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    SubjectRe: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

    * Frank Ch. Eigler <fche@redhat.com> wrote:

    > > Why are your despatching overheads 1000 cycles ? (and if its due to
    > > int3 why are you using int 3 8))
    >
    > Smart teams from IBM and Hitachi have been hammering away at this code
    > for a year or two now, and yet (roughly) here we are. There have been
    > experiments involving plopping branches instead of int3's at probe
    > locations, but this is self-modifying code involving multiple
    > instructions, and appears to be tricky on SMP/preempt boxes.

    i am talking to them about that, and i'm 100% sure the solution is much
    easier than the many (much harder) problems that SystemTap has already
    solved. I think you are way too modest to realize how powerful (and
    important) SystemTap is :-)

    Ingo
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