LitTLS: Lightweight Thread-Level Speculation on Little Cores

doi:10.1145/3719655

	LitTLS: Lightweight Thread-Level Speculation on Little Cores
	Cheng, Xin 1,2; Ye, Jinpeng 1,2; Deng, Haoyu 1,2; Zhang, Tingting 3; Liu, Tianyi 4; Wang, Jian 1,2
	2025-06-01
发表期刊	ACM TRANSACTIONS ON ARCHITECTURE AND CODE OPTIMIZATION
ISSN	1544-3566
卷号	22 期号:2 页码:27
摘要	Thread-Level Speculation (TLS) utilizes speculative parallelization to accelerate hard-to-parallelize serial codes on multi-cores. As the heterogeneous multi-core architecture is becoming ubiquitous, it presents an opportunity for TLS to reorganize little cores for the acceleration of these serial codes instead of a big core with similar or more area and power. However, previous TLS designs significantly suffer from extended hardware overhead and costly speculative forwarding. We present LitTLS, a lightweight TLS design with versioning caches to eliminate significant extended hardware overhead by storing versions in caches without speculative write buffers and memory undo-logs. Additionally, LitTLS introduces the Speculative Address Table, a novel component to accelerate speculative forwarding with a central structure to trace memory dependencies. Evaluations on four little cores show that LitTLS achieves an average performance speedup of 2.87x compared to a little core, outperforming a big core by 94% with similar area and less power. The extended area size is only 0.07 mm2, and the maximum increase in dynamic power consumption is limited to 0.3%, compared to four little cores.
关键词	Thread-level speculation parallel computing heterogeneous multicore
DOI	10.1145/3719655
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2022YFB3105100]
WOS研究方向	Computer Science
WOS类目	Computer Science, Hardware & Architecture ; Computer Science, Theory & Methods
WOS记录号	WOS:001533440900008
出版者	ASSOC COMPUTING MACHINERY
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42093
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Zhang, Tingting; Liu, Tianyi
作者单位	1.Chinese Acad Sci, State Key Lab Processors, Inst Comp Technol, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Loongson Technol Co Ltd, Beijing, Peoples R China 4.Univ Texas San Antonio, Comp Sci, San Antonio, TX 78249 USA
推荐引用方式 GB/T 7714	Cheng, Xin,Ye, Jinpeng,Deng, Haoyu,et al. LitTLS: Lightweight Thread-Level Speculation on Little Cores[J]. ACM TRANSACTIONS ON ARCHITECTURE AND CODE OPTIMIZATION,2025,22(2):27.
APA	Cheng, Xin,Ye, Jinpeng,Deng, Haoyu,Zhang, Tingting,Liu, Tianyi,&Wang, Jian.(2025).LitTLS: Lightweight Thread-Level Speculation on Little Cores.ACM TRANSACTIONS ON ARCHITECTURE AND CODE OPTIMIZATION,22(2),27.
MLA	Cheng, Xin,et al."LitTLS: Lightweight Thread-Level Speculation on Little Cores".ACM TRANSACTIONS ON ARCHITECTURE AND CODE OPTIMIZATION 22.2(2025):27.