Re: [patch] voluntary-preempt-2.6.8-rc4-O7

Ingo Molnar
2004-08-13T11:34:24Z

* Florian Schmidt <mista.tapas@gmx.net> wrote:

> > in -O7 i've added a runtime flag to disable/enable tracing without
> > having to recompile the kernel:
> >
> > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8-rc4-O7
>
> I have one question: Are kernel frame pointers required for the
> latency traces? I had frame pointers on in my kernel config but wonder
> if they are nessecary or if i can save the cycles and kb [i'm not too
> big on kernel internals, so forgive the possibly stupid question]?..

-pg requires frame pointers, yes. The Kconfig change i did forces
framepointers on so it's automatic. (gcc bails out with an error on -pg
-fomit-frame-pointer)

> The other thing i wanted to say is: way to go man!! These patches rock
> my linux audio world. A big thank you from me and [probably] the whole
> linux audio community for the work you put into this!

you are welcome!

Ingo