Improve realtime performance with better filtering.

[jenatali]

When calling EnableTraceEx2 with the ENABLE_PROVIDER control code, we have the opportunity to pass an ENABLE_TRACE_PARAMETERS struct. We should do so, and include the EVENT_ENABLE_PROPERTY_IGNORE_KEYWORD_0 flag, along with a filter.

We can provide an EVENT_FILTER_DESCRIPTOR entry with type EVENT_FILTER_TYPE_EVENT_ID. The EVENT_FILTER_EVENT_ID struct that we pass should be filled out with FilterIn set to TRUE, indicating that the events are to be included and not excluded, and the array filled with events that PresentMon knows how to handle.

The Handler struct will need to be extended to include the set of known event IDs, and the AddProvider method will need to be extended as well.

[JeffersonMontgomery-Intel]

Hey Jesse, just fyi I have this implemented and will push once tested/scanned.

It doesn't seem to work when consuming ETL, but I only get used events when capturing realtime. I measured capturing a simple graphics app for 30s and observed 0.6x cpu time.

[jenatali]

That's awesome! Yeah, it's only a property that applies to the producing side, not the consuming side. You should also see reduced CPU overhead from the components producing the ETW, because they should be sending less data.

Thanks for tackling this!

[JeffersonMontgomery-Intel]

Pushed to master. I also made a change where I always use the event metadata and populate it if it's missing, which also has a significant performance benefit.

I'll leave it in master for a bit to give time to shake out any issues, then will create a new versioned release.

[jenatali]

Wow, I'm really impressed by the amount of refactoring and improving that just happened. Great job!