Date: Tue, 21 Nov 2017 13:15:05 -0800 From: Mark Millard <markmi@dsl-only.net> To: bob prohaska <fbsd@www.zefox.net>, Freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: ssh sessions close spontaneously on rpi2 Message-ID: <FB9B37A4-CD5B-45F7-85A5-9AF1E6174F86@dsl-only.net> In-Reply-To: <20171120165832.GA55836@www.zefox.net> References: <20171118165638.GA47956@www.zefox.net> <20171120165832.GA55836@www.zefox.net>
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On 2017-Nov-20, at 8:58 AM, bob prohaska <fbsd@www.zefox.net> wrote: > Can anybody reproduce the following behavior on RPI2 ? >=20 > Boot the machine multi-user and start two ssh login sessions. >=20 > On one, start a top session, as a placeholder. On the second, > su to root, cd to /usr/ports and run > make -j8 clean > clean.log & >=20 > Next, try to open another (this makes three) ssh connection. Log in, > and just watch.=20 >=20 > On my test box at FreeBSD 12.0-CURRENT (RPI2) #10 r325987 the = connection > fails within a couple of minutes; the login session terminates without > explanation and the connection closes.=20 >=20 > No errors are on the serial console, /var/log/messages records nothing > related. Ssh sessions started prior to starting make clean seem = unaffected. Given the messages that I've been getting but you have not, I figure my attempting this under my current conditions would not be effective. But I've another oddity that you might try: A) I booted and ran top on the serial console ( top -CaePosize ) B) I logged in 4 ssh sessions and had each do "openssl speed" top gets an unexpected result: CPU 2 shows as 100% idle and the others 0.0% idle. The process CPU column agrees, in that that the total is around 300% instead of around 400%. A couple of the tend to show closer to 50% as long as 4 are running. At 3 running it goes back to each being near 100%. # uname -apKU FreeBSD rpi2 12.0-CURRENT FreeBSD 12.0-CURRENT r325700M arm armv7 = 1200053 1200053 (I normally run a non-debug kernel that has debug symbols.) I may try jumping to -r325997 . =3D=3D=3D Mark Millard markmi at dsl-only.net
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