Re: [RFC] Add Arm cpu topology definition

From: Samuel Thibault
Date: Thu Jun 16 2011 - 05:02:02 EST


Vincent Guittot, le Thu 16 Jun 2011 10:49:13 +0200, a écrit :
> The affinity between Arm processors is defined in the MPIDR register.
> We can identify which processors are in the same cluster,
> and which ones have performance interdependency. The cpu topology
> of an Arm platform can be set thanks to this register and this topology
> is then used by sched_mc and sched_smt.

Cool! Could you check that the hwloc tool gets also gets this
information from userland through /sys, and/or send me the output of the
hwloc-gather-topology tool from hwloc so we can add an testcase for

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