Re: [PATCH] sched: Reduce overhead in balance_tasks()
From: Ingo Molnar
Date: Fri Aug 24 2007 - 02:04:37 EST
* Peter Williams <pwil3058@xxxxxxxxxxxxxx> wrote:
> At the moment, balance_tasks() provides low level functionality for
> both
> move_tasks() and move_one_task() (indirectly) via the load_balance()
> function (in the sched_class interface) which also provides dual
> functionality. This dual functionality complicates the interfaces and
> internal mechanisms and makes the run time overhead of operations that
> are called with two run queue locks held.
>
> This patch addresses this issue and reduces the overhead of these
> operations.
hm, i like it, and added it to my queue (probably .24 material though),
but note that it increases .text and .data overhead:
text data bss dec hex filename
41028 37794 2168 80990 13c5e sched.o.before
41349 37826 2168 81343 13dbf sched.o.after
is that expected?
Ingo
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