linux-kernel - Re: Make yield_task

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Message-ID: <47BD479F.6070901@linux.vnet.ibm.com>
Date:	Thu, 21 Feb 2008 15:12:55 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	Ingo Molnar <mingo@...e.hu>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	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

Peter Zijlstra wrote:
> On Thu, 2008-02-21 at 15:01 +0530, Balbir Singh wrote:
> 
>> I have an alternate approach in mind (that I need to find time for),
>> threaded-rbtrees. Walking the tree is really efficient, specially finding
>> successor of a node.
> 
> Threading the rbtrees would be even more expensive, it would require a
> list_head in each node and a full list operation for every tree
> operation.
> 

Peter, when I say threaded, I don't mean threaded as in tasks. Please see
http://www.nist.gov/dads/HTML/threadedtree.html and
http://datastructures.itgo.com/trees/tbt.htm

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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