Messages in this thread | | | Date | Tue, 19 Jan 2010 10:07:49 +0200 | From | Avi Kivity <> | Subject | Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP) |
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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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