[vlovich123]

> This has an advantage compared to a multi-threaded CPU-based cache, because it avoids performance overheads associated with multiple threads having to synchronize with each other to realize they are about to start a stampede.

The switch presumably also has multiple cores which still need to do this work, no? Or is the claim that moving this synchronization to the router behind a network hop saves CPU cycles on the app server?

[blakepelton]

The relevant part of the switch hardware described by the OrbitCache paper doesn't have typical processor cores. Instead it is an "RMT" pipeline.

I wrote a brief description of RMT here: https://danglingpointers.substack.com/p/scaling-ip-lookup-to...