Analyzer erl-on-cpu

# Name

erl-on-cpu - Erlang-Land on-CPU Flame Graph

This analyzer profiles on-CPU time consumption in Erlang-land code execution within Erlang/OTP applications. It captures stack traces from Erlang processes and functions during active CPU execution. The analyzer generates flame graphs that visualize CPU time distribution across Erlang function calls, helping identify performance bottlenecks and hot code paths in Erlang applications.

# Resource Category

CPU.

# Application Type & Technical Stack

• Erlang

# Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run erl-on-cpu -p PID

# trace a shell command directly
orxray analyzer run erl-on-cpu -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run erl-on-cpu -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run erl-on-cpu --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs

# Author

The OpenResty Inc. Team.

# Copyright

Copyright (C) by OpenResty Inc. All rights reserved.