IBM Power 780 User Manual

136 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
To implement MSPPs, there is a set of underlying techniques and technologies. Figure 3-8
shows an overview of the architecture of multiple shared processor pools.
Figure 3-8 Overview of the architecture of multiple shared processor pools
Micropartitions are created and then identified as members of either the default shared
processor pool
0
or a user-defined shared processor pool
n
. The virtual processors that exist
within the set of micropartitions are monitored by the POWER Hypervisor, and processor
capacity is managed according to user-defined attributes.
If the Power Systems server is under heavy load, each micropartition within a shared
processor pool is guaranteed its processor entitlement plus any capacity that it might be
allocated from the reserved pool capacity if the micropartition is uncapped.
If certain micropartitions in a shared processor pool do not use their capacity entitlement, the
unused capacity is ceded and other uncapped micropartitions within the same shared
processor pool are allocated the additional capacity according to their uncapped weighting. In
this way, the entitled pool capacity of a shared processor pool is distributed to the set of
micropartitions within that shared processor pool.
All Power Systems servers that support the multiple shared processor pools capability will
have a minimum of one (the default) shared processor pool and up to a maximum of 64
shared processor pools.
POWER Hypervisor
p1p0
Physical Shared-Processor Pool
p2 p3 p4 p5 p6 p7
Shared Processor Pool
0
Set of micro-partitions
AIX V5.3
EC 1.6
AIX V6.1
EC 0.8
Linux
EC 0.5
vp0
vp1
vp2 vp3
vp4
AIX V6.1
EC 1.6
AIX V6.1
EC 0.8
Linux
EC 0.5
vp5
vp6
vp7
vp8 vp9
vp10
Shared Processor Pool
1
Set of micro-partitions
Unused capacity in SPP
0
is
redistributed to uncapped
micro-partitions within SPP
0
Unused capacity in SPP
1
is
redistributed to uncapped
micro-partitions within SPP
1
KEY:
EC Entitled Capacity
p Physical processor
vp Virtual processor
SPPn Shared-Processor Pool
n

IBM Power 780 Specifications

General

Brand	IBM
Model	Power 780
Category	Server
Language	English