ARM Cortex A9: LL counters

Javier Picorel javier.picorel at
Sat Jul 6 16:21:54 EDT 2013

That will be perfect. Is there any way to access these memory mapped counters?
From: Will Deacon [will.deacon at]
Sent: 05 July 2013 12:12
To: Javier Picorel
Cc: linux-arm-kernel at; Mark Rutland
Subject: Re: ARM Cortex A9: LL counters

On Fri, Jul 05, 2013 at 12:44:58AM +0100, Javier Picorel wrote:
> Thanks for the clarification! However, correct me if I'm wrong but, doesn't this mean that the "CO_LF_MISS" counter refers to L2 accesses? Thanks!

It will certainly account for some of them, but I wouldn't be surprised if
you can generate L2 accesses in ways other than missing at coherent L1.

You could look at the L2 counters and compare.


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