Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel )
bob prohaska <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
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 _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"