option = {
  title: {
    text: 'Percentage of page walk time overhead caused by data TLB misses',
    subtext: 'GUPS RandomAccess benchmark'
  },
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'shadow'
    }
  },
  xAxis: {
    name: 'input-data \nsize',
    type: 'category',
    data: ['2^29', '2^30', '2^31', '2^32'],
  },
  yAxis: {
    // name: 'Percentage',
    type: 'value',
    title: 'align'
  },
  series: [
    {
      name: "Percentage",
      data: [13.20, 19.50, 45.22,66.81],
      type: 'bar',
      label: {
        show: true,
        position: 'top'
      },
    }
  ]
};