On Mon, 2015-06-22 at 11:52 -0700, Stephane Eranian wrote:
> On Fri, May 29, 2015 at 4:55 AM, Peter Zijlstra <pet...@infradead.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.
> >
> > Cc: Stephane Eranian <eran...@google.com>
> > > Signed-off-by: Dasaratharaman Chandramouli
> > > <dasaratharaman.chandramo...@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);
>
>
> Does KNL also have different raw units for RAM requiring the use of the quirk?
That is right. KNL's DRAM has a different fixed energy unit (2^-16J)
similar to that of HSW
>
> >
> > > + rapl_cntr_mask = RAPL_IDX_KNL;
> > > + rapl_pmu_events_group.attrs = rapl_events_knl_attr;
> >
> > break;
> >
> > ?
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