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	<20120607205836.GT27374@one.firstfloor.org>
Date: Thu, 7 Jun 2012 23:37:16 +0200
Message-ID: <CABPqkBQ1qHn-OaxcB_hde0BO7fWsyvaQ8WqxSBBHcghqkjnm0Q@mail.gmail.com>
Subject: Re: perf user tool precise attribute broken in 3.5rc1+
From: Stephane Eranian <eranian@google.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: acme@redhat.com, jolsa@redhat.com, linux-kernel@vger.kernel.org
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On Thu, Jun 7, 2012 at 10:58 PM, Andi Kleen <andi@firstfloor.org> wrote:
> 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@firstfloor.org> wrote:
>> >
>> > With a perf user tool compiled from a 3.5rc1+ kernel I cannot
>> > use the 'p' attribute anymore. Always get
>> >
>> > ak@petrock:~> ./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.

What's -E?

>
> -Andi
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