LTTng Documentation — LTTng. Last update: 2. 5 July 2. Welcome! Welcome to the LTTng Documentation! The Linux Trace Toolkit: next generation is an open source software. Linux kernel, user. LTTng consists of. ![]() If you decide to change your configure options after installation, you'll need to re-run the configure, make, and make install steps. You only need to. ![]() Kernel modules to trace the Linux kernel. Shared libraries to trace user applications written in C or C++. Java packages to trace Java applications which use java. Apache log. 4j 1. A Python package to trace Python applications which use the standard. A kernel module to trace shell scripts and other user applications. ![]() Daemons and a command- line tool, lttng, to control the. LTTng tracers. Open source documentation. Note: This is an open documentation: its source is available in a. Git repository. Should you find any error in the content of this text, any grammatical. Git. Hub issue for it or, even better, contribute a patch to this. Target audience. The material of this documentation is appropriate for intermediate to. This FAQ gives some background and discussion for frequently encountered problems with the ncurses library, the terminal database and applications. This guide explains how to install VirtualBox 5.1 on RHEL/CentOS/Fedora and Debian/Ubuntu/Linux Mint using virtualbox own official repositories. Let's say i have 20 users logged on my linux box. How can I know how much memory each of them is using? Linux environment and. LTTng is also worth a. If you do not have a programming background, you may wish to skip. What’s in this documentation? The LTTng Documentation is divided into the following sections: Nuts and bolts explains the. LTTng project. You can skip this section if you’re familiar with software tracing and. LTTng project. Installation describes the steps to. LTTng packages on common Linux distributions and from. You can skip this section if you already properly installed LTTng on. Quick start is a concise guide to. LTTng kernel and user space tracing. We recommend this section if you’re new to LTTng or to software tracing. You can skip this section if you’re not new to LTTng. Core concepts explains the concepts at. LTTng. It’s a good idea to become familiar with the core concepts. Components of LTTng describes the various components. LTTng machinery, like the daemons, the libraries, and the. Instrumentation shows different ways to. Linux kernel. Instrumenting source code is essential to provide a meaningful. You can skip this section if you do not have a programming background. Tracing control is divided into topics. LTTng 2. 9 offers. Reference contains reference tables. Glossary is a specialized dictionary of terms related. LTTng or to the field of software tracing. Convention. Function names, parameter names, variable names, command names, argument. An italic. word within such a block is a placeholder, usually described in the. Practical tips and notes are given throughout the document using the. Tip: Make sure you read the tips. Terminal boxes are used to show command lines: $. Command line as a regular user. Command line as a priviledged user. Command lines which you need to execute as a priviledged user start with. Other command lines start with the $. Acknowledgements. A few people made the online LTTng Documentation possible. Philippe Proulx wrote most of the content, created. He is the current maintainer. LTTng Documentation. Daniel U. Thibault, from the DRDC, wrote. The Linux Trace Toolkit Next Generation — A. Comprehensive User’s Guide (version 2. Core concepts and. Components of LTTng sections and for a few passages here. The entire Effici. OS team made essential reviews. We sincerely thank everyone who helped enhance the quality of this. LTTng 2. 9 bears the name Joannès. A Berliner Weisse style. Trèfle Noir microbrewery in. Rouyn- Noranda, the. Témiscamingue. New features and changes in LTTng 2. Tracing control. User space tracing. Improved performance (tested on x. ARMv. 7- A. (Cubieboard). New helper library (liblttng- ust- fd) to help with. BSD’s closeall(). More accurate dynamic linker instrumentation and. New ctf_*() field definition macros (see lttng- ust(3)). New lttng_ust_loaded weak symbol defined by liblttng- ust for. LTTng- UST shared library is loaded. LTTng- UST is loaded!"); }else{puts("LTTng- UST is not loaded!"); }return. LTTng- UST thread names have the - ust suffix. Linux kernel tracing. Improved performance (tested on x. ARMv. 7- A. (Cubieboard). New enumeration field definition macros. IPv. 4, IPv. 6, and TCP header data is recorded in the event records. Detailed system call event records: select, pselect. LTTng- modules, and accept. New I²C instrumentation: the extract_sensitive_payload parameter. LTTng module controls whether or not. I²C messages are recorded in I²C event records, since. When the LTTng kernel modules are built into the Linux kernel image. CONFIG_TRACEPOINTS configuration option is automatically. What is LTTng? As its name suggests, the Linux Trace Toolkit: next. Linux systems and. So your first question might be. As the history of software engineering progressed and led to what. Linux—the authors of such. One major achievement in this field is, inarguably, the. GNU debugger (GDB). But even the best. A profiler is often the tool of choice to identify performance. Profiling is suitable to identify where performance is. The profiler outputs a profile, a statistical. However, a profiler won’t. Bottlenecks. might only occur when specific conditions are met, conditions that are. For a thorough investigation of software. This. is where tracing comes in handy. Tracing is a technique used to understand what goes on in a running. The software used for tracing is called a tracer. When recording. specific instrumentation points placed in the software source code. You. can trace user applications and the operating system at the same time. Tracing is often compared to logging. However, tracers and loggers are. Tracers are. designed to record much lower- level events that occur much more. Logging is more appropriate. Simply put. logging is one of the many use cases that can be satisfied with tracing. The list of recorded events inside a trace file can be read manually. Trace viewers and analyzers are specialized tools. In the end, this is what LTTng is: a powerful, open source set of. Linux kernel and user applications at the same time. LTTng is composed of several components actively maintained and. Excluding proprietary solutions, a few competing software tracers. Linux: dtrace. 4linux is a port of. Sun Microsystems’s DTrace to Linux. The dtrace tool interprets. Linux kernel for further execution and collecting the outputted data. Linux kernel in which a virtual machine can execute. You can attach. such programs to tracepoints and KProbes thanks to a system call, and. VM register values, and e. BPF maps, to name. Linux kernel. Its user. Linux which supports hardware. System. Tap, uses scripts to. Linux kernel events. You write scripts, or chisels in. Lua and sysdig executes them while the system is. System. Tap is a Linux kernel and. System. Tap converts the scripts to the C language, and then. Linux kernel modules which are loaded to produce. System. Tap’s primary user interface is the stap. The main distinctive features of LTTng is that it produces correlated. It produces trace files in the. CTF format, a file format optimized. LTTng is the result of more than 1. LTTng 2. 9 is currently available on major desktop and server. Linux distributions. The main interface for tracing control is a single command- line tool. The latter can create several tracing sessions, enable. LTTng can. record the traces on the file system or send them over the network, and. You can view the traces once tracing. Install LTTng now and. LTTng is a set of software components which interact to. Linux kernel and user applications, and. Those. components are bundled into the following packages: LTTng- tools: Libraries and command- line interface to. LTTng- modules: Linux kernel modules to instrument and. LTTng- UST: Libraries and Java/Python packages to instrument and. Most distributions mark the LTTng- modules and LTTng- UST packages as. LTTng- tools (which is always required). In the. following sections, we always provide the steps to install all three. You only need to install LTTng- modules if you intend to trace the. Linux kernel. You only need to install LTTng- UST if you intend to trace user. Availability of LTTng 2. Linux distributions as of 2. July 2. 01. 7. LTTng 2. Ubuntu 1. 7. 0. 4 Zesty Zapus. For previous releases of Ubuntu, use the LTTng Stable 2. PPA. To install LTTng 2. Ubuntu 1. 7. 0. 4 Zesty Zapus. Install the main LTTng 2. If you need to instrument and trace. Java applications, install the LTTng- UST. If you need to instrument and trace. Python 3 applications, install the. LTTng- UST Python agent. The LTTng. Stable 2. PPA offers the latest stable. LTTng 2. 9 packages for. Ubuntu 1. 4. 0. 4 Trusty Tahr. Ubuntu 1. 6. 0. 4 Xenial Xerus. To install LTTng 2. LTTng Stable 2. 9 PPA. Add the LTTng Stable 2. PPA repository and update the. VMware Workstation - Wikipedia. VMware Workstation is a hosted hypervisor that runs on x. Windows and Linux operating systems[4] (an x. VMs) on a single physical machine, and use them simultaneously along with the actual machine. Each virtual machine can execute its own operating system, including versions of Microsoft Windows, Linux, BSD, and MS- DOS. VMware Workstation is developed and sold by VMware, Inc., a division of Dell Technologies. There is a free- of- charge version, VMware Workstation Player, for non- commercial use. An operating systems license is needed to use proprietary ones such as Windows. Ready- made Linux VMs set up for different purposes are available from several sources. VMware Workstation supports bridging existing host network adapters and sharing physical disk drives and USB devices with a virtual machine. It can simulate disk drives; an ISO image file can be mounted as a virtual optical disc drive, and virtual hard disk drives are implemented as . VMware Workstation Pro can save the state of a virtual machine (a "snapshot") at any instant. These snapshots can later be restored, effectively returning the virtual machine to the saved state,[5] as it was and free from any post- snapshot damage to the VM. VMware Workstation includes the ability to group multiple virtual machines in an inventory folder. The machines in such a folder can then be powered on and powered off as a single object, useful for testing complex client- server environments. VMware Workstation versions 1. In January 2. 01. VMware Workstation and Fusion was disbanded and all US developers were immediately fired.[7][8][9][1. The company said that "the restructuring activities will not impact the existence of any current product lines", that "roles and responsibilities associated with particular businesses will be moved to other regions and office locations", and that investment would continue "with emphasis on our growth products". The future of Workstation and Fusion became uncertain. On 2. 4 April 2. 01. In September, same year, the company announced that "we’re very much alive and well". Consequently on September 1. Workstation 1. 2. Fusion 8. 5 were released as free upgrades which added support for Windows 1. Anniversary edition and Windows Server 2. Critical reception[edit]VMware Workstation 1. Infoworld. The review mainly concerns differences with earlier versions, concluding that this version has moderate improvements, mainly to support newer hardware and operating systems, that may not be worth the cost of upgrading. The review concludes that Workstation 1. ZDNet examined the suitability of Workstation 1. Windows 1. 0, finding it suitable for the purpose.[1. Version history[edit]Legend. Color. Meaning. Red. Unsupported release. Green. Current or still supported release. Blue. Future release. Version. Release date. Significant changes. First release. 3. November 2. 00. 13. April 2. 00. 24. 0. March 2. 00. 34. 5. April 2. 00. 45. 0. April 2. 00. 55. 5. September 2. 00. 56. May 2. 00. 76. 5. September 2. 00. 86. CPUs without PAE[1. Record Replay[1. 4]7. October 2. 00. 9Replay Debugging (improved Record Replay)[1. September 2. 01. 1Shared Virtual Machines. Workstation 8 is the first version that requires an x. CPU. Replay Debugging removed[1. August 2. 01. 21. September 2. 01. 31. October 2. 01. 3Improved compatibility with some AMD Piledriver CPUs. Easy Install support for Windows 8. RTM and Windows Server 2. R2 RTMFixes for certain hangs and freezes. April 2. 01. 4The compatibility and performance of USB audio and video devices with virtual machines has been improved. Resolved an issue that prevents a USB device from being connected to Linux RHEL 5 guest operating system. Easy installation option supports Windows 8. Update 1 and Windows Server 2. R2 as a guest operating system. Open. SUSE 1. 3. 1 is now supported as a host operating system. Resolved an issue causing burning CDs with Blu- ray drives to fail while connected to the virtual machine. Resolved an issue that caused using Microsoft Word and Excel in unity mode causes a beep. Resolved an issue causing host application windows to be blanked out in the UAC dialog on the Linux host of the Windows 8 virtual machine. Resolved an issue that prevented the Sound Card from being automatically added to the VM when powering on the virtual machine on a Linux host. Resolved an issue that could cause a Windows 8. Metro style applications in the launch menu. Resolved a hotkey conflict in the Preference dialog of the KVM mode. Resolved a compatibility issue of GL renderer with some new Nvidia drivers. Resolved graphics errors with for Solidworks applications. Resolved an issue causing virtual machines imported from a physical PC to crash on startup. Resolved an issue about shared folder when the user read and write file using two threads. Resolved an issue that caused Linux virtual machines to see stale file contents when using shared folders. Resolved the virtual machine performance issues when using the E1. Resolved an issue preventing Workstation from starting on Ubuntu 1. July 2. 01. 4VMware Workstation 1. OPENSSL library version openssl- 0. CVE- 2. 01. 4- 0. CVE- 2. 01. 4- 0. CVE- 2. 01. 0- 5. CVE- 2. 01. 4- 3. October 2. 01. 4Fixes memory issue in Workstation on Microsoft Windows 8. Windows Server 2. January 2. 01. 5Bug fixes. At power- on, a virtual machine hangs and a . The Video. Re. Do application does not display the video properly and parts of the application's screen are scrambled. Copying and pasting a large file from host to guest may fail. Memory leak in the HGFS server (for shared folders) causes VMware Tools to crash randomly with the error: Exception 0xc. New VMs have the same location UUID and MAC address so that the UUID and MAC address are not unique. This problem occurs with WS 9 and WS 1. VMs but not WS 7 and WS 8 VMs. On RHEL 6. 6, vmmon cannot be loaded due to incompatible kernel symbol versions. With gcc, kernel- headers, kernel- devel installed, vmmon module will be recompiled automatically. Memory leak by the process vmtoolsd. NIC is disabled causes memory consumption by Workstation processes to increase over time. When USB devices are autoconnected with a hub to a Renesas host controller, the devices are not redirected to the guest. WS 1. 1 license is accepted by WS 1. When WS is installed on Linux in a non- default location, the Virtual Network Editor fails to run. May 2. 01. 5Fixed a problem when uploading a virtual machine with Workstation 1. ESXi 6. 0. Updated to Open. SSL library version openssl- 1. Jul 2. 01. 51. 1. Dec 2. 01. 41. 1. Feb 2. 01. 5Added support for VMware v. Cloud Air Virtual Private Cloud On. Demand. Bug Fixes. A Linux guest OS booted on EFI firmware sometimes failed to respond to the keyboard and mouse if any mouse motion occurred during a short window of time during OS boot. Outlook 2. 01. 0 would occasionally crash when running in Unity mode. You could not compact or defragment a persistent disk. The UI sometimes crashed when a user copied and pasted a file between two Windows guests. Rendering corruption in UI elements in Fedora 2. D enabled. When creating a new virtual machine with SUSE Linux Enterprise (SLE) 1. Easy Install path was not available. Jun 2. 01. 5Critical security fix for CVE- 2. CVE- 2. 01. 5- 2. CVE- 2. 01. 5- 2. CVE- 2. 01. 5- 2. CVE- 2. 01. 5- 2. VMware Workstation and Horizon Client TPView. TPInt. dll incorrectly handle memory allocation. On Workstation, this may allow a guest to execute code or perform a Denial of Service on the Windows OS that runs Workstation. Jun 2. 01. 5Security Issues. VMware Workstation 1. Open. SSL library version openssl- 1. Bug Fixes. Two interface items on the Access Control screen used the same hot- key combination. Attempting to suspend a Windows virtual machine with the Sensor Diagnostic Tool running caused the virtual machine to become unresponsive. Using audio conferencing software on a Windows 8 guest operating system caused a severe echo during both video and audio calls. On the Windows 9. Symbolic links created within a Windows guest operating system on a Linux host did not list files under subdirectories. Workstation did not display Regions in the VMware v. Cloud Air Subscription node. Workstation could not automatically detect the Fedora 2. ISO when creating a new Fedora 2. Under specific conditions, when the alipaybsm. Workstation host, network service was disrupted. After connecting to v. Cloud Air from Workstation, no virtual machines were listed in the Workstation virtual machine library.
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