Date: Sat, 20 Mar 2021 08:56:38 -0700 From: bob prohaska <fbsd@www.zefox.net> To: Klaus K??chemann <maciphone2@googlemail.com> Cc: freebsd-arm@freebsd.org, Mark Millard <marklmi@yahoo.com>, bob prohaska <fbsd@www.zefox.net> Subject: Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel ) Message-ID: <20210320155638.GA41617@www.zefox.net> In-Reply-To: <81CB0CCA-59AC-49A2-9372-4E2C22E3214D@googlemail.com> References: <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> <FA5A110A-4E7A-4381-BBE5-9B3022CA9008@googlemail.com> <20210319195019.GA39087@www.zefox.net> <FDBC2E89-8473-4C3A-B12E-78821949FDDB@yahoo.com> <20210320005302.GA40542@www.zefox.net> <81CB0CCA-59AC-49A2-9372-4E2C22E3214D@googlemail.com>
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On Sat, Mar 20, 2021 at 03:44:06AM +0100, Klaus K??chemann wrote: > > as Mark said, powerd isn???t enabled by default in releases , so the freq is @600 by default. At the time I'm thinking about it would have been -current, most likely. I knew of powerd's existence, but never thought to use it until you bought the idea up. > So 17 hours @4x600 . > with powerd enabled you should have automatically exactly 4x1500 during the complete compilation time. The most recent test on the 8GB Pi4 finished in 9 hours. That was after running make cleandir twice, but having the installed system and the sources relatively close (days) in age, on -current. That's with powerd enabled, but no other speedup tweaks. Temps were just under 60 C, with a fan in the case but no heatsinks on the ICs. > sysctl dev.cpu.0.freq will definitely show the current freq. On a Pi3 with GENERIC-MMCCAM kernel (also running buildworld) it reports bob@www:/usr/freebsd-src % sysctl dev.cpu.0.freq dev.cpu.0.freq: 1200 also with no other speedup efforts beyond powerd. That machine has heastinks on the ICs but only a fan blowing in through the openings in the plastic case. It's around 60C. So far the effects of powerd seems to be uniformly good, with no downsides. Next, to try a Pi2 v1.1 (armv7) Thanks for mentioning powerd, it never crossed my mind. bob prohaska
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