There’s good news, and there’s bad news. The good news is that the latest Windows Performance Analyzer (WPA), the visualization tool for ETW (Event Tracing for Windows) traces, can now load symbols faster than ever before – it’s multi-threaded, and … Continue reading
A bit over three years ago I wrote about how to use flame graphs to visualize CPU Usage (Sampled) data from ETW, and a year ago I added flame graph support to UIforETW. However these techniques are clumsy and slow … Continue reading
When I run into a problematically slow program I immediately reach for a profiler so that I can understand the problem and either fix it or work around it. This guidance applies even when the slow program is a profiler. … Continue reading
I was looking at an xperf (ETW) trace recently and needed to know who had started a particular process. The parent process ID was stored in the trace so I could find its parent, and its parent’s parent, and so … Continue reading
The 8.1 and above versions of xperf/WPA/WPT comes with a tool called wpaexporter. This tool works as promised and lets you export arbitrary summary tables to .csv files, thus allowing for automated analysis of xperf traces.
Every Windows performance expert should be using xperf traces. My preferred viewer for xperf traces is WPA – Windows Performance Analyzer. However the Windows 8 version of this tool has a few bugs in its display of custom ETW events. … Continue reading
Last year I wrote an article about how to use xperf to analyze a CPU bound program, using the xperfview UI. Since then the WPA UI has come out and replaced xperfview. This updated version of the article explains how … Continue reading