Unfortunately, my test suite is not particularly lightweight. Here are some figures (idle at full speed, and doing a parallel kernel compile) for a 2.5 GHz Phenom.
Quite different numbers compared to the Ivy Bridge. When the processor is bust, fast_mix takes longer, instead. And even the rolled up fast_mix2 is (slightly) faster than the original fast_mix. The 64-bit code is basically the same speed as the 2x unrolled 32-bit code. Presented in the same strange order as the Ivy Bridge, even though it's not fastest-to-slowest this time. Rolled up, 3x: 30748 5432 49066 24126 30583 6526 50271 23788 28621 4541 52966 25610 28017 3425 54181 25733 30425 5213 54441 25878 28556 3895 48969 26499 27853 3057 50813 25431 27471 2396 54065 27685 30328 5053 55931 27500 28702 3821 50811 24877 Unrolled, 3x: 26785 4278 40386 12695 25617 3302 41349 16593 25154 2357 41166 15904 24816 1886 40571 17449 27537 4927 41716 15723 28128 6657 42085 18098 25640 3410 41453 16486 25087 2199 39964 12193 27750 5384 38960 13672 26584 4699 38280 13697 Original: 35291 10362 82640 37663 32043 7848 81887 44853 32968 8994 80527 44847 31087 7207 84894 47535 29904 5602 81426 45401 34312 9824 54889 29060 36471 12948 65112 34232 31622 8539 63531 33871 31570 7745 57946 29070 30074 6116 62829 34393 Unrolled, 2x: 24491 2411 40335 16992 27644 6721 38981 16068 25473 4347 35260 10750 24784 3372 34211 10360 24326 2689 34178 11200 26404 4896 34498 10483 24905 3517 33793 10409 24107 2150 35321 11330 23968 1903 33818 11301 26254 4671 32728 9547 64-bit: 26877 7949 52258 25946 24862 5940 55765 27634 24528 5032 56568 28142 24844 5223 55007 27671 27115 8018 55754 27873 25504 6504 54286 27471 24772 5673 52717 26609 24427 4889 51362 27109 27219 8276 51431 22619 25640 6718 52835 26329 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
