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

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Date:	Tue, 8 Oct 2013 14:58:11 +1100
From:	Michael Ellerman <michael@...erman.id.au>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
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

On Thu, Oct 03, 2013 at 10:57:57AM -0700, Sukadev Bhattiprolu wrote:
> 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.

So doesn't that give you PME_PM_CYC ?

cheers
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