https://bugs.kde.org/show_bug.cgi?id=422306
--- Comment #36 from Fredric <fredr...@duck.com> --- (In reply to David Faure from comment #34) > Keep in mind that if most of the time is spent waiting (for I/O, network, > mutex....) then using hotspot to look at CPU cycles will tell you nothing. Yes. KSysGuard doesn't show any CPU spike during Dolphin startup and delays. > You want to check the "off-CPU profiling" checkbox in hotspot, and look at > wait times (in the flamegraph, look at the combobox which says "cycles", > change it to "off-CPU Time"). > If you get errors about sched_wait or something, run this script: > http://www.davidfaure.fr/kde/perf-init I have run the script. If I check the "off-CPU profiling" checkbox, > privileges elevated! > $ perf record -o /home/fr/perf.data --call-graph dwarf,8192 --event cycles > --switch-events --event sched:sched_switch --aio -z --sample-cpu > /usr/bin/dolphin > restoring privileges... Dolphin window doesn't show up, and I can't stop recording. When I click the "Stop Recording (...min ...s)" it changes to "Stop Recording" but the Hotspot app becomes unresponsive and I can't shutdown normally due to the perf process. -- You are receiving this mail because: You are watching all bug changes.
