* Peter Zijlstra <[email protected]> wrote:
> On Fri, 2012-07-27 at 09:26 +0200, Ingo Molnar wrote:
> >
> > Maybe someone on Cc: would be interested in implementing this
> > new perf events feature?
>
> Why would we go build new kernel interfaces because userspace
> is silly?
Because it's (much) easier to use the existing perf tools almost
as-is instead of librarizing your own.
It would also allow other usecases, like self-profiling a
library and then profiling it within the context of a larger app
that you don't want to rebuild and which dynamically links this
library.
It also allows system-wide profiling after you've modified a
library to self-profile, while your suggestion does not allow
that.
> It really isn't that hard to make userspace do what is needed,
> it just takes a bit of work.
Even if your suggested solution was available (it isn't), my
suggested approach is easier to use and covers more usecases.
User-space expecting the kernel to provide usable and minimal
interfaces is not 'being silly'. It's the fundamental task of a
kernel to provide them.
Thanks,
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
