Date: Sat, 1 Sep 2018 16:02:33 -0700 From: bob prohaska <fbsd@www.zefox.net> To: freebsd-arm@freebsd.org Subject: Re: RPI3 swap experiments (r338342 with vm.pageout_oom_seq="1024") Message-ID: <20180901230233.GA42895@www.zefox.net> In-Reply-To: <20180815225504.GB59074@www.zefox.net> References: <20180813021226.GA46750@www.zefox.net> <0D8B9A29-DD95-4FA3-8F7D-4B85A3BB54D7@yahoo.com> <FC0798A1-C805-4096-9EB1-15E3F854F729@yahoo.com> <20180813185350.GA47132@www.zefox.net> <FA3B8541-73E0-4796-B2AB-D55CE40B9654@yahoo.com> <20180814014226.GA50013@www.zefox.net> <CANCZdfqFKY3Woa%2B9pVS5hika_JUAUCxAvLznSS4gaLq2kKoWtQ@mail.gmail.com> <20180815013612.GB51051@www.zefox.net> <CANCZdfoB_AcidFpKT_ZmZWUFnmC4Bw55krK%2BMqEmmj=f9KMQ2Q@mail.gmail.com> <20180815225504.GB59074@www.zefox.net>
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On Wed, Aug 15, 2018 at 03:55:04PM -0700, bob prohaska wrote: > > When I started this goose chase, after zero problems with RPI2, I thought the > issue was arm64-related and might be of some fundamental importance. > > Thanks to many people I now understand it's a confluence of USB and flash memory > artifacts, made evident by the demands of clang6. Elsewhere I noted that I'm seeking > "the robustness of a Mars rover, using a rack server OS on a cellphone motherboard". > With r338342 and vm.pageout_oom_seq="1024" in /boot/loader.conf the RPI3 is a bit closer to a Mars Rover. No panics, crashes or USB errors, -j4 buildworld runs to completion. When swap usage goes over about 50% the system slows, but doesn't give up. There are six 1 GB swap partitions available, 3 on USB and 3 on microSD. Log files are at http://www.zefox.net/~fbsd/rpi3/swaptests/r338342/ for the combinations tried so far. Thanks for reading, and everybody's help! bob prohaska
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