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Date: Sun, 16 Jul 2006 08:07:58 +1000
From: Anton Blanchard <anton@samba.org>
To: Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH 0/3] powerpc: Instrument Hypervisor Calls
Message-ID: <20060715220757.GA31511@krispykreme>
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Cc: Bryan Rosenburg <rosnbrg@us.ibm.com>, linuxppc-dev@ozlabs.org,
	Nathan Lynch <ntl@pobox.com>, Paul Mackerras <paulus@samba.org>,
	Christopher Yeoh <cyeoh@samba.org>
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> Not sure I follow you. I would expect the PURR value to be restored after
> a context switch, even if we continue on a different physical CPU.
> 
> The idea behind monitoring both PURR and timebase is that the difference
> between the two tells you how long the partition was suspended during
> the hcall.

Sounds good, last time I looked at the patch I thought it was gathering
the PURR only. That on its own would make for some confusing results.

Anton