Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel )
Mark Millard via freebsd-arm <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On 2021-Mar-18, at 13:01, Mark Millard <marklmi at yahoo.com> wrote: > On 2021-Mar-18, at 12:05, Mark Millard <[email protected]> wrote: > >> . . . > > I've not done temperate testing in a > while. One quick report I can make > is that for my "always cpu_freq 2000 > always sdram_freq 3200" contexts > with the RPI4B only doing whatever > background tasks are involved in > being basically idle but having > the heatsinks and active cooling > (fans): > > # sysctl -a | grep temper > hw.cpufreq.temperature: 35012 > dev.cpu.0.temperature: 35.0C > > in a currently 15.5C or so ambient > context is rather typical. > So I started up a from-scratch "rebuild self" -j buildworld buildkernel via an ssh over Ethernet session. (This may minimize interrupt overhead vs. the output text scrolling the serial console?) 30+ minutes into the build: I'm seeing figures like (the high so far): hw.cpufreq.temperature: 49137 dev.cpu.0.temperature: 49.1C (Such pairs give some idea of the fairly short term variability.) I'm only bothering to look once a minute or so: # while (true); do sleep 60 ; sysctl hw.cpufreq.temperature dev.cpu.0.temperature ; done So far the widest fairly-short-term variation was in: hw.cpufreq.temperature: 45727 dev.cpu.0.temperature: 45.6C FYI: The build reported: make[1]: "/usr/fbsd/mm-src/Makefile.inc1" line 339: SYSTEM_COMPILER: Determined that CC=cc matches the source tree. Not bootstrapping a cross-compiler. make[1]: "/usr/fbsd/mm-src/Makefile.inc1" line 344: SYSTEM_LINKER: Determined that LD=ld matches the source tree. Not bootstrapping a cross-linker. Later I'll report the maximum(s) observed. But it will be a few hours for the build to complete. === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar) _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"