Add stackcollapse.py script as an example of parsing call chains, and also of using optparse to access command line options. The flame graph tools include a set of scripts that parse output from various tools (including "perf script"), remove the offsets in the function and collapse each stack to a single line. The website also says "perf report could have a report style [...] that output folded stacks directly, obviating the need for stackcollapse-perf.pl", so here it is. This script is a Python rewrite of stackcollapse-perf.pl, using the perf scripting interface to access the perf data directly from Python.
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| 1 | +#!/bin/sh | |
| 2 | + | |
| 3 | +# | |
| 4 | +# stackcollapse.py can cover all type of perf samples including | |
| 5 | +# the tracepoints, so no special record requirements, just record what | |
| 6 | +# you want to analyze. | |
| 7 | +# | |
| 8 | +perf record "$@" | |
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| 1 | +#!/bin/sh | |
| 2 | +# description: produce callgraphs in short form for scripting use | |
| 3 | +perf script -s "$PERF_EXEC_PATH"/scripts/python/stackcollapse.py -- "$@" | |