Hi list
   Can anyone explain me what exactly does the WAIT
I/O column of the sar -u output mean?

   Does it represent the % of CPU used by the kernel
processes to perform I/O? 

   As far as I know the waiting processes do no wait
actively when they ask for an I/O. right? The OS uses
the SLEEP and WAKEUP primitives.
   So, Which process is using this CPU? (The WAIT
I/O%)

   Or does this WAIT I/O have to be taken as if the
CPU were idle?

Please shed some light on this.
Thanks

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