Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

Martin Bligh
2006-09-15T18:18:51Z

>>Also, care to explain how kprobes can be used to access same data
>>without having to actually customize a probe point for every binary?
>
>
> Thats why we have things like systemtap.
>
> All we appear to lack is systemtap ability to parse debug data so it can
> be told "trace on line 9 of sched.c and record rq and next"

But that's the whole point - if it's not integrated into a marker as
source code, it requires manual intervention for every bloody release
to do. "line 9 of sched.c" is a farcically stupid way of doing tags
on a dynamically moving project like the linux kernel.

Yes, that may work OK for something that is very static, like a distro
snapshot, but as a general mechanism, it's unsustainable and broken.

M.