| # fx extract-pprof |
| |
| Extract pprof data from inspect.json |
| |
| ```none |
| Fuchsia diagnostics provides a component inspection mechanism ("inspect") |
| (see ## https://fuchsia.dev/fuchsia-src/development/diagnostics/inspect); |
| Fuchsia snapshots (see https://fuchsia.dev/reference/tools/fx/cmd/snapshot) |
| include data collected from inspect in a file typically named inspect.json. |
| |
| pprof is a tool for visualization and analysis of profiling data (see |
| https://github.com/google/pprof). Certain Fuchsia components expose profiling |
| data to inspect; this data ends up in snapshots which can be useful for |
| debugging crashes, memory leaks, concurrency bugs, etc. |
| |
| This tool extracts and decodes the profiling data for the given component |
| moniker from inspect.json so that it can be used with the pprof tool. |
| |
| usage: fx extract-pprof --inspect FILE --component MONIKER |
| |
| --inspect Path to the inspect.json file |
| --component Moniker to extract pprof data for (e.g. core/network/netstack) |
| |
| optional arguments: |
| --output Directory to extract pprof data to; If not specified, a temporary |
| directory will be created |
| ``` |
| |
| [extract-pprof source code](https://cs.opensource.google/fuchsia/fuchsia/+/main:tools/devshell/contrib/extract-pprof.fx) |
