DPDK Userspace 2018

Recent patches have tried to address the reader-writer concurrency in rte_hash library. However, these fall short on solving the problem on multiple use cases. These solutions result in further significant problems when the use cases involve preemptible writer threads. Lock-free addition and deletion algorithms are required to truly solve the read-write concurrency. This talk explores the need for lock-free algorithms in the context of rte_hash library, the changes required in rte_hash for 64bit systems. It will also discuss various options available for solving the issue on 32bit systems and seek feedback. Performance numbers with this proposal will also be presented.