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« Spy-Keylogger 1.32 Right Click Context Menu Extender 2.0 Easy Picture2Icon 3.0 » Comment Rules & Etiquette - We welcome all comments from our readers, but. When Windows makes a CPU stop executing one thread's code and start executing another thread's code, we call this a context switch. Network radar 2 4 1. A context switch is fairly expensive because the operating system has to: So circa CLR via C# 2.0 lets say we are on Pentium 4 2.4ghz 1 core non-HT, XP. Every 20 milliseconds? The ability to do context switching is an essential component for any multitasking OS. The same type of things that cause context switching in Linux would cause context switching in Windows as well. All a high thread count means is that the CPU will be forced to switch contexts more often to fulfill the processing requirements of the scheduler. Free Hoai Technology Windows Vista/7/8/10 Version 1.0.4.23. Switching between them manually can get old really fast. Audio Output Switcher a a small utility that enable users to easily switch.
-->Beginning with Windows Installer 3.0, it is possible to uninstall some patches from applications. The patch must be an uninstallable patch. When using a Windows Installer version less than version 3.0, removing patches requires uninstalling the patch product and reinstalling the product without applying the patch.
Windows Installer 2.0: Not supported. Patches applied using a version of Windows Installer that is earlier than Windows Installer 3.0 are not uninstallable.
When you invoke an uninstallation of a patch by any of the following methods, the installer attempts to remove the patch from the first product visible to the application or user requesting the uninstallation. The installer searches for patched products in the following order: per-user managed, per-user unmanaged, per-machine.
Uninstalling a patch using MSIPATCHREMOVE on a command line
Privatus 5 0 7 – automated privacy protection. You can uninstall patches from a command by using msiexec.exe and the Command Line Options. The following sample command line removes an uninstallable patch, example.msp, from an application, example.msi, using the MSIPATCHREMOVE property and the /i command line option. When using /i, the patched application can be identified by the path to the application's package (.msi file) or the application's product code. In this example, the application's installation package is located at 'servershareproductsexampleexample.msi' and the application's ProductCode property is '{0C9840E7-7F0B-C648-10F0-4641926FE463}'. The patch package is located at 'servershareproductsexamplepatchesexample.msp' and the patch code GUID is '{EB8C947C-78B2-85A0-644D-86CEEF8E07C0}'.
Msiexec /I {0C9840E7-7F0B-C648-10F0-4641926FE463} MSIPATCHREMOVE={EB8C947C-78B2-85A0-644D-86CEEF8E07C0} /qb
Uninstalling a patch using the standard command line options
Beginning with Windows Installer version 3.0, you can use the standard command line options used by Microsoft Windows Operating System Updates (update.exe) to uninstall Windows Installer patches from a command line.
The following command line is the standard command line equivalent of the Windows Installer command line used to uninstall a patch using the MSIPATCHREMOVE property. The /uninstall option used with the /package option denotes the uninstallation of a patch. The patch can be referenced by the full path to the patch or by the patch code GUID.
Msiexec /package {0C9840E7-7F0B-C648-10F0-4641926FE463} /uninstall {EB8C947C-78B2-85A0-644D-86CEEF8E07C0} /passive
Note
The /passive standard option is not an exact equivalent of the Windows Installer /qb option.
Uninstalling a patch using the RemovePatches method
You can uninstall patches from script by using the Windows Installer Automation Interface. The following scripting sample removes an uninstallable patch, example.msp, from an application, example.msi, using the RemovePatches method of the Installer object. Each patch being uninstalled can be represented by either the full path to the patch package or the patch code GUID. In this example, the application's installation package is located at 'servershareproductsexampleexample.msi' and the application's ProductCode property is '{0C9840E7-7F0B-C648-10F0-4641926FE463}'. The patch package is located at 'servershareproductsexamplepatchesexample.msp' and the patch code GUID is '{EB8C947C-78B2-85A0-644D-86CEEF8E07C0}'.
Uninstalling a patch using Add/Remove Programs
With Windows XP, you can uninstall patches using Add/Remove programs.
Uninstalling a patch using the MsiRemovePatches function
Your applications can uninstall patches from other applications by using the Windows Installer Functions. The following code example removes an uninstallable patch, example.msp, from an application, example.msi, using the MsiRemovePatches function. A patch can be referenced by the full path to the patch package or the patch code GUID. In this example, the application's installation package is located at 'servershareproductsexampleexample.msi' and the application's ProductCode property is '{0C9840E7-7F0B-C648-10F0-4641926FE463}'. The patch package is located at 'servershareproductsexamplepatchesexample.msp' and the patch code GUID is '{EB8C947C-78B2-85A0-644D-86CEEF8E07C0}'.
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Uninstalling a patch from all applications using MsiRemovePatches function
A single patch can update more than one product on the computer. An application can use MsiEnumProductsEx to enumerate all the products on the computer and determine whether a patch has been applied to a particular instance of the product. The application can then uninstall the patch using MsiRemovePatches. For example, a single patch can update multiple products if the patch updates a file in a component that is shared by multiple products and the patch is distributed to update both products.
The following example demonstrates how an application can use the Windows Installer to remove a patch from all applications that are available to the user. It does not remove the patch from applications installed per-user for another user.
Related topics
-->The scheduler maintains a queue of executable threads for each priority level. These are known as ready threads. When a processor becomes available, the system performs a context switch. The steps in a context switch are:
- Save the context of the thread that just finished executing.
- Place the thread that just finished executing at the end of the queue for its priority.
- Find the highest priority queue that contains ready threads.
- Remove the thread at the head of the queue, load its context, and execute it.
The following classes of threads are not ready threads.
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- Threads created with the CREATE_SUSPENDED flag
- Threads halted during execution with the SuspendThread or SwitchToThread function
- Threads waiting for a synchronization object or input.
Until threads that are suspended or blocked become ready to run, the scheduler does not allocate any processor time to them, regardless of their priority.
Contexts 3 4 1 – Fast Window Switcher Installers
The most common reasons for a context switch are:
- The time slice has elapsed.
- A thread with a higher priority has become ready to run.
- A running thread needs to wait.
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When a running thread needs to wait, it relinquishes the remainder of its time slice.