Hardware And Software Requirements - IBM Power 570 Technical Overview And Introduction

4405ch02 Architecture and technical overview.fm
Processor Core Nap The IBM POWER6 processor uses a low-power mode called Nap
EnergyScale for I/O

2.2.1 Hardware and software requirements

This sections summarizes the supported systems and software user interfaces for
EnergyScale functions.
Table 2-1 EnergyScale systems support
7998-61X
8203-E4A
8204-E8A
9117-MMA (<
4.20 GHz)
9117-MMA
(>= 4.2 GHz)
a. An iPDU is required for this support. The feature code 5889 is for a base iPDU in a rack while
the feature code 7109 is for additional iPDUs for the same rack. Supported racks are 7014-B42,
7014-S25, 7014-T00 and 7014-T42.
b. Only supported if GX Dual Port RIO-2 Attach (FC 1800) is not present.
The primary user interface for EnergyScale features on a POWER6 based system is IBM
Systems Director Active Energy Manager™ running within IBM Director
Table 2-2 on page 29 shows the ASMI, HMC and Active Energy Manager interface support.
28
IBM Power 570 Technical Overview and Introduction
power
in the data center. The margined power is the amount of extra
power that is allocated to a server during its installation in a
datacenter. It's based on the server environmental specifications that
usually are never reached. Since server specifications are always
based on maximum configurations and worst case scenarios.
that stops processor execution when there is no work to do on that
processor core, both threads are idle. Nap mode allows the hardware
to clock off most of the circuits inside the processor core. Reducing
active power consumption by turning off the clocks allows the
temperature to fall, which further reduces leakage (static) power of
the circuits causing a cumulative effect. Unlicensed cores are kept in
core Nap until they are licensed and return to core Nap whenever
they are unlicensed again.
IBM POWER6 processor-based systems automatically power off
pluggable, PCI adapter slots that are empty or not being used to save
approximately 14 watts per slot. System firmware automatically
scans all pluggable PCI slots at regular intervals looking for ones that
meet the criteria for being not in use and powers them off. This
support is available for all POWER6 processor-based servers, and
the expansion units that they support. Note that it applies to hot
pluggable PCI slots only.
Power Power saver
trending mode
Y Y
Y Y
Y Y
a
Y - via iPDU N
a b
Y - via iPDU Y
Draft Document for Review May 28, 2009 1:59 pm
Power Processor
capping Nap
Y Y
Y Y
Y Y
N Y
N Y
I/O
N
Y
Y
Y
Y