Dedicated Donating CPUs

skol

Hello

We changed our VIOs from Entitled 3.0 to "dedicated donating" 3 cores.

In lpar2rrd it seemed the usage of the cores went massiv down (about one core).

But if we compare it with the nmon data it didn't change much.

Comparing todays value we see about 1 core less usage in lpar2rrd than in nmon.

Here a picture from lpar2rrd and nmon-analyzer for the same timeframe.

Did someone else have the same effect?

lpar2rrd version 7.20

CPU Settings VIO: 3 Cores dedicated donating

Pavel

Hi,

lpar2rrd presents CPU allocation which should be always higher than CPU utilisation from the OS point of view.

Compare it with HMC native graphs, what do you see there?

skol

lpar2rrd and the calues in the HMC native graphs seem to match.

I am wondering why nmon on the VIOs report much more.

The same day we changed to dedicated donating we also updated the VIO to the latest release.

I will do more tests on a test VIO. Maybe I can find out if it is general showning to much or only in dedicated donating.

Pavel

what is reporting vmstat in "pc" column? I think same as lpar2rrd/HMC.

Involve AIX support ...

skol

unfortunately does "vmstat" not show any "pc" values if the the lpar is in dedicated donating mode.

Pavel

ah, ok, contact IBM support, we have no explanation.

let us know if you get any.