From mboxrd@z Thu Jan 1 00:00:00 1970 From: Darren Hart Subject: Re: Real-time kernel thread performance and optimization Date: Wed, 02 Jan 2013 09:21:28 -0800 Message-ID: <50E46C98.7090405@infradead.org> References: <6b5093025753dbc76e1d23af7c999826@mail.gmail.com> <50B933A5.3020400@am.sony.com> <50CF9A1E.5000902@am.sony.com> <50D257BF.2060803@infradead.org> <32844ba58ef36b5032ce5aa08ca2a985@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: frank.rowand@am.sony.com, linux-rt-users@vger.kernel.org, jkacur@redhat.com To: Simon Falsig Return-path: Received: from mga02.intel.com ([134.134.136.20]:19761 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752132Ab3ABRVa (ORCPT ); Wed, 2 Jan 2013 12:21:30 -0500 In-Reply-To: <32844ba58ef36b5032ce5aa08ca2a985@mail.gmail.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 12/20/2012 12:21 AM, Simon Falsig wrote: > On 12/20/2012 01:12 AM, Darren Hart wrote: >> On 12/17/2012 02:18 PM, Frank Rowand wrote: >>> On 12/11/12 06:30, Simon Falsig wrote: >>> >>> < snip > >>> >>>>>> Once I get this finished up, I'll be happy to do a complete >>>>>> write-up of the timer-thread code, if anyone is interested. I >>>>>> remember looking for something similar (but without success), when >>>>>> I wrote the code earlier this year. >>>>> >>>>> It would be very useful to add your results to the wiki. >>>>> >>>>> -Frank >>>> >>>> Cool - is there any particular place it should go? A how-to, FAQ >>>> entry, etc? Just so I know how to do the write-up... >>> >>> https://rt.wiki.kernel.org/index.php/Main_Page would be my default >>> suggestion. I'm not quite sure where on the wiki would be good >>> though. Maybe under "Tips and Techniques"? >>> >>> I added the rtwiki maintainers to the cc: list. >> >> I don't have all the context, but this sounds a bit more like something > for >> linux/Documentation (possibly for the preempt-rt patch set). If not, the >> Documentation section on the wiki is a possibility. >> -- >> Darren Hart >> Intel Open Source Technology Center >> Yocto Project - Technical Lead - Linux Kernel > > As I see it, the write-up could be done in two ways - 1) as a simple code > example of a real-time loop in a kernel module, 2) as a blog-like post of > the process I went through, investigating the performance, and optimizing > my code. > > In the case of 1), I guess it could be added to > https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO, as a kernel version > of the realtime example, or possibly to > https://rt.wiki.kernel.org/index.php/HOWTO:_Build_an_RT-application under > "Building Device Drivers"? In the case of 2) though, it could maybe be on > its own page under "Tips and techniques"? I'd leave the exploration type write-up to your blog and we can link to it. An explicit example in one of the locations above also sounds appropriate. Thanks, Darren