noatime effect

[Mag Gam <magawake@xxxxxxxxx>]

I know that with noatime attribute,
http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap6sec73.html,
it will have a performance gain. I want to know how I can figure out
how much the kernel is waiting its time without noatime. Is the
possible?
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