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programming:instruction-timings [2006/12/14 14:34]
cyril |
programming:instruction-timings [2013/09/19 16:41] (current)
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| Multiprocessor configs and multicore processors doesn't bring any improvement on these tests, and that's normal. Indeed in order to exploit it you have to have several threads, which is not the case here, and not the purpose. | Multiprocessor configs and multicore processors doesn't bring any improvement on these tests, and that's normal. Indeed in order to exploit it you have to have several threads, which is not the case here, and not the purpose. |
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| All timings are given in nanoseconds (ns). | All timings are given in nanoseconds (ns). |
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| ^ Title ^ Code ^ Cyril_F ^ Cyril_P ^ cJ_F ^ cJ_P ^ Infomob ^ Almighty ^ PC104 ^ | ^ Title ^ Code ^ Cyril_F ^ Cyril_P ^ cJ_F ^ MacGyver ^ Infomob ^ Almighty ^ PC104 ^ |
| ^ RGB -> Y Conversion ^^^^^^^^^ | ^ RGB -> Y Conversion ^^^^^^^^^ |
| |Float |''imgg[k2++] = (0.299*img[k++] + 0.587*img[k++] + 0.114*img[k++]);'' | 175 | | | 6.09 ??! | 20.8 | 12.6 | 84.3 | | |Float |''imgg[k2++] = (0.299*img[k++] + 0.587*img[k++] + 0.114*img[k++]);'' | 175 | 18.8 | 22.1 | 6.09 ??! | 20.8 | 12.6 | 84.3 | |
| |Integer |''imgg[k2++] = (19595*img[k++] + 38470*img[k++] + 7471*img[k++]) >> 16;'' | 91.1 | | | | 25.1 | 4.03 | 153 | | |Integer |''imgg[k2++] = (19595*img[k++] + 38470*img[k++] + 7471*img[k++]) >> 16;'' | 91.1 | 8.92 | 8.30 | | 25.1 | 4.03 | 153 | |
| |Shift1 |''imgg[k2++] = (img[k++]>>2 + img[k]>>1 + img[k++]>>3 + img[k++]>>3);'' | 50.4 | | | | 10.6 | 5.97 | 29.3 | | |Shift1 |''imgg[k2++] = (img[k++]>>2 + img[k]>>1 + img[k++]>>3 + img[k++]>>3);'' | 50.4 | 9.75 | 11.2 | | 10.6 | 5.97 | 29.3 | |
| |Shift2 |''imgg[k2++] = (img[k]>>2 + img[k++]>>4 + img[k]>>1 + img[k++]>>4 + img[k++]>>3);'' | 56.7 | | | | 11.7 | 6.65 | 43.4 | | |Shift2 |''imgg[k2++] = (img[k]>>2 + img[k++]>>4 + img[k]>>1 + img[k++]>>4 + img[k++]>>3);'' | 56.7 | 12.5 | 13.3 | | 11.7 | 6.65 | 43.4 | |
| ^ Array indexes ^^^^^^^^^ | ^ Array indexes ^^^^^^^^^ |
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| ===== Configs used ===== | ===== Configs used ===== |
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| ^ ^ CPU ^ Frequence ^ Arith. Coproc. ^ Bogomips ^ FPU ^ Cache ^ GCC Version ^ | ^ ^ CPU ^ Frequence ^ Arith. Coproc. ^ Bogomips ^ FPU ^ Cache ^ GCC Version ^ |
| ^Cyril_F |Celeron Mendocino |500 MHz | |1003 |yes |128 KB| | | ^Cyril_F |Celeron Mendocino |500 MHz | |1003 |yes |128 KB|3. | |
| ^Cyril_P |AMD64 3000+ |1.8 GHz | | | | | | | ^Cyril_P |AMD64 3000+ |1.8 GHz | | 3593 |yes |1024 KB |4.1.1 | |
| ^cJ_F | | | | | | | | | ^cJ_F | AthlonXP 2400+ |2.0 GHz | | 4013 |yes |256 KB |4.1.1 | |
| ^cJ_P | Centrino | 1.7GHz | | | | | | | ^MacGyver | P-m Dothan |1.7 GHz | | 3400 | yes | 2MB | 4.1.1 | |
| ^Infomob |Tri-Xeon |2.80 GHz | |5570 |yes |512KB | | | ^Infomob |Tri-Xeon |2.80 GHz | |5570 |yes |512 KB |3.2.2 | |
| ^Almighty |PentiumD (DualCore64) |3.4 GHz | |6800 |yes |2048 KB | | | ^Almighty |PentiumD (DualCore64) |3.4 GHz | |6800 |yes |2048 KB |4.1.1 | |
| ^PC104 |Transmeta Crusoe TM5400 |500 MHz | |997 |yes |256 KB |3.4.6 | | ^PC104 |Transmeta Crusoe TM5400 |500 MHz | |997 |yes |256 KB |3.4.6 | |
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