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			<titleStmt><title level='a'>&lt;i&gt;fPIM:&lt;/i&gt; A Holistic Design to Optimize PIM Data Flow for High Execution Efficiency</title></titleStmt>
			<publicationStmt>
				<publisher>IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS</publisher>
				<date>05/01/2026</date>
			</publicationStmt>
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				<bibl> 
					<idno type="par_id">10705117</idno>
					<idno type="doi">10.1109/TPDS.2026.3670145</idno>
					<title level='j'>IEEE Transactions on Parallel and Distributed Systems</title>
<idno>1045-9219</idno>
<biblScope unit="volume">37</biblScope>
<biblScope unit="issue">5</biblScope>					

					<author>Nan Wang</author><author>Wenjie Liu</author><author>Qing Liu</author><author>Xubin He</author>
				</bibl>
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			<abstract><ab><![CDATA[Not AvailableAs applications demand more bandwidth, the “memory wall” problem becomes increasingly severe. Therefore, the processing-in-memory (PIM) architecture has attracted significant research interest due to its ability to execute instructions offloaded by the processor. Existing works on PIM architectures are classified into two categories: regional offloading, where all instructions within a programmer-specified code region are offloaded, and selective offloading, where only instructions of interest are offloaded via hardware support. However, PIM architectures pose the amplified in-PIM traffic overhead challenge that endangers the performance of PIM and degrades the performance of the entire system. To address the challenge, we propose a PIM architecture, called fast PIM (fPIM), which integrates the PIM cache within each Channel Controller to optimize the data flow within the PIM.This design cooperates with the Processing Unit Load-balancer and Behavior-based Offloader to achieve high execution efficiency. To evaluate fPIM, we perform extensive experiments, and the results show that fPIM reduces the workload finish time by up to 88.6%, 87.5%, and 79.6% (with an average of 68.7%, 66.2%, and 59.8%), compared to three state-of-the-art PIM designs, PEI, Fafnir, and SpaceA, respectively.]]></ab></abstract>
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