lkml.org 
[lkml]   [2004]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: xterm scrolling speed - scheduling weirdness in 2.6 ?!
From
Date
On Mon, 05 Jan 2004 00:33:12 +0100, Willy Tarreau said:

> at a time. I have yet to understand why 'ls|cat' behaves
> differently, but fortunately it works and it has already saved

I suspect that ls and cat do different buffering to their outputs, and/or the
fact there's now 4 processes (ls, cat, xterm, Xserver) rather than just 3. End
result is that things wake up in a different order and happen to schedule
better. (For instance, ls may be able to make progress while cat is blocked
waiting for the xterm to read the next block, etc). I remember at least some
versions of 'dd' would fork off a sub-process so there would be a reader side
and a writer side with a shared memory buffer, for just that reason.

[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2005-03-22 13:59    [from the cache]
©2003-2011 Jasper Spaans