linux-kernel - Re: Cache line size

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Message-ID: <20060911023950.GF4743@redhat.com>
Date:	Sun, 10 Sep 2006 22:39:50 -0400
From:	Dave Jones <davej@...hat.com>
To:	John Richard Moser <nigelenki@...cast.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Cache line size

On Sun, Sep 10, 2006 at 08:34:46PM -0400, John Richard Moser wrote:
 
 > Is there a way for the Linux Kernel to know the cache line size of the
 > CPU it's on, besides #define X86_CACHE_LINE_SZ 32 or whatnot?  I am
 > looking in /proc/cpuinfo trying to determine how to run caching
 > optimizations and interested in this information and its implications.
 > It may also be useful if I can get this information at run time in
 > application code.

You can use /dev/cpu/x/cpuid to read it directly from the CPU.
See the source of x86info for examples.

	Dave
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