Hi all, perhaps someone can reproduce the following behavior With latest Stockfish Development and Large Pages in Windows.
While analyzing the position below, I noticed that, after about 15 minutes, the nps drops signifcantly. At that same moment, CPU power consumption drops to half, but utilisation en clockspeed remains the same.
Anyone willing to give this a test?
[d]8/2N4r/1p3pkp/8/5K1p/2P4N/P3Bn2/8 w - -
Engine: Stockfish x64 popcnt (20480 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.
62/99 10:40 -2.59 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rc1 8.Be4+ Kf7
9.Bf3 h3 10.Bxh5+ Ke7 11.Nf5+ Kd7
12.Kg3 Rxc3+ 13.Kh2 Ke6 14.Ng3 (20.018.442.347) 31267
TB:179.596.992
63/51 11:17 -2.69-- 1.Nxf2 Rxc7 (21.200.940.226) 31277
TB:189.878.340
63/51 12:17 -2.79-- 1.Nxf2 Rxc7 (23.063.995.234) 31291
TB:207.247.666
63/51 12:38 -2.94-- 1.Nxf2 Rxc7 (23.725.912.398) 31296
TB:213.213.982
63/51 23:01 -3.15-- 1.Nxf2 Rxc7 (28.947.134.583) 20957
TB:245.141.050
63/96 31:34 -2.98++ 1.Nxf2 (30.091.633.400) 15879
TB:251.592.679
63/96 32:14 -3.15 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (30.172.163.900) 15597
TB:251.993.972
64/39 32:46 -3.05++ 1.Nxf2 (30.238.749.709) 15373
TB:252.345.944
64/42 32:55 -2.95++ 1.Nxf2 (30.256.040.554) 15316
TB:252.419.032
64/84 33:09 -2.80++ 1.Nxf2 (30.284.338.589) 15225
TB:252.556.829
64/84 33:27 -3.12 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (30.322.051.641) 15107
TB:252.752.225
65/91 52:32 -3.16 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (32.775.465.448) 10395
TB:266.602.174
66/91 93:28 -3.16 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (36.707.573.812) 6545
TB:295.057.746
67/100 97:11 -3.16 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (37.206.905.230) 6380
TB:299.348.002
68/96 116:00 -3.16 1.Nxf2 Rxc7 2.Nd1 h5 3.a4 Rd7 4.Ne3 Rd2
5.Bf3 Rf2 6.Nd5 Rf1 7.Ne3 Rg1 8.Bg2 Ra1
9.Bc6 Kf7 10.Bd7 Ke7 11.Bb5 Ke6
12.Kf3 Rc1 13.Nc4 Rxc3+ 14.Kg2 (39.633.848.067) 5694
TB:320.906.704
Strange behavior when analyzing
Moderators: hgm, Rebel, chrisw
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Strange behavior when analyzing
This post may either be cause or result of misunderstandings.
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- Posts: 352
- Joined: Thu Mar 09, 2006 6:00 pm
Re: Strange behavior when analyzing
The issue only happpens when Large Pages are being used.One can check tis with i.e. RAMmap.
This post may either be cause or result of misunderstandings.
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- Full name: Louis Zulli
Re: Strange behavior when analyzing
How much RAM do you have?ernst wrote: ↑Mon May 18, 2020 12:21 pm Hi all, perhaps someone can reproduce the following behavior With latest Stockfish Development and Large Pages in Windows.
While analyzing the position below, I noticed that, after about 15 minutes, the nps drops signifcantly. At that same moment, CPU power consumption drops to half, but utilisation en clockspeed remains the same.
Anyone willing to give this a test?
[d]8/2N4r/1p3pkp/8/5K1p/2P4N/P3Bn2/8 w - -
Engine: Stockfish x64 popcnt (20480 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.
-
- Posts: 352
- Joined: Thu Mar 09, 2006 6:00 pm
Re: Strange behavior when analyzing
32 GB, AMD 3900x
This post may either be cause or result of misunderstandings.