Exploiting Choice: Instruction Fetch and Issue on an Implementable Simultaneous Multithreading Proce

Time

2020.11.1

Summary

Research Objective

Problem Statement

Method(s)

Evaluation

Conclusion

This paper presents a simultaneous multithreading architecture that：
● borrows heavily from conventional superscalar design, requiring little additional hardware support,
● minimizes the impact on single-thread performance, running
only 2％ slower in that scenario, and
● achieves significant throughput improvements over the superscalar when many threads are running: a 2.5 throughput gain at 8 threads, achieving 5.4 IPC

Notes

BRANCHYIRST：issues branches as early as possible in order to identify tnispredicted branches quickly.

Perfect branch prediction boosts throughput by 25% at 1 thread,15% at 4 threads, and 9% at 8 threads.

Words

speculative 投机的
side effect 副作用
proposing 提出
alignment 校准
dual 双重
interfere 干扰
saturate 饱和
excess 过量
access 存取
the dispatch stack 调度堆栈
Multiscalar 多标量

Sentence

Much as the fetch unit can choose which threads to fetch
就像存取单元可以选择要存取的线程一样
the amount of improvement
改善程度
benefits much less from
从...获得的收益少得多

TimtLine

标签：thread,Exploiting,Instruction,fetch,throughput,superscalar,threads,存取,Processor
来源： https://www.cnblogs.com/call-me-dasheng/p/13909513.html