Date: Fri, 21 May 2021 15:13:01 -0700 From: Mark Millard via freebsd-arm <freebsd-arm@freebsd.org> To: evgeniy@khramtsov.org Cc: freebsd-arm@freebsd.org Subject: Re: RPi 4 build time Message-ID: <15C28068-AE5F-49C4-A0E3-5E02622F8790@yahoo.com> In-Reply-To: <YKgp6aGuu/jGYJ/D@vax.khramtsov.org> References: <YKgTB7Hf3dkQiW5c@vax.khramtsov.org> <YKgp6aGuu/jGYJ/D@vax.khramtsov.org>
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On 2021-May-21, at 14:45, Evgeniy Khramtsov via freebsd-arm <freebsd-arm = at freebsd.org> 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)
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