On Thu, Aug 23, 2018 at 10:17:29AM -0700, Jason Thorpe wrote: > > > On Aug 23, 2018, at 8:47 AM, Anders Magnusson <ra...@ludd.ltu.se> wrote: > > > I have used it not long ago for vax. Maybe I did have to do some tweaks, > > do not remember, > > but I really want to be able to use kernel profiling on vax. > > > > So, I really oppose removing it and leaving vax without any kernel > > profiling choice. > > How hard would it be to add support for dtrace on Vax?
Without FBT, probably pretty easy. But of course FBT is the only plausible replacement for a statistical profiler that DTrace offers. The basic requirement for FBT is a dynamic patcher (to really do it right); though some __predict-false branches can be inserted at the head of every function and a global used instead. -- Thor Lancelot Simon t...@panix.com "Whether or not there's hope for change is not the question. If you want to be a free person, you don't stand up for human rights because it will work, but because it is right." --Andrei Sakharov
