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Subject: Re: How well do today's "Deep" engines scale?

Author: Joachim Rang

Date: 12:04:38 07/19/05


>
>Please post the nodes per second for 1 and more threads obtained when searching
>the below position for around 60 seconds.

nodes per second? There is no worse indicator how well a program scale than
nodes per second. It is easy to achieve perfect scalablity by simply letting all
threads calculating the same.

To measure scalability one has to invest quite an effort. The Hydra-Team does it
with a special testsuites which take about 24hours to run. The cheap approach
would be:

Take 10 positions and note the timetodpth for depth say 18. Than calculate the
average timetodept18 and compare.

Even that approach is not perfect since a 18ply-search on a single processor has
a different quality than on a dual.

regards Joachim

Re: How well do today's "Deep" engines scale? Vincent Diepeveen 15:29:16 07/19/05
- Re: How well do today's "Deep" engines scale? Robert Hyatt 08:45:45 07/20/05
Re: How well do today's "Deep" engines scale? Anson T J 13:34:57 07/19/05
- Re: How well do today's "Deep" engines scale? Robert Hyatt 17:34:32 07/19/05
  - Re: How well do today's "Deep" engines scale? Anson T J 04:02:52 07/20/05
    - Re: How well do today's "Deep" engines scale? Robert Hyatt 08:38:15 07/20/05
  - Re: How well do today's "Deep" engines scale? Mridul Muralidharan 01:17:08 07/20/05
    - Re: How well do today's "Deep" engines scale? Robert Hyatt 08:38:44 07/20/05
- Re: How well do today's "Deep" engines scale? Andreas Guettinger 14:05:50 07/19/05
  - Re: How well do today's "Deep" engines scale? Anson T J 14:58:48 07/19/05
    - Re: How well do today's "Deep" engines scale? Joachim Rang 01:43:29 07/20/05
    - Re: How well do today's "Deep" engines scale? Gian-Carlo Pascutto 22:57:21 07/19/05

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