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

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Message-ID: <20120607202355.GQ27374@one.firstfloor.org>
Date:	Thu, 7 Jun 2012 22:23:55 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	acme@...hat.com, jolsa@...hat.com, eranian@...gle.com,
	linux-kernel@...r.kernel.org
Subject: perf user tool precise attribute broken in 3.5rc1+


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?

./t: Terminated

With an older perf it works, so the kernel is ok.

ak@...rock:~> ./perf record -e cycles:p ./t
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.005 MB perf.data (~217 samples) ]
ak@...rock:~> 


-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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