Re: [ANNOUNCE] New utility: 'trace'

[Thomas Gleixner]

On Wed, 17 Nov 2010, Avi Kivity wrote:

> 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.

Could you explain that a bit more detailed please ?

Thanks,

	tglx
 
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