linux-kernel - Re: [PATCH v4: kvm 1/4] Code motion. Separate timer intialization into an indepedent function.

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Message-ID: <4AC3821D.2050900@redhat.com>
Date:	Wed, 30 Sep 2009 06:06:53 -1000
From:	Zachary Amsden <zamsden@...hat.com>
To:	Avi Kivity <avi@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [PATCH v4: kvm 1/4] Code motion.  Separate timer intialization
 into an indepedent function.

On 09/30/2009 05:56 AM, Avi Kivity wrote:
> On 09/30/2009 05:51 PM, Zachary Amsden wrote:
>
> If the API allows us to query the tsc frequency, it would simply 
> return the same values in all cases, which we'd ignore.

The API only allows querying the processor frequency.  In the 
constant_tsc case, the highest processor frequency is likely going to be 
the actual TSC frequency, but I don't think it's a guarantee; 
theoretically, it could be faster on normal hardware ... or slower on 
overclocked hardware with an externally clocked TSC.

Zach
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