linux-kernel - Re: [PATCH] perf/x86/intel/rapl: Add support for Knights Landing (KNL)

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Date:	Mon, 22 Jun 2015 10:17:47 -0700
From:	Dasaratharaman Chandramouli 
	<dasaratharaman.chandramouli@...el.com>
To:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Nikhil Rao <nikhil.rao@...el.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf/x86/intel/rapl: Add support for Knights Landing
 (KNL)

Ping. 

On Fri, 2015-05-29 at 10:06 -0700, Jacob Pan wrote:
> On Tue, 26 May 2015 11:47:39 -0700
> Dasaratharaman Chandramouli <dasaratharaman.chandramouli@...el.com>
> wrote:
> 
> > Knights Landing DRAM RAPL supports PKG and DRAM RAPL domains.
> > DRAM RAPL has a different fixed energy unit (2^-16J) similar to
> > that of HSW.
> > 
> Acked-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> > Signed-off-by: Dasaratharaman Chandramouli
> > <dasaratharaman.chandramouli@...el.com> ---
> >  arch/x86/kernel/cpu/perf_event_intel_rapl.c | 20 ++++++++++++++++++++
> >  1 file changed, 20 insertions(+)
> > 
> > diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
> > b/arch/x86/kernel/cpu/perf_event_intel_rapl.c index 999289b9..96633fb
> > 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
> > +++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
> > @@ -86,6 +86,10 @@ static const char
> > *rapl_domain_names[NR_RAPL_DOMAINS] __initconst =
> > { 1<<RAPL_IDX_RAM_NRG_STAT|\ 1<<RAPL_IDX_PP1_NRG_STAT)
> >  
> > +/* Knights Landing has PKG, RAM */
> > +#define RAPL_IDX_KNL	(1<<RAPL_IDX_PKG_NRG_STAT|\
> > +			 1<<RAPL_IDX_RAM_NRG_STAT)
> > +
> >  /*
> >   * event code: LSB 8 bits, passed in attr->config
> >   * any other bit is reserved
> > @@ -487,6 +491,18 @@ static struct attribute *rapl_events_hsw_attr[]
> > = { NULL,
> >  };
> >  
> > +static struct attribute *rapl_events_knl_attr[] = {
> > +	EVENT_PTR(rapl_pkg),
> > +	EVENT_PTR(rapl_ram),
> > +
> > +	EVENT_PTR(rapl_pkg_unit),
> > +	EVENT_PTR(rapl_ram_unit),
> > +
> > +	EVENT_PTR(rapl_pkg_scale),
> > +	EVENT_PTR(rapl_ram_scale),
> > +	NULL,
> > +};
> > +
> >  static struct attribute_group rapl_pmu_events_group = {
> >  	.name = "events",
> >  	.attrs = NULL, /* patched at runtime */
> > @@ -730,6 +746,10 @@ static int __init rapl_pmu_init(void)
> >  		rapl_cntr_mask = RAPL_IDX_SRV;
> >  		rapl_pmu_events_group.attrs = rapl_events_srv_attr;
> >  		break;
> > +	case 87: /* Knights Landing */
> > +		rapl_add_quirk(rapl_hsw_server_quirk);
> > +		rapl_cntr_mask = RAPL_IDX_KNL;
> > +		rapl_pmu_events_group.attrs = rapl_events_knl_attr;
> >  
> >  	default:
> >  		/* unsupported */
> 
> [Jacob Pan]


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