IBM eServer i5 Manual 

Also see for eserver i5: Handbook Cabling guide

Contents

iSeries. mySeries.Processor ConceptsVirtual Processors Rules & requirements : It is possible to allocate more virtual processors than there are in the shared processor pool The actual number of processor in the shared processor pool is a “floating” number A single physical processor can report in the system as a n-ways You cannot allocate less than 0.10 PU per virtual processor Example : requesting 0.20 PU to run on 4 VCPU means 0.20 / 4 = 0.05 < 0.10 ! Changes are dynamic, without any IPL within the configured ranges29iSeries. mySeries.Processor ConceptsUncapped Processors Uncapped allows to potentially utilizes unused processor capacity in the system Uncapped weight is used to determine how unused capacity is distributed : P1 weight is 200 P2 weight is 100 P1 will receive 2/3 of the unused shared processor capacity P2 will receive 1/3 of the unused shared processor capacity If P1 does not need all 2/3 of capacity, then P2 could get more !30