Brendan Gregg

Stack trace visualizer

FlameGraph turns raw CPU profiler output into an interactive SVG chart where the widest boxes show which functions consume the most time, making it fast to spot performance bottlenecks in any program.

Performance analysis tools based on Linux perf_events (aka perf) and ftrace

A collection of Linux shell scripts by Brendan Gregg for observing system performance in real time, tracking disk I/O, file opens, process starts, and more using built-in kernel tracing.

Official repository for the BPF Performance Tools book

Heat map generation tools

PMC (Performance Monitoring Counter) tools for the cloud

An any-snarf program that processes application protocols (HTTP/FTP/...) from tcpdump or snoop files and stores session and file data

Working Set Size tools

Some DTrace tools written for the SmartOS/SmartDataCenter cloud (illumos-based)

No description.

MSR Cloud Tools

SystemTap Lightweight Tools

Scripts from "DTrace: Dynamic Tracing in Oracle Solaris, Mac OS X, and FreeBSD", by Brendan Gregg and Jim Mauro, Prentice Hall, 2011.

Performance Tools using Linux eBPF

Performance analysis labs

DTrace tools for FreeBSD

Performance Scalability Models

BPF Compiler Collection

Misc

Visualize file data as a PNG

Guessing game written in many programming languages

Linux /proc/PID/stack profiler

BPF noisy typewriter (bpftrace)

DTrace-style dynamic tracing tool for Linux

Perturbation Benchmark

Catalog of valuable metrics you might want to collect

a system exploration and troubleshooting tool

coming soon

A collection of useful, tested and documented DTrace scripts

Presentations and docs

A d3.js library to produce flame graphs.

WRMSR micro benchmark

Dynamic Tracing in Linux

Project for testing web-service implementations.

Processor PMC sample skid testing

Vector is an on-host performance monitoring framework which exposes hand picked high resolution metrics to every engineer’s browser.

A command-line hex viewer

No description.

testing github

No description.

A java agent to generate method mappings to use with the linux `perf` tool

Node.js C++ lldb plugin

scripts using eBPF