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Analyzer lj-trace-abort-events-fgraph

Name

lj-trace-abort-events-fgraph - Lua Land Trace Abort Events Flame Graph

This analyzer profiles the execution paths leading to LuaJIT trace abort events in applications such as OpenResty and Kong. It captures stack traces at the moment when trace compilation is aborted due to various reasons such as NYI (Not Yet Implemented) bytecodes, side exits, or other limitations. The analyzer generates flame graph visualizations showing the Lua-level call stacks associated with trace aborts, helping developers identify code patterns that prevent successful trace compilation and optimize hot paths for better JIT performance.

Resource Category

CPU.

Application Type & Technical Stack

  • OpenResty
  • Kong
  • APISIX

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 lj-trace-abort-events-fgraph -p PID

# trace a shell command directly
orxray analyzer run lj-trace-abort-events-fgraph -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run lj-trace-abort-events-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run lj-trace-abort-events-fgraph --exe /path/to/exe/file

Tracing Multiple Processes

Supported.

Output Formats

  • Flame Graphs

Author

The OpenResty Inc. Team.

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