From: Ingo Molnar <mingo@elte.hu>
To: Peter Williams <pwil3058@bigpond.net.au>
Cc: Nick Piggin <npiggin@suse.de>,
"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched: Reduce overhead in balance_tasks()
Date: Fri, 24 Aug 2007 08:04:03 +0200 [thread overview]
Message-ID: <20070824060403.GB24742@elte.hu> (raw)
In-Reply-To: <46C2842E.3010806@bigpond.net.au>
* Peter Williams <pwil3058@bigpond.net.au> 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
next prev parent reply other threads:[~2007-08-24 6:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-15 4:42 Peter Williams
2007-08-24 6:04 ` Ingo Molnar [this message]
2007-08-25 1:50 ` Peter Williams
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