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    SubjectRe: [PATCH] perf: make perf.data more self-descriptive (v5)
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    On Fri, Sep 23, 2011 at 10:03 AM, Pekka Enberg <penberg@cs.helsinki.fi> wrote:
    > Hi Stephane!
    >
    > On Fri, Sep 23, 2011 at 10:31 AM, Stephane Eranian <eranian@google.com> wrote:
    >>> So how important is this information? The output is going to be somewhat
    >>> awkward for very large CPU counts... :-)
    >>>
    >> It is useful to determine how CPUs share caches for instance.
    >> It can get large but large, but the meta-data header is not printed by
    >> default, you need to request it with the -I option.
    >
    > Well, sure but it blocks rest of the interesting information too. It seems to me
    > that the CPU information could be truncated to some sane limit by default and
    > introduce a command line option for users that really want to see all of it.
    >
    Ok, so here is a proposal:
    - reorder the info so one liners appear first
    - display the "truncated" info by default (no option)
    - truncated: numa topo, cpu topo, stop after 4 cpus/nodes, print msg
    to hint at -I option
    - use -I to print the extended header info report

    That way we do no introduce two options just for the header information.

    How about that instead?


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