Date: Tue, 23 Mar 2021 17:08:35 -0700 From: bob prohaska <fbsd@www.zefox.net> To: Mark Millard <marklmi@yahoo.com> Cc: freebsd-arm <freebsd-arm@freebsd.org>, bob prohaska <fbsd@www.zefox.net> Subject: Re: RPi and powerd, was: Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel ) Message-ID: <20210324000833.GA79438@www.zefox.net> In-Reply-To: <1BBF6487-227A-428B-9B23-539AC8AB7661@yahoo.com> References: <FDBC2E89-8473-4C3A-B12E-78821949FDDB@yahoo.com> <20210320005302.GA40542@www.zefox.net> <81CB0CCA-59AC-49A2-9372-4E2C22E3214D@googlemail.com> <20210320155638.GA41617@www.zefox.net> <63E61033-667C-4A08-9012-7D987B652176@yahoo.com> <20210320182821.GA49050@www.zefox.net> <AD8A445A-DF90-4525-8042-EA2A667558FE@yahoo.com> <5BF4DC26-8CCC-48E8-802F-34C42084D47F@yahoo.com> <20210321181339.GA56351@www.zefox.net> <1BBF6487-227A-428B-9B23-539AC8AB7661@yahoo.com>
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On Tue, Mar 23, 2021 at 02:38:25PM -0700, Mark Millard wrote: > [This did not get sent when I wrote it. So sending way late.] > > On 2021-Mar-21, at 11:13, bob prohaska <fbsd at www.zefox.net> wrote: > > > On Sat, Mar 20, 2021 at 09:20:36PM -0700, Mark Millard wrote: > >> > >> You are getting the vast majority of the time > >> benefit from powerd use compared to my build > >> context (based on the world build times). Avoiding > >> building to allow compiling non-arm could cut > >> your time noticeably, possibly around 30 minutes > >> for world. > >> > > > > Half an hour I can wait 8-) More likely I'll botch the changes. > > > > After trying powerd on the Pi4 with success it was applied > > to Pi3 and Pi2. Powerd seemed to work well on the Pi3, but > > > > the Pi2 v1.1 stalled consistently in the building libraries > > phase. The stall was unresponsive to the debugger escape. > > After power-cycling and disabling powerd, the Pi2 picked > > up where it left off. Not sure if this is a property of > > powerd or an artifact of my setup on the Pi2, being > > 14.0-CURRENT FreeBSD 14.0-CURRENT #13 main-f5e930b369: > > executing > > make -j4 -DWITH_META_MODE buildworld > That problem seems to have gone away, at least for now. Once the system updated it seemed to run buildworld successfully with powerd turned on. > It might be that if you set the speed in /etc/sysctl.conf > instead of using powerd (so the arm running at a constant > rate), that the problem would repeat on the RPi2. > That sounds like it might help distinguish between a problem with my setup and a problem with powerd. If both sysctl acceleration and powerd acceleration cause a hang, it isn't powerd's fault. > Were you monitoring temperature on the RPi2? Voltage? > Temperature, casually, 55-60C, room below 20C. Voltage, not at all. Stick-on heat sinks but no fan. I'll simply leave powerd enabled and wait to see if the trouble comes back. Thanks for writing! bob prohaska
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