This is a list of performance analysis tools for use in software development.

This repo contains the 'Hardware' files to support STM32 based boards on Arduino version 1.8.x (some older versions may also work) including LeafLabs Maple, and Maple mini, and other generic STM32F103 boards. General purpose, language independent. The following tools work based on log files that can be generated from various systems. Time (Unix) - can be used to determine the run time of a program, separately counting user time vs. System time, and CPU time vs. Limitless scalability to deploy smartphone-like UIs on ultra-low-cost hardware and advanced graphics on supercomputers. Qt 6.0 is the foundation we will build on to deliver the productivity platform for the future.

General purpose, language independent[edit]

The following tools work based on log files that can be generated from various systems.

• time (Unix) - can be used to determine the run time of a program, separately counting user time vs. system time, and CPU time vs. clock time.^[1]
• timem (Unix) - can be used to determine the wall-clock time, CPU time, and CPU utilization similar to time (Unix) but supports numerous extensions.
  • Supports reporting peak resident set size, major and minor page faults, priority and voluntary context switches via getrusage.
  • Supports sampling procfs on supporting systems to report metrics such as page-based resident set size, virtual memory size, read-bytes, and write-bytes, etc.
  • Supports collecting hardware counters when built with PAPI support.

Multiple languages[edit]

The following tools work for multiple languages or binaries.

C and C++[edit]

• Arm MAP, a performance profiler supporting Linux platforms.
• AppDynamics, an application performance management solution^[buzzword] for C/C++ applications via SDK.
• AQtime Pro, a performance profiler and memory allocation debugger that can be integrated into Microsoft Visual Studio, and Embarcadero RAD Studio, or can run as a stand-alone application.
• IBM Rational Purify was a memory debugger allowing performance analysis.
• Instruments (bundled with Xcode) is used to profile an executable's memory allocations, time usage, filesystem activity, GPU activity etc.
• Intel Parallel Studio contains Intel VTune Amplifier, which tunes both serial and parallel programs. It also includes Intel Advisor and Intel Inspector. Intel Advisor optimizes vectorization (use of SIMD instructions) and prototypes threading implementations. Intel Inspector detects and debugs races, deadlocks and memory errors.
• ParasoftInsure++ provides a graphical tool that displays and animates memory allocations in real time to expose memory blowout, fragmentation, overuse, bottlenecks and leaks.
• Timemory, a modular C++ toolkit for creating performance analysis tools which provides numerous command-line tools and libraries as a by-product of its flexibility and reusability.
• Visual Studio Team System Profiler, commercial profiler by Microsoft.

Java[edit]

• inspectIT is an open-source application performance management (APM) solution^[buzzword] for monitoring and analyzing software applications, available under the Apache License, Version 2.0 (ALv2).
• JConsole is the profiler which comes with the Java Development Kit
• JRockit Mission Control, a profiler with low overhead.
• Netbeans Profiler, a profiler integrated into the NetBeans IDE (internally uses jvisualvm profiler)
• Plumbr, Java application performance monitoring with automated root cause detection. Links memory leaks, GC inefficiency, slow database and external web service calls, locked threads, and other performance problems to the line in source code that causes them.
• OverOps, Continuous reliability for the modern software supply chain, automatically detect and deliver root cause automation for all errors.
• VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling capabilities. It is bundled with the Java Development Kit since version 6, update 7.
• FusionReactor, Java application performance monitoring - low overhead, production grade tools for production debugging, code profiling, memory and thread analysis

JavaScript[edit]

• Firebug is a Firefox plug-in for web development, also has a profiler for JavaScript.
• Microsoft Visual Studio AJAX Profiling Extensions is a free profiling tool for JavaScript by Microsoft Research.

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.NET[edit]

• CLR Profiler is a free memory profiler provided by Microsoft for CLR applications.
• GlowCode is a performance and memory profiler for .NET applications using C# and other .NET languages. It identifies time-intensive functions and detects memory leaks and errors in native, managed and mixed Windows x64 and x86 applications.

PHP[edit]

• Xdebug is a PHP extension which provides debugging and profiling capabilities.

See also[edit]

• Memory debugger (includes list of memory profilers)

References[edit]

1. ^'CodeXL'. Archived from the original on 19 September 2013. Retrieved 26 September 2013.

External links[edit]

• Performance Analysis Tools, article from the Lawrence Livermore National Laboratory

This guide covers how to install the Lotus applications and launch a Lotus Node.. This guide covers installing lotus, lotus-miner and lotus-worker to your computer, and then runs through setting up a Lotus node. For information on running the miner, check the Lotus Miner documentation.

# Minimal requirements

To run a Lotus node, your computer must have:

• macOS or Linux installed. Windows is not yet supported.
• 8-core CPU and 32 GiB RAM. Models with support for Intel SHA Extensions (AMD since Zen microarchitecture, or Intel since Ice Lake) will significantly speed things up.
• Enough space to store the current Lotus chain (preferably on an SSD storage medium). The chain grows at approximately 12 GiB per week. The chain can be also synced from trusted state snapshots and compacted.

WARNING

These are the minimal requirements to run a Lotus node. Hardware requirements for Miners are different.

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# Linux

The following instructions are specific to Linux installations. Head to the macOS section if you want to install Lotus on a Mac.

# Software dependencies

You will need the following software installed to install and run Lotus.

# System-specific

Building Lotus requires some system dependencies, usually provided by your distribution.

Arch:

Ubuntu/Debian:

Fedora:

OpenSUSE:

Amazon Linux 2:

# Rustup

Lotus needs rustup(opens new window). The easiest way to install it is:

TIP

Make sure your $PATH variable is correctly configured after the rustup installation so that cargo and rustc are found in their rustup-configured locations.

# Go

To build Lotus, you need a working installation of Go 1.15.5 or higher(opens new window):

Make sure that /usr/local/go/bin is in your PATH. If you are running into problems, check the official Go installation instructions(opens new window) for your operating system.

# Build and install Lotus

Once all the dependencies are installed, you can build and install the Lotus suite (lotus, lotus-miner, and lotus-worker).

1. Clone the repository:

2. To join mainnet, checkout the master branch and latest release(opens new window).

   If you are changing networks from a previous Lotus installation or there has been a network reset, read the Switch networks guide before proceeding.

   For networks other than mainnet, look up the current branch or tag and commit for the network you want to join in the Filecoin networks dashboard(opens new window), then build Lotus for your specific network below.

   Currently, the master branch corresponds to mainnet.

3. If you are in China, check out the specific tips.

4. Depending on your CPU model, you will want to export additional environment variables:

   If you have an AMD Zen or Intel Ice Lake CPU (or later), enable the use of SHA extensions by adding these two environment variables:

   See the Native Filecoin FFI section for more details about this process.

   Some older Intel and AMD processors without the ADX instruction support may panic with illegal instruction errors. To fix this, add the CGO_CFLAGS environment variable:

   This is due to a Lotus bug that prevents Lotus from running on processor without adx instruction support, and should be fixed soon.

5. Build and install Lotus:

   This will put lotus, lotus-miner and lotus-worker in /usr/local/bin.

   lotus will use the $HOME/.lotus folder by default for storage (configuration, chain data, wallets, etc). See advanced options for information on how to customize the Lotus folder.

6. You should now have Lotus installed. You can now start the Lotus daemon.

# Native Filecoin FFI

Some newer CPU architectures like AMD's Zen and Intel's Ice Lake, have support for SHA extensions. Having these extensions enabled significantly speeds up your Lotus node. To make full use of your processor's capabilities, make sure you set the following variables before building from source:

This method of building does not produce portable binaries. Make sure you run the binary on the same computer as you built it.

# Systemd service files

Lotus provides generic Systemd service files. They can be installed with:

WARNING

Provided service files should be inspected and edited according to user needs as they are very generic and may lack specific environment variabes and settings needed by the users.

One example is that logs are redirected to files in /var/log/lotus by default and not visible in journalctl.

# macOS

These instructions are specific to macOS. If you are installing Lotus on a Linux distribution, head over to the Linux section.

# XCode Command Line Tools

Lotus requires that X-Code CLI tools be installed before building the Lotus binaries.

1. Check if you already have the XCode Command Line Tools installed via the CLI, run:

   If this command returns a path, you can move on to the next step. Otherwise, to install via the CLI, run:

2. To update, run:

# Install Homebrew

We recommend that MacOS users use Homebrew(opens new window) to install each of the necessary packages.

1. Use the command brew install to install the following packages:

2. Clone the repository:

3. To join mainnet, checkout the master branch and browse for the latest release(opens new window).

   If you are changing networks from a previous Lotus installation or there has been a network reset, read the Switch networks guide before proceeding.

   To join networks other than mainnet, look up the correct branch or tag and commit for the network you want to join in the Filecoin networks dashboard(opens new window), then build Lotus for your specific network below.

   Currently, the master branch corresponds to mainnet.

4. If you are in China, check out the specific tips.

5. Some older Intel and AMD processors without the ADX instruction support may panic with illegal instruction errors. To fix this, add the CGO_CFLAGS environment variable:

   This is due to a Lotus bug that prevents Lotus from running on processor without adx instruction support, and should be fixed soon.

6. Build Lotus:

7. You should now have Lotus installed. You can now start the Lotus daemon.

# Start the Lotus daemon and sync the chain

The lotus application runs as a daemon and a client to control and interact with that daemon. A daemon is a long-running program that is usually run in the background.

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When using mainnet, we recommend to start the daemon syncing from a trusted state snapshot. In any case, you can start the deamon with the following command:

During the first run, Lotus will:

• Setup its data folder at ~/.lotus.
• Download the necessary proof parameters. This is a few gigabytes of data that is downloaded once.
• Import the snapshot (if specified) and start syncing the Lotus chain.

The daemon will start producing lots of log messages right away. From this point, you will have to work on a new terminal and lotus commands will communicate with the running daemon.

TIP

Do not be concerned by the number of warnings and sometimes errors showing in the logs. They are a normal part of the daemon lifecycle as it participates in the global distributed consensus network.

If you used snapshots, subsequent daemon starts can proceed as normal without any options:

For more information about syncing and snapshots, see the Chain management section.

We recommend waiting until the syncing process has completed, which should be relatively fast when using trusted state snapshot imports:

# Interact with the daemon

The lotus command allows you to interact with a running Lotus daemon. The lotus-miner and lotus-worker commands work in the same way.

Lotus comes with built-in CLI documentation:

For example, after your Lotus daemon has been running for a few minutes, use lotus to check the number of other peers that it is connected to in the Filecoin network:

# Stop the Lotus daemon

In order to gracefully stop the running lotus daemon (required when restarting the daemon to update Lotus), use the following command: