Em Tue, Mar 20, 2018 at 12:57:29PM +0100, Jan-Oliver Kaiser escreveu: > After upgrading my system to linux 4.15 (from 4.14), `perf report` became > unusably slow. I estimate a decrease in performance by a factor of > 100x-1000x. Some 21M perf.data files take about 30 seconds in the > "Processing events" step. `git bisect` points to > commit d8a88dd243a170a226aba33e7c53704db2f82aa6 (HEAD, refs/bisect/bad) > Author: Milian Wolff <[email protected]> > perf util: Enable handling of inlined frames by default > The slowdown can be worked around with `--no-inline`. If the slowdown is > expected, I would suggest reverting the default setting here or maybe > printing a warning if a lot of time is spent on this feature. > Do you need any additional information about my system or the recorded data > I am looking at?
Can you try with the latest perf tool? [acme@jouet perf]$ make perf-tarxz-src-pkg ; ls -la perf-4* TAR PERF_VERSION = 4.16.rc6.gecd380 -rw-rw-r--. 1 acme acme 1323568 Mar 20 10:30 perf-4.16.0-rc6.tar.xz [acme@jouet perf]$ With a recently checked out kernel sources, or, as a convenience, I'm pushing this to: http://vger.kernel.org/~acme/perf/perf-4.16.0-rc6.tar.xz You just expand it and then: [acme@jouet tmp]$ tar xf perf-4.16.0-rc6.tar.xz [acme@jouet tmp]$ cd perf-4.16.0-rc6/ [acme@jouet perf-4.16.0-rc6]$ make -C tools/perf install-bin And check if the problem is present there as well. If it is, please tell us what is your distro, the output of: perf report --header-only Thanks, - Arnaldo
