linux-kernel - Re: [PATCH 2/9][v5] powerpc/perf: Export Power8 generic events in sysfs

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Date:	Thu, 3 Oct 2013 10:57:57 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Michael Ellerman <michael@...erman.id.au>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Michael Ellerman <michaele@....ibm.com>,
	linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@...gle.com>, linuxppc-dev@...abs.org,
	Paul Mackerras <paulus@...ba.org>,
	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/9][v5] powerpc/perf: Export Power8 generic events in
 sysfs

Michael Ellerman [michael@...erman.id.au] wrote:
| On Tue, Oct 01, 2013 at 05:15:03PM -0700, Sukadev Bhattiprolu wrote:
| > Export generic perf events for Power8 in sysfs.
| > 
| > Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
| > Reviewed-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
| > ---
| >  arch/powerpc/perf/power8-pmu.c |   23 +++++++++++++++++++++++
| >  1 file changed, 23 insertions(+)
| > 
| > diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
| > index 976c203..b991b2e 100644
| > --- a/arch/powerpc/perf/power8-pmu.c
| > +++ b/arch/powerpc/perf/power8-pmu.c
| > @@ -510,6 +510,28 @@ static void power8_disable_pmc(unsigned int pmc, unsigned long mmcr[])
| >  		mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
| >  }
| >  
| > +GENERIC_EVENT_ATTR(cpu-cyles,			PM_CYC);
| > +GENERIC_EVENT_ATTR(stalled-cycles-frontend,	PM_GCT_NOSLOT_CYC);
| > +GENERIC_EVENT_ATTR(stalled-cycles-backend,	PM_CMPLU_STALL);
| > +GENERIC_EVENT_ATTR(instructions,		PM_INST_CMPL);
| > +GENERIC_EVENT_ATTR(branch-instructions,		PM_BRU_FIN);
| > +GENERIC_EVENT_ATTR(branch-misses,		PM_BR_MPRED_CMPL);
| 
| And here you use PM_ not PME_ - I'm confused.

It is a bit confusing. The GENERIC_EVENT_ATTR() adds the PME_ prefix. I
kept this change minimal for now, since we will have to revisit this once
the Power8 events are finalized.

Sukadev

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