<snip> > > It depends on the datastructure. > > If you use rte_hash, with the thread safety flags, it's safe. > > In any case having a lot of cores accessing the same DS will lead to bad > performance. You should try to have per-core data structures whenever > possible. Even better if you can create a lock free data structure and combine it with RCU. You can look at lock-free version of rte_hash implementation. There was a presentation done on this topic in the previous DPDK summit[1].
[1] https://dpdkuserspace2018.sched.com/event/G44w/lock-free-read-write-concurrency-in-rtehash > > Tom > > ________________________________________ > De : dev <dev-boun...@dpdk.org> de la part de Perugu Hemasai Chandra > Prasad <hemasaiper...@5g.iith.ac.in> Envoyé : jeudi 5 décembre 2019 > 11:16 À : us...@dpdk.org; dev@dpdk.org > Objet : [dpdk-dev] Sharing Data structure between logical cores in DPDK- > regarding > > Hi All, > I have a small doubt, can we share a data structure between multiple > logical cores in DPDK without locking? I have tested it by sharing a small > structure with two variable and incrementing them in all logical cores. It ran > smooth I didn't get any issue. But I doubt if we can run it for long time with > some huge data structure having many elements getting accessed by multiple > logical cores. > Can anyone please clarify this. > > Thanks and regards, > Hemasai.
