From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Wagner Subject: Re: [RFD 0/5] Add latency histogram Date: Fri, 01 May 2015 09:22:46 +0000 Message-ID: <554345E6.7040005@monom.org> References: <1430388385-29558-1-git-send-email-daniel.wagner@bmw-carit.de> <1430445124.17922.12.camel@picadillo> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Steven Rostedt , Ingo Molnar , Carsten Emde , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org To: Tom Zanussi , Daniel Wagner Return-path: In-Reply-To: <1430445124.17922.12.camel@picadillo> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org Hi Tom, On 05/01/2015 01:52 AM, Tom Zanussi wrote: > Hi Daniel, > > On Thu, 2015-04-30 at 12:06 +0200, Daniel Wagner wrote: >> Hi, >> >> I would like to discuss a possible way of getting the feature of the >> latecy_hist.patch [1] added to mainline. >> >> "Latency histograms are primarily relevant in the context of real-time >> enabled kernels (CONFIG_PREEMPT/CONFIG_PREEMPT_RT)and are used in the >> quality management of the Linux real-time capabilities." >> >> Steven pointed out that this might be doable based on Tom Zanussi's >> "[PATCH v4 0/7] tracing: 'hist' triggers" [2]. >> >> Here are my findings. It was not too complicated to get it working, >> though I had to add some hacks. I have added comments to each patch. >> > > It looks like you were able to do quite a bit here with not much code - > nice! Thanks :) > Just FYI, I'll be working on a v5 of the hist triggers patchset that > will incorporate the stuff from patch 1 (needs to be split into a > separate patch for the triggers code already upstream, and one for hist > triggers) and your comments from patch 2 (see comments in my reply to > that patch), along with a couple other unrelated changes... Great to hear! cheers, daniel