Author: Robert Hyatt
Date: 11:55:15 11/08/03
Go up one level in this thread
On November 05, 2003 at 18:57:08, Eugene Nalimov wrote:
>On November 05, 2003 at 18:17:03, Robert Hyatt wrote:
>
>>On November 05, 2003 at 16:41:51, Eugene Nalimov wrote:
>>
>>>On November 05, 2003 at 09:54:13, Robert Hyatt wrote:
>>>
>>>>On November 05, 2003 at 05:22:16, Ed Schröder wrote:
>>>>
>>>>>If you the choice between:
>>>>>
>>>>>1) AMD Opteron 244, 1.8 Ghz, S-940 Box
>>>>>
>>>>>and:
>>>>>
>>>>>2) AMD MP 2600+, 266Mhz
>>>>>
>>>>>then what would be the best choice regarding speed.
>>>>>
>>>>>I wonder...
>>>>>
>>>>>Ed
>>>>
>>>>for me, I'd take the opteron.
>>>>
>>>>Crafty gets about 2M nps on a 1.8ghz opteron... single processor.
>>>
>>>Not exactly. Following are 2 log files from (new version of) Crafty running on
>>>1.8GHz quad Opteron system. Run time vary from run to run, but those are typical
>>>ones
>>>
>>>1 CPU: 1,762knps
>>>4 CPUs: 6,856knps
>>
>>OK... I had done the calculation wrong. I thought that 6.8M for 4 was
>>basically 3.2X faster than 1, due to the NUMA scaling issues. It looks
>>from the above that it is now scaling almost 4:1 which is great. :)
>>
>>Now if my dual xeon would just scale 2.0 :)
>
>What is current number? I believe we improved it when you made some global
>per-thread one, no?
>
>Thanks,
>Eugene
Looks better (I just tested.) Seems to be back to the magic
1.9X (raw NPS is 1.9X faster with two processors than with
1.
Here's the raw data.
one cpu:
time=1:25 cpu=99% mat=0 n=85541805 fh=91% nps=998k
time=55.41 cpu=99% mat=0 n=62193826 fh=95% nps=1122k
time=1:40 cpu=99% mat=-1 n=89355667 fh=94% nps=886k
time=1:18 cpu=99% mat=0 n=82339318 fh=92% nps=1050k
two cpus (SMT off):
time=49.12 cpu=198% mat=0 n=91626204 fh=91% nps=1865k
time=27.55 cpu=198% mat=0 n=58868942 fh=95% nps=2136k
time=1:00 cpu=198% mat=-1 n=101092946 fh=94% nps=1669k
time=45.56 cpu=197% mat=0 n=89351627 fh=92% nps=1961k
four cpus (SMT on):
time=50.32 cpu=392% mat=0 n=105665041 fh=91% nps=2099k
time=23.92 cpu=388% mat=0 n=57409674 fh=95% nps=2400k
time=57.60 cpu=392% mat=-1 n=108568676 fh=93% nps=1884k
time=40.88 cpu=396% mat=0 n=91017384 fh=92% nps=2226k
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