Multi-Core Scaling: Intel Xeon X5482 Harpertown
Multi-threaded Pi Benchmark: y-cruncher v0.4.4
By Alexander J. Yee
(Last updated: December 28, 2009)
Benchmark Settings
| Mode: | Ram Only |
| Algorithm: | Chudnovsky Formula |
| Priority: | High |
| 1 thread |
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| 2 threads |
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| 4 threads |
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| 8 threads |
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Benchmarks
All times in seconds. All times include base-conversions.
Note that when comparing these benchmarks to that of previous versions of y-cruncher, it appears that multi-core scaling is worse in newer versions.
This is because y-cruncher is limited by memory bandwidth on this system.
As y-cruncher gets faster due to optimizations, it needs more bandwidth. Therefore, newer versions of y-cruncher are more bottlenecked by memory bandwidth than previous versions.
Processor(s): |
2 x 3.2 GHz Intel Xeon - X5482 Harpertown
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Memory: |
64 GB DDR2 - 800 MHz (quad channel)
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Courtesy Of: |
Alexander Yee
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Version: |
v0.4.4.7760 (x64 SSE4.1 ~ Nagisa)
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Decimal Digits |
1 thread |
2 threads |
4 threads |
8 threads |
2-t scaling |
4-t scaling |
8-t scaling |
10,000 |
0.039 | 0.036 | 0.040 | 0.042 | 1.083 | 0.975 | 0.929 |
12,000 |
0.040 | 0.037 | 0.042 | 0.043 | 1.081 | 0.952 | 0.930 |
15,000 |
0.040 | 0.039 | 0.043 | 0.044 | 1.026 | 0.930 | 0.909 |
20,000 |
0.043 | 0.041 | 0.045 | 0.047 | 1.049 | 0.956 | 0.915 |
25,000 |
0.046 | 0.043 | 0.047 | 0.051 | 1.070 | 0.979 | 0.902 |
40,000 |
0.052 | 0.049 | 0.053 | 0.057 | 1.061 | 0.981 | 0.912 |
50,000 |
0.058 | 0.055 | 0.059 | 0.062 | 1.055 | 0.983 | 0.935 |
75,000 |
0.071 | 0.066 | 0.069 | 0.073 | 1.076 | 1.029 | 0.973 |
100,000 |
0.086 | 0.078 | 0.082 | 0.085 | 1.103 | 1.049 | 1.012 |
120,000 |
0.096 | 0.088 | 0.092 | 0.095 | 1.091 | 1.043 | 1.011 |
150,000 |
0.115 | 0.101 | 0.105 | 0.109 | 1.139 | 1.095 | 1.055 |
200,000 |
0.150 | 0.125 | 0.129 | 0.130 | 1.200 | 1.163 | 1.154 |
250,000 |
0.179 | 0.150 | 0.155 | 0.154 | 1.193 | 1.155 | 1.162 |
400,000 |
0.305 | 0.232 | 0.228 | 0.215 | 1.315 | 1.338 | 1.419 |
500,000 |
0.390 | 0.292 | 0.285 | 0.264 | 1.336 | 1.368 | 1.477 |
750,000 |
0.652 | 0.446 | 0.397 | 0.381 | 1.462 | 1.642 | 1.711 |
1,000,000 |
0.904 | 0.598 | 0.513 | 0.470 | 1.512 | 1.762 | 1.923 |
1,200,000 |
1.146 | 0.731 | 0.597 | 0.575 | 1.568 | 1.920 | 1.993 |
1,500,000 |
1.514 | 0.967 | 0.798 | 0.767 | 1.566 | 1.897 | 1.974 |
2,000,000 |
2.101 | 1.316 | 1.041 | 0.966 | 1.597 | 2.018 | 2.175 |
2,500,000 |
2.807 | 1.702 | 1.313 | 1.207 | 1.649 | 2.138 | 2.326 |
4,000,000 |
4.934 | 2.877 | 2.111 | 1.829 | 1.715 | 2.337 | 2.698 |
5,000,000 |
6.599 | 3.734 | 2.701 | 2.298 | 1.767 | 2.443 | 2.872 |
7,500,000 |
10.727 | 5.991 | 4.064 | 3.285 | 1.791 | 2.640 | 3.265 |
10,000,000 |
15.109 | 8.180 | 5.457 | 4.215 | 1.847 | 2.769 | 3.585 |
12,000,000 |
18.892 | 10.061 | 6.677 | 5.080 | 1.878 | 2.829 | 3.719 |
15,000,000 |
24.390 | 12.852 | 8.300 | 6.162 | 1.898 | 2.939 | 3.958 |
20,000,000 |
34.605 | 18.095 | 11.219 | 8.126 | 1.912 | 3.084 | 4.259 |
25,000,000 |
44.466 | 23.258 | 13.541 | 9.954 | 1.912 | 3.284 | 4.467 |
40,000,000 |
78.125 | 40.599 | 22.873 | 15.811 | 1.924 | 3.416 | 4.941 |
50,000,000 |
100.058 | 52.002 | 29.128 | 18.512 | 1.924 | 3.435 | 5.405 |
75,000,000 |
158.578 | 82.408 | 45.459 | 27.519 | 1.924 | 3.488 | 5.762 |
100,000,000 |
222.659 | 115.751 | 63.151 | 37.862 | 1.924 | 3.526 | 5.881 |
120,000,000 |
272.227 | 141.742 | 77.067 | 45.430 | 1.921 | 3.532 | 5.992 |
150,000,000 |
351.234 | 183.410 | 99.055 | 57.245 | 1.915 | 3.546 | 6.136 |
200,000,000 |
493.666 | 257.093 | 138.213 | 77.808 | 1.920 | 3.572 | 6.345 |
250,000,000 |
635.391 | 332.281 | 178.857 | 99.809 | 1.912 | 3.553 | 6.366 |
400,000,000 |
1,093.225 | 571.542 | 305.103 | 167.343 | 1.913 | 3.583 | 6.533 |
500,000,000 |
1,416.482 | 739.034 | 394.376 | 214.766 | 1.917 | 3.592 | 6.595 |
750,000,000 |
2,244.910 | 1,173.298 | 622.805 | 336.607 | 1.913 | 3.605 | 6.669 |
1,000,000,000 |
3,116.666 | 1,638.771 | 870.481 | 468.427 | 1.902 | 3.580 | 6.653 |
1,200,000,000 |
3,808.336 | 1,997.714 | 1,056.326 | 567.112 | 1.906 | 3.605 | 6.715 |
1,500,000,000 |
4,929.117 | 2,594.736 | 1,374.831 | 732.854 | 1.900 | 3.585 | 6.726 |
2,000,000,000 |
6,852.619 | 3,613.834 | 1,915.029 | 1,018.986 | 1.896 | 3.578 | 6.725 |
2,500,000,000 |
8,814.028 | 4,673.048 | 2,461.997 | 1,309.340 | 1.886 | 3.580 | 6.732 |
4,000,000,000 |
15,086.043 | 7,997.667 | 4,221.144 | 2,241.985 | 1.886 | 3.574 | 6.729 |
5,000,000,000 |
19,445.635 | 10,297.464 | 5,435.502 | 2,882.621 | 1.888 | 3.578 | 6.746 |
7,500,000,000 |
30,586.340 | 16,178.560 | 8,564.374 | 4,533.579 | 1.891 | 3.571 | 6.747 |
10,000,000,000 |
42,443.011 | 22,417.598 | 11,888.070 | 6,270.444 | 1.893 | 3.570 | 6.769 |
12,000,000,000 |
52,641.694 | 27,715.150 | 14,706.900 | 7,814.710 | 1.899 | 3.579 | 6.736 |
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