>> time=57.20 cpu=397% mat=1 n=135742820 fh=94% nps=2373k
>>> time=1:02 cpu=398% mat=1 n=147915710 fh=94% nps=2374k
>>> time=3:49 cpu=397% mat=1 n=593274205 fh=97% nps=2581k
>>> time=2:16 cpu=397% mat=1 n=351235842 fh=94% nps=2565k
>>> time=3:59 cpu=398% mat=1 n=608866251 fh=94% nps=2545k
>>> time=1:04 cpu=398% mat=1 n=165807816 fh=94% nps=2575k
>>> time=17.53 cpu=395% mat=-4 n=44183665 fh=95% nps=2520k
>>> time=1:20 cpu=394% mat=0 n=195342773 fh=93% nps=2434k
>>>
>>>
>>>So, there _are_ a bunch of 2.5M numbers in there. Before castling, crafty is
>>>almost
>>>always under 2M, after castling, it varies. 2.5M is less frequent when I have
>>>endgame
>>>tables turned on as I always do, but if I turn them off in endgames, it can
>>>reach beyond
>>>3.0M.
>>>
>>>As I have said _often_ there is no one NPS value that is correct. I usually
>>>refer to 2.5M
>>>as the typical number in the middlegame, which is fairly close. If you want to
>>>argue it
>>>should be 2.4M, you have a point. If you want to argue it should be 2.0 because
>>>of the
>>>opening, that is also a point. But in middlegame positions, such as those in
>>>test suites,
>>>Here are a couple of outputs:
>>>
>>>WAC:
>>>average search depth.............. 4.9
>>>nodes per second.................. 2408280
>>>
>>>ECM (subset):
>>>average search depth.............. 7.3
>>>nodes per second.................. 2521680
>>>
>>>So the numbers make reasonable sense to talk about 2.4M-2.5M.
>>>
>>>As far as your overclocking stuff goes, feel free to do it. I take the results
>>>with a
>>>grain of salt, because I understand things like "settling time". I once spent
>>>two weeks
>>>debugging a problem on an AMD machine that was overclocked (I did not know it at
>>>the time). I then discovered the program ran _perfectly_ on an intel box I had,
>>>but would
>>>fail after several hours on the AMD. I reset everything to factory specs and
>>>the program
>>>ran fine on the AMD as well.
>>>
>>>Circuits have a distinct "settling time" that varies depending on inputs and
>>>other things. If
>>>you cut the clock cycle time so that this circuit settles almost all the time,
>>>before the clock
>>>edge falls, then you will get right answers almost all the time. But there are
>>>those rare
>>>exceptions where bogus results pop out, and I don't want them in _my_ program.
>>>I don't
>>>care _how_ well it is tested, unless you do an _exhaustive test_ (impossible)
>>>there is always
>>>room for doubt...
>>>
>>>I want solid results...
>>>
>>>Feel free to use any NPS number you want. My 2.5M is pretty close to normal for
>>>most of the game, and it can go up above that without 200 gigs of 6 man egtb
>>>tables.
>>>
>>>
>>>>
>>>>There are *NO* P4 chips available that can match this, including a P4-3.06 Xeon
>>>>+ HT. Those get around 1.3 million WITH HT in crafty. If you do a 1.3 million *
>>>>1.8 you come out to 2.34 million nodes/sec. Far cry from 3 million nodes/sec.
>>>>
>>>>How much did MY box cost? $97 for the chip, $80 for the board. $75 for the ram,
>>>>etc. Not much at all.
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