Messages in this thread |  | | Date | Mon, 15 Jul 1996 16:44:03 -0700 | Subject | Re: 2.0.6 Networking strangeness | From | tytso@mit ... |
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Date: Sun, 14 Jul 1996 13:37:22 +0300 (EET DST) From: Linus Torvalds <torvalds@cs.helsinki.fi>
However, this behaviour makes me suspect more and more that there is something broken in the PPP (or serial code) timings,
Well, there is a known problem in the tty layer, which is that upper layer processing doesn't happen except on the next clock tick. Hence, there is on average a .005 second delay between when the PPP framing character comes in and when it actually gets processed.
I've considered putting in a PPP specific hack where when the serial layer sees the PPP framing character, it immediately forces the serial processing to happen as soon as the interrupt returns (as a bottom half routine). It's been a layering violation, though, so I wouldn't really want to do this unless someone can show that it would really make a big difference.
- Ted
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