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 "$@" | ||