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Subject: Re: Intel Haswell support - Any updates?
From: Michael Gmelin <grembo@freebsd.org>
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In-Reply-To: <20150918053445.GA1929@c720-r276659>
Date: Fri, 18 Sep 2015 10:56:34 +0200
Cc: Nikola Pajkovsky <n.pajkovsky@gmail.com>,
 Stefan Wendler <stefan.wendler@tngtech.com>, freebsd-current@freebsd.org
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References: <55FA7324.5010603@icloud.com> <55FADB38.7000406@pcbsd.org>
 <87twqt2gs9.fsf@gooddata.com> <11271727.FrCOrXGY1l@hactar>
 <87a8sk205y.fsf@gooddata.com> <20150918053445.GA1929@c720-r276659>
To: Matthias Apitz <guru@unixarea.de>
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> On 18 Sep 2015, at 07:34, Matthias Apitz <guru@unixarea.de> wrote:
>=20
>> El d=C3=ADa Thursday, September 17, 2015 a las 11:42:01PM +0200, Nikola P=
ajkovsky escribi=C3=B3:
>>=20
>> Do not run those commands in X, otherwise it hangs.
>>=20
>> $ vidcontrol -i mode | grep 1920
>> 383 (0x17f) 0x0000000f G 1920x1080x32 D  8x16  0xa0000 64k 64k 0xe0000000=
 8100k
>=20
> On my C720 the above cmd does not give any usefull information:
>=20
>=20
>    mode#     flags   type    size       font      window      linear buffe=
r
> --------------------------------------------------------------------------=
----
>  0 (0x000) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0k=
 0x00000000 0k
>  1 (0x001) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0k=
 0x00000000 0k
>  2 (0x002) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0k=
 0x00000000 0k
>  3 (0x003) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0k=
 0x00000000 0k
>  4 (0x004) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0k=
 0x00000000 0k
>  5 ...
>=20
>=20
> 507 (0x1fb) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0=
k 0x00000000 0k
> 508 (0x1fc) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0=
k 0x00000000 0k
> 509 (0x1fd) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0=
k 0x00000000 0k
> 510 (0x1fe) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0=
k 0x00000000 0k
> 511 (0x1ff) 0x00000000 T 0x0             0x402653478 0x280996d6 131362k  0=
k 0x00000000 0k
>=20

Last time I checked on the c720, the correct memory areas were marked as wri=
te-combine by default (see "memcontrol list"), so you can't accomplish any f=
urther performance gains by tuning it manually.

- m