[ltt-dev] UST socket protocol

[Michel Dagenais]

> I've been looking through the socket protocol for UST and am a bit
> curious about the construction of it. Is there a reason we haven't just
> defined a ustctl package type with a command field, a result field and a
> data field?
>
> This would reduce the amount of scanning required by quite a bit.

I have not looked closely at the protocol. Reusing an existing protocol 
would make sense. For instance, reusing the GDB protocol could be 
interesting since GDB is already capable of listing and activating UST 
tracepoints. Moreover, the GDB protocol is also used by kgdb to enable 
kernel dynamic tracepoints with kprobes with a recent patch. I doubt 
that the GDB protocol would be optimized for fast transfers of tracing 
data, but that may be transmitted through a separate channel.

The TCF protocol could be another candidate.