Date: Fri, 9 Mar 2018 15:24:44 -0800 From: bob prohaska <fbsd@www.zefox.net> To: "Michael Mitchell (megabyte)" <mmitchel@gmail.com> Cc: Ian Lepore <ian@freebsd.org>, freebsd-arm@freebsd.org, bob prohaska <fbsd@www.zefox.net> Subject: Re: Garbled console output on Pi3 Message-ID: <20180309232444.GB65874@www.zefox.net> In-Reply-To: <1F29E846-6EFE-4966-85BC-742F0B59B774@gmail.com> References: <20180307182117.GA55819@www.zefox.net> <1520628270.84937.56.camel@freebsd.org> <1F29E846-6EFE-4966-85BC-742F0B59B774@gmail.com>
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On Fri, Mar 09, 2018 at 01:05:27PM -0800, Michael Mitchell (megabyte) wrote:
> This happens to me when the cable FTDI USB/232TTL isn't seated very well. Pin header connectors do have
> a limited cycle count, and become loose over time. The first thing I always blame is the cable...
>
> Michael Mitchell
>
I tried switching usb-serial adapters, in this case going from pl2303 to
ftdi-232. Didn't make any difference. On connection, the console output
looks fine. When I started up stress2 (as a regular, unpriviledged user)
the console started putting out
Mar 9 15:18:31 www kernel: ecsmedn tt hsrc2h epdid_ yi8e8l1d9
Mar 9 15:18:31 www kernel: <3t>crmide d tthor 2u spei dn oi8d8 n1-9898 1pt9r9r iterdi etdo tuessee nnto n-spcrheesde_nyti eslcdh
Mar 9 15:18:31 www kernel: d_ycimedl dt
Mar 9 15:18:31 www kernel: r2c mpdi dt hr828 1p9i9d tr8i8e1d9 9ot tursoiee dnu ostneo- unsoen -nporne-spernets enstc hsecdh_eydi_eylide
Mar 9 15:18:31 www kernel: d
Mar 9 15:18:31 www kernel: mdc mtdh rt2h rp2i dp id8 81898199 9t rtireide dt ot ou sues en onno-np-rperseesnetn tpsrce sheends_tyci ehlesddc_
Mar 9 15:18:31 www kernel: ield
In this particular case, the other four ssh sessions began to exhibit
snippets of scrambled out put also, for example
Message from syslogd@www at Mar 9 15:18:31 ...
www kernel: rc2m d
and
last pid: 89780; load averages: 16.42, 43.26, 23.613 up 0+21:25:33 15:21:17
45 processes: 1 running, 40 sleeping, 4 zombie
CPU: 0.0% user, 0.0% nice, 1.3% system, 5.7% interrupt, 93.0% idle
Mem: 13M Active, 2868K Inact, 105M Wired, 12M Buf, 788M Free
Swap: 4096M Total, 34M Used, 4062M Free
Message from syslogd@www at Mar 9 15:18:31 ...ATE C TIME WCPU COMMAND
88255 bob : rc2m d0c18d20tthr2 11128K 296K ufs 2 0:00 0.48% dirrename
88248 bob ldd_ 1 20 0 11128K 296K ufs 1 0:00 0.47% dirrename
88253 bob 1 20 0 11128K 292K ufs 1 0:00 0.45% dirrename
88254 bob 1 20 0 11128K 292K biowr 1 0:00 0.45% dirrename
88256 bob 1 20 0 11128K 296K ufs 3 0:00 0.43% dirrename
88249 bob 1 20 0 11128K 292K ufs 1 0:00 0.42% dirrename
88252 bob 1 20 0 11128K 292K ufs 1 0:00 0.41% dirrename
also
bob@www:/usr/src %
Message from syslogd@www at Mar 9 15:16:06 ...
www kernel: 38 8t2r0i0e dt rtioe du stedo nutoshner- 2pn ropeisde nn8t8 2-2psr3c hetesrdeinetd _ sytciohe eldd_
Message from syslogd@www at Mar 9 15:18:29 ...
www kernel: 83s2>c0cm8d tthr2 pidd t8o8 us208e tnroine-dp rteos eunhseetd nsocnh-epdr_eysieenltdr
Message from syslogd@www at Mar 9 15:18:31 ...
www kernel: rc2m d
and finally, in the session where stress2 was running
15:15:20 Loop #1
rw: run time 0+00:02:00, incarnations 8, load 70, verbose 1
swap: run time 0+00:02:00, incarnations 30, load 80, verbose 1
symlink: run time 0+00:02:00, incarnations 11, load 20, verbose 1
thr2: run time 0+00:02:00, incarnations 13, load 20, verbose 1
creat: run time 0+00:02:00, incarnations 9, load 80, verbose 1
dirrename: run time 0+00:02:00, incarnations 9, load 20, verbose 1
Message from syslogd@www at Mar 9 15:16:06 ...
www kernel: 38 8t2r0i0e dt rtioe du stedo nutoshner- 2pn ropeisde nn8t8 2-2psr3c hetesrdeinetd _ sytciohe eldd_
Message from syslogd@www at Mar 9 15:18:29 ...
www kernel: 83s2>c0cm8d tthr2 pidd t8o8 us208e tnroine-dp rteos eunhseetd nsocnh-epdr_eysieenltdr
Message from syslogd@www at Mar 9 15:18:31 ...
www kernel: rc2m d
20180309 15:21:32 creat.cfg, elapsed 00:06:14
Note: all.sh in stress2/misc is the preferred test to run.
run: run time 0+00:05:00, incarnations 1, load 100, verbose 1
15:21:32 Loop #1
creat: run time 0+00:02:00, incarnations 5, load 100, verbose 1
So, I don't think it's the usb-serial adapter....
Thanks for reading!
bob prohaska
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