linux-kernel - Re: [PATCH v2 2/3] perf/x86/rapl: Support multiple rapl unit quirks

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Date:   Wed, 12 Aug 2020 11:29:06 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     Joe Perches <joe@...ches.com>, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org
Cc:     linux-pm@...r.kernel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, linux-kernel@...r.kernel.org,
        kan.liang@...ux.intel.com, len.brown@...el.com, rafael@...nel.org
Subject: Re: [PATCH v2 2/3] perf/x86/rapl: Support multiple rapl unit quirks

Hi,

Thanks for reviewing.

On Tue, 2020-08-11 at 11:19 -0700, Joe Perches wrote:
> On Tue, 2020-08-11 at 23:31 +0800, Zhang Rui wrote:
> > There will be more platforms with different fixed energy units.
> > Enhance the code to support different rapl unit quirks for
> > different
> > platforms.
> 
> This seems like one quirk per platform.
> 
> Should multiple quirks on individual platforms be supported?
> 
enum rapl_unit_quirk is just used as a flag.
multiple quirks can be deployed with the same flag, just like what I
did in patch 3/3.
Also different platforms can either have different flags or share the
same flag.

thanks,
rui

> > diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
> 
> []
> > @@ -130,11 +130,16 @@ struct rapl_pmus {
> >  	struct rapl_pmu		*pmus[];
> >  };
> >  
> > +enum rapl_unit_quirk {
> > +	RAPL_UNIT_QUIRK_NONE,
> > +	RAPL_UNIT_QUIRK_INTEL_HSW,
> > +};
> > +
> >  struct rapl_model {
> >  	struct perf_msr *rapl_msrs;
> >  	unsigned long	events;
> >  	unsigned int	msr_power_unit;
> > -	bool		apply_quirk;
> > +	enum rapl_unit_quirk	unit_quirk;
> >  };
> 
>