This branch makes some improvements to our current tracing diagnostics. In particular, I wanted to improve our ability to trace early kernel initialization. I've changed the kernel to initialize the tracing subscriber much earlier, without waiting for the Serial Mux service to actually start. This way, traces we emit before sermux comes up get buffered and are sent over serial when it comes up and crowtty connects. I've also changed the default tracing level when no crowtty has connected from OFF to INFO, so that we can actually record high-level traces from the boot process.
Also, I've improved some of the existing tracing diagnostics, and added new ones.
This branch makes some improvements to our current
tracingdiagnostics. In particular, I wanted to improve our ability to trace early kernel initialization. I've changed the kernel to initialize thetracingsubscriber much earlier, without waiting for the Serial Mux service to actually start. This way, traces we emit before sermux comes up get buffered and are sent over serial when it comes up and crowtty connects. I've also changed the defaulttracinglevel when nocrowttyhas connected fromOFFtoINFO, so that we can actually record high-level traces from the boot process.Also, I've improved some of the existing tracing diagnostics, and added new ones.
Here's what the new tracing looks like: