Performance and Diagnostics

WPA: Table & Graph Configurations (Part 2)

June 28, 2021 Jun 28, 2021 06/28/21

Tristan Gibeau

In Part 1, we discussed the different types of columns options available in WPA's table views and how those views can be configured. This blog will continue the series by digging into how to configure columns for different graph styles that can show numeric aggregations, time, and hierarchical data: Graphing Overview ...

Setting up an autologger with WPR

June 25, 2021 Jun 25, 2021 06/25/21

Sowoon Pyo

WPR supports configuring an autologger. Setting up the autologger and collecting the autologger trace is as easy as starting/stopping the trace. This article introduces how to start, stop, and cancel the autologger as well as export the autologger registry keys.

Introducing EcoQoS

April 21, 2021 Apr 21, 2021 04/21/21

Raymond Li

EcoQoS is a new Quality of Service (QoS) level introduced to Windows that developers can now opt-in to run their work efficiently, leading to better energy efficiency/increased battery life, reduced fan noise and power/thermal throttling.

WPR fails to start, insufficient system resources?

March 31, 2021 Mar 31, 2021 03/31/21

Sowoon Pyo

From time to time, I get questions about insufficient system resource error (0x800705aa) when starting the trace using WPR. The error can be frustrating, especially when there is enough memory and storage space left on the system. Some people try to solve the issue by increasing the system resources such as killing some apps and services. It ...

Controlling the event session name with the instance name

January 27, 2021 Jan 27, 2021 01/27/21

Sowoon Pyo

In this post, I explained what the session name is in ETW and how to set the session name through WPR with the instancename option.

Windows Performance Analyzer – Table & Graph Configurations (Part 1)

January 15, 2021 Jan 15, 2021 01/15/21

Tristan Gibeau

In the previous post, we discussed a brief intro into Windows Performance Analyzer (WPA) and its feature set.  WPA can display trace data in a wide array of formats, most of which are pre-configured as presets designed for drilling into specific data points. Here is one for example: WPA's CPU Usage (Sampled) table has a few different ...

Authoring Custom Profiles – Part 2

December 10, 2020 Dec 10, 2020 12/10/20

Sowoon Pyo

In this post, we enhance the simple custom profile for WPR by adding the system tracing session. Because kernel events provide critical information about processes, threads, modules, and more, collecting the system events greatly extends your ability to analyze traces and diagnose issues.

Authoring custom profiles – Part 1

November 10, 2020 Nov 10, 2020 11/10/20

Sowoon Pyo

This is the first post in a multi-part series about authoring custom profiles for Windows Performance Recorder (WPR.) In a previous post, we have looked at how to start a trace with built-in profiles. The built-in profiles offer wide variety of preset profiles that we can use for different scenarios. There are built-in profiles for CPU ...

WPR Start and Stop Commands

October 6, 2020 Oct 6, 2020 10/6/20

Sowoon Pyo

In this post, we show how to start and stop the trace using WPR. The first step is doing 'wpr -help start'. The command parameters seems to be cryptic. We explain those parameters in detail with examples.

Windows Performance Analyzer “WPA” Intro

September 29, 2020 Sep 29, 2020 09/29/20

Tristan Gibeau

If you do a search online for WPA, you might find information for protecting your Wi-Fi, but that is a different type of WPA. In the performance & diagnostics space WPA stands for Windows Performance Analyzer, a friendly but intricate UI that allows for developers and analyst to deep dive into performance traces captured on Windows (and...