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Does anybody know the exact difference between sched_yield() and usleep(0) or in windows Sleep(0) and SwitchToThread()? I don't know about Linux, but there's an attempt to recreate open source version of Windows (including kernel) called ReactOS. I'm not sure how much it resembles Windows kernel/sc...

Pawn cache helps, no doubt about that, I use it as well in my tuner. Your numbers indicate a speedup of 8% ((71.1-65.4)/71.1) for enabling eval cache. Ok, measurable at least but we can agree on the "not so stellar" :-) I think we can agree that the speedup would be 9% if you round properly :) Anyw...

But we came from the question whether eval cache may help for texel tuning, and here I still believe that it has no measurable influence if I assume that duplicate positions with different game results do occur as an exception only, and with mostly unique positions and cache clearing after each par...

I do not understand how an eval cache can help to speed up texel tuning. It depends on what positions you use, since I extracted the positions from actual self-play games, they weren't actually "random" positions but rather naturally sorted as the individual games progressed, that's why eval cache ...

I think using eval cache when tuning is an error, each time you modify a term and call the evaluator you will get the cached value instead of the new value. The same holds for quiescence, if you use TT pruning in quiescence you have to disable it. Not at all, you clear it before each iteration, so ...

I don't remember the times but IIRC eval cache helps a ton. Of course you want to parallelize as well.
Texel tuning is very fast because you don't have to play actual games.

Just wow. Congratulations!

I'm quite familiar with hyperthreading. My concerns remain. :D Indeed, this shows the incompetence of the organizers by not understanding the difference between a logical and a physical core. I guess nobody even bothered to measure NPS ponder off vs ponder on (assuming running on the same machine),...

Werewolf wrote: ↑

Sat Aug 18, 2018 8:10 pm

20 game match

What do you expect to get from 20 games except noise?

First of all, you don't have to read the whole book into memory, a waste of RAM and CPU resources, just as others pointed out already. Back to your (assume binary) book reader. A couple of things: 1) use unordered_map instead of map, I got 1.5x perf boost 2) in ReadBinary book you reconstruct the po...