Date: Sun, 10 Jan 1999 23:54:10 -0800 From: Mike Smith <mike@smith.net.au> To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Cc: mjacob@feral.com, Mike Smith <mike@smith.net.au>, alpha@FreeBSD.ORG Subject: Re: complete lockup under large I/O? Message-ID: <199901110754.XAA87534@dingo.cdrom.com> In-Reply-To: Your message of "Mon, 11 Jan 1999 16:49:50 %2B0900." <19990111164950Z.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. Is there one waiting in 'ffsvget'? If so, we've seen this on a system here was well. Luoqi and Tor seem to have some ideas on resolving it. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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