Re: What's that displayed on 'top'?
On 11/30/05, michael <linux@networkingnewsletter.org.uk> wrote:
> > 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).
> >
>
> hopefully i said 'hard interruprt' for hi
of course...
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