Using the DWP Latency Tester

The DWP Latency Tester gathers latency data for use by Technical Support in troubleshooting connection problems. You only need to use this tool at the request of Technical Support.

The Latency Tester is integrated with the DWP Network Packet Capture tool. When you start a latency test, DWP creates a folder named DWP_Pcaps and begins capturing packets from active adapters. The packet capture stops automatically when the test completes. For more information, see Using DWP Network Packet Capture.

The Latency Tester connects to a default set of web sites, which are identified in the file latcheck.conf.xml. The default set of sites is based on the location of the system you're testing, as described in the following table:

You can modify the latcheck.conf.xml file to add or delete web sites as appropriate for your system. The file is installed with DWP in C:\Program Files\Web Security Service\Desktop Web Proxy\latcheck.conf.xml.

Note: If you modify latcheck.conf.xml, change only the default troubleshooting sites

The Latency Tester reads latcheck.conf.xml and connects twice to each site listed-once directly, and once through the DWP. The tester connects to each set of sites three times, and records the following information:

• The time it takes to connect directly
• The time it takes to connect through the proxy
• The latency difference on each pass
• The average latency difference from the three passes.

The DWPLatencyTest.txt file contains the results of the test.

To use the Latency Tester:

• Hold down the Ctrl key and in the tray, right-click the DWP icon.
• From the pop-up menu, select Latency Test.


The Latency Tester window displays, with the path to your desktop in the Location for Output field.


• Click Start to accept the default folder, or click Browse to go to another folder and then click Start.
  When the test is complete, the output file DWPLatencyTest.txt is available on your desktop or other location you specified.
• Click Send Email to Support in the Latency Tester dialog to send the output file to technical support for help with troubleshooting.
  The Latency Tester opens your default email client using the support email address, and identifies the locations of the results of the latency test and packet capture:

• Attach the DWPLatencyTest.txt and the files in the DWP_Pcaps folder to the email and send them to support.