一句话：提出非推测的 DARSIE 机制，利用编译期标记与内核启动信息在取指前跳过 GPU 中多维线程块间的冗余 SIMT 指令。
在众核多线程架构中，不同线程冗余执行具有相同操作数的同一指令是显著的效率来源。本文提出维度感知的冗余 SIMT 指令消除（DARSIE），一种非推测的指令跳过机制，用于减少 GPU 中的冗余操作。DARSIE 结合编译器提供的静态标记与内核启动时获得的信息，在冗余指令被取指之前将其跳过，从而使其不进入流水线。该工作基于一个新观察：在多维线程块中，warp 指令之间存在大量冗余。摘要未给出具体性能数据，但机制设计旨在降低冗余执行开销。
In massively multithreaded architectures, redundantly executing the same instruction with the same operands in different threads is a significant source of inefficiency. This paper introduces Dimensionality-Aware Redundant SIMT Instruction Elimination (DARSIE), a non-speculative instruction skipping mechanism to reduce redundant operations in GPUs. DARSIE uses static markings from the compiler and information obtained at kernel launch time to skip redundant instructions before they are fetched, keeping them out of the pipeline. DARSIE exploits a new observation that there is significant redundancy across warp instructions in multi-dimensional threadblocks.
DOI 原文 ·
@inproceedings{paperbot5398,
title = {Dimensionality-Aware Redundant SIMT Instruction Elimination},
author = {Tsung Tai Yeh and Roland N. Green and Timothy G. Rogers},
booktitle = {ASPLOS},
year = {2020},
doi = {10.1145/3373376.3378520}
}