linux-kernel - Re: Make yield_task

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Message-ID: <20080221143838.GA12626@lazybastard.org>
Date:	Thu, 21 Feb 2008 15:38:38 +0100
From:	Jörn Engel <joern@...fs.org>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peter@...gramming.kicks-ass.net>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Make yield_task_fair more efficient

On Thu, 21 February 2008 12:21:33 +0530, Balbir Singh wrote:
> 
> For a large number of tasks - say 10000, we need to walk 14 levels before we

16.7, actually.  rbtrees are balanced treed, but they are not balanced
binary trees.  The average fan-out is sqrt(3) instead of 2.

Jörn

-- 
The cost of changing business rules is much more expensive for software
than for a secretaty.
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