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    Subject[RFC PATCH 0/2] sched: simplify the select_task_rq_fair()
    This patch set is trying to simplify the select_task_rq_fair() with
    schedule balance map.

    After get rid of the complex code and reorganize the logical, pgbench show
    the improvement.

    Prev:
    | db_size | clients | tps |
    +---------+---------+-------+
    | 22 MB | 1 | 4437 |
    | 22 MB | 16 | 51351 |
    | 22 MB | 32 | 49959 |
    | 7484 MB | 1 | 4078 |
    | 7484 MB | 16 | 44681 |
    | 7484 MB | 32 | 42463 |
    | 15 GB | 1 | 3992 |
    | 15 GB | 16 | 44107 |
    | 15 GB | 32 | 41797 |

    Post:
    | db_size | clients | tps |
    +---------+---------+-------+
    | 22 MB | 1 | 11053 | +149.11%
    | 22 MB | 16 | 55671 | +8.41%
    | 22 MB | 32 | 52596 | +5.28%
    | 7483 MB | 1 | 8180 | +100.59%
    | 7483 MB | 16 | 48392 | +8.31%
    | 7483 MB | 32 | 44185 | +0.18%
    | 15 GB | 1 | 8127 | +103.58%
    | 15 GB | 16 | 48156 | +9.18%
    | 15 GB | 32 | 43387 | +3.8%

    Please check the patch for more details about schedule balance map, they
    currently based on linux-next 3.7.0-rc6, will rebase them to tip tree in
    follow version.

    Comments are very welcomed.

    Test with:
    12 cpu X86 server and linux-next 3.7.0-rc6.

    Michael Wang (2):
    [PATCH 1/2] sched: schedule balance map foundation
    [PATCH 2/2] sched: simplify select_task_rq_fair() with schedule balance map

    Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com>
    ---
    core.c | 61 +++++++++++++++++++++++++++++
    fair.c | 133 +++++++++++++++++++++++++++++++++-------------------------------
    sched.h | 28 +++++++++++++
    3 files changed, 159 insertions(+), 63 deletions(-)



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