This patch https://imil.net/NetBSD/tslog.patch is a port of FreeBSD's tslog(4) which permits to ease pinpointing parts of the kernel and userland where the most time is spent. This tracing facility is what allowed to reduce NetBSD kernel boot time as it gives the ability to produce flamegraphs like this one https://imil.net/NetBSD/tslog-10052025.svg and see what functions are taking the most time. ------------------------------------------------------------------------ Emile `iMil' Heitor <imil@{home.imil.net,NetBSD.org}> | https://imil.net