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

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Message-ID: <CABPqkBTjQjaDfUctg5jm2JLQLWfC9uUBT_zi+F4DrRhRqtYF1g@mail.gmail.com>
Date:	Fri, 17 Jul 2015 11:06:57 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Dasaratharaman Chandramouli 
	<dasaratharaman.chandramouli@...el.com>,
	Jacob Pan Jun <jacob.jun.pan@...ux.intel.com>,
	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 <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Nikhil Rao <nikhil.rao@...el.com>
Subject: Re: [PATCH] perf/x86/intel/rapl: Add support for Knights Landing (KNL)

On Fri, May 29, 2015 at 4:55 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Tue, May 26, 2015 at 11:47:39AM -0700, Dasaratharaman Chandramouli 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.
>>
>
> Please also Cc the author of the code you're patching.
>
Acked-by: Stephane Eranian <eranian@...gle.com>

> Cc: Stephane Eranian <eranian@...gle.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;
>
>                 break;
>
> ?
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