Skip to Content
Python Programming On Win32
book

Python Programming On Win32

by Andy Robinson, Mark Hammond
January 2000
Intermediate to advanced
672 pages
21h 46m
English
O'Reilly Media, Inc.
Content preview from Python Programming On Win32

Performance Monitor Data from Python

The Python Win32 Extensions include support for providing Performance Monitor information. This support consists of the perfmon module that your application uses to define the counters and provide the counter data. A DLL named perfmondata.dll is supplied as the Performance Monitor DLL; this is the DLL that the Performance Monitor loads to acquire your performance data.

Installing Performance Monitor information

As mentioned previously, it’s necessary to register with the Performance Monitor when your application is installed. To install Performance Monitor information, you must provide the following information:

  • The name of a C header (.h) file providing information about the counters

  • The name of a Windows INI file providing the definitions of the counters

  • The name of the DLL providing Performance Monitor information

This information is necessary only at installation time: the .h and .ini files aren’t required at runtime. The Performance Monitor APIs are very much C and C++ focussed, hence the requirement for the .h file. Often, this .h file would be included in the C/C++ project, but as we are using Python, we need to author a .h file that’s used only for the installation process.

The header file contains #define statements for each counter. Each #define lists the offset of the specific counter in two-byte multiples. The offset zero defines the object itself.

For our sample, we provide two counters, connections per second and the bytes received ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

C++ Windows Programming

C++ Windows Programming

Stefan Bjornander
Learning Python Networking - Second Edition

Learning Python Networking - Second Edition

José Manuel Ortega, Dr. M. O. Faruque Sarker, Sam Washington

Publisher Resources

ISBN: 1565926218Errata Page