Re: [PATCH] x86/perf/intel/cqm: Get rid of the silly for_each_cpu lookups

From: Matt Fleming
Date: Wed Feb 17 2016 - 11:28:19 EST


On Wed, 17 Feb, at 05:08:57PM, Thomas Gleixner wrote:
> On Wed, 17 Feb 2016, Thomas Gleixner wrote:
>
> > CQM is a strict per package facility. Use the proper cpumasks to lookup the
> > readers.
>
> Sorry for the noise. PEBKAC: quilt refresh missing. Correct version below.
>
> Thanks,
>
> tglx
>
> 8<----------
>
> Subject: x86/perf/cqm: Get rid of the silly for_each_cpu lookups
> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Date: Sun, 14 Feb 2016 23:09:06 +0100
>
> CQM is a strict per package facility. Use the proper cpumasks to lookup the
> readers.
>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
> arch/x86/kernel/cpu/perf_event_intel_cqm.c | 34 ++++++++++-------------------
> 1 file changed, 12 insertions(+), 22 deletions(-)

Right, I just could not make the connection between
topology_core_cpumask() and topology_physical_package_id() when I
wrote this code.

Reviewed-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>