Messages in this thread | | | Date | Fri, 15 Sep 2006 20:23:33 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 |
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* 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 :-)
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