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lparstat inconsistent reporting of Power Saver Mode

  • 1.  lparstat inconsistent reporting of Power Saver Mode

    Posted Wed June 22, 2016 03:29 PM

    Originally posted by: sjhall


    Our environment contains multiple rack-mounted P710 (8231-E1D) servers managed by an HMC (7042-CR4/v7.7.9.0.3). All servers are configured as FSP AIX 7.1 systems at oslevel 7100-04-02-1614. Some are 6-core, a few are 4-core, but this does not seem to directly affect the observed behavior.

    Using ASM from the HMC the servers have been set to use Dynamic Power Saver (Favor Power) mode.  Upon login, and attempted verification using the "lparstat -I" command, some indicate Static Power mode. Oddly, sometimes the same servers, at different times, using the same "lparstat -I" command, will indicate either of the two modes with no intervening efforts having been made to change the mode. ASM consistently indicates that Dynamic Power Saver (Favor Power)  is selected and I believe that to be the truth of the matter. Just wondering if anyone else has observed this behavior.

    Thanks,

    Steve



  • 2.  Re: lparstat inconsistent reporting of Power Saver Mode

    Posted Sat July 23, 2016 05:05 AM

    Originally posted by: Mr_AIX


    Hi Steve.

     

    I saw something similar on my S824 and E880's.  There are two settings, Idle Power Saver and Power Saver Mode.

    Here is what IBM support told me when I raised a PMR about this.  I was trying to disable Power Saver Mode, but this should point you where to look.

     

                                                     

    Please ensure that both "Idle Power Saver" and "Power Saver Mode" are  

    set to Disabled from ASMI.                                              

                                                                          

    The settings, Idle Power Saver, will dynamically move the system in and out static power saving mode based on utilization.  If you wish to check

    if this is enabled, it is in ASM under System Configuration > Power    

    Management > Idle Power Saver.                                         

                                                                          

    Then, Also in order to disable Power Saving Mode on the AIX LPAR shown  in # lparstat -i.                                                      

    chpwrmgmt - change power management settings                           

                                                                          

    #lssyscfg -r sys -F name                                               

    #chpwrmgmt -m managed-system -r sys -o {enable | disable}              

                                                                          

    AND                                                                     

                                                                          

    From HMC GUI, from the left side, System Management, Servers and select

    the server in question                                                 

    Operations, Power Management, Disable the current and desired power    

    saver mode.                                                            

                                                                          

    From HMC GUI, from the left side, System Management, Servers and select

    the server in question                                                 

    Operations, Launch Advanced System Management (ASM)                    

                                                                            

    Once you're logged in into ASMI, from the left side, System            

    Configuration, Power Management Mode Setup, Power Saver, Disabled      

                                                                          

    Now it should be disabled from the HMC side, check by running:         

    # lspwrmgmt [-m managed-system] -r sys                                 

                                                                            

    Moving to AIX side, run:                                               

    # lparstat -i |grep Power                                              

    ----- snip -----                                                       

                                                                           

    I also found some cases whereby the discrepancies between different   

    outputs was caused by a firmware problem, and was subsequently resolved

    after a FW update.  Thus, if you still see problems after attempting   

    above actions/cmds, pls go ahead and open a HW call. For the HMC, this 

    can be done through SR Tool and selecting Hardware (not appliance).    

                                                                          

    I hope this helps.                                                     



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