An argument for simple COMA

@article{Saulsbury1995AnAF,
  title={An argument for simple COMA},
  author={Ashley Saulsbury and Tim Wilkinson and John B. Carter and Anders Landin},
  journal={Proceedings of 1995 1st IEEE Symposium on High Performance Computer Architecture},
  year={1995},
  pages={276-285}
}
We present design details and some initial performance results of a novel scalable shared memory multiprocessor architecture. This architecture features the automatic data migration and replication capabilities of cache-only memory architecture (COMA) machines, without the accompanying hardware complexity. A software layer manages cache space allocation at a page-granularity-similarly to distributed virtual shared memory (DVSM) systems, leaving simpler hardware to maintain shared memory… 
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The authors explain the functionality, architecture, performance, and complexity of COMA systems, which compare COMA to traditional nonuniform memory access (NUMA) systems, and describe proposed improvements in NUMA systems that target the same performance obstacles as COMA.
Research Feature Cache-Only Memory Architectures
TLDR
The functionality, architecture, performance, and complexity of COMA systems are explained, different COMA designs are outlined, COMA to traditional cache-coherent non-uniform memory access (NUMA) systems are compared, and proposed improvements in NUMA systems that target the same performance obstacles as COMA are described.
The Impact of Memory Organization in Hybrid DSM
TLDR
This study compares the design issues and performance consequences for adopting in hybrid DSM four memory organizations inspired from existing architectures: CC-NUMA, RCNUma, S-COMA, and COMA.
PRISM: an integrated architecture for scalable shared memory
TLDR
Adaptive, run-time policies that take advantage of PRISM's ability to dynamically configure shared memory pages with different behaviors significantly outperform pure CC-NUMA or Simple-COMA configurations and are usually within 10% of optimal performance.
Reducing Remote Con ict Misses in Shared-Memory Multiprocessors: NUMA with Remote Cache and COMA
  • Computer Science
  • 2007
TLDR
To compare the performance of the two organizations for the same amount of total memory, a model of data sharing is introduced that uses three data sharing patterns: replication, read-mostly migration, and read-write migration.
2 CC-NUMA and COMA-F Architectures
Distributed shared memory multiprocessors with cache coherent non-uniform memory architectures (CC-NUMA) have become popular in the memory design of multiprocessors in recent years. The shared data…
Evaluating the Memory Performance of a ccNUMA System
TLDR
This work presents a detailed memory performance analysis of a particular ccNUMA system (the SGI Origin 2000) and presents a new memory profiling tool and a new set of microbenchmark codes, called snbench, which make such a fine-grained memoryperformance analysis possible.
964 COMA : AN OPPORTUNITY FOR BUILDING FAULT-TOLERANT SCALABLE SHARED MEMORY MULTIPROCESSORS
TLDR
The class of Cache Only Memory Architectures (COMA) are good candidates for building fault-tolerant SSMMs and a backward error recovery strategy can be implemented without signiicant hardware modiication to previously proposed COMA by exploiting their standard replication mechanisms and extending the coherence protocol to transparently manage recovery data.
Simple COMA Shared Memory and the RS / 6000 SP White Paper
TLDR
The Simple COMA shared memory architecture and the potential implementation of this architecture on the IBM RS/6000 SP parallel computer are explained.
A Dual Address Space Architecture: Implementation and Evaluation
TLDR
This dissertation proposes changes to a hardware-based DSM architecture that allow users to use two address spaces to gain the scalability of distributed architectures while retaining the benefits of the shared address space architecture.
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