linux-kernel - Re: [PATCH 00/19] latest numa/base patches

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Date:	Sat, 17 Nov 2012 16:40:07 +0800
From:	Alex Shi <lkml.alex@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Hugh Dickins <hughd@...gle.com>, Alex Shi <alex.shi@...el.com>
Subject: Re: [PATCH 00/19] latest numa/base patches

On Sat, Nov 17, 2012 at 4:35 PM, Alex Shi <lkml.alex@...il.com> wrote:
> Just find imbalance issue on the patchset.
>
> I write a one line program:
> int main ()
> {
>         int i;
>         for (i=0; i< 1; )
>                 __asm__ __volatile__ ("nop");
> }
> it was compiled with name pl and start it on my 2 socket * 4 cores *
> HT NUMA machine:
> the cpu domain top like this:
> domain 0: span 4,12 level SIBLING
>   groups: 4 (cpu_power = 589) 12 (cpu_power = 589)
>   domain 1: span 0,2,4,6,8,10,12,14 level MC
>    groups: 4,12 (cpu_power = 1178) 6,14 (cpu_power = 1178) 0,8
> (cpu_power = 1178) 2,10 (cpu_power = 1178)
>    domain 2: span 0,2,4,6,8,10,12,14 level CPU
>     groups: 0,2,4,6,8,10,12,14 (cpu_power = 4712)
>     domain 3: span 0-15 level NUMA
>      groups: 0,2,4,6,8,10,12,14 (cpu_power = 4712) 1,3,5,7,9,11,13,15
> (cpu_power = 4712)
>
> $for ((i=0; i< I; i++)); do ./pl & done
> when I = 2, they are running on cpu 0,12
> I = 4, they are running on cpu 0,9,12,14
> I = 8, they are running on cpu 0,4,9,10,11,12,13,14
>

Ops, it was tested on latest V15 tip/master tree, head is
a7b7a8ad4476bb641c8455a4e0d7d0fd3eb86f90
not on this series.
Sorry.
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