Intel® Inspector 2021 Release Notes
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Hang Analysis: Fighting Responsiveness Bugs
Hang Analysis: Fighting Responsiveness Bugs Xi Wang† Zhenyu Guo‡ Xuezheng Liu‡ Zhilei Xu† Haoxiang Lin‡ Xiaoge Wang† Zheng Zhang‡ †Tsinghua University ‡Microsoft Research Asia Abstract return to life. However, during the long wait, the user can neither Soft hang is an action that was expected to respond instantly but in- cancel the operation nor close the application. The user may have stead drives an application into a coma. While the application usu- to kill the application or even reboot the computer. ally responds eventually, users cannot issue other requests while The problem of “not responding” is widespread. In our expe- waiting. Such hang problems are widespread in productivity tools rience, hang has occurred in everyday productivity tools, such as such as desktop applications; similar issues arise in server programs office suites, web browsers and source control clients. The actions as well. Hang problems arise because the software contains block- that trigger the hang issues are often the ones that users expect to re- ing or time-consuming operations in graphical user interface (GUI) turn instantly, such as opening a file or connecting to a printer. As and other time-critical call paths that should not. shown in Figure 1(a), TortoiseSVN repository browser becomes unresponsive when a user clicks to expand a directory node of a This paper proposes HANGWIZ to find hang bugs in source code, which are difficult to eliminate before release by testing, remote source repository. The causes of “not responding” bugs may be complicated. An as they often depend on a user’s environment. HANGWIZ finds hang bugs by finding hang points: an invocation that is expected erroneous program that becomes unresponsive may contain dead- to complete quickly, such as a GUI action, but calls a blocking locks (Engler and Ashcraft 2003; Williams et al. -
What Is an Operating System III 2.1 Compnents II an Operating System
Page 1 of 6 What is an Operating System III 2.1 Compnents II An operating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function. Memory management Among other things, a multiprogramming operating system kernel must be responsible for managing all system memory which is currently in use by programs. This ensures that a program does not interfere with memory already in use by another program. Since programs time share, each program must have independent access to memory. Cooperative memory management, used by many early operating systems, assumes that all programs make voluntary use of the kernel's memory manager, and do not exceed their allocated memory. This system of memory management is almost never seen any more, since programs often contain bugs which can cause them to exceed their allocated memory. If a program fails, it may cause memory used by one or more other programs to be affected or overwritten. Malicious programs or viruses may purposefully alter another program's memory, or may affect the operation of the operating system itself. With cooperative memory management, it takes only one misbehaved program to crash the system. Memory protection enables the kernel to limit a process' access to the computer's memory. Various methods of memory protection exist, including memory segmentation and paging. All methods require some level of hardware support (such as the 80286 MMU), which doesn't exist in all computers. -
Introduction to Intel Performance Tools Part
Introduction to Intel Performance Tools Part 1/2 Doug Roberts SHARCNET / COMPUTE CANADA Intel® Performance Tools o Intel Advisor - Optimize Vectorization and Thread Prototyping for C, C++, Fortran o Intel Inspector - Easy-to-use Memory and Threading Error Debugger for C, C++, Fortran o Intel Vtune Amplifier - Serial/Threaded Performance Profiler for C, C++, Fortran, Mixed Python o Intel Trace Analyzer and Collector - Understand MPI application behavior for C, C++, Fortran, OpenSHMEM o Intel Distribution for Python - High-performance Python powered by native Intel Performance Libraries Intel® Parallel Studio XE – Cluster Edition https://software.intel.com/en-us/parallel-studio-xe o Intel Advisor* https://software.intel.com/en-us/intel-advisor-xe o Intel Inspector* https://software.intel.com/en-us/intel-inspector-xe o Intel Vtune Amplifier* https://software.intel.com/en-us/intel-vtune-amplifier-xe o Intel Trace Analyzer and Collector* https://software.intel.com/en-us/intel-trace-analyzer o Intel Distribution for Python https://software.intel.com/en-us/distribution-for-python * Product Support → Training, Docs, Faq, Code Samples Initializating the Components – The Intel Way ssh graham.sharcnet.ca cd /opt/software/intel/18.0.1/parallel_studio_xe_2018.1.038 source psxevars.sh → linux/bin/compilervars.sh → clck_2018/bin/clckvars.sh → itac_2018/bin/itacvars.sh → inspector_2018/inspxe-vars.sh → vtune_amplifier_2018/amplxe-vars.sh → advisor_2018/advixe-vars.sh Examples ls /opt/software/intel/18.0.1/parallel_studio_xe_2018.1.038/samples_2018/en -
Intel® Software Products Highlights and Best Practices
Intel® Software Products Highlights and Best Practices Edmund Preiss Business Development Manager Entdecken Sie weitere interessante Artikel und News zum Thema auf all-electronics.de! Hier klicken & informieren! Agenda • Key enhancements and highlights since ISTEP’11 • Industry segments using Intel® Software Development Products • Customer Demo and Best Practices Copyright© 2012, Intel Corporation. All rights reserved. 2 *Other brands and names are the property of their respective owners. Key enhancements & highlights since ISTEP’11 3 All in One -- Intel® Cluster Studio XE 2012 Analysis & Correctness Tools Shared & Distributed Memory Application Development Intel Cluster Studio XE supports: -Shared Memory Processing MPI Libraries & Tools -Distributed Memory Processing Compilers & Libraries Programming Models -Hybrid Processing Copyright© 2012, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners. Intel® VTune™ Amplifier XE New VTune Amplifier XE features very well received by Software Developers Key reasons : • More intuitive – Improved GUI points to application inefficiencies • Preconfigured & customizable analysis profiles • Timeline View highlights concurrency issues • New Event/PC counter ratio analysis concept easy to grasp Copyright© 2012, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners. Intel® VTune™ Amplifier XE The Old Way versus The New Way The Old Way: To see if there is an issue with branch misprediction, multiply event value (86,400,000) by 14 cycles, then divide by CPU_CLK_UNHALTED.THREAD (5,214,000,000). Then compare the resulting value to a threshold. If it is too high, investigate. The New Way: Look at the Branch Mispredict metric, and see if any cells are pink. -
Mac OS X: an Introduction for Support Providers
Mac OS X: An Introduction for Support Providers Course Information Purpose of Course Mac OS X is the next-generation Macintosh operating system, utilizing a highly robust UNIX core with a brand new simplified user experience. It is the first successful attempt to provide a fully-functional graphical user experience in such an implementation without requiring the user to know or understand UNIX. This course is designed to provide a theoretical foundation for support providers seeking to provide user support for Mac OS X. It assumes the student has performed this role for Mac OS 9, and seeks to ground the student in Mac OS X using Mac OS 9 terms and concepts. Author: Robert Dorsett, manager, AppleCare Product Training & Readiness. Module Length: 2 hours Audience: Phone support, Apple Solutions Experts, Service Providers. Prerequisites: Experience supporting Mac OS 9 Course map: Operating Systems 101 Mac OS 9 and Cooperative Multitasking Mac OS X: Pre-emptive Multitasking and Protected Memory. Mac OS X: Symmetric Multiprocessing Components of Mac OS X The Layered Approach Darwin Core Services Graphics Services Application Environments Aqua Useful Mac OS X Jargon Bundles Frameworks Umbrella Frameworks Mac OS X Installation Initialization Options Installation Options Version 1.0 Copyright © 2001 by Apple Computer, Inc. All Rights Reserved. 1 Startup Keys Mac OS X Setup Assistant Mac OS 9 and Classic Standard Directory Names Quick Answers: Where do my __________ go? More Directory Names A Word on Paths Security UNIX and security Multiple user implementation Root Old Stuff in New Terms INITs in Mac OS X Fonts FKEYs Printing from Mac OS X Disk First Aid and Drive Setup Startup Items Mac OS 9 Control Panels and Functionality mapped to Mac OS X New Stuff to Check Out Review Questions Review Answers Further Reading Change history: 3/19/01: Removed comment about UFS volumes not being selectable by Startup Disk. -
Intel® Inspector XE 2013
MEMORY AND THREAD DEBUGGER Product Brief Intel® Inspector XE 2013 Top Features Deliver More Reliable Applications . Inspect C, C++, C# and Fortran Intel® Inspector XE 2013 is an easy to use dynamic memory and threading error detector for . No special builds required. Use Windows* and Linux*. Enhance productivity, cut cost and speed time-to-market. your normal compiler and build. Find memory and threading defects early in the development cycle. The earlier an error is . Inspects all code, even if the found, the lower the cost. Intel Inspector XE makes it easy to find and diagnose errors early. source is unavailable . Highlights the error at multiple Find errors that traditional regression testing and static analysis miss. Intel Inspector XE source code locations, provides finds latent errors on the executed code path plus intermittent and non-deterministic errors, corresponding call stacks even if the error-causing timing scenario does not happen. New! Debugger breakpoints for easier diagnosis of difficult bugs Memory Errors Threading Errors . New! Heap growth analysis finds . Memory leaks . Data races cause of heap growth in a . Memory corruption and Illegal Accesses - Heap races problematic region . Allocation / de-allocation API mismatches - Stack races . Inconsistent memory API usage . Deadlocks “We struggled for a week with a crash situation, the corruption was C, C++, C# and Fortran. Or any mix. Is your GUI in C# with performance sensitive code in C++? identified but the source was Got legacy code in Fortran? Using libraries without the source? No problem, it all works. really hard to find. Then we ran Dynamic instrumentation enables inspection of all code including third party libraries where the Intel® Inspector XE and source is not available. -
Recovering from Operating System Crashes
Recovering from Operating System Crashes Francis David Daniel Chen Department of Computer Science Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign University of Illinois at Urbana-Champaign Urbana, USA Urbana, USA Email: [email protected] Email: [email protected] Abstract— When an operating system crashes and hangs, it timers and processor support techniques [12] are required to leaves the machine in an unusable state. All currently running detect such crashes. program state and data is lost. The usual solution is to reboot the It is accepted behavior that when an operating system machine and restart user programs. However, it is possible that after a crash, user program state and most operating system state crashes, all currently running user programs and data in is still in memory and hopefully, not corrupted. In this project, volatile memory is lost and unrecoverable because the proces- we use a watchdog timer to reset the processor on an operating sor halts and the system needs to be rebooted. This is inspite system crash. We have modified the Linux kernel and added of the fact that all of this information is available in volatile a recovery routine that is called instead of the normal boot up memory as long as there is no power failure. This paper function when the processor is reset by a watchdog. This resumes execution of user processes after killing the process that was explores the possibility of recovering the operating system executing when the watchdog fired. We have implemented this using the contents of memory in order to resume execution on the ARM architecture and we use a periodic watchdog kick of user programs without any data loss. -
Intel® Inspector for Systems
Intel® Inspector for Systems 1 Agenda 1. Intro to Intel® Inspector 2. The Inspector workflow and walk thru 3. Dynamic Memory and Threading Analysis 4. Static Analysis 5. Readying your sources and builds 6. Managing analysis results 7. Team collaboration 8. Advanced features Copyright© 2013, Intel Corporation. All rights reserved. 2 *Other brands and names are the property of their respective owners. Intel® Inspector Is a debugging tool for threaded software. It is also called as a “Correctness Analyzer”. Has an intuitive GUI. Provides powerful results management, navigation and filtering! Easy to use one-click help for diagnostics (Possible causes and solution suggestions) Finds threading bugs in OpenMP*, CilkTM Plus, Intel® Threading Building Blocks, Win32* and Posix Threads threaded software Locates bugs quickly that can take days to find using traditional methods and tools – Isolates problems, not the symptoms – Bug does not have to occur to find it! Intel® Inspector has a comprehensive portfolio of analyses and an easy to use GUI for effective and efficient results management. Copyright© 2013, Intel Corporation. All rights reserved. 3 *Other brands and names are the property of their respective owners. Motivation for The Inspector Where are my application’s… Memory Errors Threading Errors Security Errors • Invalid Accesses • Races • Buffer overflows and • Memory Leaks • Deadlocks underflows • Uninitialized Memory • Cross Stack References • Incorrect pointer usage Accesses • Over 250 error types… • Developing threaded applications can be complex and expensive • New class of correctness problems are caused by the interaction between concurrent threads Multi-threading problems are hard to reproduce, difficult to debug and expensive to fix! 4 Copyright© 2013, Intel Corporation. -
Intel® Parallel Studio XE 2020 Update 2 Release Notes
Intel® Parallel StudIo Xe 2020 uPdate 2 15 July 2020 Contents 1 Introduction ................................................................................................................................................... 2 2 Product Contents ......................................................................................................................................... 3 2.1 Additional Information for Intel-provided Debug Solutions ..................................................... 4 2.2 Microsoft Visual Studio Shell Deprecation ....................................................................................... 4 2.3 Intel® Software Manager ........................................................................................................................... 5 2.4 Supported and Unsupported Versions .............................................................................................. 5 3 What’s New ..................................................................................................................................................... 5 3.1 Intel® Xeon Phi™ Product Family Updates ...................................................................................... 12 4 System Requirements ............................................................................................................................. 13 4.1 Processor Requirements........................................................................................................................ 13 4.2 Disk Space Requirements ..................................................................................................................... -
Thread & Memory Debugger
Thread & Memory Debugger Klaus-Dieter Oertel Intel IAGS HLRN User Workshop, 3-6 Nov 2020 Optimization Notice Copyright © 2020, Intel Corporation. All rights reserved. *Other names and brands may be claimed as the property of others. Debug Memory & Threading Errors Intel® Inspector Find and eliminate errors ▪ Memory leaks, invalid access… ▪ Races & deadlocks ▪ C, C++ and Fortran (or a mix) Simple, Reliable, Accurate ▪ No special recompiles Use any build, any compiler1 Clicking an error instantly displays source ▪ Analyzes dynamically generated or linked code code snippets and the call stack ▪ Inspects 3rd party libraries without source ▪ Productive user interface + debugger integration Fits your existing ▪ Command line for automated regression analysis process Optimization Notice 1That follows common OS standards. Copyright © 2020, Intel Corporation. All rights reserved. 3 *Other names and brands may be claimed as the property of others. Race Conditions Are Difficult to Diagnose They only occur occasionally and are difficult to reproduce Correct Incorrect Shared Shared Thread 1 Thread 2 Thread 1 Thread 2 Counter Counter 0 0 Read count 0 Read count 0 Increment 0 Read count 0 Write count ➔ 1 Increment 0 Read count 1 Increment 0 Increment 1 Write count ➔ 1 Write count ➔ 2 Write count ➔ 1 Optimization Notice Copyright © 2020, Intel Corporation. All rights reserved. 4 *Other names and brands may be claimed as the property of others. Deliver More Reliable Applications Intel® Inspector and Intel® Compiler Intel® Inspector Memory Errors Threading Errors ▪ Dynamic instrumentation ▪ No special builds ▪ Any compiler1 • Invalid Accesses • Races ▪ Source not required • Memory Leaks • Deadlocks • Uninit. Memory Accesses • Cross Stack References Intel® Compiler Pointer Errors ▪ Pointer checker • Out of bounds accesses • Dangling pointers ▪ Run time checks ▪ C, C++ Find errors earlier with less effort 1That follows common OS standards. -
Intel® Inspector XE 2013 an Introduction
Intel® Inspector XE 2013 An Introduction Holly Wilper March 1, 2013 Agenda 1. Intro to Intel® Inspector XE 2. The Inspector XE workflow and walk thru 3. Dynamic Memory and Threading Analysis 4. Static Analysis 5. Readying your sources and builds 6. Managing analysis results 7. Team collaboration 8. Advanced features 2 Copyright© 2013, Intel Corporation. All rights reserved. 2/28/2013 *Other brands and names are the property of their respective owners. Intel® Inspector XE Is a debugging tool for software. “Correctness Analyzer” Has an intuitive GUI. Provides powerful results management, navigation, and filtering. Easy to use one-click help for diagnostics (Possible causes and solution suggestions) Finds threading bugs in OpenMP*, CilkTM Plus, Intel® Threading Building Blocks, Win32* and Posix Threads threaded software Locates bugs quickly that can take days to find using traditional methods and tools – Isolates problems, not the symptoms – Bug does not have to occur to find it! The Inspector XE has a comprehensive portfolio of analyses and an easy to use GUI for effective and efficient results management. 3 Copyright© 2013, Intel Corporation. All rights reserved. 2/28/2013 *Other brands and names are the property of their respective owners. Motivation for Inspector XE Where are my application’s… Memory Errors Threading Errors Security Errors • Invalid Accesses • Races • Buffer overflows and • Memory Leaks • Deadlocks underflows • Uninitialized Memory • Cross Stack References • Incorrect pointer usage Accesses • Over 250 error types… • Developing threaded applications can be complex and expensive • New class of correctness problems are caused by the interaction between concurrent threads Multi-threading problems are hard to reproduce, difficult to debug and expensive to fix! 4 Copyright© 2013, Intel Corporation. -
How to Use Microsoft Adplus to Capture Hang and Crash Logs for EFT Server
How to use Microsoft ADPlus to capture hang and crash logs for EFT Server THE INFORMATION IN THIS ARTICLE APPLIES TO: • EFT v6 and later DISCUSSION In order for support to properly determine root cause of a crash or hang of EFT Server, the client must be able to provide a crash dump or a hang dump. This article describes the following procedures: 1. How to use Microsoft ADPlus to capture hang and crash logs. 2. Collect a hang/crash dump. 3. Create and submit a case to support. IMPORTANT: Use of ADPlus to monitor crashes requires an active login on the system. Logging off will kill the ADPlus application. This can run while the server is locked, but user must NOT log off while using this. You will also need to disable any automatic restarting of the EFT service to ensure that the dump files can be collected properly. Confirm if you are experiencing a Hang or a Crash • A Hang is when the process (cftpstes.exe) is still running in task Manager but EFT does not respond to FTP/SSH/HTTP connections. It may also not respond to Administrator requests through COM or through the Administrator Interface. • A Crash is when the process (cftpstes.exe) is no longer running in Task Manager. Download ADPlus Download the 32-bit version of ADPlus from the URL below to capture the Crash or Hang dump. https://support.microsoft.com/en-us/help/286350/how-to-use-adplus-vbs-to-troubleshoot-hangs-and-crashes **Although there is a 64-bit version of ADPLUS, you MUST use the 32-bit version regardless of OS, as EFT is a 32-bit process** How to use Microsoft ADPlus to capture hang and crash logs for EFT Server Install ADPLUS Install ADPLUS, choosing the "custom" option, in the following folder: C:\dbtools Once ADP is installed, create the following folder: C:\ADPlusOutput For an Application Hang If you are investigating a hang, then the adplus.bat file should only be run when the system is hanging.