.NET assembly cache / ngen / jit image warm-up and cool-down behavior

Posted by Mike Jiang on Stack Overflow See other posts from Stack Overflow or by Mike Jiang
Published on 2009-09-14T19:23:54Z Indexed on 2010/03/31 9:03 UTC
Read the original article Hit count: 579

Filed under:

gac

|

ngen

|

jit

|

.NET

|

rebasing

Hi,

I have an Input Method (IME) program built with C#.NET 2.0 DLL through C++/CLI. Since an IME is always attaching to another application, the C#.NET DLL seems not able to avoid image address rebasing.

Although I have applied ngen to create a native image of that C#.NET 2.0 DLL and installed it into Global Assembly Cache, it didn't improved much, approximately 12 sec. down to 9 sec. on a slow PIII level PC.

Therefore I uses a small application, which loads all the components referenced by the C#.NET DLL at the boot up time, to "warm up" the native image of that DLL. It works fine to speed up the loading time to 0.5 sec.

However, it only worked for a while. About 30 min. later, it seems to "cool down" again.

Is there any way to control the behavior of GAC or native image to be always "hot"? Is this exactly a image address rebasing problem?

Thank you for your precious time.

Sincerely,

Mike

© Stack Overflow or respective owner

Related posts about gac

To GAC, or not to GAC?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a data access layer (DAL) that is written in ASP.NET 3.5 and uses the Microsoft patterns & practices libraries (hereafter referred to as P&P) in order to accomplish its data access. I installed P&P and it resides in my GAC, so, logically, my DAL references it in the GAC. Therefore… >>> More
Install .NET 4.0 dll to the GAC

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a visual C# 2010 express install. Built a .NET 4.0 dll that is signed. Now I need to get it into the GAC. Im on 64bit vista. Anyone know if there is a gacutil supporting the 4.0 framework yet? Any other suggestions on getting it into the GAC? I have tried drag and drop into C:\Windows\assembly… >>> More
Unable to uninstall an Assembly from GAC?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am unable to uninstall an Assembly (log4net.dll) from GAC. It is giving following error. "Assembly is required by one or more applications". However if I search the Assembly using ProcessExplorer nothing comes up? How can I remove this Assembly from GAC? >>> More
"Official" Way to deploy Assemblies into the GAC?

as seen on Stack Overflow - Search for 'Stack Overflow'
I just wonder - if I need to deploy an assembly into the GAC, what is the "official" way of doing it? Currently we either manually drag/drop into the c:\windows\assembly folder or we use gacutil.exe. The first way is obviously not the good one (it's manual process after all), and gacutil is part… >>> More
GAC locking problem when running deployment

as seen on Server Fault - Search for 'Server Fault'
We have a NANT script that uses msbuild to compile our visual studio solutions and deploys the .dlls into the GAC. This works well on our integration/test servers as part of continuous integration, cruise control uses the NANT scripts and every time the dlls are put into the GAC without problem. On… >>> More

Related posts about ngen

.NET assembly cache / ngen / jit image warm-up and cool-down behavior

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have an Input Method (IME) program built with C#.NET 2.0 DLL through C++/CLI. Since an IME is always attaching to another application, the C#.NET DLL seems not able to avoid image address rebasing. Although I have applied ngen to create a native image of that C#.NET 2.0 DLL and installed it… >>> More
Invoke ngen from NSIS installer

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using NSIS to deploy a .Net application. The installation/uninstallation process works fine, but I would like to add a final ngen step to improve startup performance. Unfortunately, Google didn't reveal any relevant material. It's unlikely that noone has ever done this before - maybe someone… >>> More
bundle .NET dlls to run application in .NET-less machine?

as seen on Stack Overflow - Search for 'Stack Overflow'
AFAIK, ngen turns MSIL into native code (also reffered to as pre-JIT), however I never payed too much attention at it's startup performance impact. Ngen'd applications still require the .NET base class libraries (the runtime). Since the base class libraries have everything our .NET assemblies need… >>> More
ngen.exe is constantly using CPU

as seen on Super User - Search for 'Super User'
I recently installed Windows 7. This was a clean install (i.e. not an upgrade from another version of Windows), but I did install a bunch of other programs. All mainstream applications - nothing wacky. Since then, my CPU usage has been constantly at around 50%. Task Manager shows me that ngen.exe… >>> More
What are these folders in the root of my drive?

as seen on Super User - Search for 'Super User'
The following folders keep showing up: C:\Default\ C:\NativeImages\ They both have a ton of folders in them witha bunch of html files in each folder. I'm assuming this has something to do with NGEN because of the NativeImages folder. How do I get rid of these folders and keep them from coming… >>> More