Messages in this thread | | | Date | Tue, 16 Apr 2002 13:40:49 -0300 (BRT) | From | Rik van Riel <> | Subject | Re: IO performance problems in 2.4.19-pre5 when writing to DVD-RAM/ZIP/MO |
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On Tue, 16 Apr 2002, Alan Cox wrote:
> > > benchmarks 1-4, kernel 2.4.19-pre5 performed much worse than > > > 2.4.18. The reason may be that the main throughput stems from the > > > short moments where, for what reason whatsoever, read speed increases > > Fairness, throughput, latency - pick any two..
Personally I try to go for fairness and latency in -rmap, since most real workloads I've encountered don't seem to have throughput problems.
The standard "it's getting slow" complaint has been about response time and fairness 90% of the time, usually when the system stalls one process during some other activity.
> > Right fix is different but not suitable for 2.4. > > Curious - what do you think the right fix is ?
Tuning the current system for latency and fairness should keep most people happy. Desktop users really won't notice if unpacking an RPM takes 20% longer, but having their mp3 skip during RPM unpacking is generally considered unacceptable.
regards,
Rik -- http://www.linuxsymposium.org/2002/ "You're one of those condescending OLS attendants" "Here's a nickle kid. Go buy yourself a real t-shirt"
http://www.surriel.com/ http://distro.conectiva.com/
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