linux-kernel - Re: perf user tool precise attribute broken in 3.5rc1+

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Date:	Thu, 7 Jun 2012 22:58:36 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>, acme@...hat.com,
	jolsa@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: perf user tool precise attribute broken in 3.5rc1+

On Thu, Jun 07, 2012 at 10:53:19PM +0200, Stephane Eranian wrote:
> On Thu, Jun 7, 2012 at 10:23 PM, Andi Kleen <andi@...stfloor.org> wrote:
> >
> > With a perf user tool compiled from a 3.5rc1+ kernel I cannot
> > use the 'p' attribute anymore. Always get
> >
> > ak@...rock:~> ./perf record -e cycles:p ./t
> >
> >  Error: sys_perf_event_open() syscall returned with 22 (Invalid argument).  /bin/dmesg may provide additional information.
> >
> >  Fatal: No CONFIG_PERF_EVENTS=y kernel support configured?
> >
> Remember that PEBS is disabled on SNB unless you have the new ucode + my patch.

This is not the problem. This was actually a -E where it was not disabled
in my tree.  And the older perf binary works, so it's clearly not a kernel 
problem.

-Andi
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