Messages in this thread | | | Subject | Re: xterm scrolling speed - scheduling weirdness in 2.6 ?! | From | Valdis.Kletnieks@vt ... | Date | Sun, 04 Jan 2004 18:44:23 -0500 |
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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.
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