linux-kernel - Re: workqueue thing

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Message-ID: <4B321E72.4070103@s5r6.in-berlin.de>
Date:	Wed, 23 Dec 2009 14:43:14 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>, awalls@...ix.net,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, jens.axboe@...cle.com,
	rusty@...tcorp.com.au, cl@...ux-foundation.org,
	dhowells@...hat.com, arjan@...ux.intel.com, avi@...hat.com,
	johannes@...solutions.net, andi@...stfloor.org
Subject: Re: workqueue thing

Stefan Richter wrote:
> Ingo Molnar wrote:
>> (Plus reduction in driver complexity can be measured as well, in the diffstat 
>> space.)
>>
>> So there's no leap of faith needed really, IMHO.
> 
> To measure this properly by means of diffstat, first convert typical
> create_singlethread_workqueue users to <linux/slow-work.h>, then convert
> them back to <linux/workqueue.h>.  Then look at the diffstat of the
> _second_ step.

PS:  Or easier, just do the first step and take its diffstat --- the
reverse of that diffstat is more or less the benefit that cmwq would
provide.
-- 
Stefan Richter
-=====-==--= ==-- =-===
http://arcgraph.de/sr/
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