Author: Andrew Williams
Date: 03:50:18 04/25/00
Go up one level in this thread
On April 25, 2000 at 05:59:45, Bas Hamstra wrote: >On April 25, 2000 at 01:33:45, Tom Kerrigan wrote: > >>On April 25, 2000 at 01:32:48, Tom Kerrigan wrote: >> >>>On April 25, 2000 at 01:20:11, Bas Hamstra wrote: >>> >>>>(Currently I myself have started all over trying to make a really fast rotated >>>>BB program. Looks promising so far: make/unmake=2M/sec and movegeneration=12M >>>>moves/sec on a Celeron 466) >>> >>>My program does gen/make/unmake at 2M/sec, and just gen at ~10M/sec. >>> >>>I'm not using any sort of bitboards. >>> >>>Maybe something to consider... >>> >>>-Tom >> >>Whoops, forgot to mention that I have a Celeron/400. >>-Tom > >I am not very familiar with these type of statistics. What exactly does that >"gen/make/unmake" mean? Gen all moves and then making/unmaking each? But what >does it SAY..? I am afraid not much for my type of program. Here is why. > >- I have distinct functions gencaps() and gennoncaps() >- Profiler says caps() is called 10x as much called as noncaps() >- So 90% the time all the work of gen() is only to find a capture that gives a >cutoff. Regardless if you distinct them or not. > >So you can maybe extremely fast gen+make+unmake all moves. But what *I* want to >know is "how many times/sec" can I do a capgen(), since that has to be done >practically *every* node. > >And since it don't seem to matter a lot timewise if I generate 3 or 5 captures, >I simply measure the above TotalCapGens/sec. Maybe we can compare (same hardware >anyway): > >after e4 e5 Nf3 Nf6 Nc3 Nc6 Bc4 Bc5 > >I can do a CaptureGen() 800k times a second. I am interested in what others >have, especially 0x88 and non-rotated BB programs. > > >Regards, >Bas Hamstra. Hi The fen string for the position you describe is: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 0 5 PostModernist is a 0x88 program, but it keeps up-to-date 32-bit attack records, which it uses for capture generation (amongst other things). PM can call generate_captures 510k times per second on a PIII-450 in this position. I'd be very interested in other programs' performances. Andrew
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