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I have created an application in C++ using MFC, and then one day I have executed this application using Intel VTunes just to monitor the performance of the application and to check where most of the time is consumed by my application. After analyzing I have found that about 40% of the time is consumed by my code and around 35% of the time is consumed by the ntdll.dll file. So, the point here I wants to know is that is this a normal behaviour. I mean is this consumption i.e. 35% of the total time justifiable. Can anyone tell me that which kind of responsibilities resides on ntdll.dll i.e which kind of functionalities is achieved through this dll file, so that I can sort things out in my case and be able to optimize the code.

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Last Post by jbennet
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The ntdll.dll file is a file created by Microsoft that has a description of "NT Layer DLL" and is the file that contains NT kernel functions.

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Can you please elaborate a bit more. In my application (MFC based and there is interaction with databases (Pervasive SQL and SQL Server)), which process will be using the ntdll.dll file etc.

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It depends, if your application is using any kernel functions it may interact with ntdll. You have an executable application, so does it link to any DLL?

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