On Fri, Oct 16, 2015 at 12:02:28PM +0200, Ingo Molnar wrote: > > * Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > > - We may be making some technical compromises a.t.m for the sake of > > > using perf. > > > > > > perf_event_open() requires events to either relate to a pid or a > > > specific cpu core, while our device pmu relates to neither. Events > > > opened with a pid will be automatically enabled/disabled according > > > to the scheduling of that process - so not appropriate for us. > > > > Right; the traditional cpu/pid mapping doesn't work well for devices; > > but maybe, with some work, we can create something like that > > global/local render context from it; although I've no clue what form > > that would need at this time. > > Could someone please help with some very basic questions, such as what the > hardware model of the 'OA' unit model is? How are OA registers set up, how are > their values made accessible to the host side, etc. Robert linked to: https://01.org/sites/default/files/documentation/observability_performance_counters_haswell.pdf In a previous posting. It has some info, but full documentation, is as per the initial post, 'pending'. _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
