[dpdk-users] Multi-process recovery (is it even possible?)

["Lazarenko, Vlad (WorldQuant)" <Vlad.Lazarenko@worldquant.com>]

Guys,

I am looking for possible solutions for the following problems that come along with asymmetric multi-process architecture...

Given multiple processes share the same RX/TX queue(s) and packet pool(s) and the possibility of one packet from RX queue being fanned out to multiple slave processes, is there a way to recover from slave crashing (or exits w/o cleaning up properly)? In theory it could have incremented mbuf reference count more than once and unless everything is restarted, I don't see a reliable way to release those mbufs back to the pool.

Also, if spinlock is involved and either master or slave crashes, everything simply gets stuck. Is there any way to detect this (i.e. outside of data path)..?

Thanks,
Vlad



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