Flame graphs are a visualization of hierarchical data, created to visualize stack traces of profiled software so that the most frequent code-paths to be identified quickly and accurately. It basically visualizes a collection of stack traces (aka call stacks), shown as an adjacency diagram with an inverted icicle layout. Flame graphs are commonly used to visualize CPU profiler output, where stack traces are collected using sampling.

FlameGraph - Stack trace visualizer

Alleyoop is a graphical front-end to the increasingly popular Valgrind memory checker for the x86 and x86_64 flavors of Linux using the Gtk+ widget set and other GNOME libraries for the X-Windows environment. <BR><BR> Features include a right-click context menu to intelligently suppress errors or launch an editor on the source file/jumping to the exact line of the error condition. A searchbar at the top of the viewer can be used to limit the viewable errors to those that match the regex criteria entered. Also included is a fully functional Suppressions editor

Alleyoop is a graphical front-end to the increasingly popular Valgrind memory checker for the x86 and x86_64 flavors of Linux using the Gtk+ widget set and other GNOME libraries for the X-Windows environment.

Alleyoop

OProfile consists of a kernel driver and a daemon for collecting sample data, and several post-profiling tools for turning data into information. OProfile works across a range of CPUs, include the Intel range, AMD's Athlon and AMD64 processors range, the Alpha, ARM, and more. OProfile will work against almost any 2.2, 2.4 and 2.6 kernels, and works on both UP and SMP systems from desktops to the scariest NUMAQ boxes. <BR><BR> Its feature includes System-wide profiling, Performance counter support, Call-graph support, Post-profile analysis. 

OProfile is a system-wide profiler for Linux systems, capable of profiling all running code at low overhead. It leverages the hardware performance counters of the CPU to enable profiling of a wide variety of interesting statistics, which can also be used for basic time-spent profiling. All code is profiled: hardware and software interrupt handlers, kernel modules, the kernel, shared libraries, and applications.

OProfile

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FlameGraph - Stack trace visualizer

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