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Depth margin parameter-tweak in TT-save

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Verified that is improvement with multiple threads:

LLR: 2.95 (-2.94,2.94) [0.00,4.00] sprt @ 30+0.3 th 3
Total: 14817 W: 2103 L: 1915 D: 10799

LLR: 2.96 (-2.94,2.94) [0.00,4.00] sprt @ 15+0.15 th 7
Total: 10264 W: 1498 L: 1321 D: 7445

Verified that is not a significant regression with a single thread:

LLR: 2.96 (-2.94,2.94) [-4.00,0.00] sprt @ 60+0.6 th 1
Total: 23975 W: 3294 L: 3210 D: 17471

Resolves #575
This commit is contained in:
Guenther Demetz 2016-01-13 14:24:52 +01:00 • committed by Joona Kiiski
parent ebec2fa48e
commit 12eb345ebd
1 changed files with 1 additions and 1 deletions
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src/tt.h
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@ -50,7 +50,7 @@ struct TTEntry {
// Don't overwrite more valuable entries
if ( (k >> 48) != key16
|| d > depth8 - 2
|| d > depth8 - 4
/* || g != (genBound8 & 0xFC) // Matching non-zero keys are already refreshed by probe() */
|| b == BOUND_EXACT)
{