Re: What's that displayed on 'top'?
On 11/28/05, Henrik Morsing <henrik@morsing.cc> wrote:
>
> 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.
That's a handful. Thanks... (although we do have 'soft interrupt' and
'hi interrupt' as Michael later mentioned).
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