Topic
  • 4 replies
  • Latest Post - ‏2012-07-18T14:21:36Z by SystemAdmin
SystemAdmin
SystemAdmin
112 Posts

Pinned topic z/196 Power Save Mode - CPU Time Normalization

‏2012-04-09T19:07:27Z |
Has TDSz (TDSz and TDSz UAC) been modified to handle the new Power Saving Mode on the z196?

• The service unit factor is changed, so all CPU times that
are accumulated in service units are fine, but CPU times
accumulated in seconds (milli-, micro-) are not modified.
• So a job that takes 10 seconds of CPU time during normal
processing could take 12 seconds of CPU time during
power saving mode.

According to some documentation I have seen, there are interval records cut in the type 30s when power save mode is invoked, but the normalization is not automatic.
Updated on 2012-07-18T14:21:36Z at 2012-07-18T14:21:36Z by SystemAdmin
  • KarlaBester
    KarlaBester
    13 Posts

    Re: z/196 Power Save Mode - CPU Time Normalization

    ‏2012-05-02T03:53:32Z  
    Hi Mark

    The changed CPU is an indication of the reduced effective available capacity of the system (less MIPS) during Power Save Mode. It should not be adjusted, as it should not be used for comparison – Service Units should. Service Units are calculated by multiplying the raw CPU times with the SU/sec factor, which changes during Power Save Mode, and therefore can be used for comparison.

    Regards
    Karla
    TDSz Level3
  • SystemAdmin
    SystemAdmin
    112 Posts

    Re: z/196 Power Save Mode - CPU Time Normalization

    ‏2012-06-07T19:17:39Z  
    Hi Mark

    The changed CPU is an indication of the reduced effective available capacity of the system (less MIPS) during Power Save Mode. It should not be adjusted, as it should not be used for comparison – Service Units should. Service Units are calculated by multiplying the raw CPU times with the SU/sec factor, which changes during Power Save Mode, and therefore can be used for comparison.

    Regards
    Karla
    TDSz Level3
    Hi Carla,

    Thanks for getting back to me. Sorry it has taken me awhile to respond.

    There is a component of TDSz called the Usage and Accounting Collector, or UAC. It uses a separate set of modules (DRLCDATA) to process the SMF type 30 records. The UAC reports CPU time in minutes based on values in the 30 record (SMF30CPT, SMF30CPS, etc). I wanted to verify whether there was any adjustment for Power Save mode on the z196.

    I gathered from your previous reply that TDSz doesn't make adjustments to the CPU time fields, bu I wanted to confirm that that was also true for the UAC, since it uses a different set of modules to process the SMF type 30s.

    Regards,

    Mark Pringle
    Managing Consultant
    IT Finance & Chargeback
    Global Technology Services
  • SystemAdmin
    SystemAdmin
    112 Posts

    Re: z/196 Power Save Mode - CPU Time Normalization

    ‏2012-07-12T03:17:50Z  
    Hi Carla,

    Thanks for getting back to me. Sorry it has taken me awhile to respond.

    There is a component of TDSz called the Usage and Accounting Collector, or UAC. It uses a separate set of modules (DRLCDATA) to process the SMF type 30 records. The UAC reports CPU time in minutes based on values in the 30 record (SMF30CPT, SMF30CPS, etc). I wanted to verify whether there was any adjustment for Power Save mode on the z196.

    I gathered from your previous reply that TDSz doesn't make adjustments to the CPU time fields, bu I wanted to confirm that that was also true for the UAC, since it uses a different set of modules to process the SMF type 30s.

    Regards,

    Mark Pringle
    Managing Consultant
    IT Finance & Chargeback
    Global Technology Services
    Hi Mark,

    There is no adjustment on UAC for Power Save mode on the z196.

    Regards,
    Mark
    TDSz L3
  • SystemAdmin
    SystemAdmin
    112 Posts

    Re: z/196 Power Save Mode - CPU Time Normalization

    ‏2012-07-18T14:21:36Z  
    Thanks Mark. It would seem that this is another layer of normalization, except that instead of normalizing between two machines, you are normalizing within a machine. I will discuss this among my Chargeback colleagues to see if a request for enhancement is needed.