On 04/02/2013 03:23 PM, Michael Wang wrote: >> > [patch v3 8/8] sched: use instant load for burst wake up > I've tested the patch set on 12 cpu X86 box with 3.9.0-rc2, and pgbench > show regression on high-end this time. > > | db_size | clients | tps | | tps | > +---------+---------+-------+ +-------+ > | 22 MB | 1 | 10662 | | 10446 | > | 22 MB | 2 | 21483 | | 20887 | > | 22 MB | 4 | 42046 | | 41266 | > | 22 MB | 8 | 55807 | | 51987 | > | 22 MB | 12 | 50768 | | 50974 | > | 22 MB | 16 | 49880 | | 49510 | > | 22 MB | 24 | 45904 | | 42398 | > | 22 MB | 32 | 43420 | | 40995 | > | 7484 MB | 1 | 7965 | | 7376 | > | 7484 MB | 2 | 19354 | | 19149 | > | 7484 MB | 4 | 37552 | | 37458 | > | 7484 MB | 8 | 48655 | | 46618 | > | 7484 MB | 12 | 45778 | | 45756 | > | 7484 MB | 16 | 45659 | | 44911 | > | 7484 MB | 24 | 42192 | | 37185 | -11.87% > | 7484 MB | 32 | 36385 | | 34447 | > | 15 GB | 1 | 7677 | | 7359 | > | 15 GB | 2 | 19227 | | 19049 | > | 15 GB | 4 | 37335 | | 36947 | > | 15 GB | 8 | 48130 | | 46898 | > | 15 GB | 12 | 45393 | | 43986 | > | 15 GB | 16 | 45110 | | 45719 | > | 15 GB | 24 | 41415 | | 36813 | -11.11% > | 15 GB | 32 | 35988 | | 34025 | > > The reason may caused by wake_affine()'s higher overhead, and pgbench is > really sensitive to this stuff...
Thanks for testing. Could you like to remove the last patch and test it again? I want to know if the last patch has effect on pgbench. -- Thanks Alex -- 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/
