Debugging ETW Event Drops in High-Throughput Applications

I was working on a production application recently where we rely heavily on ETW (Event Tracing for Windows) to emit high-frequency events. We are talking about millions of events every few seconds. We started noticing gaps in our telemetry—we were running into event drops. This was a critical issue. If you are losing events, you are flying blind. I had to figure out which provider was producing the most events and where the bottleneck was.