Date: Wed, 14 Aug 2013 09:48:12 +0200 From: Krister Olofsson <krister.olofsson@gmail.com> To: freebsd-arm@freebsd.org Subject: Re: System freezes when using scp Message-ID: <CAAY5Z-ObsxnOkG=hUYe6gap=pgmxQxXpYkWtrsWd76vtU%2Bf=Vg@mail.gmail.com> In-Reply-To: <1375976603.3320.147.camel@revolution.hippie.lan> References: <CAAY5Z-M%2BS1VhNBerTOjnTSisa1n-DgD-gTsymSTayZ-QosMMzA@mail.gmail.com> <1375967077.3320.117.camel@revolution.hippie.lan> <CAAY5Z-OtcrhEJMOboTVvj6VwWfkFg=nGRmnor1FgTZAL_QcbNQ@mail.gmail.com> <1375976603.3320.147.camel@revolution.hippie.lan>
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The patch causes the system to hang during boot. The last line printed is 'Entropy harvesting: interrupts ethernet point_to_point' and Ctrl-c does not help. Regards, Krister 2013/8/8 Ian Lepore <ian@freebsd.org> > Try the attached patch -- I need it to run 8.2 on a Kirkwood chip, maybe > the same thing is needed on Discovery chips. One of the things it fixes > for me is data corruption on big network and sata transfers, so maybe > it's related to the problem you're seeing. > > -- Ian > > On Thu, 2013-08-08 at 16:42 +0200, Krister Olofsson wrote: > > Hi, > > > > I don't notice any pause if I ssh to it. (The pause using scp is ca 3 > > seconds) > > I've tested netcast and there is no problem if I send the output to > > /dev/null > > but the system reboots if I send it to a file. > > I've also tested to copy the file using nfs and there is no problem with > > that. > > > > Running 'cat file' (file size ca 50 Mb) sometimes causes the problem > after > > ca 10 s, but not always. > > If I do ssh to a third machine and run 'cat file' the problem always > occurs > > at once > > > > Regards, > > Krister > > > > > > 2013/8/8 Ian Lepore <ian@freebsd.org> > > > > > On Thu, 2013-08-08 at 13:44 +0200, Krister Olofsson wrote: > > > > Hi, > > > > > > > > I'm working with a board with FreeBSD 8.2 on Marvell MV78100 > (Discovery > > > > SOC) - an ARMv5TE and Marvell Gigabit Ethernet controller. > > > > My problem is that when I copy files (size ca 50 Mb) with scp using > > > > ethernet, the system > > > > seems to freeze for a few seconds before the copy process starts. > > > > The board has an external watchdog that has to be kicked but the > script > > > > doing this freezes and the system is rebooted by the watchdog. > > > > > > > > Any ideas how to tackle this? > > > > > > > > Regards, > > > > Krister > > > > > > > > Configuration: > > > > > > > > # > > > > # Custom kernel for PROJ, based on Marvell's DB-78xx > > > > # > > > > [...] > > > > > > Do you get the same kind of pause interactively ssh'ing to it? When > you > > > say "a few seconds" what do you mean? 3 seconds? 8? 30? > > > > > > I think a good first step is to figure out whether the problem is > > > related to ssh, or network IO, or disk IO. You can take ssh out of the > > > picture by using netcat to test, something like: > > > > > > On the arm: nc -l 8000 >/output/file > > > On the sender: nc <ip of arm> 8000 </input/file > > > > > > If you send the output to /dev/null on the arm you're just testing the > > > network part. > > > > > > In my experience, a long pause at the start of an ssh session followed > > > by normal performance after that is what you get when a wimpy arm chip > > > with software floating point generates the session keys. But that's > > > based on experience with a 180mhz armv4 chip. I've never noticed that > > > sort of slowness on my DreamPlug (1.2ghz Marvell Kirkwood chips). > > > > > > -- Ian > > > > > > > > > > > _______________________________________________ > > freebsd-arm@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" > >
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