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[Bug-gnubg] Fwd: Fwd: Optimizing thread settings


From: Ian Shaw
Subject: [Bug-gnubg] Fwd: Fwd: Optimizing thread settings
Date: Mon, 2 May 2011 11:48:57 +0100



On 21 April 2011 17:01, Christian Anthon <address@hidden> wrote:
The evaluation speed tool always sucked, and it sucks twice with
threads. Do a rollout of some kind with a constant seed to test the
speed.


Thanks for the explanation, Christian.

Rollout results match up more to my initial expectations (see below). Asking for more threads than the 8 available does not improve speeds. Performance tails off as the number of threads approaches the maximum. I put this down to a combination of: priority set to "idle", other tasks being run on the computer, the OS overhead, the thread-management overhead.

If the speed evaluation is broken, I suggest it be removed from the menu until it is fixed (if ever).

Cheers,
Ian


Rollout of inital 43: 13/9 13/10 1296 trials on "expert" settings.
Position ID: 4HPwATDgc/ABMA
Match ID: cAkOAAAAAAAA

Threads  Time (sec)
  1      252
  2      129
  4       73
  6       57
  7       54
  8       53
  9       52
 10       52
 16       53
 



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