On 21/06/2016 05:11, Brendan Gregg wrote: >>> > > - Add stackcollapse.py script to help generating flame graphs (Paolo >>> > > Bonzini) >> > >> > I think this is already done by '-g folded'. Please see: >> > >> > http://www.brendangregg.com/blog/2016-04-30/linux-perf-folded.html >> > > Pretty much. Two similar solutions were developed around the same > time. Although I have to use some awk to get "perf -g folded" in the > exact right format, and stackcollapse-perf.py does that directly.
Yes, the idea for stackcollapse-perf.py was: - to do everything directly and emit "the right" format for the flamegraph tools. This however is a very minimal output, and it's not necessarily the best for perf in general. - to provide an example of visiting callgraphs from the scripting interface, since it's not really documented. From the commit message: "Add stackcollapse.py script as an example of parsing call chains, and also of using optparse to access command line options". Paolo
