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Date: Fri, 18 Mar 2011 15:56:47 +0200
From: Kostik Belousov <kostikbel@gmail.com>
To: Bruce Evans <brde@optusnet.com.au>
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Cc: freebsd-hackers@freebsd.org, Jung-uk Kim <jkim@freebsd.org>,
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Subject: Re: get_cyclecount(9) deprecation
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On Fri, Mar 18, 2011 at 05:26:53PM +1100, Bruce Evans wrote:
...
> - set cputicker() has some design bugs.  It assumes that the tick frequency
>   is the same across all CPUs, but the TSC is per-CPU.  I have an old SMP
>   system with CPUs of different frequency that can demonstrate bugs from
>   this.
We definitely do not support configurations with different models of
CPUs in SMP, this is what Simmetric is about. Different as in frequency
or stepping.

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