docs: function(eventName, cpuNumber, pid, ts, eventBase) {
        var event = /crtc=(\d+), seq=(\d+)/.exec(eventBase.details);
        if (!event)
          return false;
  
        var crtc = parseInt(event[1]);
        var seq = parseInt(event[2]);
        this.drmVblankSlice(ts, 'vblank:' + crtc,
            {
              crtc: crtc,
              seq: seq
            });
        return true;
      }