One regular misconception about (cycle time), irrespective of the type of processor the 'speed/cycle time' of ALL the processors is the SAME. CPs with CAPACITY setting of 7xx (Zxx in case of the 'BC' class system) are FULL capacity. Others are sub-capacity. So if the workload system hasn't enough capacity, then it might not run as well as one with abundance. So from a cycle point (speed?), zIIPs are not faster.
Parwez Hamid ________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Mike Schwab <[email protected]> Sent: 02 March 2019 21:07 To: [email protected] Subject: Re: CPU time and zIIP Especially since zIIPs are faster but cost lest, and CPs are slower. One nice feature about reduced speed CPs is any delay waiting for resources are not counted toward your reduced speed for a CP. On Sat, Mar 2, 2019 at 2:49 PM Martin Packer <[email protected]> wrote: > > Agreed. I - for maybe 20 years - have recommended reporting on each > processor pool separately. > > Cheers, Martin > > Martin Packer > > zChampion, Systems Investigator & Performance Troubleshooter, IBM > > +44-7802-245-584 > > email: [email protected] > > Twitter / Facebook IDs: MartinPacker > > Blog: > https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker > > Podcast Series (With Marna Walle): https://developer.ibm.com/tv/mpt/ or > > https://itunes.apple.com/gb/podcast/mainframe-performance-topics/id1127943573?mt=2 > > > Youtube channel: https://www.youtube.com/channel/UCu_65HaYgksbF6Q8SQ4oOvA > > > > From: Peter Relson <[email protected]> > To: [email protected] > Date: 02/03/2019 16:21 > Subject: Re: CPU time and zIIP > Sent by: IBM Mainframe Discussion List <[email protected]> > > > > >is that true for CPU percent also? > > The original post and my answers were about SDSF. They did not show (to > the best of my eyesight) or discuss any percentage fields. > > Are you now asking a question about a percentage shown in RMF? I don't > pretend to know anything about what RMF displays, but it would likely not > be a good idea to try to lump together busy percentages pertaining to > standard CPs and zIIPs because the two types of processors are intended to > > have different characteristics in terms of how busy it is appropriate for > them to be. > > Peter Relson > z/OS Core Technology Design > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > > > > Unless stated otherwise above: > IBM United Kingdom Limited - Registered in England and Wales with number > 741598. > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
