Re: [PATCH] perf: make perf.data more self-descriptive (v5)

[Stephane Eranian]

On Fri, Sep 23, 2011 at 8:40 AM, Pekka Enberg <penberg@xxxxxxxxxxxxxx> wrote:
> On Thu, Sep 22, 2011 at 3:31 PM, Stephane Eranian <eranian@xxxxxxxxxx> wrote:
>> # CPU0 sibling cores Â: 0-3
>> # CPU0 sibling threads: 0
>> # CPU1 sibling cores Â: 0-3
>> # CPU1 sibling threads: 1
>> # CPU2 sibling cores Â: 0-3
>> # CPU2 sibling threads: 2
>> # CPU3 sibling cores Â: 0-3
>> # CPU3 sibling threads: 3
>> # total memory: 8093212 kB
>> # cpuid : GenuineIntel,6,15,11
>
> 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.
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