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    SubjectRe: perf: regression -- missing /sys/devices/system/cpu/perf_events
    On Tue, 24 May 2011, Ingo Molnar wrote:
    >
    > So, what is wrong with the method Peter suggested: the presence of the perf
    > syscall (it not returning -ENOSYS) is bona fide evidence that perf is
    > available.

    it's just hard to do that from a shell script.

    also, running the perf syscall can be tricky if you have a new kernel but
    an older set of header files that doesn't have the syscall number defined.

    Vince
    vweaver1@eecs.utk.edu


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