Messages in this thread |  | | Date | Thu, 14 Sep 2000 14:23:43 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: Terrible elevator performance in kernel 2.4.0-test8 |
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On Thu, 14 Sep 2000, Andrea Arcangeli wrote: > On Thu, Sep 14, 2000 at 07:40:12PM +1000, Robert Cohen wrote: > > > With kernel version 2.4.0-test1-ac22, I saw adequate performance. > > In 2.4.0-test1-ac22 there were a latency-driven elevator (the > one we have now since test2 can't provide good latency anymore). > > So if something it should be the other way around, the elevator > that we have since test2 should provide _better_ throghput and > _less_ seeks. Thus it can't be the elevator algorithm but maybe > as Ingo said something in the plugging that broke during the > test2 changes.
Indeed you're right. The elevator /shouldn't/ be the source of all these problems. Under very heavy (but regular) IO loads I'm not seeing the stalls I experience under lighter IO loads ...
That is bound to be a problem with unplugging.
regards,
Rik -- "What you're running that piece of shit Gnome?!?!" -- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
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