IBM 170 manual Level 1 Cache, Level 2 Cache

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Following is an example of the processor card information for a 333 MHz Model 170:

Processor Card:

 

Part Number

11K0857

EC Level

D72830

Serial Number

L200016008

FRU Number

00P2180

Manufacture ID

1980

Version

RS6K

Product Specific.(ZC)

PS=0013D92D40,LB=0009EC96A0,

 

SB=0005ABC3C9,NP=01,L2=01024,

 

PF=711,SV=3,VR=2,ER=0000

Product Specific.(ZB)

BC=30602,SG=

Physical Location: P1-C1

 

PS shows the processor speed in hex-number digit (0x0013D92D40 = 333000000 Hz = 333 MHz).

Following is an example of the processor card information for a 400 MHz Model 170:

Processor Card:

 

Part Number

11K0864

EC Level

D72830

Serial Number

L200016010

FRU Number

00P2181

Manufacture ID

1980

Version

RS6K

Product Specific.(ZC)

PS=0017D78400,LB=000BEBC200,

 

SB=0005F5E100,NP=01,L2=04096,

 

PF=7D4,SV=3,VR=2,ER=0000

Product Specific.(ZB)

BC=30602,SG=

Physical Location: P1-C1

 

PS shows the processor speed in hex-number digit (0x0017D78400 = 400000000 Hz = 400 MHz).

Level 1 Cache

The Model 170 uses a 64 KB data and 32 KB instruction 128-way set associative L1 cache. The size of both data and instruction cache reduces the number of cache misses, results in more cache hits, and maximizes performance. Both data and instruction cache are parity protected.

Level 2 Cache

The 44P Model 170 processor card has either 1 MB (333 MHz) or 4 MB

(400 MHz) of L2 cache located on the processor card. L2 cache is used to lower the time spent accessing memory data and increase performance. The L2 cache extends L1 cache benefits by adding more cache to the memory pipeline.

The speed of the L2 cache is dependent upon the processor speed. The L2 cache speed for the 333 MHz processor is 167 MHz (2:1 ratio) and for the 400 MHz processor is 200 MHz (2:1 ratio).

The L2 cache uses a direct mapped cache methodology. There is a dedicated external interface to the L2 cache not shared with the 6XX bus. This allows concurrent access to both the L2 cache and the 6XX bus.

6RS/6000 7044 Model 170 Technical Overview

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Contents RS/6000 7044 Model RS/6000 7044 Model 170 Technical Overview History Minimum Configuration and Optional FeaturesGeneral Description Physical Package 170 Mechanical ViewProcessor and Cache System UpgradeArchitecture and Technical Information POWER3 Versus POWER3-II Processors Branch/DispatchCopper and Cmos Technology CPU Clock RateLevel 1 Cache Level 2 Cache170 Memory Location Diagram MemoryPCI Bus, Slots, and Adapters Memory Boot Time DeconfigurationSystem Buses LAN Adapters Graphics AcceleratorsSSA Adapters Hot Plug PCI Adapters CapabilitiesInternal Disk Bays and Media Bays Service ProcessorSelected Service Processor Functions Boot Options and Limitations MiscellaneousDVD Support ISA SupportReference SecuritySoftware Requirements System DocumentationSources AcknowledgmentsInternet Links Biographies Special Notices 16 RS/6000 7044 Model 170 Technical Overview