linux-kernel - [HELP] Documentation on CPU:/sys/devices/system/cpu/cpuX/cache/indexX/shared_cpu

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Message-ID: <CACbbJybOB5x=FKA4GADZSPr3=Jr9KOM1aHg3eBipoXLLnJ6fEw@mail.gmail.com>
Date:	Tue, 23 Apr 2013 21:07:44 +0800
From:	Ren Zhen <darwin.xupt@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [HELP] Documentation on CPU:/sys/devices/system/cpu/cpuX/cache/indexX/shared_cpu_map

Hi all:
    Can anybody help me to understand the usage of 'shared_cpu_map' in
/sys/devices/system/cpu/cpuX/cache/indexX/.
    when I execute the cmd--'#cat shared_cpu_map', it retures '05'.
     And my computer use Ubuntu12.04,Intel core i3 CPU.
     I have read one email in LKML,it says:

"The patch also adds a bunch of interfaces under
/sys/devices/system/cpu/cpuX/cache, showing various information about the
caches.  Most useful field being shared_cpu_map, which says what caches are
shared among which logical cpus. "

     But I still cannot catch the meaning of  'which says what caches
are shared among which logical cpus'.
     Thanks.
--
Sincerely,
Ren Zhen
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