Occamy: Elastically Sharing a SIMD Co-processor across Multiple CPU Cores Article Swipe
Zhongcheng Zhang
,
Yan Ou
,
Ying Liu
,
Chenxi Wang
,
Yongbin Zhou
,
Xiaoyu Wang
,
Yuyang Zhang
,
Yucheng Ouyang
,
Jiahao Shan
,
Ying Wang
,
Jingling Xue
,
Huimin Cui
,
Xiaobing Feng
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1145/3582016.3582046
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1145/3582016.3582046
SIMD extensions are widely adopted in multi-core processors to exploit data-level parallelism. However, when co-running workloads on different cores, compute-intensive workloads cannot take advantage of the underutilized SIMD lanes allocated to memoryintensive workloads, reducing the overall performance. This paper proposes Occamy, a SIMD co-processor that can be shared by multiple CPU cores, so that their co-running workloads can spatially share its SIMD lanes. The key idea is to enable elastic spatial sharing by dynamically partitioning all the SIMD lanes across different workloads based on their phase behaviors, so that each workload may execute in variable-length SIMD mode. We also introduce an Occamy compiler to support such variable-length vectorization by analyzing such phase behaviors and generating the vectorized code that works with varying vector lengths. We demonstrate that Occamy can improve SIMD utilization, and consequently, performance over three representative SIMD architectures, with negligible chip area cost.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1145/3582016.3582046
- https://dl.acm.org/doi/pdf/10.1145/3582016.3582046
- OA Status
- gold
- Cited By
- 2
- References
- 34
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4327911853
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4327911853Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1145/3582016.3582046Digital Object Identifier
- Title
-
Occamy: Elastically Sharing a SIMD Co-processor across Multiple CPU CoresWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2023Year of publication
- Publication date
-
2023-03-20Full publication date if available
- Authors
-
Zhongcheng Zhang, Yan Ou, Ying Liu, Chenxi Wang, Yongbin Zhou, Xiaoyu Wang, Yuyang Zhang, Yucheng Ouyang, Jiahao Shan, Ying Wang, Jingling Xue, Huimin Cui, Xiaobing FengList of authors in order
- Landing page
-
https://doi.org/10.1145/3582016.3582046Publisher landing page
- PDF URL
-
https://dl.acm.org/doi/pdf/10.1145/3582016.3582046Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
-
https://dl.acm.org/doi/pdf/10.1145/3582016.3582046Direct OA link when available
- Concepts
-
SIMD, Computer science, Parallel computing, Compiler, Vectorization (mathematics), Multi-core processor, Code (set theory), Operating system, Programming language, Set (abstract data type)Top concepts (fields/topics) attached by OpenAlex
- Cited by
-
2Total citation count in OpenAlex
- Citations by year (recent)
-
2024: 2Per-year citation counts (last 5 years)
- References (count)
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34Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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