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    SubjectRe: [RFC][PATCH 07/11] perf: Provide PERF_SAMPLE_REGS
    Em Thu, Mar 04, 2010 at 03:59:08AM +0100, Ingo Molnar escreveu:
    >
    > * David Miller <davem@davemloft.net> wrote:
    >
    > > And more generally aren't we supposed to be able to eventually analyze perf
    > > dumps on any platform not just the one 'perf' was built under?
    >
    > A aidenote: in this cycle Arnaldo improved this aspect of perf (and those
    > changes are now upstream). In theory you should be able to do a 'perf record'
    > + 'perf archive' on your Sparc box and then analyze it via 'perf report' on an
    > x86 box - and vice versa.
    >
    > ( Note, it was not tested in that specific combination - another combination
    > was tested by Arnaldo: 32-bit PA-RISC profile interpreted on 64-bit x86. )

    It was the other way around, 64-bit x86 interpreted on 64-bit PARISC.
    Should work in any direction.

    Caveats:

    perf archive requires build-ids, the kernel has them in distros that
    have this support in their toolchain, enabled unconditionally since
    about 2.6.24.

    If vmlinux is available, it will be used, if not a copy of
    /proc/kallsyms is made and as well is keyed by build-id.

    I have plans to cope with build-id-less systems, but no code yet.

    - Arnaldo


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