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Fri, 21 May 2021 22:13:05 +0000 Received: by kubenode559.mail-prod1.omega.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 087ef06073910fcc05bb584646ec6aec; Fri, 21 May 2021 22:13:01 +0000 (UTC) Content-Type: text/plain; charset=us-ascii List-Id: Porting FreeBSD to ARM processors List-Archive: http://lists.freebsd.org/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: Fri, 21 May 2021 15:13:01 -0700 Cc: freebsd-arm@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <15C28068-AE5F-49C4-A0E3-5E02622F8790@yahoo.com> References: To: evgeniy@khramtsov.org X-Mailer: Apple Mail (2.3654.80.0.2.43) X-Rspamd-Queue-Id: 4Fn18310Q7z4tG6 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-21, at 14:45, Evgeniy Khramtsov via freebsd-arm wrote: >> World built in 22491 seconds, ncpu: 4, make -j4 >> 6 hours 45 minutes >=20 > This is impressing considering that one old Athlon 64 space heater = took more > than 9 hours to build FreeBSD 12 in 2017 when CC=3Dcc, LD=3Dld matched = the src tree. >=20 I probably should have noted that to use: arm_freq=3D2000 sdram_freq_min=3D3200 force_turbo=3D1 reliably, I also use: over_voltage=3D6 (I've not tried to identify the minimum, just a sufficient figure.) I'll also note that: = https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-co= des/README.md documents in its note 2 that: "Warranty bit is never set on Pi4." So, even more extreme combinations of force_turbo=3D1 and over_voltage would not invalidate the warranty. The 7 or so RPi4B's that I've had access to (four 8 GiByte, the rest 4 GiByte) all worked well with the combination indicated. I've not tried to optimize to individual machine limits. =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)