Steven has given over 80 talks around the world, has. He has been working on the linux kernel professionally since 2001. Steven rostedt has years of experience as a professional in computer science. Before joining vmware, steven rostedt worked at redhat for 10 years on the realtime linux kernel. Todo benchmark with mainline because nouveau is broken for me vsnprintf changes make the code slower exactly main point of this exercise. The kernel seems configured to use 64mb of ram, and to be patched with steven rostedts realtime patches. Currently steven works for vmware as an open source engineer, promoting open source both inside and outside the company. Now he dabbles in other areas, such as working on the user interface, maintaining patches and continuous. At a linux conference in dusseldorf, 2014, i saw a talk by kernel maintainer steven rostedt that answered both questions. For various reasons ive often needed to use ftrace instead. Steven rostedt learning the linux kernel with tracing openfest bulgaria. It implements earliest deadline first edf along with a constant bandwidth scheduler cbs that is used to give applications a guaranteed amount of cpu for a periodic time frame.
Jan 16, 20 steven rostedt, working at red hat, talks about realtime linux at the embedded linux conference europe, in spain on november 6, 2012. Ftrace appeared selection from mastering embedded linux programming book. Kernel recipes 2017 understanding the linux kernel via ftrace steven rostedt. Steve rostedt is a linux developer and maintainer of the realtime patch which enables linux to be embedded in mission critical applications such as automobiles, robots, and the trading desks of stock exchanges. Kernel recipes 2017 understanding the linux kernel via. Steven rostedt learning the linux kernel with tracing duration. Understanding the linux kernel via ftrace kernel recipes.
Intro to realtime linux for embedded developers the. Adapted to the download directory at, removed dead links to fedora prebuilt kernels. Laura abbott with steven rostedt vmware, greg kroahhartman linux foundation, tim bird sony the linux foundation technical advisory board tab is an elected group designed to represent the kernel communitys interests as part of the linux foundation. Oct 29, 2012 steven rostedt works for red hat and maintains the stable linux kernel releases of the realtime patch. Oct, 2016 steven has some c code that does this, but its not nice. Standalone repo to test converting sql commands into linux. He was employed with timesys porting linux to various mips, powerpc, and arm boards as well as adapting the changes to the linux kernel for their needs. Announcerfc tracecmd command line reader for ftrace since using echo and cat can sometimes be annoying to set up the tracer, ive been asked several times if i. Steven is still very active in developing new features for linux as well as getting involved in the community. View steven rostedts profile on linkedin, the worlds largest professional community. Steven has been working on the linux kernel since 1998 started while working on his masters. Oct 07, 2017 kernel recipes 2017 understanding the linux kernel via ftrace steven rostedt. See the complete profile on linkedin and discover stevens. Work on the real time linux kernel supplied by red hat.
More than just tracing steven rostedt, red hat posted on october 15, 2014 by arnout vandecappelle leave a comment this talk has a lot of information in the slides, so refer to them. Im an open source advocate and try to communicate to people what that means. A quick introduction to some tools like tracecmd and kernelshark will also be demonstrated. Steven rostedt, open source programmer at vmware, maintains the real time stable releases of the linux kernel, among other things.
Im on the linux foundations technical advisory board tab and was on the linux plumbers programming committee. In this interview, part of our ongoing series on linux kernel developers, steven explains how his career took him from lockheed martin to tinkering with the linux kernel, to landing his first kernel job at a startup. Posted on october 15, 2014 by arnout vandecappelle leave a comment. He is part of the linux foundation technical advisory board, and on the linux plumbers program committee. Working with companies like ge, ibm, loral, martin marietta, lockheed martin and siemens germany. Introducing ftrace the kernel function tracer, ftrace, evolved from work done by steven rostedt, and many others, as they were tracking down the causes of high latency. Facebook gives people the power to share and makes the world more open and connected. Steven has some c code that does this, but its not nice. Steven rostedt learning the linux kernel with tracing. I partake in a lot of the linux foundation events as well as kernel recipes, linux plumbers, sometimes linux tag and other events. Join facebook to connect with steven rostedt and others you may know. The longest night of the year is upon us, and what better thing to do than get yourself some nice mulled wine, sit back, relax, and play. Aug 21, 2019 laura abbott with steven rostedt vmware, greg kroahhartman linux foundation, tim bird sony the linux foundation technical advisory board tab is an elected group designed to represent the kernel communitys interests as part of the linux foundation. Matt mackall created a nice utility to automatically download various kernel patches and update kernels with his utility ketchup.
The rt patch steven rostedt over the past few years, there has been a large effort in the linux community to convert the linux kernel into a true selection from building embedded linux systems, 2nd edition book. Introducing ftrace mastering embedded linux programming. Steven rostedt works for red hat and maintains the stable linux kernel releases of the realtime patch. If you can work with linux, than using the rt patch is no different. Jun 03, 20 see how a linux kernel developer lives, works and plays. Apr 05, 2018 steven rostedt, open source programmer at vmware, maintains the real time stable releases of the linux kernel, among other things. Introducing ftrace mastering embedded linux programming book. Up until then, the kernel could enable function tracing using either gccs pg flag or a combination of pg and mfentry.
Steven rostedt wanted to do a little housekeeping, specifically with the function tracing code used in debugging the kernel. Rt patch for celleb patch status and performance measurements. This tool collection is in some ways a demonstration of hidden linux features using ftrace. Enable realtime capabilities of the mainline kernel. Steven is now leading a development to rewrite kernelshark and extend it beyond just the linux kernel. Since 2004, steven worked on slowly turning the linux kernel into a realtime operating system. Steven rostedt learning the linux kernel with tracing youtube. Jul 17, 2009 announcerfc tracecmd command line reader for ftrace since using echo and cat can sometimes be annoying to set up the tracer, ive been asked several times if i could come up with a tool to do it for.
Enable realtime capabilities of the mainline kernel carsten emde revision history revision 0. Jan 14, 2020 for various reasons ive often needed to use ftrace instead. This automatically downloads and installs the kernel as well as applies the rt patch. Now he dabbles in other areas, such as working on the user interface, maintaining patches and continuous development for ftrace, the official tracer of. Two kernel mysteries and the most technical talk ive ever seen. Linux is a posixunixlike system, so realtime tasks are supported by means of the well established and powerful techniques of fixed priority. These releases typically occur every nine to ten weeks, and each one contains the work of more than 1,600 developers representing over 200 corporations, according to the 2017 linux kernel development report, written by jonathan. Linux kernel developer steven rostedt maintains the real time stable releases of the linux kernel.
Steven rostedt, working at red hat, talks about realtime linux at the embedded linux conference europe, in spain on november 6, 2012. Steven has given talks all over the world on various aspects of linux. Timer drivers for clock events hpet, pm timer, tsc exists today in current mainline, with no other purpose as to annotate what locks are. Intro to realtime linux for embedded developers the linux. See how a linux kernel developer lives, works and plays. This talk has a lot of information in the slides, so refer to them. Although its original name, function tracer, came from ftraces ability to record information related to various function calls performed while the kernel is running, ftraces tracing capabilities cover a much broader range of kernels internal operations.
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