Em Mon, Feb 29, 2016 at 06:35:28PM +0100, Andi Kleen escreveu: > > What kernel have you used for testing this? 4.5-rc? I'm having trouble > > with intel_pt with 4.5.0-rc4 :-\ > > Works for me (on -rc5). What problem do you see?
Doesn't work for me on (4.5.0-rc4), but after your report of it working my -rc4 .config and built -rc6+ with it, now it seems to work as expected, will test your patch with it later. > > And while this looks like a great feature to have, have you considered > > using what is in tools/perf/util/intel-pt-decoder/ somehow, so that we > > don't end up adding one more dependency on another external library? > > This needs a text disassembler. > > The PT decoder doesn't have a disassembler unfortunately. The kernel > instruction decoder is also not a text disassembler. Changing it to do > that would be a quite large project. Pity, using this patch will not help with that and will add yet another form of disassembly. But then its a nice feature to have :-\ I'll test it. > > It would be great if we could, if done that way, perhaps at some point > > we could stop using objdump somehow :-\ > > objdump does a lot of work to line up the source code correctly. > Reproducing it would be a lot of work in perf too, and need > large scales changes. Perhaps at some time, but not any time > soon. - Arnaldo
