Re: [PATCH v2 4/4] perf/x86/intel/pt: Opportunistically use single range output mode

[Peter Zijlstra]

On Tue, Oct 22, 2019 at 12:58:12PM +0300, Alexander Shishkin wrote:
> Most of PT implementations support Single Range Output mode, which is
> an alternative to ToPA that can be used for a single contiguous buffer
> and if we don't require an interrupt, that is, in AUX snapshot mode.
> 
> Now that perf core will use high order allocations for the AUX buffer,
> in many cases the first condition will also be satisfied.
> 
> The two most obvious benefits of the Single Range Output mode over the
> ToPA are:
>  * not having to allocate the ToPA table(s),
>  * not using the ToPA walk hardware.
> 
> Make use of this functionality where available and appropriate.

This seems independent of the snapshot stuff, right?