nsolid-manager/nsolid/console/src/collect/graphs/spectrogram.js

A manager that sets up and runs N|Solid for you

var d3 = require('d3')
var createGraph = require('../graph-cache')

var GB = 1024 * 1024 * 1024

// create a width * height 2d array
function zero (out) {
  for (var i = 0; i < out.length; i++) {
    var row = out[i]
    for (var j = 0; j < row.length; j++) {
      out[i][j] = 0
    }
  }
  return out
}

function computeCPUSpectrogram (application, width, height) {
  var appGraph = createGraph({type: 'app', id: application.id})
  appGraph.grid('CPUSpectrogram', width, height, function buildCPUSpectrogram (graph) {
    var processes = application.processes

    // input ranges
    var min = 0
    var max = 100

    var data = d3.layout.histogram()
    .frequency(false)
    .bins(d3.range(min, max, max / height).concat(max))
    .value(p => p.cpu)(processes)

    // update columns
    var insert = data.map(d => d.y)
    graph.push(insert)
    graph.shift()
    return insert
  })
}

function computeRSSSpectrogram (application, width, height) {
  var appGraph = createGraph({type: 'app', id: application.id})
  appGraph.grid('RSSSpectrogram', width, height, function buildRSSSpectrogram (graph) {
    var processes = application.processes
    var totalRSS = Math.max(d3.sum(processes, p => p.memory.rss), GB)

    // input ranges
    var min = 0
    var max = 1

    var data = d3.layout.histogram()
    .frequency(false)
    .bins(d3.range(min, max, max / height).concat(max))
    .value(p => p.memory.rss / totalRSS)(processes)

    // update columns
    var insert = data.map(d => d.y)
    graph.push(insert)
    graph.shift()
    return insert
  })
}

function computeSpiffygram (application, width, height) {
  var appGraph = createGraph({type: 'app', id: application.id})
  appGraph.grid('spiffygram', width, height, function buildSpiffygraom (grid) {
    // since the spiffygram computation is additive, reset
    // all of the grid cells to 0 befor processing
    zero(grid)

    var processes = application.processes

    var totalRSS = Math.max(d3.sum(processes, p => p.memory.rss), GB)
    var incrementor = 1 / processes.length

    processes.forEach(function (g) {
      var Xratio = Math.min(g.cpu / 100, 0.99)
      var Yratio = Math.min(g.memory.rss / totalRSS, 0.99)

      var x = Math.floor(Xratio * width)

      // flip the Y-Axis so small values are on the bottom
      var y = (height - 1) - Math.floor(Yratio * height)
      var gridX = grid[x]
      if (gridX && y < gridX.length) {
        gridX[y] += incrementor
      }
    })
  })
}

exports.computeRSSSpectrogram = computeRSSSpectrogram
exports.computeCPUSpectrogram = computeCPUSpectrogram
exports.computeSpiffygram = computeSpiffygram