Oana: Created page with "The purpose of latency determination is to estimate how much time takes for a message to be processed by a Diameter application. The xml_tcp module computes average applicati..."

2016-09-09T14:37:17Z

Created page with "The purpose of latency determination is to estimate how much time takes for a message to be processed by a Diameter application. The xml_tcp module computes average applicati..."

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The purpose of latency determination is to estimate how much time takes for a message to be processed by a Diameter application.

The xml_tcp module computes average application processing latency by handling timestamps from messages exchanged on that connection.
* Each message sent by the module can be timestamped with the server's current time
* Application copies the timestamp from the received XML to the one it responds with
* If the module receives a timestamp it will compute the difference from the current time and adjust average latency

The timestamps need to be enabled in the xml_tcp.conf module. This can be done per Diameter listener

[listener s6a]
type=diameter
...
add-timestamp=yes

If enabled the timestamps are added in their own XML element named timestamp-send:
<m>
<timestamp-send>1377071763411706</timestamp-send>
...
</m>

The application is supposed to copy the received timestamp to the response in a timestamp-recv element:

<m>
<timestamp-recv>1377071763411706</timestamp-recv>
...
</m>

These are exposed through the status of the xml_tcp module.

Diameter Latency determination - Revision history

Oana: Created page with "The purpose of latency determination is to estimate how much time takes for a message to be processed by a Diameter application. The xml_tcp module computes average applicati..."