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strace is a system call tracer, i.e. a debugging tool which prints out a trace of all the system calls made by a another process/program.
DTrace is a comprehensive dynamic tracing framework for the Solaris™ Operating Environment. DTrace provides a powerful infrastructure to permit administrators, developers, and service personnel to concisely answer arbitrary questions about the behavior of the operating system and user programs.
SystemTap provides free software (GPL) infrastructure to simplify the gathering of information about the running Linux system. This assists diagnosis of a performance or functional problem. SystemTap eliminates the need for the developer to go through the tedious and disruptive instrument
ltrace is a program that simply runs the specified command until it exits. It intercepts and records the dynamic library calls which are called by the executed process and the signals which are received by that process. It can also intercept and print the
Devel::TraceDeps delivers a comprehensive report of everything which was loaded into your perl process via the use, require, or do($file) mechanisms. It is designed to run alongside your test suite. The data may be collected into a tree to allow for further analysis.
libqb is a thread-safe library with the primary purpose of providing high performance client server reusable features. It provides high performance logging, tracing, ipc, and poll. We don't intend be an all encompassing library, but instead provide very specially focused APIs that are highly
trace-cmd provides a convenient interface to the ftrace tracing mechanism in the Linux kernel. It can run a command with various tracing options enabled, and then generate a report of the tracing results.
picogen is an outdoor ray tracing system, targetting large-scale terrain with realistic day/night-illumination.
iogrind is a prototype I/O profiling tool, under development. It aims to give a fairly accurate picture of all the I/O your application would perform on a cold start: this can help to accelerate your application's cold start performance. It also has a nice file-system view.
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