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Comparison cpu usage for reconstruction jobs (2013-2016) with -m32 and -m64 options

Updated on Thu, 2016-05-19 15:40. Originally created by fisyak on 2016-05-19 14:00.

In the table below it is presented comparison cpu usage for reconstruction jobs on RCF nodes with 40 Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz. The numbers are seconds per event <averaged N events>. The compared compiler option are the following:

  • G32 : -m32 -g
  • O32: -m32 -O2
  • G64: -m64 -g
  • O64: -m64 -O2

In average

  • O32 is 2.73 times faster than G32,
  • G64 is 1.12 times faster than G32,
  • O64 is 3.00 time faster that G32, and
  • O64 is 1.12 time faster than O32.

Thus option "-m64" gives us 12% speed up with respect to "-m32".

  year chain/data -g -m32 G32 -O2 -m32 O32 -g -m64 G64 -O2 -m64 O64 G32/O32 G32/G64 G32/O64 O32/O64
Sti 2013 RC.pp500 96.12 <100> 39.28 <100> 85.38 <100> 36.17 <100> 2.447 1.126 2.657 1.086
Sti 2014 RC.AuAu15 11.45 <100> 4.79 <100> 10.50 <100> 4.26 <100> 2.390 1.090 2.688 1.124
Sti 2014 RC.AuAu200 89.87 <100> 34.97 <100> 80.53 <100> 30.57 <100> 2.570 1.116 2.940 1.144
Sti 2014 RC.AuAu200.low 110.70 <100> 39.34 <100> 98.23 <100> 39.13 <100> 2.814 1.127 2.829 1.005
Sti 2014 RC.AuAu200.mid 134.00 <100> 52.52 <100> 124.57 <100> 50.96 <100> 2.551 1.076 2.630 1.031
Sti 2014 RC.He3Au200 36.71 <100> 13.58 <100> 30.00 <100> 12.37 <100> 2.703 1.224 2.968 1.098
Sti 2015 RC.pp200long 29.62 <100> 11.34 <100> 26.80 <100> 10.51 <100> 2.612 1.105 2.818 1.079
Sti 2015 RC.pp200long.NoHFT 31.02 <100> 10.67 <100> 25.78 <100> 9.75 <100> 2.907 1.203 3.182 1.094
Sti 2016 RC.AuAu200.y2016 158.96 <100> 58.93 <100> 136.58 <100> 51.49 <100> 2.697 1.164 3.087 1.144
StiCA 2013 RC.pp500 96.69 <100> 37.11 <100> 81.93 <100> 32.70 <100> 2.605 1.180 2.957 1.135
StiCA 2014 RC.AuAu15 10.90 <100> 4.37 <100> 10.22 <100> 4.10 <100> 2.494 1.067 2.659 1.066
StiCA 2014 RC.AuAu200 87.14 <100> 33.20 <100> 77.74 <100> 26.59 <100> 2.625 1.121 3.277 1.249
StiCA 2014 RC.AuAu200.low 113.68 <100> 40.03 <100> 98.91 <100> 36.66 <100> 2.840 1.149 3.101 1.092
StiCA 2014 RC.AuAu200.mid 133.18 <100> 48.77 <100> 123.84 <100> 46.58 <100> 2.731 1.075 2.859 1.047
StiCA 2014 RC.He3Au200 31.12 <100> 12.55 <100> 29.59 <100> 11.16 <100> 2.480 1.052 2.789 1.125
StiCA 2015 RC.pp200long 27.97 <100> 10.67 <100> 24.98 <100> 9.34 <100> 2.621 1.120 2.995 1.142
StiCA 2015 RC.pp200long.NoHFT 25.71 <100> 9.77 <100> 24.33 <100> 9.24 <100> 2.632 1.057 2.782 1.057
StiCA 2016 RC.AuAu200.y2016 162.59 <100> 55.58 <100> 140.46 <100> 51.34 <100> 2.925 1.158 3.167 1.083
StiCAKFV 2013 RC.pp500 128.69 <100> 49.19 <100> 119.19 <100> 40.78 <100> 2.616 1.080 3.156 1.206
StiCAKFV 2014 RC.AuAu15 12.72 <100> 4.67 <100> 11.00 <100> 4.31 <100> 2.724 1.156 2.951 1.084
StiCAKFV 2014 RC.AuAu200 106.48 <100> 39.64 <100> 89.54 <100> 32.84 <100> 2.686 1.189 3.242 1.207
StiCAKFV 2014 RC.AuAu200.low 115.41 <100> 41.37 <100> 105.02 <100> 34.16 <100> 2.790 1.099 3.379 1.211
StiCAKFV 2014 RC.AuAu200.mid 169.99 <100> 62.03 <100>     2.740      
StiCAKFV 2014 RC.He3Au200 34.42 <100> 13.56 <100> 32.99 <100> 11.61 <100> 2.538 1.043 2.965 1.168
StiCAKFV 2015 RC.pp200long 31.33 <100> 11.37 <100> 29.53 <100> 9.95 <100> 2.755 1.061 3.149 1.143
StiCAKFV 2015 RC.pp200long.NoHFT 30.57 <100> 11.52 <100> 28.78 <100> 10.04 <100> 2.654 1.062 3.045 1.147
StiCAKFV 2016 RC.AuAu200.y2016 181.20 < 99> 59.98 <100> 150.34 <100> 48.74 <100> 3.021 1.205 3.718 1.231
Average             2.673 1.119 3.000 1.123
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