Python Win32 Extensions include support for providing Performance
Monitor information. This support consists of the
module that your application uses to
define the counters and provide the counter data. A DLL named
is supplied as the Performance Monitor DLL; this is the DLL that the
Performance Monitor loads to acquire your performance data.
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
each counter. Each
#define lists the offset of the
specific counter in two-byte multiples. The offset zero defines the
For our sample, we provide two counters, connections per second and the bytes received ...