On Fri, Sep 23, 2016 at 02:27:20PM +0300, Alexander Shishkin wrote: > Hi Peter, > > This is an RFC, I'm not sending the tooling bits in this series, > although they can be found here [1]. > > This series introduces AUX data sampling for perf events, which in > case of our instruction/branch tracing PMUs like Intel PT, BTS, CS > ETM means execution flow history leading up to a perf event's > overflow.
This fails to explain _WHY_ this is a good thing to have. What kind of analysis does this enable, and is that fully implemented in [1] (I didn't look). Please provide a bit more justification.
