The document discusses multicore and shared memory multiprocessors, highlighting the distinction between multicore processors and shared memory multiprocessor systems. It categorizes shared memory multiprocessors into uniform memory access (UMA), non-uniform memory access (NUMA), and cache-only memory access (COMA), detailing their architecture and interconnection methods. The document also covers specific types of NUMA, including non-caching NUMA and cache-coherent NUMA, along with their interconnection networks.

1. MULTICORE & SHARED MEMORY
MULTIPROCESSORS

2. A single computing component with two or more independent processing
units
Multicore Processor
Shared Memory Multiprocessor (SMP)
Computer system composed of multiple independent processors that
executes different instruction schemes

3. SHARED MEMORY MULTIPROCESSORS
1. Uniform Memory Access (UMA)
2. Non Uniform Memory Access (NUMA)
3. Cache Only Memory Access (COMA)
1. Non-Caching NUMA (NC-NUMA)
2. Cache-Coherent NUMA (CC-NUMA)

4. SHARED MEMORY MULTIPROCESSORS
UNIFORM MEMORY ACCESS (UMA)
Interconnect (Bus, Crossbar, Multistage network)
Processor 1 Processor 2 Processor n
I/O Shared Memory 1 Shared Memory n

5. SHARED MEMORY MULTIPROCESSORS
NON-UNIFORM MEMORY ACCESS (NUMA)
Processor 1
Processor 2
Processor n
Local Memory 1
Local Memory 2
Local Memory n
Interconnection
Network

6. SHARED MEMORY MULTIPROCESSORS
NON-UNIFORM MEMORY ACCESS (NUMA)
1. Non- Caching NUMA (NC-NUMA)
MMU
CPU Memory
Local Bus
System Bus
MMU
CPU Memory
Local Bus
MMU
CPU Memory
Local Bus

7. SHARED MEMORY MULTIPROCESSORS
NON-UNIFORM MEMORY ACCESS (NUMA)
2. Cache-Coherent NUMA (CC-NUMA)
Interconnection Network
CPU Memory
Local Bus
Directory
Node 0
CPU Memory
Local Bus
Directory
Node 4
CPU Memory
Local Bus
Directory
Node 255

8. SHARED MEMORY MULTIPROCESSORS
CACHE ONLY MEMORY ACCESS (COMA)
COMA is a special case of NUMA model. All the distributed main
memories are converted to cache memories