Re: PREEMPT_RT and I-PIPE: the numbers, part 4

[Daniel Walker]

On Sat, 2005-07-09 at 09:19 +0200, Ingo Molnar wrote:


> (if your goal was to check how heavily external interrupts can influence 
> a PREEMPT_RT box, you should chrt the network IRQ thread to SCHED_OTHER 
> and renice it and softirq-net-rx and softirq-net-tx to nice +19.)
> 

This is interesting. I wonder how much tuning like this , just changing
thread priorities, which would effect the results of these tests.
PREEMPT_RT is not pre-tuned for every situation , but the bests
performance is achieved when the system is tuned. If any of these tests
rely on a low priority thread, then we just raise the priority and you
have better performance.

These other systems like Vanilla 2.6.x , and I-pipe aren't massively
tunable like PREEMPT_RT . 

Daniel 

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