Article ID: 327540
Article Last Modified on 5/27/2005
APPLIES TO
- Microsoft Windows CE .NET 4.1
This article was previously published under Q327540
SYMPTOMS
After you work with a lot of data in the Windows CE file system (for example, when you copy a large file to the RAM file system), your device may seem to run slowly.
CAUSE
The RAM file system constantly checks for fragmentation of the storage structure that is used to store files, databases, and the registry. The compaction process is CPU-intensive; the process can take a lot of time if there is a lot of fragmentation.
RESOLUTION
A supported software update is now available from Microsoft as Windows CE 4.0 Core OS QFE Q327540. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:
837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products
The English version of this package has the following file attributes or later:
Size File name
-------------------------------------------
346,720 020906_armv4i_wce41-q327540.exe
346,720 020906_armv4t_wce41-q327540.exe
346,720 020906_armv4_wce41-q327540.exe
334,432 020906_mips16_wce41-q327540.exe
350,816 020906_mipsii_fp_wce41-q327540.exe
350,816 020906_mipsii_wce41-q327540.exe
350,816 020906_mipsiv_fp_wce41-q327540.exe
350,816 020906_mipsiv_wce41-q327540.exe
338,528 020906_sh3_wce41-q327540.exe
338,528 020906_sh4_wce41-q327540.exe
322,144 020906_x86_wce41-q327540.exe
The English version of this fix has the file attributes (or later) that are listed in the following table.
Date Time Size File name Platform
---------------------------------------------------------
08-Aug-2002 13:48 182,166 Fsmain.lib armv4\debug
08-Aug-2002 13:48 69,632 Fsmain.pdb armv4\debug
08-Aug-2002 13:48 154,430 Fsmain.lib armv4\retail
08-Aug-2002 13:48 69,632 Fsmain.pdb armv4\retail
08-Aug-2002 13:46 182,438 Fsmain.lib armv4i\debug
08-Aug-2002 13:46 69,632 Fsmain.pdb armv4i\debug
08-Aug-2002 13:46 154,644 Fsmain.lib armv4i\retail
08-Aug-2002 13:46 69,632 Fsmain.pdb armv4i\retail
08-Aug-2002 13:45 174,214 Fsmain.lib armv4t\debug
08-Aug-2002 13:45 69,632 Fsmain.pdb armv4t\debug
08-Aug-2002 13:44 149,414 Fsmain.lib armv4t\retail
08-Aug-2002 13:44 69,632 Fsmain.pdb armv4t\retail
08-Aug-2002 13:52 162,418 Fsmain.lib mips16\debug
08-Aug-2002 13:52 69,632 Fsmain.pdb mips16\debug
08-Aug-2002 13:51 111,986 Fsmain.lib mips16\retail
08-Aug-2002 13:51 69,632 Fsmain.pdb mips16\retail
08-Aug-2002 13:50 197,766 Fsmain.lib mipsii\debug
08-Aug-2002 13:50 69,632 Fsmain.pdb mipsii\debug
08-Aug-2002 13:49 148,812 Fsmain.lib mipsii\retail
08-Aug-2002 13:49 69,632 Fsmain.pdb mipsii\retail
08-Aug-2002 13:53 197,774 Fsmain.lib mipsii_fp\debug
08-Aug-2002 13:53 69,632 Fsmain.pdb mipsii_fp\debug
08-Aug-2002 13:53 148,820 Fsmain.lib mipsii_fp\retail
08-Aug-2002 13:53 69,632 Fsmain.pdb mipsii_fp\retail
08-Aug-2002 02:00 200,176 Fsmain.lib mipsiv\debug
08-Aug-2002 02:00 69,632 Fsmain.pdb mipsiv\debug
08-Aug-2002 13:59 149,874 Fsmain.lib mipsiv\retail
08-Aug-2002 13:59 69,632 Fsmain.pdb mipsiv\retail
08-Aug-2002 13:56 200,184 Fsmain.lib mipsiv_fp\debug
08-Aug-2002 13:56 69,632 Fsmain.pdb mipsiv_fp\debug
08-Aug-2002 13:56 149,882 Fsmain.lib mipsiv_fp\retail
08-Aug-2002 13:56 69,632 Fsmain.pdb mipsiv_fp\retail
08-Aug-2002 13:55 163,080 Fsmain.lib sh3\debug
08-Aug-2002 13:55 69,632 Fsmain.pdb sh3\debug
08-Aug-2002 13:54 125,206 Fsmain.lib sh3\retail
08-Aug-2002 13:54 69,632 Fsmain.pdb sh3\retail
08-Aug-2002 13:58 163,056 Fsmain.lib sh4\debug
08-Aug-2002 13:58 69,632 Fsmain.pdb sh4\debug
08-Aug-2002 13:58 125,168 Fsmain.lib sh4\retail
08-Aug-2002 13:58 69,632 Fsmain.pdb sh4\retail
08-Aug-2002 13:43 148,328 Fsmain.lib x86\debug
08-Aug-2002 13:43 69,632 Fsmain.pdb x86\debug
08-Aug-2002 13:43 103,632 Fsmain.lib x86\retail
08-Aug-2002 13:43 69,632 Fsmain.pdb x86\retail
MORE INFORMATION
With this hotfix you can adjust the priority of the compaction thread so that you can tune the CPU time. These changes to the Windows CE file-system-compaction have no effect unless you add the following registry key to the platform:
HKEY_LOCAL_MACHINE\System\ObjectStore
CompactionPrio256=DWORD:251
The default setting is 251. This is equivalent to typical thread priority. To set the compaction thread to run at idle, set the priority to 255. It is a good idea to set this value between 251 and 255.
If you change the setting, you must reset the device to make the change take effect.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Keywords: kbbug kbfix kbqfe kbenv KB327540
