[mm] e04ddfd12aa: +9.4% ebizzy.throughput

Fengguang Wu
2014-04-05T00:21:14Z

Hi Davidlohr,

FYI, there are noticeable ebizzy throughput increases on commit
e04ddfd12aa03471eff7daf3bc2435c7cea8e21f ("mm: per-thread vma caching")

test case: lkp-st02/micro/ebizzy/200%-100-10

700141f349f2b05 e04ddfd12aa03471eff7daf3b
--------------- -------------------------
23726 ~ 0% +9.4% 25955 ~ 0% TOTAL ebizzy.throughput
1525 ~ 0% +9.3% 1667 ~ 0% TOTAL ebizzy.throughput.per_thread.max
1428 ~ 0% +9.1% 1558 ~ 0% TOTAL ebizzy.throughput.per_thread.min
14.42 ~ 0% +8.1% 15.59 ~ 0% TOTAL ebizzy.time.user
65.29 ~ 0% -1.8% 64.12 ~ 0% TOTAL ebizzy.time.sys
4290 ~17% -28.4% 3073 ~22% TOTAL slabinfo.buffer_head.active_objs
4313 ~17% -28.8% 3073 ~22% TOTAL slabinfo.buffer_head.num_objs
165372 ~ 0% +9.2% 180527 ~ 0% TOTAL vmstat.system.in
1443 ~ 0% +8.1% 1560 ~ 0% TOTAL time.user_time
6529 ~ 0% -1.8% 6413 ~ 0% TOTAL time.system_time

Legend:
~XX% - stddev percent
[+-]XX% - change percent

ebizzy.throughput

26500 ++O-----------O---O------------------------------------------------+
O O O O O O O O O O O |
26000 ++ O O O O O |
| O O O |
| |
25500 ++ |
| |
25000 ++ |
| |
24500 ++ |
| |
*.*.*. .*. .*.*.*. .*.*. *.*.*.*. |
24000 ++ *.* * *.* *.*.*.* *.*.*.*.*.*. |
| *.*.*.*.*.*.*
23500 ++-----------------------------------------------------------------+

[*] bisect-good sample
[O] bisect-bad sample

Thanks,
Fengguang

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