I'm in the final stages of finishing the TCEC hardware upgrade.
I got a mail from a computer chess fan asking about why I was disabling hyperthreading. I have done so because "I've read it's not beneficial for computer chess".
Well, here's my tests (12 threads & 6 threads run twice each with the same results).
The hyperthreaded version gives higher np/s, 33.6 Mnps vs 31.3 Mnps... so why don't we want to use hyperthreading?
1 result posted for 6 threads and 12 threads:
Code: Select all
Crafty v23.3 JA (6 cpus)
White(1): setboard 4r1k1/pnbq1pp1/1p5p/2pP1b2/2P5/1PQ1BN1P/P2N1PP1/3R2K1 b -
Black(1): display
+---+---+---+---+---+---+---+---+
8 | | . | | . |<R>| . |<K>| . |
+---+---+---+---+---+---+---+---+
7 |<P>|<N>|<B>|<Q>| . |<P>|<P>| |
+---+---+---+---+---+---+---+---+
6 | |<P>| | . | | . | |<P>|
+---+---+---+---+---+---+---+---+
5 | . | |<P>|-P-| . |<B>| . | |
+---+---+---+---+---+---+---+---+
4 | | . |-P-| . | | . | | . |
+---+---+---+---+---+---+---+---+
3 | . |-P-|-Q-| |-B-|-N-| . |-P-|
+---+---+---+---+---+---+---+---+
2 |-P-| . | |-N-| |-P-|-P-| . |
+---+---+---+---+---+---+---+---+
1 | . | | . |-R-| . | |-K-| |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Black(1): st 180
search time set to 180.00.
Black(1): display stats
display statistics at end of each search.
Black(1):
Black(1): go
time surplus 0.00 time limit 3:00 (+0.00) (3:00)
depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
9-> 0.01 0.71 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bd2 Bd6 5. Kf1 Qf5 (s=4)
10 0.03 0.70 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Nd2 Be5 5. Qc1 Bd3 6. Nf3 (s=3)
10-> 0.03 0.70 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Nd2 Be5 5. Qc1 Bd3 6. Nf3
11 0.04 0.72 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bc1 Bd6 5. Bb2 f6 6. Kf1 Qf5
11-> 0.04 0.72 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bc1 Bd6 5. Bb2 f6 6. Kf1 Qf5 (s=2)
12 0.06 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
12-> 0.08 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
13 0.09 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
Bf5
13-> 0.11 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
Bf5
14 0.12 0.71 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Qf5 6. Qc3 h5 7. Kh1
Kh8 8. a3
14-> 0.14 0.71 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Qf5 6. Qc3 h5 7. Kh1
Kh8 8. a3
15 0.25 0.68 1. ... Nd6 2. Re1 Bh7 3. Nf1 Nf5 4.
Bd2 Rxe1 5. Bxe1 Bd6 6. Ne3 Qe7 7.
Bd2 Qe4 8. Nxf5 Qb1+ 9. Bc1 Bxf5
15-> 0.28 0.68 1. ... Nd6 2. Re1 Bh7 3. Nf1 Nf5 4.
Bd2 Rxe1 5. Bxe1 Bd6 6. Ne3 Qe7 7.
Bd2 Qe4 8. Nxf5 Qb1+ 9. Bc1 Bxf5
16 0.39 0.63 1. ... Nd6 2. Re1 Bh7 3. Nf1 Nf5 4.
Bc1 Rxe1 5. Qxe1 Nd4 6. Nxd4 cxd4 7.
Bb2 d3 8. Nd2 Bd6 9. Be5
16-> 0.43 0.63 1. ... Nd6 2. Re1 Bh7 3. Nf1 Nf5 4.
Bc1 Rxe1 5. Qxe1 Nd4 6. Nxd4 cxd4 7.
Bb2 d3 8. Nd2 Bd6 9. Be5
17 0.65 0.68 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Ne4 5. Qb2 Bd6 6. Nhf3 f6 7. Kh2
Nxd2 8. Qxd2 Be4 9. Qf2 Qf5
17-> 0.73 0.68 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Ne4 5. Qb2 Bd6 6. Nhf3 f6 7. Kh2
Nxd2 8. Qxd2 Be4 9. Qf2 Qf5
18 1.03 0.63 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Ne4 5. Qc1 Bd6 6. Nhf3 Bg6 7. Ne5
Bxe5 8. fxe5 Rxe5 9. Bf4 Re8 10. Nxe4
Bxe4
18-> 1.10 0.63 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Ne4 5. Qc1 Bd6 6. Nhf3 Bg6 7. Ne5
Bxe5 8. fxe5 Rxe5 9. Bf4 Re8 10. Nxe4
Bxe4
19 2.26 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Qb2
Bd3 8. Qc3 Bf5 9. Kh1 Bg6 10. Qb2 Bf5
19-> 2.56 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Qb2
Bd3 8. Qc3 Bf5 9. Kh1 Bg6 10. Qb2 Bf5
20 3.12 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
Bh5 8. Re2 Bg6 9. Qa4 Kf8 10. Re1 Bd3
11. Qb5
20 4.54 -1 1. ... Bxh3!
20 5.91 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
20-> 5.91 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1 (s=2)
21 6.47 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
21-> 6.61 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
22 7.58 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
22-> 7.73 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
23 9.65 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
23-> 9.87 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
24 13.29 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
24-> 13.74 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
25 19.95 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
25-> 20.70 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
26 32.73 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
26-> 34.11 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
27 56.19 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
27-> 1:00 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
28 1:45 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
28-> 1:49 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Re1 f5
4. Qc1 Qg4+ 5. Kf1 Qh3+ 6. Kg1
time=3:00 mat=1 n=5642234513 fh=90% nps=31.3M
extensions=92.6M qchecks=228.7M reduced=803.6M pruned=1934.2M
predicted=0 evals=1429.7M 50move=0 EGTBprobes=0 hits=0
SMP-> splits=392566 aborts=38532 data=37/65536 elap=3:00
terminating SMP processes.
Black(1): Bxh3
time used: 3:00
Code: Select all
Crafty v23.3 JA (12 cpus)
White(1): setboard 4r1k1/pnbq1pp1/1p5p/2pP1b2/2P5/1PQ1BN1P/P2N1PP1/3R2K1 b -
Black(1): display
+---+---+---+---+---+---+---+---+
8 | | . | | . |<R>| . |<K>| . |
+---+---+---+---+---+---+---+---+
7 |<P>|<N>|<B>|<Q>| . |<P>|<P>| |
+---+---+---+---+---+---+---+---+
6 | |<P>| | . | | . | |<P>|
+---+---+---+---+---+---+---+---+
5 | . | |<P>|-P-| . |<B>| . | |
+---+---+---+---+---+---+---+---+
4 | | . |-P-| . | | . | | . |
+---+---+---+---+---+---+---+---+
3 | . |-P-|-Q-| |-B-|-N-| . |-P-|
+---+---+---+---+---+---+---+---+
2 |-P-| . | |-N-| |-P-|-P-| . |
+---+---+---+---+---+---+---+---+
1 | . | | . |-R-| . | |-K-| |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Black(1): st 180
search time set to 180.00.
Black(1): display stats
display statistics at end of each search.
Black(1): go
time surplus 0.00 time limit 3:00 (+0.00) (3:00)
depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
starting thread 8
starting thread 9
starting thread 10
starting thread 11
9-> 0.23 0.71 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bd2 Bd6 5. Kf1 Qf5 (s=4)
10 0.23 0.70 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Nd2 Be5 5. Qc1 Bd3 6. Nf3 (s=3)
10-> 0.24 0.70 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Nd2 Be5 5. Qc1 Bd3 6. Nf3
11 0.26 0.72 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bc1 Bd6 5. Bb2 f6 6. Kf1 Qf5
11-> 0.28 0.72 1. ... Nd6 2. Re1 Ne4 3. Nxe4 Bxe4
4. Bc1 Bd6 5. Bb2 f6 6. Kf1 Qf5
12 0.29 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
12-> 0.31 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
13 0.34 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
Bf5
13-> 0.35 0.74 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N1d2 Nf6 6. Qa3 a5 7. Kh1
Bf5
14 0.39 0.71 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Qf5 6. Qc3 h5 7. Kh1
Kh8 8. a3
14-> 0.40 0.71 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Qf5 6. Qc3 h5 7. Kh1
Kh8 8. a3
15 0.54 0.78 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Bf5 <HT>
15-> 0.70 0.78 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
Qc1 Bd3 5. Nhf3 Bf5 <HT>
16 0.82 0.73 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N3d2 Nf6 6. Qa3 a5 7. Ng3
Bd3 8. Nf3 Kh8 9. Kh1
16-> 0.87 0.73 1. ... Nd6 2. Re1 Bg6 3. Nf1 Ne4 4.
Qc1 Qd6 5. N3d2 Nf6 6. Qa3 a5 7. Ng3
Bd3 8. Nf3 Kh8 9. Kh1
17 1.13 0.63 1. ... Nd6 2. Re1 Bg6 3. Nf1 Nf5 4.
Bd2 Rxe1 5. Bxe1 Qe8 6. Ne3 Bd6 7.
Bd2 Qe4 8. Nxf5 Qb1+ 9. Qc1 Qxc1+ 10.
Bxc1 Bxf5
17-> 1.18 0.63 1. ... Nd6 2. Re1 Bg6 3. Nf1 Nf5 4.
Bd2 Rxe1 5. Bxe1 Qe8 6. Ne3 Bd6 7.
Bd2 Qe4 8. Nxf5 Qb1+ 9. Qc1 Qxc1+ 10.
Bxc1 Bxf5
18 1.52 0.64 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Re7 5. a3 Ne4 6. Qb2 Bd6 7. Nhf3
Nxd2 8. Qxd2 Be4 9. Ne5 Qf5 10. Qc3
Bxe5 11. fxe5 Rxe5
18-> 1.62 0.64 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Re7 5. a3 Ne4 6. Qb2 Bd6 7. Nhf3
Nxd2 8. Qxd2 Be4 9. Ne5 Qf5 10. Qc3
Bxe5 11. fxe5 Rxe5
19 1.96 0.68 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Re7 5. a3 Ne4 6. Nxe4 Bxe4 7. Bd2
Bd6 8. Nf3 Qc7 9. Ne5 Bxe5 10. fxe5
Rxe5
19-> 2.26 0.68 1. ... Nd6 2. Re1 Bg6 3. Nh4 Bh7 4.
f4 Re7 5. a3 Ne4 6. Nxe4 Bxe4 7. Bd2
Bd6 8. Nf3 Qc7 9. Ne5 Bxe5 10. fxe5
Rxe5 (s=2)
20 3.40 0.72 1. ... Nd6 2. Re1 Bg6 3. Nf1 Nf5 4.
Bc1 Rxe1 5. Qxe1 Nd4 6. N1d2 Nc2 7.
Qe2 Nd4 8. Nxd4 cxd4 9. Bb2 d3 10.
Qg4 Qxg4 11. hxg4
20 5.63 -1 1. ... Bxh3!
20 6.70 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
20-> 6.70 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1 (s=2)
21 7.45 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
21-> 7.76 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
22 8.89 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
22-> 9.00 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
23 11.17 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
23-> 11.40 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
24 15.07 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
24-> 15.47 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
25 23.22 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
25-> 23.89 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
26 39.60 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
26-> 40.76 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
27 1:06 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
27-> 1:08 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
28 1:50 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
28-> 1:57 -0.01 1. ... Bxh3 2. gxh3 Qxh3 3. Qa1 f5
4. Re1 Bd6 5. b4 Qg4+ 6. Kf1 f4 7.
Bxc5 Qh3+ 8. Kg1 Qg4+ 9. Kf1
time=3:00 mat=1 n=6063685482 fh=89% nps=33.6M
extensions=117.0M qchecks=296.0M reduced=786.2M pruned=2007.2M
predicted=0 evals=1597.7M 50move=0 EGTBprobes=0 hits=0
SMP-> splits=1802696 aborts=205825 data=116/65536 elap=3:00
terminating SMP processes.
Black(1): Bxh3
time used: 3:00