{"title":"外部缓存性能对实时系统可预测性的影响","authors":"J. Busquets-Mataix, J. J. Serrano","doi":"10.1109/RTCSA.1995.528744","DOIUrl":null,"url":null,"abstract":"Cache memories are commonly avoided in real-time systems because of their unpredictable behavior. Recently, some research has been done to obtain tighter bounds on the worst case execution time of cached programs. These techniques usually assume a non preemptive underlying system. However, some techniques can be applied to allow the use of caches in preemptive systems. This paper compares methods for dealing with extrinsic cache behavior (inter-task cache interference). Time-domain oriented methods (the inter-task cache interference is incorporated in the schedulability analysis) are compared to space-domain oriented ones (increase of the cache predictability by assigning private cache partitions to tasks). The obtained results bound the applicability domain for each method for a variety of hardware and workload configurations. The results can be used as design guidelines.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"8","resultStr":"{\"title\":\"The impact of extrinsic cache performance on predictability of real-time systems\",\"authors\":\"J. Busquets-Mataix, J. J. Serrano\",\"doi\":\"10.1109/RTCSA.1995.528744\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Cache memories are commonly avoided in real-time systems because of their unpredictable behavior. Recently, some research has been done to obtain tighter bounds on the worst case execution time of cached programs. These techniques usually assume a non preemptive underlying system. However, some techniques can be applied to allow the use of caches in preemptive systems. This paper compares methods for dealing with extrinsic cache behavior (inter-task cache interference). Time-domain oriented methods (the inter-task cache interference is incorporated in the schedulability analysis) are compared to space-domain oriented ones (increase of the cache predictability by assigning private cache partitions to tasks). The obtained results bound the applicability domain for each method for a variety of hardware and workload configurations. The results can be used as design guidelines.\",\"PeriodicalId\":111365,\"journal\":{\"name\":\"Proceedings Second International Workshop on Real-Time Computing Systems and Applications\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1995-10-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings Second International Workshop on Real-Time Computing Systems and Applications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RTCSA.1995.528744\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RTCSA.1995.528744","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The impact of extrinsic cache performance on predictability of real-time systems
Cache memories are commonly avoided in real-time systems because of their unpredictable behavior. Recently, some research has been done to obtain tighter bounds on the worst case execution time of cached programs. These techniques usually assume a non preemptive underlying system. However, some techniques can be applied to allow the use of caches in preemptive systems. This paper compares methods for dealing with extrinsic cache behavior (inter-task cache interference). Time-domain oriented methods (the inter-task cache interference is incorporated in the schedulability analysis) are compared to space-domain oriented ones (increase of the cache predictability by assigning private cache partitions to tasks). The obtained results bound the applicability domain for each method for a variety of hardware and workload configurations. The results can be used as design guidelines.