Improving Performance of Partial Reconfiguration Using Strategy of Virtual Deletion

摘要

In a partially reconfigurable system with onlineplacement algorithm, we try to avoid mapping someredundant tasks by caching modules on thereconfigurable area. This paper proposes an elaboratestrategy named virtual deletion and a low cost boardlevelhardware named recycle cache to accomplish thegoal. In our strategy, the record of correspondingmodule is deleted from placer and indexed in therecycle cache. If the module might be used byfollowing tasks, it can be restored from reconfigurablearea by recycle cache immediately, without mappingthe module again. Recycle cache can shorten averageconfiguring time of partial reconfiguration withoutincreasing arithmetic complex and placing time of theplacer. Compared with large size of local register filewhich cache context of modules, the recycle cycle ismuch smaller and cheaper. Simulation results on largerandom tasks sets have shown that the recycle cachecan improve performance of partially reconfigurablesystem effectively.