Hi Stephen, No, we don’t support RCU. Wouldn’t rw-locks be enough to support your usecases?
Florin > On Oct 29, 2018, at 12:40 PM, Stephen Hemminger <step...@networkplumber.org> > wrote: > > Is it possible to do Read Copy Update with VPP? Either using Userspace RCU > (https://librcu.org) > or manually. RCU is very efficient way to handle read mostly tables and other > dynamic cases > such as plugins. > > The several things that are needed are non-preempt, atomic update of a > pointer and a mechanism to be sure > all active threads have gone through a quiescent period. I don't think VPP > will preempt one node > for another so that is done. The atomic update is relatively > easy with basic barriers, either from FD.IO, DPDK, or native compiler > operations. But > is there an API to have a quiescent period marker in the main VPP vector > scheduler? > > Something like the QSBR model of Userspace RCU library. > (each thread calls rcu_queiscent_state() periodically) > would be ideal. > > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > > View/Reply Online (#11023): https://lists.fd.io/g/vpp-dev/message/11023 > Mute This Topic: https://lists.fd.io/mt/27785182/675152 > Group Owner: vpp-dev+ow...@lists.fd.io > Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [fcoras.li...@gmail.com] > -=-=-=-=-=-=-=-=-=-=-=-
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