On Wed, Jun 17, 2020 at 7:35 PM Alex Bennée <alex.ben...@linaro.org> wrote: > > Right - which I do as a developer. It would be rude to sudo things if > you don't need to because then you end up running your potentially > un-trusted application with root privileges. > > Could we either probe for the requirement or require an explicit sudo > flag which we can prompt for if it fails? > To make sure I got it right. You mean I should specify in the script comment on the top that the user should modify the kernel.perf_event_paranoid setting in order to run the script, otherwise, they should add a --sudo flag when running the Python script to invoke perf as sudo?
> > > >> Also redirecting just stderr? why? > > > > Perf, as well as Valgrind, print their output on stderr not stdout. > > Right so I think a bit of splitting apart and use of subprocess can make > this cleaner and not involve quite so much being done with shell > redirection in one invocation. > Noted!
