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    SubjectRe: [PATCH] perf: make more self-descriptive (v5)

    On 09/23/2011 03:04 AM, Stephane Eranian wrote:
    > On Fri, Sep 23, 2011 at 10:03 AM, Pekka Enberg <> wrote:
    >> Hi Stephane!
    >> On Fri, Sep 23, 2011 at 10:31 AM, Stephane Eranian <> 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

    Earlier I gave an example for a 2 socket, quad-core with hyperthreading
    (16 cpus total):
    The information is repetitive. It would be better to devise a way to
    reduce the repetition versus truncate the information.


    > 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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