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Do not adjust Minimum Split Depth automatically

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Currently minimum split depth is set automatically to 6
when number of CPUs is more than 4. I believe this is a bad
idea since for example my quad (4CPU with hyperthreading) is
detected as 8CPU computer. I've manually lowered down the number
of Threads, but so far I have played all games with Minimum
Split Depth set to 6!

Since 4CPU computers with hyperthreading are quite common and
8 CPU computers extremely rear (I expect we can get a direct
jump to 16 or 32 cores), this automatic adjusting is likely
to do more harm than good. Add a note in Readme.txt, so that
those rear 8CPU owners can manually tweak the "Minimum Split
Depth" parameter

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski
2009-07-24 17:34:41 +03:00
committed by Marco Costalba
parent 5b3fcab1ad
commit 5be3d98d17
2 changed files with 3 additions and 10 deletions
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9
src/ucioption.cpp
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@@ -194,15 +194,6 @@ void init_uci_options() {
options["Threads"].defaultValue = stringify(Min(cpu_count(), 7));
options["Threads"].currentValue = stringify(Min(cpu_count(), 7));
// Increase the minimum split depth when the number of CPUs is big.
// It would probably be better to let this depend on the number of threads
// instead.
if (cpu_count() > 4)
{
options["Minimum Split Depth"].defaultValue = "6";
options["Minimum Split Depth"].currentValue = "6";
}
}