feedback from google

[Frank Ch. Eigler]

Karim Yaghmour wrote:

> That's the reason why things like LTT and relayfs are necessary.

OK, though especially relayfs assumes that all that trace data has to
be dumped to user space, rather than being filtered/aggregated in the
kernel.


> [...]
> Having a set of pre-defined, statically-included, and dynamically-
> selectable events is the only solution for the kind of situation
> where thousands and thousands of events are generated per second.

It should not be hard to associate systemtap probes with static
instrumentation points, without using kprobes, and thus avoiding the
cost of an interrupt.


- FChE