I'm just wondering, as I cannot find any calls for the DTRACE_NET_SOCKET_WRITE or DTRACE_NET_SOCKET_READ methods ANYWHERE in the code base, other than when they are defined in ./src/node_dtrace.cc. I did some searching on the main node.js commit history, and it seems when net.js was split into net_uv.js and net_legacy.js, those two tracing methods were never re-added to the core, and simply forgotten about.