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    SubjectRe: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)
    On 01/19/2010 12:15 AM, Jim Keniston wrote:
    >
    >> I don't like the idea but if the performance benefits are real (are
    >> they?),
    >>
    > Based on what seems to be the closest thing to an apples-to-apples
    > comparison -- counting the number of calls to a specified function --
    > uprobes is 6-7 times faster than the ptrace-based equivalent, ltrace -c.
    > And of course, uprobes provides much, much more flexibility, appears to
    > scale better, and works with multithreaded apps.
    >
    > Likewise, FWIW, utrace is more than 10x faster than strace -c in
    > counting system calls.
    >
    >

    This is still with a kernel entry, yes? Do you have plans for a variant
    that's completely in userspace?

    --
    error compiling committee.c: too many arguments to function



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