[dpdk-dev] rte_hash thread safe

[Stephen Hemminger]

On Mon, 23 Apr 2018 17:48:50 -0700
Jim Murphy <jmurphy at arista.com> wrote:

> Anecdotally I've heard that the urcu hash implementation is slower than
> rte_hash based on pure lookup performance. Has anyone considered adding RCU
> hooks into rte_hash?


Not really possible with DPDK (as I said earlier) because DPDK does not have concept
of thread quiescent period to allow for safe deletion.  You could manually use RCU
concepts of RCU and RTE hash; it would require using userspace RCU primitives
inside DPDK.  This would cause a dependency that would prevent that from ever
being merged upstream due to license conflict; but since DPDK is liberal BSD
license you are free to do it and maintain it on your own.