Fei Zheng
30 lines
917 B
Markdown
30 lines
917 B
Markdown
# Generating a Critical Trace
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```eval_rst
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.. toctree::
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:glob:
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:maxdepth: 4
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```
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## Overview
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A critical trace is defined in omnitrace as the most time-consuming path through a parallelized code.
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The steps for generating a critical trace are:
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1. Enable the `OMNITRACE_CRITICAL_TRACE` setting
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2. Configure any other relevant critical-trace settings, as needed
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- `omnitrace-avail --categories settings::critical_trace`
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3. Execute application
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4. Locate the JSON files with `call-chain` in their name
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5. Provide these files to the `omnitrace-critical-trace` executable
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6. Open generated perfetto file in [ui.perfetto.dev](https://ui.perfetto.dev/)
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## omnitrace-critical-trace Executable
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The `omnitrace-critical-trace` executable post-processes one or more `call-chain` JSON files and generates a perfetto output
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for visualizing the critical trace.
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**INCOMPLETE**
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This executable is still under-development.
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