Re: [PATCH 0/4] perf, amd: Enable AMD family 15h northbridge counters
From: Robert Richter
Date: Sat Nov 10 2012 - 06:50:31 EST
On 09.11.12 19:01:34, Jacob Shin wrote:
> The following patchset enables 4 additional performance counters in
> AMD family 15h processors that counts northbridge events -- such as
> DRAM accesses.
>
> This patchset is based on previous work done by Robert Richter
> <rric@xxxxxxxxxx> :
>
> https://lkml.org/lkml/2012/6/19/324
The original patch set of this is here (a rebased version):
http://git.kernel.org/?p=linux/kernel/git/rric/oprofile.git;a=shortlog;h=refs/heads/perf-nb
This code was tested in detail.
> The main differences are:
>
> - The northbridge counters are indexed contiguously right above the
> core performance counters.
>
> - MSR address offset calculations are moved to architecture specific
> files.
>
> - Interrups are set up to be delivered only to a single core.
So I rather suggest to make delta patches on top of my patches.
Peter's main concerns were that my patch set is not in the
Intel-uncore style. I started reworking this but was not able to
finish my work. This concerns still exist.
Due to the current situation I would rather prefer to create a
tip:perf/amd-nb branch that includes my patches and then add all
further necessary steps for mainline acceptance on top of it.
Thanks,
-Robert
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