linux-kernel - Re: [PATCH 02/12] perf, x86: Basic Haswell PMU support v2

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Message-ID: <20130128161616.GS30577@one.firstfloor.org>
Date:	Mon, 28 Jan 2013 17:16:16 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 02/12] perf, x86: Basic Haswell PMU support v2

> > +static struct event_constraint intel_hsw_event_constraints[] =
> > +{
> > +       FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> > +       FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
> > +       FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
> > +       INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
> 
> You're covering the entire event here, so comment should be: L1D_PEND_MISS.*

Ok.

> 
> > +       INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
> > +       INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
> > +       EVENT_CONSTRAINT_END
> 
> You are missing constraint on the following public events:
> - CYCLE_ACTIVITY (0xa3)

AFAIK that's not a PEBS event.

> 
> > +};
> > +
> >  static u64 intel_pmu_event_map(int hw_event)
> >  {
> >         return intel_perfmon_event_map[hw_event];
> > @@ -2107,6 +2118,24 @@ __init int intel_pmu_init(void)
> >                 break;
> >
> >
> > +       case 60: /* Haswell Client */
> > +       case 70:
> > +       case 71:
> > +               memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
> > +                      sizeof(hw_cache_event_ids));
> > +
> > +               intel_pmu_lbr_init_nhm();
> > +
> I suspect this one should be intel_pmu_lbr_init_snb(), otherwise
> you inherit the broken filter workarounds.

Good point.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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