lkml.org 
[lkml]   [1996]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: 2.0.6 Networking strangeness
From
   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


\
 
 \ /
  Last update: 2005-03-22 13:38    [W:0.203 / U:0.432 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site