Re: 2.6.12 Performance problems

Patrick McHardy
2005-08-23T17:21:28Z

Danial Thom wrote:
> I think part of the problem is the continued
> misuse of the word "latency". Latency, in
> language terms, means "unexplained delay". Its
> wrong here because for one, its explainable. But
> it also depends on your perspective. The
> "latency" is increased for kernel tasks, while it
> may be reduced for something that is getting the
> benefit of preempting the kernel. So you really
> can't say "the price of reduced latency is lower
> throughput", because thats simply backwards.
> You've increased the kernel tasks latency by
> allowing it to be pre-empted. Reduced latency
> implies higher efficiency. All you've done here
> is shift the latency from one task to another, so
> there is no reduction overall, in fact there is
> probably a marginal increase due to the overhead
> of pre-emption vs doing nothing.

If instead of complaining you would provide the information
I've asked for two days ago someone might actually be able
to help you.