IBM Power 780 Technical Overview And Introduction page 150

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.
Unused capacity in SPP
redistributed to uncapped
micro-partitions within SPP
Shared Processor Pool
Set of micro-partitions
AIX V5.3 AIX V6.1
EC 1.6 EC 0.8
vp1
vp0
p0 p1
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
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.
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IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
is
0
0
0
Linux
EC 0.5
vp4
vp2 vp3
p2 p3 p4
Physical Shared-Processor Pool
or a user-defined shared processor pool
0
Unused capacity in SPP
redistributed to uncapped
micro-partitions within SPP
Shared Processor Pool
Set of micro-partitions
AIX V6.1 AIX V6.1
EC 1.6 EC 0.8
vp7
vp6
vp5 vp8
POWER Hypervisor
KEY:
p5 p6 p7
EC
p
vp
SPPn Shared-Processor Pool
. The virtual processors that exist
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1
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1
Linux
EC 0.5
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vp9
Entitled Capacity
Physical processor
Virtual processor
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