Messages in this thread | | | Date | Thu, 24 Jul 1997 00:06:25 +0200 | From | Andries.Brouwer@cwi ... | Subject | Re: 2.0.30 serial.c, ppp.c and pppd-2.2 questions |
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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 my SLIP connection is completely unusable when something disk-intensive is running. FTP gets into an exponential backoff and seems to hang completely, but recovers some time after the make/find/whatever has finished.
[This happens both with IDE and SCSI activity. I never really investigated.]
Andries
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