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Sun, 23 May 2021 01:36:46 +0000 Received: by kubenode570.mail-prod1.omega.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 6253f60a58afd2e93d882a89748de4ab; Sun, 23 May 2021 01:36:44 +0000 (UTC) Content-Type: text/plain; charset=us-ascii List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.80.0.2.43\)) Subject: Re: RPi 4 build time In-Reply-To: Date: Sat, 22 May 2021 18:36:43 -0700 Cc: freebsd-arm@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <0299DFBF-5497-4A06-978D-13E4FBD8B5F0@yahoo.com> <9A949E36-FDF2-40B3-A126-5538E41964D3@yahoo.com> To: tech-lists X-Mailer: Apple Mail (2.3654.80.0.2.43) X-Rspamd-Queue-Id: 4Fnjcc1FNWz3CxD X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] Reply-To: marklmi@yahoo.com From: Mark Millard via freebsd-arm X-Original-From: Mark Millard On 2021-May-22, at 18:23, tech-lists 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)