Re: [Xen-devel] [PATCH for-4.13] xen/sched: Render sibling/core masks with %pbl to improve 'r' debugkey

[Jürgen Groß <jgross@xxxxxxxx>]

On 13.11.19 19:36, Andrew Cooper wrote:
> For system with large numbers of CPUs, the 'r' debugkey is unwieldy.  Sibling
> and core masks are a single block of adjacent bits, so are vastly shorter to
> render with %pbl.
>
> Before:
>    (XEN) CPU[00] nr_run=0, sort=157, 
> sibling=00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003,
>  core=00000000,00000000,00000000,00000000,ffffffff,ffffffff,ffffffff,ffffffff
>    (XEN) CPU[01] nr_run=0, sort=13750, 
> sibling=00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003,
>  core=00000000,00000000,00000000,00000000,ffffffff,ffffffff,ffffffff,ffffffff
>    (XEN) CPU[02] nr_run=0, sort=188, 
> sibling=00000000,00000000,00000000,00000000,00000000,00000000,00000000,0000000c,
>  core=00000000,00000000,00000000,00000000,ffffffff,ffffffff,ffffffff,ffffffff
>    (XEN) CPU[03] nr_run=0, sort=13730, 
> sibling=00000000,00000000,00000000,00000000,00000000,00000000,00000000,0000000c,
>  core=00000000,00000000,00000000,00000000,ffffffff,ffffffff,ffffffff,ffffffff
>
> After:
>    (XEN) CPU[00] nr_run=0, sort=1169, sibling={0-1}, core={0-127}
>    (XEN) CPU[01] nr_run=0, sort=2488, sibling={0-1}, core={0-127}
>    (XEN) CPU[02] nr_run=0, sort=1210, sibling={2-3}, core={0-127}
>    (XEN) CPU[03] nr_run=0, sort=2476, sibling={2-3}, core={0-127}
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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