Chart configuration toolbar options
The toolbar of the Chart Configuration panel defines chart options that apply to all series in a chart.
It has the following options:
- Range modifier
- Use the slider to limit the range of values for the chart. The upper slider defines the upper limit and the lower slider adjusts the floor. As you move these two sliders, the chart re-scales based on the newly defined range.
- Chart Type
- Use the Type buttons on the left side of the toolbar to choose between one
of the following chart types:
- In a filled chart, each series is displayed as an area filled with the color specified
in the chart configuration.
Figure 6-33 A filled chart example
- In a line chart, each series is displayed as a colored line.
Figure 6-34 A line chart example
- In a bar chart, each series is displayed as a colored bar. Each bar in
the chart represents a time bin.
Figure 6-35 A bar chart example
- Y-axis modifier
- Use the drop-down menu to select one of the following options:
- In a stacked style chart, filled line charts are stacked on top of each
other. The Timeline view stacks a filled line graph representing
the series at the top of the chart control on top of the series
that appear beneath it. So, the highest point of the graphs in a
stacked chart is an aggregate of data from all of the series
contained in the chart control. For example, if the first value
of series A is three and the first value of series B is five,
the first data point in the stack chart that contains these
series is eight.
Figure 6-36 A stacked chart example
- Stacked charts are appropriate when the events are counted in exactly one of the series in a chart. For example, this is useful in a case where a chart contains both Data Read Hits and Data Read Misses.
- An overlay chart contains a line for each series defined in the chart
control. Series higher in the chart control appear behind series
that are lower. For example, in the following screenshot, series
A is above series B in the chart control. So, as series A has a
value of three and series B has a value of five, the value from
series A is obstructed from view by the larger value from series
B. For this reason, it is important to place higher value series
higher in the chart control when using an overlay chart. Drag
and drop series controls to reorder them.
Figure 6-37 Data from series A obstructed by data from series B
- Overlay charts are appropriate when some of the events are counted in more than one series in the same chart. Data Read Requests and Data Read Hits are a good example of this.
- Shows all data points on a log10(y) scale where y is each Y-axis data point in the
chart. This Y-axis modifier is useful when there is a huge
difference between the minimum and maximum values in a chart. In
charts with these huge deltas, it can be hard to differentiate
between the lower value data points in the chart. Setting the
Y-axis modifier to Logarithmic can give you a better visual
representation of your data in these cases. A logarithmic chart
displays with a series of horizontal lines in Streamline, each
line represents an increase in value by a power of ten, so that
if data point A sits exactly one line higher than data point B,
A is ten times higher than B.
NoteIf the actual value of a data point in a Streamline logarithmic chart is less than one, it appears in the Streamline chart like a zero value. This is because the logarithmic value of such a data point would be a negative number.
Figure 6-38 Logarithmic scale
- Use this field to give the chart a title. The title appears at the top of the handle for the chart in the Timeline view.
- Average Selection
- When you have this option checked, any selection you make using the Cross Section Marker shows the average value of all bins included in the selection. If unchecked, the overlay is a total value of all bins.
- Average Cores
- When you have this option checked, values in a multi-core chart are the average of the individual cores, unless you have used the multi-core disclosure control to show metrics per core. If unchecked, the multi-core chart shows the totals for all cores.
- In a percentage style chart, values are plotted as percentages between 0 and 100.
- Save as Snippet
- Saves the current chart as a Snippet. After it has been saved, you can use the Snippet menu, located in the bottom left of the Timeline view to add this chart as it is currently configured.
- Remove Chart
- Removes the current chart from the Timeline view. If you have saved the chart as a Snippet, you can add it back to the Timeline view later using the Snippet menu.