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cmd/geth: re-scale charts when changing unit magnitudes

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This commit is contained in:
Péter Szilágyi 2015-06-26 21:48:21 +03:00
parent b0a5be4495
commit 7e69392249
1 changed files with 38 additions and 24 deletions
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62
cmd/geth/monitorcmd.go
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@ -103,33 +103,20 @@ func monitor(ctx *cli.Context) {
footer.Height = 3
charts := make([]*termui.LineChart, len(monitored))
units := make([]int, len(monitored))
data := make([][]float64, len(monitored))
for i := 0; i < len(data); i++ {
data[i] = make([]float64, 512)
}
for i, metric := range monitored {
charts[i] = termui.NewLineChart()
if runtime.GOOS == "windows" {
charts[i].Mode = "dot"
}
charts[i].Data = make([]float64, 512)
charts[i].DataLabels = []string{""}
charts[i].Height = (termui.TermHeight() - footer.Height) / rows
charts[i].AxesColor = termui.ColorWhite
charts[i].PaddingBottom = -2
charts[i].Border.Label = metric
charts[i].Border.LabelFgColor = charts[i].Border.FgColor | termui.AttrBold
charts[i].Border.FgColor = charts[i].Border.BgColor
for i := 0; i < len(monitored); i++ {
charts[i] = createChart((termui.TermHeight() - footer.Height) / rows)
row := termui.Body.Rows[i%rows]
row.Cols = append(row.Cols, termui.NewCol(12/cols, 0, charts[i]))
}
termui.Body.AddRows(termui.NewRow(termui.NewCol(12, 0, footer)))
termui.Body.Align()
termui.Render(termui.Body)
refreshCharts(xeth, monitored, data, charts, ctx, footer)
refreshCharts(xeth, monitored, data, units, charts, ctx, footer)
termui.Body.Align()
termui.Render(termui.Body)
// Watch for various system events, and periodically refresh the charts
@ -149,7 +136,9 @@ func monitor(ctx *cli.Context) {
termui.Render(termui.Body)
}
case <-refresh:
refreshCharts(xeth, monitored, data, charts, ctx, footer)
if refreshCharts(xeth, monitored, data, units, charts, ctx, footer) {
termui.Body.Align()
}
termui.Render(termui.Body)
}
}
@ -246,18 +235,21 @@ func fetchMetric(metrics map[string]interface{}, metric string) float64 {
// refreshCharts retrieves a next batch of metrics, and inserts all the new
// values into the active datasets and charts
func refreshCharts(xeth *rpc.Xeth, metrics []string, data [][]float64, charts []*termui.LineChart, ctx *cli.Context, footer *termui.Par) {
func refreshCharts(xeth *rpc.Xeth, metrics []string, data [][]float64, units []int, charts []*termui.LineChart, ctx *cli.Context, footer *termui.Par) (realign bool) {
values, err := retrieveMetrics(xeth)
for i, metric := range metrics {
data[i] = append([]float64{fetchMetric(values, metric)}, data[i][:len(data[i])-1]...)
updateChart(metric, data[i], charts[i], err)
if updateChart(metric, data[i], &units[i], charts[i], err) {
realign = true
}
}
updateFooter(ctx, err, footer)
return
}
// updateChart inserts a dataset into a line chart, scaling appropriately as to
// not display weird labels, also updating the chart label accordingly.
func updateChart(metric string, data []float64, chart *termui.LineChart, err error) {
func updateChart(metric string, data []float64, base *int, chart *termui.LineChart, err error) (realign bool) {
dataUnits := []string{"", "K", "M", "G", "T", "E"}
timeUnits := []string{"ns", "µs", "ms", "s", "ks", "ms"}
colors := []termui.Attribute{termui.ColorBlue, termui.ColorCyan, termui.ColorGreen, termui.ColorYellow, termui.ColorRed, termui.ColorRed}
@ -274,17 +266,20 @@ func updateChart(metric string, data []float64, chart *termui.LineChart, err err
for high >= 1000 {
high, unit, scale = high/1000, unit+1, scale*1000
}
// If the unit changes, re-create the chart (hack to set max height...)
if unit != *base {
realign, *base, *chart = true, unit, *createChart(chart.Height)
}
// Update the chart's data points with the scaled values
for i, value := range data {
chart.Data[i] = value / scale
}
// Update the chart's label with the scale units
chart.Border.Label = metric
units := dataUnits
if strings.Contains(metric, "/Percentiles/") || strings.Contains(metric, "/pauses/") {
units = timeUnits
}
chart.Border.Label = metric
if len(units[unit]) > 0 {
chart.Border.Label += " [" + units[unit] + "]"
}
@ -292,6 +287,25 @@ func updateChart(metric string, data []float64, chart *termui.LineChart, err err
if err != nil {
chart.LineColor = termui.ColorRed | termui.AttrBold
}
return
}
// createChart creates an empty line chart with the default configs.
func createChart(height int) *termui.LineChart {
chart := termui.NewLineChart()
if runtime.GOOS == "windows" {
chart.Mode = "dot"
}
chart.Data = make([]float64, 512)
chart.DataLabels = []string{""}
chart.Height = height
chart.AxesColor = termui.ColorWhite
chart.PaddingBottom = -2
chart.Border.LabelFgColor = chart.Border.FgColor | termui.AttrBold
chart.Border.FgColor = chart.Border.BgColor
return chart
}
// updateFooter updates the footer contents based on any encountered errors.