Qiao Li, Liang Shi, Yejia Di, Yajuan Du, Kaijie Wu, C. Xue, Qingfeng Zhuge, E. Sha
{"title":"A PV aware data placement scheme for read performance improvement on LDPC based flash memory: work-in-progress","authors":"Qiao Li, Liang Shi, Yejia Di, Yajuan Du, Kaijie Wu, C. Xue, Qingfeng Zhuge, E. Sha","doi":"10.1145/3125502.3125549","DOIUrl":"https://doi.org/10.1145/3125502.3125549","url":null,"abstract":"This paper proposes to improve read performance of LDPC based flash memory by exploiting process variation (PV). The work includes three parts. First, a block grouping approach is proposed to classify the flash blocks based on their reliability. Second, based on the grouping approach, a read data placement scheme is proposed, which is designed to place read-hot data on flash blocks with high reliability. However, simply placing read-hot data to high reliable blocks conflicts with recent PV-aware wear leveling schemes. In the third part of the work, a grouping partition scheme is proposed to limit the number of high reliable blocks for read-hot data. In this case, read performance can be well improved with little impact on the lifetime improvement.","PeriodicalId":350509,"journal":{"name":"Proceedings of the Twelfth IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis Companion","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125783440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings of the Twelfth IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis Companion","authors":"","doi":"10.1145/3125502","DOIUrl":"https://doi.org/10.1145/3125502","url":null,"abstract":"","PeriodicalId":350509,"journal":{"name":"Proceedings of the Twelfth IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis Companion","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121858959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}