Messages in this thread | | | Subject | Re: 2.0.30 serial.c, ppp.c and pppd-2.2 questions | Date | Thu, 24 Jul 1997 09:13:02 +0200 (MET DST) | From | (Rogier Wolff) |
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Andries.Brouwer@cwi.nl wrote: > > Theodore Y. Ts'o: > > : Date: Wed, 23 Jul 1997 08:07:23 +0200 (MET DST) > : From: R.E.Wolff@BitWizard.nl (Rogier Wolff) > > : Yes, I agree. At 38k4 you need 130 ms to fill the flip buffer. And if > : you see this kind of delays there is something "wrong". An easy > : solution like increasing the buffer size may delay the fenomenon to > : the point that it is hard to reproduce, but we haven't really fixed > : anything. In some cases not receiving any chars for 130 ms can be > : annoying too.... > > : And at 115kbaud you need 44ms to fill the flip buffer. So you'd have to > : miss 4 clock ticks before the flip buffer would be overflowing. I can > : believe we're missing 1, or maybe even 2, but 4? > > Possibly entirely unrelated (you are talking about missed timer interrupts, > probably I am talking about missed serial line interrupts) but
Andries, Are you seeing messages mentioning the flip buffer?
Some time ago, I was still running xntpd on my router, and back then I was pretty sure that no actual (timer) interrupts were lost. A 10 ms jump would show up in the xntp graphs that I would make occasionally back then.
Roger.
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