realtime preemption performance difference

Hi all,

I want to check performance difference by using realtime preemption patch :

http://www.kernel.org/pub/linux/kernel/projects/rt/

Please let me know from where I can download samples to test realtime
preemption performance difference.

Can someone please share performance numbers for your hardware:-

1. Interrupt latency
2. Task switching time
3. hard-realtime scheduling latency

Thank you,

Jaswinder Singh.
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