Hi, I've noticed that there are quite a few hardware performance counter
patches (which allow access to things like the Pentium Model Specific
Registers for gathering profiling info) floating around, including Rabbit
(http://www.scl.ameslab.gov/Projects/Rabbit/), Richard Gooch's patches, and
PAPI (very cool and portable, IMHO). But I haven't seen any of these that
supports delivering interrupts when counters overflow (the last version of
PAPI that I saw provides high-level emulation of this on Linux/x86, but
it's not really accurate enough for serious work).
Is there any other patch that supports overflows on Linux/x86, or is it
work that still needs to be done? Monitoring these overflows is the trick
behind large parts of Intel's VTune and SGI's SpeedShop, and I'd love to
see a profiler like this come to Linux. Basically, I'm a student and I
think it would be an interesting project, but I don't want to re-invent the
wheel unnecessarily.
Thanks a lot!
--JRZ
PS Please CC me at zedlwski@princeton.edu with any replies, if you don't
mind.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Sep 23 2000 - 21:00:18 EST