Subtest Results

This article describes the results pages for individual subtests found under Kentik’s Tests page.

Note: There are no subtests, and thus no Subtest Results pages, for tests of BGP Monitor type.

The Subtest Results page under the Tests page provides a granular, drilldown view of a specific agent-to-target connection within a broader synthetic test. It allows you to isolate and analyze performance metrics for a single path over a selected time range.

Tip: Subtests are automatically created based on the parent test's configuration (see Test Results). Subtests are not explicitly created by Kentik portal users.

Subtest Results Page UI

This section describes the UI elements of the results page for an individual subtest.

Subtest Results Main Controls

• Subtest Identifier: A heading at the upper left of the page identifies the test by showing what it is testing from and toward.

  Notes: When the from or toward is an agent:

  • An icon to the left of the agent name indicates whether it is a global or private agent.

  • Text below the name displays the cloud region or AS name/number.

  • A green checkmark indicates the agent is active, while a red exclamation mark indicates it is offline.

• Time Range: A dropdown menu to select the lookback period (e.g., Last 1 Hour).

• Latest: Jumps to the most recent data point.

• Details Tabs: A set of tabs on the left (which vary depending on the test type) that provide different test results views for the currently selected time slice.

Alert Timeline

The Alert Timeline provides a visual, interactive chart representing your subtest's data points and overall status over the selected time range (see Status Time and Scope). By default, the latest time slice (far right) is selected, and for which details are given in charts in the Data Section. Hovering over the chart displays the exact timestamps for specific data points.

Data Section

A unified Data section presents the core performance metrics for an individual subtest. Depending on the test type, you can toggle between the following inline tabs:

Time Series

The Time Series tab displays a set of combination and line charts detailing the performance of this specific subtest over time.

• Standard Metrics: Includes Avg Latency (ms), Packet Loss (%), and Avg Jitter (ms), each displaying its Average, Minimum, and Maximum values. Depending on the test, it may also include a Traffic chart detailing inbound and outbound Kbps.

• Chart Behaviors During Failures: When a test fails during a given period, the way it plots depends on the cause:

  • Errors (e.g., agent/OS error): Results in a gap in the plot for Latency, Jitter, and Packet Loss.

  • Timeouts: Results in a gap in the plot for Latency and Jitter, but Packet Loss will spike and be shown as 100%.

• Test-Specific Metrics: Depending on the test type, additional charts will appear automatically:

  • DNS Tests: Displays DNS Results lozenges and a Resolution Time chart.

  • HTTP(S) / API Tests: Displays HTTP Stages Breakdown, Avg HTTP Latency, and HTTP Status Code charts.

  • Page Load Tests: Includes the HTTP charts above, plus a CSS Selectors chart showing a count of configured selectors found on the page.

Path View

The Path View tab graphically represents the hop-by-hop traceroute data specific to this individual subtest path.

Waterfall (Page Load Tests)

For a Page Load subtest, the Waterfall tab shows the load order and load duration of each element in the DOM (see Test Types Reference).

• Filtering: Enter text in the Filter field to filter the resources shown in the table. Choose a scope of either URL or Body using the dropdown in the upper left. Use the Type Selector to isolate specific resource types (e.g., JavaScript, CSS, image), or toggle Errors Only.

• Visual Phases: The download for each resource is represented in the Waterfall column as a horizontal bar broken into colored segments corresponding to different phases (stalled, DNS lookup, SSL, initial connection, request sent, waiting, content downloaded). Hovering over a bar reveals the exact duration of each phase.

Results (Transaction Tests)

The Results tab shows the total transaction completion time for a Transaction subtest.

• Transaction Completion Plot: Individual transactions are plotted as dots. Passing transactions plot on the upper green PASS line, while failing transactions (timeouts) plot on the lower red FAIL line.

• Screenshots: Displays visual captures taken at points specified in your Transaction test script (see About Transaction Test Scripts).

  Note: Screenshots will not be present for a given time slice if the health status during that time was Critical).