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    SubjectRe: debugctl msr
    On Fri, Nov 21, 2008 at 5:10 PM, Metzger, Markus T
    <> wrote:
    >>-----Original Message-----
    >>From: stephane eranian []
    >>Sent: Freitag, 21. November 2008 16:27
    >>To: Metzger, Markus T
    >>Cc: Markus Metzger; Ingo Molnar; Andi Kleen; Andrew Morton;
    >>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 ;-<

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