Here the results, also as PDF-File:
http://www.fastgm.de/schach/SMP-scaling.pdf
Symmetric multiprocessing (SMP) scaling
Stockfish 8 and Komodo 10.4 under Windows & Linux
Windows: Windows 10 Professional 64-Bit, Dual AMD Opteron 6376 @ 2.3 GHz
Linux: Ubuntu Server 16.04 LTS (HVM) 64-Bit, Amazon EC2 Instance, m4.16xlarge, Intel Xeon E5-2686v4 @ 2.3 GHz
Engines: default settings, 128 MB Hash
Cutechess-Cli: no draw and resign rules, no ponder, no learning, no tablebases, 1500 different opening positions, changing colors
TC = time control, T = number of threads, Elostat Start Elo = 3000
Code: Select all
Windows – 1 thread vs 2 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T2 : 3031 6 6 3000 58.7 % 73.7 % 21.59 1 Komodo 10.4 T2 : 3044 8 8 3000 62.3 % 59.1 % 18.48
2 Stockfish 8 T1 : 2969 6 6 3000 41.3 % 73.7 % 20.33 2 Komodo 10.4 T1 : 2956 8 8 3000 37.7 % 59.1 % 17.44
Result : 1761.0/3000 (+655,=2212,-133) Result : 1868.5/3000 (+982,=1773,-245)
Perf. : 58.7 % Perf. : 62.3 %
Elo : 3061 Elo : 3087
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Linux – 1 thread vs 2 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T2 : 3039 7 7 3000 61.0 % 68.1 % 19.84 1 Komodo 10.4 T2 : 3044 8 8 3000 62.3 % 55.2 % 17.02
2 Stockfish 8 T1 : 2961 7 7 3000 39.0 % 68.1 % 18.73 2 Komodo 10.4 T1 : 2956 8 8 3000 37.7 % 55.2 % 16.06
Result : 1830.0/3000 (+809,=2042,-149) Result : 1868.5/3000 (+1040,=1657,-303)
Perf. : 61.0 % Perf. : 62.3 %
Elo : 3078 Elo : 3087
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Windows – 1 thread vs 4 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T4 : 3056 7 7 3000 65.6 % 65.7 % 23.08 1 Komodo 10.4 T4 : 3076 8 8 3000 70.6 % 51.5 % 20.04
2 Stockfish 8 T1 : 2944 7 7 3000 34.4 % 65.7 % 20.66 2 Komodo 10.4 T1 : 2924 8 8 3000 29.4 % 51.5 % 17.71
Result : 1968.0/3000 (+982,=1972,-46) Result : 2118.0/3000 (+1345,=1546,-109)
Perf. : 65.6 % Perf. : 70.6 %
Elo : 3112 Elo : 3152
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Linux – 1 thread vs 4 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T4 : 3064 7 7 3000 67.6 % 61.2 % 21.41 1 Komodo 10.4 T4 : 3084 9 9 3000 72.4 % 47.4 % 18.51
2 Stockfish 8 T1 : 2936 7 7 3000 32.4 % 61.2 % 19.39 2 Komodo 10.4 T1 : 2916 9 9 3000 27.7 % 47.4 % 16.29
Result : 2028.5/3000 (+1111,=1835,-54) Result : 2170.5/3000 (+1459,=1423,-118)
Perf. : 67.6 % Perf. : 72.4 %
Elo : 3128 Elo : 3167
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Windows – 1 thread vs 8 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T8 : 3079 8 8 3000 71.2 % 56.4 % 23.87 1 Komodo 10.4 T8 : 3104 9 9 3000 76.8 % 42.7 % 21.19
2 Stockfish 8 T1 : 2921 8 8 3000 28.8 % 56.4 % 20.40 2 Komodo 10.4 T1 : 2896 9 9 3000 23.2 % 42.7 % 17.82
Result : 2135.5/3000 (+1289,=1693,-18) Result : 2305.5/3000 (+1665,=1281,-54)
Perf. : 71.2 % Perf. : 76.8 %
Elo : 3157 Elo : 3208
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Linux – 1 thread vs 8 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T8 : 3093 8 8 3000 74.4 % 50.4 % 22.35 1 Komodo 10.4 T8 : 3121 10 10 3000 80.1 % 35.8 % 19.47
2 Stockfish 8 T1 : 2907 8 8 3000 25.6 % 50.4 % 19.38 2 Komodo 10.4 T1 : 2879 10 10 3000 19.9 % 35.8 % 16.25
Result : 2232.5/3000 (+1477,=1511,-12) Result : 2404.0/3000 (+1867,=1074,-59)
Perf. : 74.4 % Perf. : 80.1 %
Elo : 3185 Elo : 3242
----------------------------------------------------------------------------------------------------------------------------------------------
Windows – 1 thread vs 16 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T16 : 3101 9 9 3000 76.1 % 47.4 % 24.93 1 Komodo 10.4 T16 : 3140 11 11 3000 83.3 % 32.0 % 21.31
2 Stockfish 8 T1 : 2899 9 9 3000 23.9 % 47.4 % 20.16 2 Komodo 10.4 T1 : 2860 11 11 3000 16.7 % 32.0 % 17.38
Result : 2283.0/3000 (+1572,=1422,-6) Result : 2499.5/3000 (+2020,=959,-21)
Perf. : 76.1 % Perf. : 83.3 %
Elo : 3201 Elo : 3279
----------------------------------------------------------------------------------------------------------------------------------------------
Linux – 1 thread vs 16 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T16 : 3113 13 13 1516 78.7 % 42.0 % 23.33 1 Komodo 10.4 T16 : 3163 18 17 1514 86.7 % 24.8 % 20.42
2 Stockfish 8 T1 : 2887 13 13 1516 21.3 % 42.0 % 19.33 2 Komodo 10.4 T1 : 2837 17 18 1514 13.3 % 24.8 % 16.12
Result : 1192.5/1516 (+874,=637,-5) Result : 1313.0/1514 (+1125,=376,-13)
Perf. : 78.7 % Perf. : 86.7 %
Elo : 3227 Elo : 3326
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Linux – 1 thread vs 32 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T32 : 3115 13 13 1502 79.0 % 41.5 % 23.03 1 Komodo 10.4 T32 : 3172 18 18 1502 87.9 % 23.4 % 20.94
2 Stockfish 8 T1 : 2885 13 13 1502 21.0 % 41.5 % 19.45 2 Komodo 10.4 T1 : 2828 18 18 1502 12.1 % 23.4 % 16.22
Result : 1186.0/1502 (+874,=624,-4) Result : 1320.5/1502 (+1145,=351,-6)
Perf. : 79.0 % Perf. : 87.9 %
Elo : 3230 Elo : 3345
----------------------------------------------------------------------------------------------------------------------------------------------
Windows – 2 threads vs 4 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T4 : 3027 6 6 3000 57.7 % 76.5 % 22.95 1 Komodo 10.4 T4 : 3043 8 8 3000 62.2 % 60.7 % 19.82
2 Stockfish 8 T2 : 2973 6 6 3000 42.3 % 76.5 % 21.61 2 Komodo 10.4 T2 : 2957 8 8 3000 37.8 % 60.7 % 18.23
Result : 1732.0/3000 (+584,=2296,-120) Result : 1867.0/3000 (+956,=1822,-222)
Perf. : 57.7 % Perf. : 62.2 %
Elo : 3054 Elo : 3087
----------------------------------------------------------------------------------------------------------------------------------------------
Linux – 2 threads vs 4 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T4 : 3032 9 9 1570 59.2 % 71.6 % 21.32 1 Komodo 10.4 T4 : 3033 11 11 1512 59.5 % 56.9 % 18.21
2 Stockfish 8 T2 : 2968 9 9 1570 40.8 % 71.6 % 20.28 2 Komodo 10.4 T2 : 2967 11 11 1512 40.5 % 56.9 % 17.08
Result : 929.0/1570 (+367,=1124,-79) Result : 900.0/1512 (+470,=860,-182)
Perf. : 59.2 % Perf. : 59.5 %
Elo : 3064 Elo : 3067
----------------------------------------------------------------------------------------------------------------------------------------------
Windows – 4 threads vs 8 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T8 : 3024 6 6 3000 56.9 % 78.5 % 24.39 1 Komodo 10.4 T8 : 3037 7 7 3000 60.4 % 64.4 % 20.70
2 Stockfish 8 T4 : 2976 6 6 3000 43.1 % 78.5 % 23.11 2 Komodo 10.4 T4 : 2963 7 7 3000 39.6 % 64.4 % 19.59
Result : 1707.0/3000 (+529,=2356,-115) Result : 1812.5/3000 (+847,=1931,-222)
Perf. : 56.9 % Perf. : 60.4 %
Elo : 3048 Elo : 3073
----------------------------------------------------------------------------------------------------------------------------------------------
Linux – 4 threads vs 8 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T8 : 3023 8 8 1510 56.6 % 76.8 % 22.87 1 Komodo 10.4 T8 : 3029 10 10 1510 58.3 % 64.0 % 19.49
2 Stockfish 8 T4 : 2977 8 8 1510 43.4 % 76.8 % 21.96 2 Komodo 10.4 T4 : 2971 10 10 1510 41.7 % 64.0 % 18.78
Result : 854.5/1510 (+275,=1159,-76) Result : 881.0/1510 (+398,=966,-146)
Perf. : 56.6 % Perf. : 58.3 %
Elo : 3046 Elo : 3059
----------------------------------------------------------------------------------------------------------------------------------------------
Windows – 8 threads vs 16 threads
TC = 60" + 0.05"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T16 : 3023 5 5 3000 56.5 % 80.0 % 25.68 1 Komodo 10.4 T16 : 3033 7 7 3000 59.2 % 65.6 % 21.22
2 Stockfish 8 T8 : 2977 5 5 3000 43.5 % 80.0 % 24.31 2 Komodo 10.4 T8 : 2967 7 7 3000 40.8 % 65.6 % 20.47
Result : 1694.0/3000 (+494,=2400,-106) Result : 1777.5/3000 (+793,=1969,-238)
Perf. : 56.5 % Perf. : 59.2 %
Elo : 3045 Elo : 3065
----------------------------------------------------------------------------------------------------------------------------------------------
Linux – 8 threads vs 16 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T16 : 3016 8 8 1514 54.5 % 79.4 % 24.20 1 Komodo 10.4 T16 : 3022 10 10 1512 56.3 % 65.3 % 20.56
2 Stockfish 8 T8 : 2984 8 8 1514 45.5 % 79.4 % 23.73 2 Komodo 10.4 T8 : 2978 10 10 1512 43.7 % 65.3 % 19.88
Result : 825.0/1514 (+224,=1202,-88) Result : 851.5/1512 (+358,=987,-167)
Perf. : 54.5 % Perf. : 56.3 %
Elo : 3031 Elo : 3044
----------------------------------------------------------------------------------------------------------------------------------------------
Linux – 16 threads vs 32 threads
TC = 10" + 0.1"
Program Elo + - Games Score Draws Depth Program Elo + - Games Score Draws Depth
------------------------------------------------------------------- -------------------------------------------------------------------
1 Stockfish 8 T32 : 3004 8 7 1254 51.3 % 84.8 % 25.62 1 Komodo 10.4 T32 : 3004 11 11 1156 51.1 % 70.2 % 20.86
2 Stockfish 8 T16 : 2996 7 8 1254 48.7 % 84.8 % 25.92 2 Komodo 10.4 T16 : 2996 11 11 1156 48.9 % 70.2 % 21.37
Result : 643.0/1254 (+111,=1064,-79) Result : 591.0/1156 (+185,=812,-159)
Perf. : 51.3 % Perf. : 51.1 %
Elo : 3009 Elo : 3008