Hi Vivek, Aslam, That’s an interesting use case. We typically recommend using VCL natively and only if that’s not possible use LDP, which implies VLS locking. We haven’t had many VLS native integration efforts.
Coming back to your problem, any particular reason why you’re not registering all your app’s pthreads as vcl workers and have them listen on the same ip:port? Then vpp would just distribute incoming connections to all workers which can in parallel handle tls establishment and io. If that’s not possible, you’re doing the right thing by using VLS. I’m assuming you’re creating those epoll sessions within the pthreads/workers? If that’s not the case, and you have sessions added to those epfds, you should get a "can't migrate nonempty epoll session” error. If on the other hand you accept sessions on only one worker, and then hand them off to other workers, you’ll need to change ownership/share those sessions in vpp as well, i.e., modify vls_clone_and_share_rpc_handler and have it call vls_init_share_session (which today it is not if mt workers is on). This is the least efficient option as it involves a lot of work per each session. Regards, Florin > On Feb 7, 2023, at 12:54 PM, Vivek Gupta <viv...@benisontech.com> wrote: > > Hi, > > We have SSL based application using VCL. > > - Currently, we have one thread which does the epoll, TLS Session > establishment, Read/Write for multiple tunnels. > > - Now we want to split the functionality in different threads, such that TLS > Session establishment happens in a separate thread, > read/write happens in another thread and Epoll is happening in separate > thread. > > - To do this, we want migrate the VCL sessions from one VCL worker to another > VCL worker using the VLS wrapper. > > - We notice that post the migration read/write is working fine from the > migrated thread, but EPOLL indications are not coming to either the > old thread or the new thread. > > Since we are using VLS, we have set multi-thread-workers option to TRUE. > > If we use the single VCL worker based VLS option, epoll is working fine for > us. But it will require lot of locks and hence trying to avoid that option. > > Please let us know if epoll is supported for migrating the VCL sessions, with > multi-thread-workers option set to true. Also, any pointers > any specific changes to be done for that will help a lot. > > > Regards, > Vivek
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