Re: [ANNOUNCE] New utility: 'trace'

[Avi Kivity]

On 11/17/2010 05:41 PM, Tom Zanussi wrote:
> > The only reason why these filters might make sense is to reduce the
> > trace volume on system wide traces in production environments, but
> > that's a completely different story. These scenarios can do with the
> > dynamic tracepoint stuff and the custom filtering w/o putting the
> > burden on the majority of users.
> Yeah, in my mind, the main point of the filters was to be a 'blunt
> force' instrument preventing userspace from being overwhelmed by events.
> The real filtering would happen in userspace with e.g. real scripting
> languages.

Filtering is also useful for fine-grained perf events; this cannot be 
done in userspace.

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