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Speeding up GNU Rollouts - Update/Fix

Posted By: Stick
Date: Sunday, 6 October 2024, at 7:21 p.m.

In Response To: Speeding up GNU Rollouts (Stick)

So as I said in my first post, I hadn't tried to resolve the issue on my own at all when I posted. Luckily, the fix was as easy as one could hope once I took a glance.

First, GNU also has a calibration tool which I never knew it had. (Analysis >> Evaluation Speed) I don't know if it has been there all along and I never saw it (doubtful) or it was added at some point over the years and I didn't notice (likely). When I first used the tool it clocked in at around 330,000 static evaluations/second. After the fix it clocked in at around 4,200,000 static evaluations/second.

As Philippe Michel said, it's only an option we need to change. Navigate to Settings >> Options >> Other >> Eval. Threads and change that number from the default, 1, to whatever you like. I changed it to 32.

To test it out further I took a simple end game position that we just saw in one of the PotD and rolled it out again. This position, XGID=-Ia-E----a--aa-----bcbbbA-:2:1:1:62:0:0:3:0:10, took under 15 seconds with XG for a 1296 trial run w/3 ply/XGR. With GNU before I switched the number of threads used on 2 ply/2 ply it took ~25 minues. After the fix it took 1 minute 30 seconds. So a massive improvement. Still not XG speed but hey, I can live with that.

Stick

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