Unfortunately for me, the fact that rr can't run on Ryzen CPUs is a dealbreaker....

aleden · on Aug 10, 2017

I am wondering why this isn't getting more attention.

> It appears that the Ryzen PMU just isn't quite accurate enough :-(. rr > might work OK for some kinds of usage but I wouldn't recommend it. > > I'll land the patches I have with a warning for Ryzen users that things > won't be reliable.

Can someone with a technical understanding describe what's going on here? Is this a flat-out bug- or does the x86 architecture spec allow for this?

gcp · on Aug 10, 2017

Awwww :( That's really sad.

rr is important enough for C++ development that I agree it's dealbreaker.