• Eric Anholt's avatar
    sources/perf: Capture DRM vblank events as a mark. · ac11f0f9
    Eric Anholt authored
    This should be useful to visualize system-wide events in the CPU
    timeline, especially once we add some more events.
    We may want to define some modes eventually, as not all captures will
    care about GPU visualization.  However, it's pretty low overhead (60Hz
    * number of monitors), so maybe we can just filter it out at
    visualization time.
    We do a bit more setup work than necessary here (looking up the config
    number for the tracepoint per CPU, rather than looking it up once at
    startup), but I suspect I'll want to refactor the init anyway once we
    add more tracepoint markers.
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