Messages in this thread | | | Date | Thu, 24 Oct 2019 15:56:32 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 4/4] perf/x86/intel/pt: Opportunistically use single range output mode |
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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?
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