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SubjectRe: [PATCH] perf/x86/intel/rapl: Add support for Knights Landing (KNL)
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.

Cc: Stephane Eranian <eranian@google.com>
> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.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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