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SubjectRe: do_gettimeofday vs. rdtsc in the scheduler
On Tue, Sep 17, 2002 at 04:46:49PM -0700, David S. Miller wrote:
> From: Andi Kleen <>
> Date: Wed, 18 Sep 2002 01:52:09 +0200
> On Tue, Sep 17, 2002 at 04:32:46PM -0700, David S. Miller wrote:
> > I know full well it isn't currently :-)
> Sorry, it's wrong. The x86 architecture has several such registers
> Not in the processor, and not architectually specified.
> All of the things you list are in the scope of things outside
> the cpu.

The local APIC timer is specified in the Intel Manual volume 3 for example.
It's an optional feature (CPUID), but pretty much everyone has it.


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