That’s why it’s important to get regular eye exams, particularly as you get older. In fact, many people with dry AMD don’t even know they have it, Khurana says. Wet Macular DegenerationĪbout 80 percent of people with AMD have a form called dry AMD, which typically does not have symptoms, according to the American Academy of Ophthalmology (AAO). Khurana, “they are getting affected more by age-related conditions like AMD.” Dry vs. Khurana, MD, a retina specialist at Northern California Retina Vitreous Associates in Mountain View and an associate clinical professor of ophthalmology at the University of California, San Francisco.ĪMD tends to develop in people who are in their 60s or older. “That number is expected to go up to nearly 5 million in the future, as the population ages,” says Rahul N. Of those, about 2 million have a form called wet AMD, which is a leading cause of vision loss in the United States, according to the National Eye Institute (NEI). About 20 million Americans have this eye condition. The easiest path to something functional is likely create an wpr control file, use wpr to collect the data, and convert it to XML with logman.If you have age-related macular degeneration (AMD), you’re not alone. The OS comes with a basic set of generic PMC counter types, but you can also add CPU specific types either with a registry or as part of the WPR control file.Īll of this is just user-mode code, the kernel mode part is already part of the OS on both 圆4 and ARM64 platforms. There are some hints in the C# sources for the PerfView tool on Github. Using the native ETW control and sink APIs, it should also be possible to create a real-time trace session that consumes the PMC events, although the exact format of the option structures is poorly (or not at all) documented for enabling PMC counters. There are native APIs to decode ETW traces, and there also are some Python libraries. Net class library that can do sophisticated decoding of ETW logs, search for on nuget. ![]() Logman is handy for small traces but causes like a 15:1 expansion of the trace size when converting the binary ETW log to XML, so is not so good for large traces. The OS comes with a tool, logman, that can convert an ETW log file into a XML file, which you can then parse with whatever XML tools you want. You also can have an event written when the PMC counter overflows and set the overflow interval, see the PerfView source code. ![]() A stack walk can also be attached to events which is needed to generate things like flame graphs. For PMC counters, you would specify another event type like a profile timer tick or a thread context switch, and set options to attach your selected PMC counters to those events. Windows comes with a tool called Windows Performance Recorder wpr.exe that takes an XML configuration file (which is documented), and can handle the whole process of getting events into a ETW log file. There are documented APIs and tools to ingest ETW trace files. Typically, you would enable ETW providers and specify the OS write the event data to either a memory buffer or file. This support is in the form of a kernel ETW event provider. The Windows kernel has built-in support to collect core PMC counters.
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