Goetz,

Thank you for your response.

Yes the 11% makes sense, I did over look that.

And I did intentionally forget to mention the 6 fiber channels.

But it does make sense now.

So the question would be, Since a 1GB fiber card is indeed an overly fat pipe.  Would it be better
to have 8 fiber channels or only 4?  Given that the ability of an N-Class box stressing an XP512
through 4 channels is not very high.

-Craig



--- Goetz Neumann <[log in to unmask]> wrote:

> Craig asks:
>
> > I continuely see these processes on the top of Glance.
> >
> > This is an N-class 550/300
> >
> > P2    SYS MANAGER.SYS         2 LOAD       B142  2.0%   0.0   0   0.0  MISC
> > P3    SYS MANAGER.SYS         3            B100  1.7%   0.0   0   0.0  MISC
> > P4    SYS MANAGER.SYS         4            A  0  4.2%   0.0   0   0.0  MSG
> > P5    SYS MANAGER.SYS         5            A  0  4.4%   0.0   0   0.0  MSG
> > P6    SYS MANAGER.SYS         6            A  0  4.4%   0.0   0   0.0  MSG
> > P7    SYS MANAGER.SYS         7            A  0  4.3%   0.0   0   0.0  MSG
> > P8    SYS MANAGER.SYS         8            A  0  4.4%   0.0   0   0.0  MSG
> > P9    SYS MANAGER.SYS         9            A  0  7.1%   0.0   0   0.0  MSG
> >
>
> > That's 32.5% overhead!
>
> It would be, if you had only 1 CPU . but you have 3 .
> I.e. 'overhead' is ~ 11% .
>
> > Does anybody know what is happening?
>
> Pin 2 is LOAD.PUB.SYS used to load CM programs (FCOPY, DSCOPY ?)
> and CM/SL library code of the OS or your applications.
>
> Pin 3 is pm_cleanup, used to clean the remains of dead processes
> (like deleting the stack, heap, etc) from memory. 1.7 % might mean
> you have a higher than usual process creation and termination rate.
>
> Pins 4..9  are different on 7.5 compared to earlier releases.
> In very simple terms they are Fibre Channel's IO facilitating
> processes (called PFPs  - port facility process) .  I do not
> have ballpark numbers for what is "normal", it might simply be
> that your system is doing a higher number of FibreChannel IOs,
> or that something on your FC loop or SAN is very 'talkative'.
>
> If your DISC screen in Glance shows the system as IO idle,
> and you still get >= 4% CPU per process (pins 4..9) _then_ I
> would think something is not ok.
>
>
> Goetz
>
> PS: 'posting via email (reply to the DIGEST), the new
>       news gateway seems not operational yet?'
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
>





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