Date: Sat, 22 May 2021 18:36:43 -0700 From: Mark Millard via freebsd-arm <freebsd-arm@freebsd.org> To: tech-lists <tech-lists@zyxst.net> Cc: freebsd-arm@freebsd.org Subject: Re: RPi 4 build time Message-ID: <DA22CB96-82BE-4AAB-BB94-500E4B1AB1BB@yahoo.com> In-Reply-To: <YKmuk97mO2trodFp@ceres.zyxst.net> References: <YKgTB7Hf3dkQiW5c@vax.khramtsov.org> <YKgzeLxxZNhViwoi@ceres.zyxst.net> <0299DFBF-5497-4A06-978D-13E4FBD8B5F0@yahoo.com> <YKkqxrthZoHg87wV@ceres.zyxst.net> <DB0011CC-3F99-4E34-B5DF-307AD707851A@yahoo.com> <9A949E36-FDF2-40B3-A126-5538E41964D3@yahoo.com> <YKmuk97mO2trodFp@ceres.zyxst.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2021-May-22, at 18:23, tech-lists <tech-lists at zyxst.net> wrote: > On Sat, May 22, 2021 at 04:51:31PM -0700, Mark Millard via freebsd-arm = wrote: >=20 >> In general these figures are approximations of the low >> bound on a buildworld that is a (near) no-op but is >> not frequently approached in my normal activity. But >> it is rare for me to update the source tree again >> and rebuild after only a few source commits after >> what was originally rebuilt. For such, sub-half hour >> rebuilds can certainly occur via META_MODE use. >>=20 >> The context happened to be the ZFS based one in all >> cases. Still no ccache use. >=20 > That's wild. I have to look at meta mode.=20 > My use case though mostly involves building/updating ports with > poudriere, and I'm happy it can use ccache. >=20 > Am I right in thinking meta mode is a buildworld/kernel thing only? = I've > only heard of it; I know nothing about it. Yep: buildworld buildkernel only. META_MODE does not help for after a "rm -rf /usr/obj/*" sort of clean-out. It just attempts to avoid rebuilding materials already present that are sufficient. (It still builds more than is strictly necessary: Some of the dependency tracking tracks things that do not actually imply needing a file rebuild. This is why installworld to the live system ends up leading to a larger rebuild later.) =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?DA22CB96-82BE-4AAB-BB94-500E4B1AB1BB>