flamegraph
TLDR
Generate flame graph from perf data
SYNOPSIS
flamegraph.pl [options] [input]
DESCRIPTION
FlameGraph is a visualization tool for profiled stack traces, created by Brendan Gregg. It generates interactive SVG graphs where the x-axis shows the stack population and the y-axis shows stack depth.
Flame graphs quickly reveal which code paths consume the most resources. They work with any profiler output that can be converted to the collapsed stack format.
PARAMETERS
--title text
Title for the graph.--width pixels
SVG width (default 1200).--height pixels
Frame height (default 16).--minwidth pixels
Minimum width to show.--inverted
Generate icicle graph (top-down).--reverse
Reverse stack order.--colors palette
Color palette: hot, mem, io, java.--hash
Color by function name hash.--flamechart
Time-ordered flame chart.
WORKFLOW
perf record -g ./myapp
# 2. Convert to text stacks
perf script > out.perf
# 3. Collapse stacks
stackcollapse-perf.pl out.perf > stacks.txt
# 4. Generate flame graph
flamegraph.pl stacks.txt > flame.svg
CAVEATS
Requires Perl. Input must be in collapsed stack format. Large profiles may produce complex graphs. Colors are random unless --hash used. Interactive features require SVG-capable browser.
HISTORY
Flame graphs were invented by Brendan Gregg in 2011 while at Joyent for analyzing performance issues. The visualization technique has become standard for performance profiling across languages and platforms.
