Analyzer go-off-cpu

# Name

go-off-cpu - Go-Land off-CPU Flame Graph

This analyzer profiles blocking and waiting time in Go applications by capturing stack traces when goroutines are off-CPU. It generates flame graphs showing where goroutines spend time waiting for I/O, locks, channels, or other blocking operations. The analyzer is essential for diagnosing latency issues, identifying synchronization bottlenecks, and optimizing concurrent Go application performance.

# Resource Category

off-CPU.

# Application Type & Technical Stack

• Go

# 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 go-off-cpu -p PID

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

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

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