From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: balbir@linux.vnet.ibm.com
Cc: Ingo Molnar <mingo@elte.hu>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: Make yield_task_fair more efficient
Date: Thu, 21 Feb 2008 11:01:30 +0100 [thread overview]
Message-ID: <1203588090.6243.128.camel@lappy> (raw)
In-Reply-To: <47BD479F.6070901@linux.vnet.ibm.com>
On Thu, 2008-02-21 at 15:12 +0530, Balbir Singh wrote:
> 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
I'm quite aware of the meaning of threaded in the context of data
structures. They usually require additional list data and operations to
implement.
Look at how the latter link you provided grows the rb_node with one
pointer to provide a single linked list.
next prev parent reply other threads:[~2008-02-21 10:01 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-21 5:33 Make yield_task_fair more efficient Balbir Singh
2008-02-21 6:04 ` Ingo Molnar
2008-02-21 6:51 ` Balbir Singh
2008-02-21 7:07 ` Ingo Molnar
2008-02-21 7:39 ` Balbir Singh
2008-02-21 8:43 ` Peter Zijlstra
2008-02-21 8:50 ` Balbir Singh
2008-02-21 9:04 ` Ingo Molnar
2008-02-21 9:31 ` Balbir Singh
2008-02-21 9:42 ` Ingo Molnar
2008-02-21 9:44 ` Balbir Singh
2008-02-21 9:43 ` Peter Zijlstra
2008-02-21 9:42 ` Balbir Singh
2008-02-21 10:01 ` Peter Zijlstra [this message]
2008-02-21 10:07 ` Balbir Singh
2008-02-21 11:12 ` Peter Zijlstra
2008-02-21 11:27 ` Balbir Singh
2008-02-21 20:38 ` Jens Axboe
2008-02-21 20:55 ` Jens Axboe
2008-02-22 3:27 ` Balbir Singh
2008-02-21 10:17 ` Balbir Singh
2008-02-21 12:02 ` Mike Galbraith
2008-02-21 12:06 ` Mike Galbraith
2008-02-21 13:29 ` Balbir Singh
2008-02-21 14:38 ` Jörn Engel
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