2012-10-01 15:22:28

by Xin Tong

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