From owner-freebsd-alpha  Sun Jan 10 23:51:59 1999
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To: mjacob@feral.com
Cc: Mike Smith <mike@smith.net.au>, alpha@FreeBSD.ORG
Subject: Re: complete lockup under large I/O?
In-Reply-To: Your message of "Sun, 10 Jan 1999 23:37:38 -0800 (PST)"
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Date: Mon, 11 Jan 1999 16:49:50 +0900
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
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mjacob> I'll try, but last I heard BRK didn't work on serial lines.

Did you add "options BREAK_TO_DEBUGGER" to config file?
It works mostly for me.

mjacob> On Sun, 10 Jan 1999, Mike Smith wrote:
mjacob> 
mjacob> > > 
mjacob> > > I have a test script/program that repeatedly reads
mjacob> > > or writes a same spot on a device using progressively
mjacob> > > larger blocksizes.
mjacob> > > 
mjacob> > > I was using 3 8GB disks ccd'd together on a AlphaPC164 and the
mjacob> > > the system completely froze when it went about 1MB blocksizes.
mjacob> > > 
mjacob> > > Anyone have a notion about this?
mjacob> > 
mjacob> > You may be seeing a deadlock on resource starvation; it'd be really 
mjacob> > interesting to see the output of 'ps' if you can get into DDB.

I sometimes have similar problem.
In such case, ps shows many process are waiting at vmpfw or ppwait state.

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp

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