On Mon, 28 Nov 2005, Tshepang Lekhonkhobe wrote:
Hello,
On the CPU row of top, there's various stuff displayed:
'us' (which I assume is CPU cycles consumed by processes owned by the
user running top), 'sy' (which I assume is those owned by root), 'id'
(which I assume means idle), and there is 'wa', 'hi', 'si' whose
meaning I don't know.
I checked on the manpage without success... Could anyone tell me what
these last 3 (wa, hi, si) mean.
us is 'user' meaning any process regardless of owner running in user
space. User space is unpriviledged processes without hardware access like
the kernel.
sy is system. Regardless of user it's CPU cycles used by threads inside
the kernel e.g. working for processes asking for hardware access.
id is idle
wa is wait which is CPU cycles wasted on waiting for hardware especially
disk, access.
hi I've never seen
si must be swap in? Meaning pages swapped in from swap space.
Regards,
Henrik Morsing
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