linux-kernel - Re: [tip:perf/core] perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events

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Date:	Fri, 6 May 2011 21:08:21 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	mingo@...hat.com, hpa@...or.com, acme@...hat.com,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	efault@....de, fweisbec@...il.com, ming.m.lin@...el.com,
	tglx@...utronix.de, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf events, x86: Add SandyBridge
 stalled-cycles-frontend/backend events


* Steven Rostedt <rostedt@...dmis.org> wrote:

> On Fri, 2011-05-06 at 07:40 +0000, tip-bot for Lin Ming wrote:
> > Commit-ID:  e04d1b23f9706186187dcb0be1a752e48dcc540b
> > Gitweb:     http://git.kernel.org/tip/e04d1b23f9706186187dcb0be1a752e48dcc540b
> > Author:     Lin Ming <ming.m.lin@...el.com>
> > AuthorDate: Fri, 6 May 2011 07:14:02 +0000
> > Committer:  Ingo Molnar <mingo@...e.hu>
> > CommitDate: Fri, 6 May 2011 09:37:03 +0200
> > 
> > perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events
> > 
> > Extend the Intel SandyBridge PMU driver with definitions
> > for generic front-end and back-end stall events.
> > 
> > ( As commit 3011203 "perf events, x86: Add Westmere stalled-cycles-frontend/backend
> >   events" says, these are only approximations. )
> 
> I now get the following build error:
> 
> In file included from /home/rostedt/work/autotest/nobackup/linux-test.git/arch/x86/kernel/cpu/perf_event.c:1449:0:
> /home/rostedt/work/autotest/nobackup/linux-test.git/arch/x86/kernel/cpu/perf_event_intel.c: In function 'intel_pmu_init':
> /home/rostedt/work/autotest/nobackup/linux-test.git/arch/x86/kernel/cpu/perf_event_intel.c:1479:27: error: 'PERF_COUNT_HW_STALLED_CYCLES_FRONTEND' undeclared (first use in this fun
> ction)
> /home/rostedt/work/autotest/nobackup/linux-test.git/arch/x86/kernel/cpu/perf_event_intel.c:1479:27: note: each undeclared identifier is reported only once for each function it appe
> ars in
> /home/rostedt/work/autotest/nobackup/linux-test.git/arch/x86/kernel/cpu/perf_event_intel.c:1481:27: error: 'PERF_COUNT_HW_STALLED_CYCLES_BACKEND' undeclared (first use in this func
> tion)
> 
> Config can be found here:
> 
> http://rostedt.homelinux.com/private/config-sandy-failed

Ok, could you check latest perf/core (57d524154ffe), does it work better?

Thanks,

	Ingo
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