IBM Mainframe Discussion List <[email protected]> wrote on 07/17/2006 12:29:39 PM:
> In a message dated 7/17/2006 11:26:03 A.M. Central Daylight Time, > [EMAIL PROTECTED] writes: > > >The hypervisor would be required to swap the clock comparator and the CPU > >timer, since not doing that would cause incorrect charging and lost > >interrupts. > That's a matter of how the function would be implemented. I'm sure there > would be other things the hypervisor would have to do, too. I > doubt that the > function exists. The CPU Timer and the Clock Comparator are virtualized. Each logical CP has its own copy of the CPU Timer and the Clock Comparator. A logical CP's CPU Timer is decremented only while the logical CP is dispatched on a physical CP. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
