Multi-threaded PI calculator [beta]

[skulstation]

Thanks!
That's a 97,5% gain from adding a second CPU. Can you try lowering FSB and testing with one and two CPUs to see if scaling will depend on FSB speed?

this ar the scores for 1 qx9775 cpu

fsb @ 333 mhz

1 thread = 178.165083 cpu 30%
2 threeds = 88.725863 cpu 52%
3 threads = 58.948085 cpu 80%
4 threads = 45.554539 cpu 100%
5 threads = 45.437149 cpu 100%
6 threads = 45.912756 cpu 100%
7 threads = 45.746961 cpu 100%
8 threads = 45.384928 cpu 100%

fsb @ 350

1 thread = 169.109148 cpu 30%
2 threads = 84.167200 cpu 50%
3 threads = 56.074819 cpu 80%
4 threads = 43.433110 cpu 100%
5 threads = 43.924105 cpu 100%
6 threads = 46.730928 cpu 100%
7 threads = 44.428434 cpu 100%
8 threads = 43.113325 cpu 100%

fsb @ 375

1 thread = 158.002677 cpu 30%
2 threads = 78.883299 cpu 50%
3 threads = 52.362515 cpu 75%
4 threads = 40.428002 cpu 100%
5 threads = 41.447173 cpu 100%
6 threads = 42.936090 cpu 100%
7 threads = 41.370116 cpu 100%
8 threads = 40.197159 cpu 100%

fsb @ 400

1 thread = 148.451343 cpu 30%
2 threads = 73.794790 cpu 50%
3 threads = 49.139341 cpu 75%
4 threads = 37.464803 cpu 100%
5 threads = 37.764520 cpu 100%
6 threads = 37.824189 cpu 100%
7 threads = 38.164949 cpu 100%
8 threads = 37.769174 cpu 100%

[skulstation]

this ar the scores for 2 qx9775 cpu's

fsb @ 333

1 thread = 178.064861 cpu 15%
2 threeds = 88.658071 cpu 25%
3 threads = 58.992512 cpu 40%
4 threads = 44.162003 cpu 51%
5 threads = 35.311457 cpu 64%
6 threads = 29.403103 cpu 75%
7 threads = 25.222771 cpu 90%
8 threads = 22.702096 cpu 100%

fsb @ 350

1 thread = 169.231025 cpu 15%
2 threads = 84.482256 cpu 25%
3 threads = 56.082044 cpu 40%
4 threads = 42.029203 cpu 50%
5 threads = 33.634543 cpu 64%
6 threads = 24.965172 cpu 75%
7 threads = 23.995676 cpu 89%
8 threads = 21.722478 cpu 100%

fsb @ 375

1 thread = 158.241801 cpu 15%
2 threads = 78.859202 cpu 25%
3 threads = 52.356005 cpu 40%
4 threads = 39.219941 cpu 50%
5 threads = 31.374251 cpu 64%
6 threads = 26.128320 cpu 75%
7 threads = 22.399811 cpu 89%
8 threads = 19.956898 cpu 100%

fsb @ 400

1 thread = 147.935828 cpu 15%
2 threads = 73.925969 cpu 25%
3 threads = 49.154654 cpu 40%
4 threads = 36.804271 cpu 50%
5 threads = 29.451769 cpu 64%
6 threads = 24.518910 cpu 75%
7 threads = 21.030319 cpu 89%
8 threads = 18.887439 cpu 100%