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 <wang...@linux.vnet.ibm.com>
---
core.c | 61 +++++++++++++++++++++++++++++
fair.c | 133 +++++++++++++++++++++++++++++++++-------------------------------
sched.h | 28 +++++++++++++
3 files changed, 159 insertions(+), 63 deletions(-)
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