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Subject: Re: perf top broken on ppc64
From: Ian Munsie <imunsie@au1.ibm.com>
To: Alexander Graf <agraf@suse.de>
In-reply-to: <594EC076-62C6-473D-9AF2-47AEE4B57ED3@suse.de>
References: <594EC076-62C6-473D-9AF2-47AEE4B57ED3@suse.de>
Date: Wed, 21 Apr 2010 15:29:19 +1000
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Cc: Peter Zijlstra <peterz@infradead.org>,
	LKML Mailing List <linux-kernel@vger.kernel.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@elte.hu>,
	ppc-dev <linuxppc-dev@lists.ozlabs.org>
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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