Re: "cpuset -n prefer:?" --what values for "?" are supposed to be allowed? (only 1 is, despite two numa domains)

From: Mark Johnston <markj_at_freebsd.org>
Date: Wed, 11 Sep 2019 11:15:12 -0400
On Wed, Sep 11, 2019 at 07:57:26AM -0700, Mark Millard wrote:
> 
> 
> On 2019-Sep-11, at 07:31, Mark Johnston <markj at freebsd.org> wrote:
> 
> > On Tue, Sep 10, 2019 at 10:58:05PM -0700, Mark Millard wrote:
> >> In a context with:
> >> 
> >> # cpuset -g
> >> pid -1 mask: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
> >> pid -1 domain policy: first-touch mask: 0, 1
> >> 
> >> I get:
> >> 
> >> # cpuset -l0 -n prefer:0 COMMAND
> >> cpuset: setdomain: Invalid argument
> >> 
> >> # cpuset -l0 -n prefer:2 COMMAND
> >> cpuset: setdomain: Invalid argument
> >> 
> >> But one prefer:? value does allow the COMMAND
> >> to run:
> >> 
> >> # cpuset -l0 -n prefer:1 COMMAND
> >> 
> >> This seem odd to me. Am I missing something?
> >> 
> >> For reference: I'm using a ThreadRipper 1950X
> >> with a head -r351227 based context for this
> >> activity. The above happens to have been run
> >> in a Windows 10 Pro HyperV session, instead
> >> of in a native-boot of the same media. (A
> >> native-boot would have had 32 CPUs.)
> > 
> > Can you please show the output of "sysctl vm.phys_segs" from this
> > setup?
> 
> Sure:

I was wondering if you had only one domain populated, but it seems not
to be the case.  Could you try updating to r351672 or later and see if
the behaviour persists?
Received on Wed Sep 11 2019 - 13:15:18 UTC

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