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.NET Forum / Languages / Managed C++ / May 2004Garbage collector
Hi I wonder... does installing .NET framework may effect the performance of native process running on the same computer Does the GC runs in the kernel or in the application layer? running the GC in the kernel may effect the performance of other 'native' processes while collecting unused memory So.... does the Garbage collection process may effect the performance of process other then the one whos garbage is being collected Nadav. > I wonder... does installing .NET framework may effect > the performance of native process running on the same > computer? No, not if you mean just installing it, without running anything. > Does the GC runs in the kernel or in the application layer? running > the GC in the kernel may effect the performance of other 'native' > processes while collecting unused memory. The processor mode is beside the point. All active applications compete for the user of the processor(s). The only question is to what extent? You find that answer by experimentation. Regards, Will Well, processes ( or actually threads ) running in the kernel have a priority much higher then ones running in the application, this will have a greater affect on the running applications then threads running in the application layer, this is why it is importent for me to understand where the GC runs... > Well, processes ( or actually threads ) running in the kernel > have a priority much higher then ones running in the > application, this will have a greater affect on the running > applications then threads running in the application layer, > ... Huh? On a platform where all threads are created by the kernel, all threads are pre-emptively scheduled by the kernel and just about anyone and his brother can call SetThreadPriority() and SetPriorityClass(), I don't get your point. > this is why it is importent for me to understand where the > GC runs... Then you might want to start reading here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/d otnetgcbasics.asp Regards, Will > Well, processes ( or actually threads ) running in the kernel have a > priority much higher then ones running in the application, this will > have a greater affect on the running applications then threads > running in the application layer, this is why it is importent for me > to understand where the GC runs... Kernel threads CAN have higher priority - they don't necessarily have higher priority (for example, consider the thread(s) of the Idle process). The .NET GC runs as a user-mode thread. Of course, like any other thread, it transitions in and out of the kernel as it does it's work. -cd
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