[Csync2] linux kernel cpu optimization

[Ask Bjørn Hansen]

On Sep 11, 2008, at 6:03, Vincent Régnard wrote:

> I forced all disk interrupt on CPU1 using the /proc/irq/IRQ/ 
> smp_affinity trick, but I observe that CPU1 remains in waiting state  
> too much as shown by the top above (about 50% on average) when csync  
> is checking the whole file system tree.

If only a few files are changing, why are you checking the full tree?   
Basically doing stat on a million files is going to incur a bunch of  
disk i/o (and thus iowait state).


  - ask

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