Analyzer c-on-cpu

# Name

c-on-cpu - C-Land CPU Flame Graph

This analyzer profiles CPU usage in C-land code execution across various native C/C++ applications including Envoy, NGINX, and other programs. It captures stack traces from native C functions during active CPU execution. The analyzer generates flame graphs that visualize CPU time distribution across C-level function calls, helping identify performance bottlenecks in native code execution.

# Resource Category

CPU.

# Application Type & Technical Stack

• All
• C/C++
• Envoy

# 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 c-on-cpu -p PID

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

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

# trace any processes started from the specified executable path.
orxray analyzer run c-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.