If you're interested in this topic, I highly suggest some of the talks and papers about the LMAX Disruptor [0] and Martin Thompson's latest project Aeron [1]. It targets the JVM, but the lessons are generally applicable since I don't think Concord/Aria are open source.
[0] https://lmax-exchange.github.io/disruptor/ [1] https://github.com/real-logic/aeron