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References: <20221117060123.209-1-jackx.lin@intel.com>
In-Reply-To: <20221117060123.209-1-jackx.lin@intel.com>
From: "Pedro Falcato" <pedro.falcato@gmail.com>
Date: Thu, 17 Nov 2022 14:09:27 +0000
Message-ID: <CAKbZUD2Qebad9TAfxZm9EhJh+y5kDGeovwnjLaRV6hKs0z2yRQ@mail.gmail.com>
Subject: Re: [edk2-devel] [edk2-platforms: PATCH] BIOS needs to present cores in order of relative performance in MADT
To: devel@edk2.groups.io, JackX.Lin@intel.com
Cc: Chasel Chiu <chasel.chiu@intel.com>, Nate DeSimone <nathaniel.l.desimone@intel.com>, 
	Isaac Oram <isaac.w.oram@intel.com>, Liming Gao <gaoliming@byosoft.com.cn>, 
	Eric Dong <eric.dong@intel.com>, Donald Kuo <Donald.Kuo@intel.com>, 
	Chandana C Kumar <chandana.c.kumar@intel.com>
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On Thu, Nov 17, 2022 at 6:01 AM JackX Lin <JackX.Lin@intel.com> wrote:

> BIOS should keep MADT ordering by big core first then small core
>

Hi Jack,

Can you please elaborate why this is required? AFAIK nowhere in the ACPI
spec does it say you need to order by big-little cores.
Is this some sort of regression for a specific OS? A useful commit message
and/or some comments would be really useful here for posterity.

Thanks,
Pedro Falcato

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<div dir=3D"ltr"><div><div dir=3D"ltr">On Thu, Nov 17, 2022 at 6:01 AM Jack=
X Lin &lt;<a href=3D"mailto:JackX.Lin@intel.com">JackX.Lin@intel.com</a>&gt=
; wrote:</div><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex">BIOS should keep MADT ordering by big core first then small=
 core<br></blockquote><div><br></div><div>Hi Jack,</div><div><br></div><div=
>Can you please elaborate why this is required? AFAIK nowhere in the ACPI s=
pec does it say you need to order by big-little cores.</div><div>Is this so=
me sort of regression for a specific OS? A useful commit message and/or som=
e comments would be really useful here for posterity.=C2=A0 <br></div></div=
><br clear=3D"all"></div>Thanks,<br><div><div dir=3D"ltr" class=3D"gmail_si=
gnature"><div dir=3D"ltr">Pedro Falcato</div></div></div></div>

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