From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: [PATCH 0/2] Credit2: fix per-socket runqueue setup
Date: Mon, 25 Aug 2014 09:31:36 +0100
Message-ID: <53FB1088020000780002D105@mail.emea.novell.com>
References: <20140822165628.32764.15082.stgit@Solace.lan>
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To: Dario Faggioli <dario.faggioli@citrix.com>
Cc: george.dunlap@eu.citrix.com, Andrew Cooper <andrew.cooper3@citrix.com>, keir@xen.org, xen-devel <xen-devel@lists.xenproject.org>
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>>> On 22.08.14 at 19:15, <dario.faggioli@citrix.com> wrote:
> root@tg03:~# xl dmesg |grep -i runqueue
> (XEN) Adding cpu 0 to runqueue 1
> (XEN)  First cpu on runqueue, activating
> (XEN) Adding cpu 1 to runqueue 1
> (XEN) Adding cpu 2 to runqueue 1
> (XEN) Adding cpu 3 to runqueue 1
> (XEN) Adding cpu 4 to runqueue 1
> (XEN) Adding cpu 5 to runqueue 1
> (XEN) Adding cpu 6 to runqueue 1
> (XEN) Adding cpu 7 to runqueue 1
> (XEN) Adding cpu 8 to runqueue 1
> (XEN) Adding cpu 9 to runqueue 1
> (XEN) Adding cpu 10 to runqueue 1
> (XEN) Adding cpu 11 to runqueue 1
> (XEN) Adding cpu 12 to runqueue 0
> (XEN)  First cpu on runqueue, activating
> (XEN) Adding cpu 13 to runqueue 0
> (XEN) Adding cpu 14 to runqueue 0
> (XEN) Adding cpu 15 to runqueue 0
> (XEN) Adding cpu 16 to runqueue 0
> (XEN) Adding cpu 17 to runqueue 0
> (XEN) Adding cpu 18 to runqueue 0
> (XEN) Adding cpu 19 to runqueue 0
> (XEN) Adding cpu 20 to runqueue 0
> (XEN) Adding cpu 21 to runqueue 0
> (XEN) Adding cpu 22 to runqueue 0
> (XEN) Adding cpu 23 to runqueue 0
> 
> Which makes a lot more sense. :-)

But it looks suspicious that the low numbered CPUs get assigned to
runqueue 1. Is there an explanation for this, or are surprises to be
expected on larger than dual-socket systems?

Jan