Publication

When the ARM weakly consistent memory model meets speculation: is it necessary?

2012
Student Projects

Abstract

Aggressive memory-level-parallelism techniques have provided significant performance gain in Distributed Share Memory Designs. In this paper, we reevaluate speculative memory ordering in the context of Chip Multi-Processors (CMPs) and power-limited computation. We evaluate relative performance between Sequential Consistency, Total Store Order and Relaxed Memory Order on a selection of modern workloads to predict the performance of the ARM weakly consistent memory model.

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2012
Student Projects

Abstract

Official source

Related concepts (32)

Consistency model

In computer science, a consistency model specifies a contract between the programmer and a system, wherein the system guarantees that if the programmer follows the rules for operations on memory, memory will be consistent and the results of reading, writing, or updating memory will be predictable. Consistency models are used in distributed systems like distributed shared memory systems or distributed data stores (such as s, databases, optimistic replication systems or web caching).

Computer performance

In computing, computer performance is the amount of useful work accomplished by a computer system. Outside of specific contexts, computer performance is estimated in terms of accuracy, efficiency and speed of executing computer program instructions. When it comes to high computer performance, one or more of the following factors might be involved: Short response time for a given piece of work. High throughput (rate of processing work). Low utilization of computing resource(s). Fast (or highly compact) data compression and decompression.

Multi-core processor

A multi-core processor is a microprocessor on a single integrated circuit with two or more separate processing units, called cores, each of which reads and executes program instructions. The instructions are ordinary CPU instructions (such as add, move data, and branch) but the single processor can run instructions on separate cores at the same time, increasing overall speed for programs that support multithreading or other parallel computing techniques.

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When the ARM weakly consistent memory model meets speculation: is it necessary?

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