Bela Lubkin made comment on Thu Apr 8 08:10:14 2004 :
> Tom Melvin wrote:
>
> > I have a machine that is showing a high %sys in sar.
> >
> > Used cpuhog/iohog/memhog along with u386mon + top and nothing shows
> > the offending process(es) - ps listings are normal. No sign of swapping.
> > Resorted to brute force and killed process after process and sar
> > still showing high %sys.
> >
> > Anyone any ideas?
> >
> > Running OSR 5.0.7 + Update Pack 2
> > Single Pentium P4 + 512Mb Ram + Adaptec Raid
> > HyperThreading Enabled.
>
> Link scodb into the kernel ('Y' in /etc/conf/sdevice.d/scodb; relink;
> reboot). While the problem is happening, do some ad hoc kernel
> profiling by repeatedly breaking into scodb. At a text console
> multiscreen, hit Ctrl-Alt-D. At the resulting scodb prompt, "b" (a
> short alias for "stack"), then "q". Repeat many times. Get a feel for
> what the kernel is doing when you expect it to be idle.

Is there another way to 'access' scodb - I am remote so will either be
using a telnet session or dial-up modem - while the modem is a character
based tty line CTRL X or ALT-CTRL-D does not want to operate.

Tom


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Tom Melvin tom@tkrh.demon.co.uk http://www.tkrh.demon.co.uk
Veterinary Solutions Ltd
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