How to get out physc?

[matthias.hofer at arz.co.at]

Hi!

> > I am using GNU/Linux (SLES9) on an IBM p5 right now and want to get 
out
> > how much "physc" the LPAR consumes; on AIX, this can be accomplished 
> > with
> > sar, vmstat, topas, nmon and mpstat.
> > On GNU/Linux, I could not find any of these utilities in a Version 
that
> > would show me such an info.
> 
> So what is "physc"?

On IBM Power5-Systems Logical Partitions use up the amount of CPU-time, 
that they really need. "physc" is the value that represents the amount of 
Physical CPUs that the LPAR consumes.
On AIX, sar shows:

$ sar

AIX aix0003a 3 5 00C1D7DF4C00    08/19/05

System configuration: lcpu=4 ent=0.40

02:00:00    %usr    %sys    %wio   %idle   physc   %entc
02:05:00      77      10       6       7    0.86   215.6
02:10:01      44      24      11      22    0.35    87.3
02:15:00      39      22      12      27    0.32    80.3
02:20:00      45      18      12      25    0.32    79.3
02:25:00      35      19      10      35    0.28    70.3
02:30:00      41      19       7      33    0.30    76.1
02:35:00      23      11       6      60    0.17    43.5
02:40:00      78      10       1      11    0.50   125.8
02:45:00      90       2       0       7    1.04   260.6
02:50:01      90       2       0       7    1.06   264.5
02:55:00      90       2       0       7    1.07   266.3
03:00:00      91       2       0       7    1.05   263.5
03:05:00      88       4       2       7    1.13   283.4
03:10:00      87       4       1       7    1.17   293.6
03:15:00      90       3       1       7    1.11   277.1
03:20:00      90       3       0       7    1.06   265.8
03:25:00      91       2       0       7    1.04   261.2
03:30:01      90       2       0       7    1.05   263.0
03:35:00      91       2       0       7    1.04   260.1
03:40:00      90       2       0       7    1.05   263.6
03:45:00      91       2       0       7    1.04   259.8

So, this LPAR used between 0.17 and 1.17 Physical CPUs at a given time.
vmstat, for example, shows:

$ vmstat 2 3

System configuration: lcpu=4 mem=5120MB ent=0.40

kthr    memory              page              faults              cpu  
----- ----------- ------------------------ ------------ 
-----------------------
 r  b   avm   fre  re  pi  po  fr   sr  cy  in   sy  cs us sy id wa    pc  
 ec
 1  0 697996 457310   0   0   0   0    0   0 505  783 1276 88  3  8  1 
1.07 266.4
 2  0 697996 457310   0   0   0   0    0   0 731 2291 1680 88  4  7  2 
1.12 280.7
 2  0 697996 457310   0   0   0   0    0   0 1096 8121 2482 85  6  7  3 
1.17 292.5

The next-to-last value is "physc" (pc).

I found out that "nmon" is able to measure and show this value for the 
LPAR on GNU/Linux, but I hoped for something like sar, for historical 
data.
Anybody confident with GNU/Linux on IBM-Power5 with Advanced 
Virtualization?

Thank you!

Matthias Hofer

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