Date: Fri, 19 Mar 2021 18:55:17 +0000 From: tech-lists <tech-lists@zyxst.net> To: freebsd-arm@freebsd.org Subject: Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel ) Message-ID: <YFTzlVVhyt13wdAG@ceres.zyxst.net> In-Reply-To: <AD2BCC4D-F0A2-40F6-ABB8-2F5B08ED47D4@yahoo.com> References: <20210318170053.GA26688@www.zefox.net> <9FFA0A51-C0B7-4121-95CA-B98669809007@yahoo.com> <E4CF6642-CB70-4495-A865-05469953561C@yahoo.com> <EA6BE351-98F5-4446-BA4D-948F04EDFD3B@yahoo.com> <81AC0353-258C-41C3-86B1-C133E33D97E3@yahoo.com> <20210319174359.GA38899@www.zefox.net> <9DB699E3-5977-4651-B3D2-26343F202F2D@yahoo.com> <AD2BCC4D-F0A2-40F6-ABB8-2F5B08ED47D4@yahoo.com>
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--eiKcLqcwgngKKgve Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Mar 19, 2021 at 11:29:51AM -0700, Mark Millard via freebsd-arm wrot= e: >Back to temperature. See: > >https://www.raspberrypi.org/documentation/hardware/raspberrypi/frequency-m= anagement.md > >It indicates that 85C is the maximum temperature, >though lower figures can be set. It also reports >that a form of throttling starts at 80C by default. I use -j6 [1] for buildworld/kernel steps on stable/13 and highest temp see= n has=20 been 72 degC at 25 ambient [2], when it's compiling clang and friends. Not = measured timings but it's less than a day. I'll have to try the .clang flags you've posted elsewhere. What I do have, which cuts down compile time, is a load of WITHOUT_SOMETHING=3D statements in /etc/src.conf covering stuf= f that'll never be used in this particular context. [1] still has enough horsepower to run eg mutt+vim and a nginx webserver co= mfortably.=20 I didn't choose -j6 out of anything more scientific than "well there's= 4 cores so=20 let's make it j6 to keep it busy" [2] implying maximum ambient is 33 for this case. --=20 J. --eiKcLqcwgngKKgve Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE8n3tWhxW11Ccvv9/s8o7QhFzNAUFAmBU840ACgkQs8o7QhFz NAWEUhAArYFUVoADzQoYcSPQ91EkdUNenPlb0gGYczE3aGQW5ywfSy+F37LCCSeO BGrNkCAwGR0cYOB+4OgNRxEw5rPjwHqI01O21YG1a86S7VrL1TGIinBni4f7BOrZ 8ZR3NBQmyvzKBw8TU/9mEZ7TcelJxQZmSzwxHqSgpo8XUUMif5cTyEjCwKW8ZjhT v56Y9GiPmUR5NHS19Enfa6Uqe5GByfozSAincV9A9+hSSV65X1/vnDJQ9UpgfXsj voK1TJWz5sCsZhchhJqTWk7hEGVpXFCgmhZPFay2i1mR89KYlwu1E+n/djqFrimj eabUhSqeBQbTZflpUdxNJePLQKKutslBvr3ls22YSk5tdP5t2I9SlycYTaoKAN5h 65QDfHnPhY3JyX3j6r6o3AniMafYmIkwHVJV/itvXF+K8RvGF0OQBkOYYyk74cUO 6ZoSMUqA/DEvNTIrStWGokE6ElYkUIx/i/KS+ZJ2MII1jUC2Olhd16tWPV1R/jHR AZl4zbxAV9OEUdxpeQwGTej0+HNf6nwbdZuVvA1RZF6pwkkqVndG2MLPYHvBjoNv Nk8wMT9FAa7OHdxGig9cFV8vjaSbbDvLsEMynC2/RnbwZZrFNZFYej+HDcb0J/hP IhVTrb/ttNLaZ6MAGrE/I4WFaqZIRyFxZNSTtQY8Kktnz++M3a8= =WJiG -----END PGP SIGNATURE----- --eiKcLqcwgngKKgve--
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