Date: Wed, 31 May 2000 15:04:57 +0530 (IST) From: "G.B.Naidu" <gbnaidu@sasi.com> To: Soren Schmidt <sos@freebsd.dk> Cc: freebsd-net@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: system hangs... (fwd) Message-ID: <Pine.LNX.4.21.0005311502520.761-100000@pcd75.sasi.com> In-Reply-To: <200005310759.JAA91324@freebsd.dk>
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Hi Soren, Thanks a lot for the help. CTRL+ALT+ESC works. Thanks once again. Now we can do some analysis. regards --gb On Wed, 31 May 2000, Soren Schmidt wrote: > It seems G.B.Naidu wrote: > >=20 > > I have posted this earlier. I didnt get any reply about system hangs. > > Please some body help me out to track down these hangs. Questions are > > below. >=20 > Have you tried putting DDB into the kernel, and tried to > hit ALT+CTRL+ESC to go into the debugger on the hang ? >=20 > Printf is a good tool here, sprinkle your source with > printf's so you can see how far you get, and what=20 > essential values are getting used. >=20 > Another possibility is to attach 8 LED's to a printer > port, those you can then turn on/off at will by a simple > outb statement. I use a 2*40 char LCD display connected > this way sometimes, that gives me a history of 80 values, > so I can se the exact sequence of events that let me to=20 > the problem at hand.. >=20 > -S=F8ren >=20 --=20 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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