Arnaldo Carvalho de Melo <a...@kernel.org> writes: > Em Wed, Feb 15, 2017 at 10:34:58AM +0200, Alexander Shishkin escreveu: >> Arnaldo Carvalho de Melo <a...@kernel.org> writes: >> > Em Tue, Feb 14, 2017 at 03:24:16PM +0200, Alexander Shishkin escreveu: >> > Yeah, I saw that as well, and Andi told me about this limitation, so, >> > for quite a while now, everytime I need to test PT on the only machine I >> > have with it, I have to stop my kvm sessions :-\ > >> > Thanks for working on this! > >> Well, we can't make the limitation go away. You'll still have to stop >> kvms to get any 'meaningful' PT data. > > If we can't make the limitation go away we need to at least warn users > instead of let 'perf record' sit there doing nothing and then at the end > return as if everything went well only to when trying to use 'perf > script' nothing will appear.
I tend to like Peter's idea about PERF_RECORD_AUX with a PAUSED flag to indicate this. Regards, -- Alex
