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Entry type: FAQ Entry ID: 27153991, Entry date: 07/20/2011
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How do you set the distribution of the processor cores with multi-core computers in WinAC RTX?

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Description
With WinAC RTX, you have the option of influencing the assignment of the processor cores for Dual Core and Multi Core computers. This assignment is done via two modes, "shared mode" and "dedicated mode".

Dedicated mode
One processor core is reserved for processing WinAC RTX. The Windows operating system runs on the remaining available cores (default setting after installation).

Shared mode
No separate core is reserved for WinAC RTX. It runs together with Windows on a processor core.

Note
Current versions of WinAC RTX (from WinAC RTX 2008) no longer support shared mode.

The following figure shows how the processor cores are distributed for the two modes.


( 78 KB )
Fig. 01

The "dedicated mode" is set by default after successful installation of WinAC RTX. If, for example, there are enough resources available on the WinAC RTX core, it is practical to switch to "shared mode" to make more processor performance available to other applications.

Procedure for switching to "shared mode":
 

No. Procedure: Switching to "Shared mode"
1 Open the Explorer and mark drive "C:\".
2 a)

Now find the "boot.ini" file and open it using the "Notepad" text editor.

Note
If the "boot.ini" is not displayed, open the "View" of the Explorer via "Tools -> Folder options".

  • You must remove the check mark for "Hide protected operating files".
  • For "Hidden files and folders", select the "Show hidden files and folders" item.

Then repeat the search procedure.

2 b) Alternatively, you can open the "boot.ini" file as follows.
  1. Open the Windows Control Panel on your desktop by right-clicking on "My Computer > Properties".
  2. Select the "Advanced" tab.
  3. Open the "Settings" of "Startup and Recovery".
  4. Press the "Edit" button. Now you have opened the "boot.ini" file.
3 Search for the item "NUMPROC = X".

Note
The item is at the end of the statement sequence: multi(0)disk(0)rdisk(0)partition(1)\WINNT="BS"

4 Delete the item "NUMPROC = X" and then save the file.

Note
If you cannot save the file, you must remove the file's write protection via the file "Properties"

5 Reboot your computer.

"Shared mode" is now set. Now, unused resources of the WinAC RTX core are also available to Windows.

Procedure for resetting to "dedicated mode":
 

No. Procedure: Switching to "Dedicated mode"
1 Open the Explorer and mark drive "C:\".
2 a) Now find the "boot.ini" file and open it using the "Notepad" text editor.

Note
If the "boot.ini" is not displayed, open the "View" of the Explorer via "Tools -> Folder options".

  • You must remove the check mark for "Hide protected operating files".
  • For "Hidden files and folders", select the "Show hidden files and folders" item.

Then repeat the search procedure.

2 b) Alternatively, you can open the "boot.ini" file as follows.
  1. Open the Windows Control Panel on your desktop by right-clicking on "My Computer > Properties".
  2. Select the "Advanced" tab.
  3. Open the "Settings" of "Startup and Recovery".
  4. Press the "Edit" button. Now you have opened the "boot.ini" file.
3 Add the following statement to the boot option:

"NUMPROC = X"

"X" stands for the number of "processor cores minus 1" (with quad core, e.g.: X=3).

Example of a boot option for WinAC RTX-dedicated mode for Windows 2000 (Dual Core)
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Professional" /fastdetect /NUMPROC=1

Example for Windows XP
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows XP Professional" /fastdetect /NUMPROC=1

4 Save the file.

Note
If you cannot save the file, you must remove the file's write protection via the file "Properties"

5 Reboot your computer.

"Dedicated mode" is now set. WinAC RTX thus runs on a separate processor core. The other cores are available for the operating system and other applications.

More information is available in the RTX Runtime documentation.

Keywords
Performance, Distribution, Loading, Processor distribution