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Low Level Tracing for Latency Analysis
Low Level Tracing for Latency Analysis From Baremetal to Hardware Tracing Blocks Suchakrapani Datt Sharma & Thomas Bertauld Oct 12, 2016 École Polytechnique de Montréal Laboratoire DORSAL whoami Suchakra ● PhD student, Computer Engineering (Prof Michel Dagenais) DORSAL Lab, École Polytechnique de Montréal – UdeM ● Works on debugging, tracing and trace aggregation (LTTng, eBPF), hardware tracing and VMs. ● Loves poutine, samosas and bikes POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma whoami Thomas ● MSc student, Computer Engineering (Prof Michel Dagenais) DORSAL Lab, École Polytechnique de Montréal – UdeM ● Worked on embedded systems tracing, baremetal systems, trace analysis and now in financial-tech domain ● Loves computer games POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma Agenda Latency ● Introduction ● Tools and techniques Hardware Tracing ● Intel Processor Trace ● ARM CoreSight ● Hardware trace based analysis Baremetal Tracing ● Heterogeneous system challenges ● Low level traces with barectf POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma Latency POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma SS ncy Super Complex Stuff Late S POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma SS S POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma SS S Hardware Interrupt POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma Delay between interrupt and do_IRQ() SS S Hardware Interrupt Interrupt Handler POLYTECHNIQUE MONTREAL – Suchakrapani Datt Sharma Delay between interrupt and Interrupt do_IRQ() Handler Delay SS S Hardware Interrupt Interrupt -
Christopher Fabritius
Cand. Merc. Management of Innovation and Business Development Innovation and Organizational Economics Master’s Thesis Christopher Fabritius Strategic dimensions for open source competition - Appropriating value in a weak appropriablity regime Pages: 72 Standard pages: 60.21 Christopher Fabritius Supervisor: Jens Frøslev Institute: INO Copenhagen Business School, December 2009 Abstract Purpose Firstly, to place open source business models in a theoretical framework. Secondly, to identify generic complementary assets that are essential for the ability of open source firms to compete. Lastly, to relate the individual assets to the properties of open source licensing and software business models. Design/methodology/approach An empirical approach that questions assumptions of existing theory. This is achieved through an examination of the mechanisms and unique characteristics of open source software, and how these influence business models with special regards to complementary assets. Using the findings from “Profiting from Technological Innovation” by David Teece and other key theorists to outline the interaction between complementary assets and available product markets. Finally, empirical data is used to identify and closely examine core complementary assets in weak appropriability regimes. Findings Copyright legislation is used to ensure innovation through forcing openness of the technology in contrast to the traditional opposite approach. Teece can be used to place open source business models in a familiar framework, defining open source as a weak appropriability regime. Though subject to a peculiar set of rules regarding technology and innovation, open source business is fundamentally “business as usual” when approached from a strategic perspective. It is the constellation of complementary assets in combination with select product markets that enables the unique competitive position for players and defines business models. -
Enlightening the I/O Path: a Holistic Approach for Application Performance
Enlightening the I/O Path: A Holistic Approach for Application Performance Sangwook Kim, Apposha and Sungkyunkwan University; Hwanju Kim, Sungkyunkwan University and Dell EMC; Joonwon Lee and Jinkyu Jeong, Sungkyunkwan University https://www.usenix.org/conference/fast17/technical-sessions/presentation/kim-sangwook This paper is included in the Proceedings of the 15th USENIX Conference on File and Storage Technologies (FAST ’17). February 27–March 2, 2017 • Santa Clara, CA, USA ISBN 978-1-931971-36-2 Open access to the Proceedings of the 15th USENIX Conference on File and Storage Technologies is sponsored by USENIX. Enlightening the I/O Path: A Holistic Approach for Application Performance Sangwook Kim†§, Hwanju Kim§,∗ Joonwon Lee§, Jinkyu Jeong§ †Apposha, §Sungkyunkwan University [email protected], [email protected], [email protected], [email protected] Abstract main reason for this form of structuring is to reduce re- quest handling latency by taking off the internal activ- In data-intensive applications, such as databases and key- ities from the critical path of request execution. How- value stores, reducing the request handling latency is im- ever, background tasks are still interfering foreground portant for providing better data services. In such appli- tasks since they inherently share the I/O path in a stor- cations, I/O-intensive background tasks, such as check- age stack. For example, background checkpointing in pointing, are the major culprit in worsening the latency relational database has known to hinder delivering low due to the contention in shared I/O stack and storage. and predictable transaction latency, but the database and To minimize the contention, properly prioritizing I/Os operating system (OS) communities have no reasonable is crucial but the effectiveness of existing approaches is solution despite their collaborative efforts [12]. -
Oracle Solaris 11 Express What's
ORACLE SOLARIS 11 EXPRESS 2010.11 | WHAT’S NEW ORACLE SOLARIS 11 EXPRESS 2010.11 WHAT’S NEW Oracle Solaris is the industry leading operating system for the enterprise. Oracle Solaris 11 Express 2010.11 raises the bar on the innovation introduced in Oracle Solaris 10, with a unique feature set NEW FEATURE HIGHLIGHTS that few other operating systems can offer. Oracle Solaris 11 Express 2010.11 has been tested and • Oracle Solaris 10 Zones for business optimized for Oracle hardware and software, and is an integral part of Oracle's combined hardware investment protection and software portfolio. • Built-in network virtualization and resource Oracle Solaris 11 Express 2010.11 provides customers with the latest access to Oracle Solaris 11 management for enhanced server workload technology, allowing developers, architects and administrators to test and deploy within an consolidation enterprise environments and greatly simplify their day to day operations. Oracle Solaris 11 Express 2010.11 has the reliability, availability, and serviceability that you'd expect from a leading • Greatly reduced planned and unplanned downtime with new package management tools enterprise operating system. with safe system upgrade With new features such as network based package management tools to greatly decrease planned • New optimizations and features designed to system downtime and provide for a completely safe system upgrade, built-in network virtualization deliver proven scalability and reliability as an and resource control management for an unprecedented level of flexibility for application integrated component of Oracle's Exadata and consolidation, and on-disk ZFS encryption to provide the highest levels of security in your data Exalogic systems center, Oracle Solaris 11 Express 2010.11 is the most exciting release of the Oracle Solaris platform to date. -
History of Linux from Wikipedia, the Free Encyclopedia
History of Linux From Wikipedia, the free encyclopedia The history of Linux began in 1991 with the commencement of a personal project by Finnish student Linus Torvalds to create a new free operating system kernel. Since then, the resulting Linux kernel has been marked by constant growth throughout its history. Since the initial release of its source code in 1991, it has grown from a small number of C files under a license prohibiting commercial distribution to the 4.2.3 version in 2015 with more than 18 million lines of source code under the GNU General Public License v2.[1](p7)[2][3] Contents 1 Events leading to creation 2 The creation of Linux 3 Naming 4 Linux under the GNU GPL 5 GNU/Linux naming controversy 6 Official mascot 7 New development 7.1 Community 7.2 Open Source Development Lab and Linux Foundation 7.3 Companies 7.4 Desktop environments 8 "Linux is obsolete" 9 Competition from Microsoft 10 SCO 11 Trademark rights 12 Chronology 13 See also 14 References 15 External links Events leading to creation After AT&T had dropped out of the Multics project, the Unix operating system was conceived and implemented by Ken Thompson and Dennis Ritchie (both of AT&T Bell Laboratories) in 1969 and first released in 1970. Later they rewrote it in a new programming language, C, to make it portable. The availability and portability of Unix caused it to be widely adopted, copied and modified by academic institutions and businesses. In 1977, the Berkeley Software Distribution (BSD) was developed by the Computer Systems Research Group (CSRG) from UC Berkeley, based on the 6th edition of Unix from AT&T. -
Yocto Project and Embedded OS
Yocto Project and Jeffrey Osier-Mixon Embedded OS •What is the Yocto Project and why is it important? •Working with an open source collaborative project & community Kevin McGrath •Yocto Project concepts in a nutshell: environment, metadata, tools • Using Yocto cross-compiler • Running kernel via qemu th • Module installation, virtio, etc. July 28 2015 • Lessons learned, capabilities 11:00 PDT (GMT -7) 1 Yocto Project and Embedded OS Our guests Jeffrey Osier-Mixon: Jeff "Jefro" Osier-Mixon works for Intel Corporation in Intel's Open Source Technology Center, where his current role is community manager for the Yocto Project.. Jefro also works as a community architect and consultant for a number of open source projects and speaks regularly at open source conferences worldwide. He has been deeply involved with open source since the early 1990s. Kevin McGrath : Instructor at Oregon State University. I primarily teach the operating systems sequence and the senior capstone project sequence, but have taught architecture, assembly programming, introductory programming classes, and just about anything else that needs someone to teach it. While my background is in network security and high performance computing (computational physics), today I mostly live in the embedded space, leading to the “ECE wannabe” title in my department. Oleg Verge (Moderator): Technical Program Manager Intel Higher Education, System Engineer MCSE,CCNA, VCP Intel® IoT Developer Kit v1.0 Hardware components = + + Helpful Linux* tools (GCC tool chain, perf, oProfile, Software image + etc.), required drivers (Wi-Fi*, Bluetooth®, etc.), useful = API libraries, and daemons like LighttPD and Node.js. + Intel XDK Support for various IDEs = + + + For C/C++ For java, For Arduino* For Visual + node.js.,html5 sketches Programming Cloud services = Intel IoT Analytics includes capabilities for data collection, + storage, visualization, and analysis of sensor data. -
Rootfs Made Easy with Buildroot
Kernel Recipes 2013 Rootfs made easy with Buildroot How kernel developers can finally solve the rootfs problem. Thomas Petazzoni Bootlin [email protected] - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 1/1 Thomas Petazzoni I CTO and embedded Linux engineer at Bootlin I Embedded Linux development: kernel and driver development, system integration, boot time and power consumption optimization, consulting, etc. I Embedded Linux training, Linux driver development training and Android system development training, with materials freely available under a Creative Commons license. I We're hiring! I http://bootlin.com I Contributing the kernel support for the new Armada 370 and Armada XP ARM SoCs from Marvell (widely used in NAS devices). I Major contributor to Buildroot, an open-source, simple and fast embedded Linux build system I Living in Toulouse, south west of France - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 2/1 Doing kernel development is awesome, but... - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 3/1 A kernel without a root filesystem is kind of useless input: ImExPS/2 Generic Explorer Mouse as /devices/fpga:07/serio1/input/input1 Root-NFS: no NFS server address VFS: Unable to mount root fs via NFS, trying floppy. VFS: Cannot open root device "(null)" or unknown-block(2,0) Please append a correct "root=" boot option; here are the available partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 4/1 Solutions often used by kernel dev I A complete Linux distribution + Readily available - Large (can hardly be used as an initramfs) - Not available for all architectures - Not easy to customize. -
Microprocessor
Microprocessor A microprocessor is a computer processor that incorporates the functions of a central processing unit on a single integrated circuit (IC), or at most a few integrated circuits. The microprocessor is a multipurpose, clock driven, register based, digital-integrated circuit that accepts binary data as input, processes it according to instructions stored in its memory, and provides results as output. Microprocessors contain both combinational logic and sequential digital logic. Microprocessors operate on numbers and symbols represented in the binary numeral system. The integration of a whole CPU onto a single chip or on a few chips greatly reduced the cost of processing power, increasing efficiency. Integrated circuit processors are produced in large numbers by highly automated processes, resulting in a low per-unit cost. Single- chip processors increase reliability because there are many fewer electrical connections to fail. As microprocessor designs improve, the cost of manufacturing a chip (with smaller components built on a semiconductor chip the same size) generally stays the same. Before microprocessors, small computers had been built using racks of circuit boards with many medium- and small-scale integrated circuits. Microprocessors combined this into one or a few large-scale ICs. Continued increases in microprocessor capacity have since rendered other forms of computers almost completely obsolete (see history of computing hardware), with one or more microprocessors used in everything from the smallest embedded systems -
Linux Foundation Training & Certification
Linux Foundation Training & Certification April 2020 Agenda 1. The Linux Foundation (TLF or The LF) 2. Demand for Talent 3. Training and Certification 4. Why Certify with LFCS? Close with Q&A Intro to the Linux Foundation Linux Foundation History ˃ The Linux Foundation was started in 2000 under the Open Source Development Labs (OSDL) and became the organization it is today when OSDL merged with the Free Standards Group (FSG) in 2007. ˃ The Linux Foundation is home to the largest open source projects in the world and sponsors the work of Linux creator Linus Torvalds. ˃ The Linux Foundation is supported by leading technology firms and developers from around the world. ˃ The Linux Foundation provides infrastructure, legal management, events, training and certification, for open source projects in order grow and sustain them. 4 The Linux Foundation is creating the greatest shared technology investment in history by enabling open source collaboration across companies, developers, and users. We are the organization of choice to build ecosystems that accelerate open technology development and commercial adoption. Neutral home for the world's most important projects We host over 200 of the most critical open source projects accelerating open technology and commercial adoption. Our projects harness the power of open source development to fuel innovation at unmatched speed and scale. www.linuxfoundation.org/projects/ Linux has become the most important software in the world 99% 82% 2nd 90% 90% 62% #1 Supercomputer Smartphone To Windows Mainframe -
Yocto Project Application Developer's Guide Is for the 1.4.3 Release of the Yocto Project
Jessica Zhang, Intel Corporation <[email protected]> by Jessica Zhang Copyright © 2010-2014 Linux Foundation Permission is granted to copy, distribute and/or modify this document under the terms of the Creative Commons Attribution-Share Alike 2.0 UK: England & Wales [http://creativecommons.org/licenses/by-sa/2.0/uk/] as published by Creative Commons. Manual Notes • This version of the Yocto Project Application Developer's Guide is for the 1.4.3 release of the Yocto Project. To be sure you have the latest version of the manual for this release, go to the Yocto Project documentation page [http://www.yoctoproject.org/documentation] and select the manual from that site. Manuals from the site are more up-to-date than manuals derived from the Yocto Project released TAR files. • If you located this manual through a web search, the version of the manual might not be the one you want (e.g. the search might have returned a manual much older than the Yocto Project version with which you are working). You can see all Yocto Project major releases by visiting the Releases [https://wiki.yoctoproject.org/wiki/Releases] page. If you need a version of this manual for a different Yocto Project release, visit the Yocto Project documentation page [http://www.yoctoproject.org/ documentation] and select the manual set by using the "ACTIVE RELEASES DOCUMENTATION" or "DOCUMENTS ARCHIVE" pull-down menus. • To report any inaccuracies or problems with this manual, send an email to the Yocto Project discussion group at [email protected] or log into the freenode #yocto channel. -
Vorlage Für Dokumente Bei AI
OSS Disclosure Document Date: 27-Apr-2018 CM-AI/PJ-CC OSS Licenses used in Suzuki Project Page 1 Table of content 1 Overview ..................................................................................................................... 11 2 OSS Licenses used in the project ................................................................................... 11 3 Package details for OSS Licenses usage ........................................................................ 12 3.1 7 Zip - LZMA SDK ............................................................................................................. 12 3.2 ACL 2.2.51 ...................................................................................................................... 12 3.3 Alsa Libraries 1.0.27.2 ................................................................................................... 12 3.4 AES - Advanced Encryption Standard 1.0 ......................................................................... 12 3.5 Alsa Plugins 1.0.26 ........................................................................................................ 13 3.6 Alsa Utils 1.0.27.2 ......................................................................................................... 13 3.7 APMD 3.2.2 ................................................................................................................... 13 3.8 Atomic_ops .................................................................................................................... 13 3.9 Attr 2.4.46 ................................................................................................................... -
LKP-Tests Linux Kernel Performance Test Tool What Is LKP-Tests
LKP-tests Linux kernel performance test tool What is LKP-tests ● Framework to run benchmarks ○ Fetch/install the benchmarks ○ Prepare test environment ■ For example, format disk ○ Run benchmark with various parameters ■ Collect performance statistics ○ Benchmark/performance statistics parsing ● Framework for performance analysis ○ Result compare ● Used for benchmark running and reproducing regression captured by 0-Day Highlights ● Rich benchmarks support ● Capture performance statistics (monitors) in addition to benchmark score ○ For example, perf stat, perf profile, vmstat, etc. ● Compare/analyze all performance statistics data (benchmark and monitors) ○ Unified data model Benchmarks ● Integrated ~50 benchmarks ○ Fetch/install benchmarks ○ Run benchmarks with various parameters ○ Parse result of benchmarks ● Mostly micro-benchmarks, several macro-benchmarks ● Mostly server workload Benchmark List - 1 ● Scheduler ○ Hackbench, perf-bench-sched-pipe, etc. ● File system/IO ○ Fio, fsmark, iozone, dbench, dd, fileio, postmark, etc. ● Network ○ Netperf, iperf, apachebench, ku-latency, nepim, netpipe, nuttcp, qperf, siege, sockperf, stutter, tbench, thrulay, etc. ● Scalability ○ Reaim, aim7, will-it-scale, etc. ● Memory management ○ vm-scalability, chromeswap, exit_free, pft, perf-bench-numa-mem, pmbench, swapin, tlbflush, etc. Benchmark List - 2 ● Database ○ Pgbench, oltp, etc. ● Noise ○ Ftq, fwq, etc. ● HPC ○ Hpcc, linpack ● Workload emulation ○ Blogbench, ebizzy (web application server), kbuild, pbzip2, pigz, pixz, plzip, pxz, etc. ● Others