linux-kernel - Context Switch Timer in Linux

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Date:	Mon, 1 Oct 2012 10:22:24 -0500
From:	Xin Tong <xerox.time.tech@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Context Switch Timer in Linux

I am wondering what timer is used for preemptive context switches in
linux 2.6+ x86 ? the PIT can fire at fixed interval, but it is not
per-cpu, i.e. can be handled by any CPU in the SMP system ? is Linux
using the APIC timer ?

Xin
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