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

Christoph Hellwig
2006-09-19T12:08:55Z

On Thu, Sep 14, 2006 at 01:55:44PM -0700, Martin Bligh wrote:
> 1. They're harder to maintain out of tree.
> 2. they're written in some jibberish awk crap
> 3. They're slower. If you're doing thousands of tracepoints a second,
> into a circular 8GB log buffer, that *does* matter. You want
> to peturb what you're measuring as little as possible.

agreed to all these and I'd like to add:

4. If you merge proper dynamic tracing infrastructure you get static
traces for free. It's just a bunch of macros directly calling
the trace function also used by the dynamic tracing code, maybe
keyed of an enable variable.