Memory Positioning of Real-Time Code for Smaller Worst-Case Execution Times

Amine Marref, Adam Betts
<span title="">2011</span> <i title="IEEE"> <a target="_blank" rel="noopener" href="" style="color: black;">2011 16th IEEE International Conference on Engineering of Complex Computer Systems</a> </i> &nbsp;
The process of determining the worst-case execution time (WCET) is challenged in the presence of caches due to their unpredictable effect on the speed of memory references. In particular, when cache conflicts between program lines are common, thrashing occurs and this inadvertently increases the WCET, sometimes significantly so. One way to minimise the cache impact on the WCET, therefore, is to judiciously lay out code and data in memory to avoid cache conflicts. In this paper, we show how to
more &raquo; ... rmulate the WCET-aware code placement problem as a Constraint-Optimization Problem (COP), which can then be efficiently solved by off-the-shelf COP solvers. Experimental evaluation of our proposed analysis shows that the proposed analysis successfully identified code positioning that yields the minimum WCET for over half of the problems within manageable time.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1109/iceccs.2011.10</a> <a target="_blank" rel="external noopener" href="">dblp:conf/iceccs/MarrefB11</a> <a target="_blank" rel="external noopener" href="">fatcat:tya24qfu6bbovack7iqlkpazha</a> </span>
<a target="_blank" rel="noopener" href="" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href=""> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> </button> </a>