linux-kernel - Re: perf top broken on ppc64

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Message-Id: <1271827490-sup-48@au1.ibm.com>
Date:	Wed, 21 Apr 2010 15:29:19 +1000
From:	Ian Munsie <imunsie@....ibm.com>
To:	Alexander Graf <agraf@...e.de>
Cc:	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	ppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	LKML Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: perf top broken on ppc64

Excerpts from Alexander Graf's message of Wed Apr 21 09:21:36 +1000 2010:
> Hi,
> 
> While trying to find out performance bottlenecks in KVM for PowerPC I
> figured I'd try and use "perf top" to see what's going on in the
> system. This works great on my G4, but doesn't on the Powerstation
> (970MP).
> 
> The only weird thing I can imagine about this setup is that I'm
> running 32 bit userland on a 64 bit kernel. So I went ahead and
> compiled perf for ppc64 - without any change:

I'm using 32 bit userland and 64 bit kernel on a PowerPC box and it's working for me.
Are you building perf from the tip tree?

Cheers,
-Ian
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