Messages in this thread | | | Date | Fri, 21 Nov 2008 17:33:07 +0100 | From | "stephane eranian" <> | Subject | Re: debugctl msr |
| |
On Fri, Nov 21, 2008 at 5:10 PM, Metzger, Markus T <markus.t.metzger@intel.com> wrote: >>-----Original Message----- >>From: stephane eranian [mailto:eranian@googlemail.com] >>Sent: Freitag, 21. November 2008 16:27 >>To: Metzger, Markus T >>Cc: Markus Metzger; Ingo Molnar; Andi Kleen; Andrew Morton; >>linux-kernel@vger.kernel.org >>Subject: Re: debugctl msr > >>The absolute maximum MUST be at buffer+size+1 but the >>threshold can be anywhere >>between the start of the buffer and buffer+size. You had it set past >>the end of the buffer (at +1), >>therefore PEBS was not generating any interrupts. > > The default is cyclic mode, which requires the interrupt threshold > to be outside of the buffer. > That's not what I need.
> A request for interrupt mode should have got you -EOPNOTSUPP.
I did not try that.
> > Absolute max should be one byte beyond the buffer, which > is base + size. > My bad ;-<
| |