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Subject: Re: svn commit: r305391 - head/sys/arm64/arm64
To: Andrew Turner <andrew@FreeBSD.org>, src-committers@freebsd.org,
 svn-src-all@freebsd.org, svn-src-head@freebsd.org
References: <201609041750.u84HoNtn056564@repo.freebsd.org>
From: Alan Cox <alc@rice.edu>
Message-ID: <61bfdc1a-24f6-a63d-7f33-b02d8c92dd21@rice.edu>
Date: Sun, 4 Sep 2016 13:02:44 -0500
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On 09/04/2016 12:50, Andrew Turner wrote:
> Author: andrew
> Date: Sun Sep  4 17:50:23 2016
> New Revision: 305391
> URL: https://svnweb.freebsd.org/changeset/base/305391
>
> Log:
>   Enable superpages on arm64 by default. These seem to be stable, havin=
g
>   survived multiple world and kernel builds, and of poudriere building =
full
>   package sets.
>  =20
>   I have observed a 3% reduction in buildworld times with superpages en=
abled,
>   however further testing is needed to see if this is observed in other=

>   workloads.
>  =20

Is the starting address of the text section on arm64 superpage aligned,
like it is on amd64?  If so, I expect that the reduction will increase
if you implement support for superpage mappings in pmap_enter_object().