One of the ways we can look at logging on Windows for any component is with WPP Tracing. This is true for any logs including system components, device drivers, applications, services and any registered trace provider. The trace providers usually are found by their GUID that they register with or that information is extracted from the pdb. The WindowsDDK ships a tool called traceview that can collect and display these traces.
This tool may not be up-to-date on the trace log format but we can easily convert the trace captured in a .etl log file by using eventvwr->open saved log and saving it to the newer format.
Here 's an example of how the logs look like :
00111375 drv 7128 9388 2 111374 02\26\2014-15:59:34:202 Driver::Registry call back: filter out event due to machine or user path set in config. operation = QueryValueKey
The events are displayed we cause we have the formatting for it. This is usually contained in the trace file format maintained by the providers or part of their pdbs. If we don't have the formatting information, the events look something like this:
00111386 Unknown 7128 9388 2 111385 00\00\ 0-00:00:00:00 Unknown( 40): GUID=bbd47d81-a1f8-551f-b37f-8ce988bb02f2 (No Format Information found).
This may not mean that we can use the same fields as we see in TraceView to use with the filters in the event viewer filter. The latter is maintaining its own filter fields, attributes and levels
The event viewer logs have several features.
First off it conforms to a template that's universally recognized. And it identifies events by their source, ids etc.
Second, it can collect a variety of logs, application, system and security. These provide a sink for all the event tracing information on the system. These can be saved and viewed offline.
Third, eventvwr can connect to remote computers and display the events from the logs there.
This is critical when it comes to viewing information across machines.
If our interest is only in filtering certain events, the logman tool can come helpful in filtering events based on provider guid. There are some other options available as well such as to start stop update and delete data collector, to query the data collectors properties and to import or export the XML file.
This tool may not be up-to-date on the trace log format but we can easily convert the trace captured in a .etl log file by using eventvwr->open saved log and saving it to the newer format.
Here 's an example of how the logs look like :
00111375 drv 7128 9388 2 111374 02\26\2014-15:59:34:202 Driver::Registry call back: filter out event due to machine or user path set in config. operation = QueryValueKey
The events are displayed we cause we have the formatting for it. This is usually contained in the trace file format maintained by the providers or part of their pdbs. If we don't have the formatting information, the events look something like this:
00111386 Unknown 7128 9388 2 111385 00\00\ 0-00:00:00:00 Unknown( 40): GUID=bbd47d81-a1f8-551f-b37f-8ce988bb02f2 (No Format Information found).
This may not mean that we can use the same fields as we see in TraceView to use with the filters in the event viewer filter. The latter is maintaining its own filter fields, attributes and levels
The event viewer logs have several features.
First off it conforms to a template that's universally recognized. And it identifies events by their source, ids etc.
Second, it can collect a variety of logs, application, system and security. These provide a sink for all the event tracing information on the system. These can be saved and viewed offline.
Third, eventvwr can connect to remote computers and display the events from the logs there.
This is critical when it comes to viewing information across machines.
If our interest is only in filtering certain events, the logman tool can come helpful in filtering events based on provider guid. There are some other options available as well such as to start stop update and delete data collector, to query the data collectors properties and to import or export the XML file.
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