Analyze Logged Messages

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After you deploy and start an application on a Linux target, you can view both system and application-generated log messages in the Log Viewer panel of the Linux Runtime Manager. To deploy and start an application, see Build Simulink Model and Deploy Application and Manage Deployed Applications.

Each logged message contains the following fields:

Timestamp

Time when the message was logged.

AppId

Unique identifier of the application that generated the message.

CtxId

Context identifier of the message. A single application can have multiple contexts.

Type

Severity level of the message, listed from highest to lowest severity: Fatal, Error, Warn, Info, Debug, Verbose.

Message

Text content of the log message.

View Log Messages in Linux Runtime Manager

The Log Viewer panel displays log messages from all running applications on the connected target. To filter the messages, select values from the drop-down lists in the Filter by column to narrow the displayed messages by application, context, or severity level.

Log viewer window.

Access Log Messages Programmatically

You can also retrieve and filter log messages from the MATLAB command line by using the linux.LogMessages object.

Create a log messages object by specifying the target name:

logObj = linux.LogMessages("myTarget");

Retrieve messages by using the linux.LogMessages.get method with one or more filter criteria:

msgs = logObj.get('MessageFilter', "error occurred", 'AppIdFilter', ...
    "myApp", 'CtxIdFilter', "CTRL", 'SeverityFilter', "Error")

You can also apply individual filters. To filter messages by application identifier:

msgs_appName = logObj.get('AppIdFilter', "myApp");

To filter messages by application identifier and context identifier:

msgs_ctx = logObj.get('AppIdFilter', "myApp", 'CtxIdFilter', "CTRL");

To filter messages by severity level:

msgs_severity = logObj.get('SeverityFilter', "Warn");

See Also

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