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Win32_CacheMemory class

The Win32_CacheMemory WMI class represents internal and external cache memory on a computer system.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[Provider("CIMWin32")]class Win32_CacheMemory : CIM_CacheMemory
{
  uint16   Access;
  uint8    AdditionalErrorData[];
  uint16   Associativity;
  uint16   Availability;
  uint64   BlockSize;
  uint32   CacheSpeed;
  uint16   CacheType;
  string   Caption;
  uint32   ConfigManagerErrorCode;
  boolean  ConfigManagerUserConfig;
  boolean  CorrectableError;
  string   CreationClassName;
  uint16   CurrentSRAM[];
  string   Description;
  string   DeviceID;
  uint64   EndingAddress;
  uint16   ErrorAccess;
  uint64   ErrorAddress;
  boolean  ErrorCleared;
  uint16   ErrorCorrectType;
  uint8    ErrorData[];
  uint16   ErrorDataOrder;
  string   ErrorDescription;
  uint16   ErrorInfo;
  string   ErrorMethodology;
  uint64   ErrorResolution;
  datetime ErrorTime;
  uint32   ErrorTransferSize;
  uint32   FlushTimer;
  datetime InstallDate;
  uint32   InstalledSize;
  uint32   LastErrorCode;
  uint16   Level;
  uint32   LineSize;
  uint16   Location;
  uint32   MaxCacheSize;
  string   Name;
  uint64   NumberOfBlocks;
  string   OtherErrorDescription;
  string   PNPDeviceID;
  uint16   PowerManagementCapabilities[];
  boolean  PowerManagementSupported;
  string   Purpose;
  uint16   ReadPolicy;
  uint16   ReplacementPolicy;
  uint64   StartingAddress;
  string   Status;
  uint16   StatusInfo;
  uint16   SupportedSRAM[];
  string   SystemCreationClassName;
  boolean  SystemLevelAddress;
  string   SystemName;
  uint16   WritePolicy;
};

Members

The Win32_CacheMemory class has these types of members:

Methods

The Win32_CacheMemory class has these methods.

MethodDescription
Reset

Not implemented. To implement this method, see the Reset method in CIM_CacheMemory for documentation.

SetPowerState

Not implemented. To implement this method, see the SetPowerState method in CIM_CacheMemory for documentation.

 

Properties

The Win32_CacheMemory class has these properties.

Access
Data type: uint16
Access type: Read-only

Type of access. This property is inherited from CIM_StorageExtent.

ValueMeaning
0

Unknown

1

Readable

2

Writable

3

Read/Write Supported

4

Windows Server 2003:  Write Once

 

AdditionalErrorData
Data type: uint8 array
Access type: Read-only

Array of octets that hold additional error information. An example is ECC Syndrome or the return of the check bits if a CRC-based error methodology is used. In the latter case, if a single-bit error is recognized and the CRC algorithm is known, it is possible to determine the exact bit that failed. This type of data (ECC Syndrome, Check Bit, Parity Bit data, or other vendor supplied information) is included in this field. If the ErrorInfo property is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

Associativity
Data type: uint16
Access type: Read-only

An integer enumeration that defines the system cache associativity. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Direct Mapped

4

2-way Set-Associative

5

4-way Set-Associative

6

Fully Associative

7

Windows Server 2003:  8-way Set-Associative

8

Windows Server 2003:  16-way Set-Associative

 

Availability
Data type: uint16
Access type: Read-only

Availability and status of the device. Inherited from CIM_LogicalDevice.

ValueMeaning
1 (0x1)

Other

2 (0x2)

Unknown

3 (0x3)

Running or Full Power

4 (0x4)

Warning

5 (0x5)

In Test

6 (0x6)

Not Applicable

7 (0x7)

Power Off

8 (0x8)

Off Line

9 (0x9)

Off Duty

10 (0xA)

Degraded

11 (0xB)

Not Installed

12 (0xC)

Install Error

13 (0xD)

Power Save - Unknown

The device is known to be in a power save mode, but its exact status is unknown.

14 (0xE)

Power Save - Low Power Mode

The device is in a power save state but still functioning, and may exhibit degraded performance.

15 (0xF)

Power Save - Standby

The device is not functioning, but could be brought to full power quickly.

16 (0x10)

Power Cycle

17 (0x11)

Power Save - Warning

The device is in a warning state, though also in a power save mode.

 

BlockSize
Data type: uint64
Access type: Read-only

Size in bytes of the blocks that form this storage extent. If unknown or if a block concept is not valid (for example, for aggregate extents, memory, or logical disks), enter a 1. This property is inherited from CIM_StorageExtent.

For more information about using uint64 values in scripts, see Scripting in WMI.

CacheSpeed
Data type: uint32
Access type: Read-only
Qualifiers: Units (NanoSeconds)

Speed of the cache.

CacheType
Data type: uint16
Access type: Read-only

Type of cache. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Instruction

4

Data

5

Unified

 

Caption
Data type: string
Access type: Read-only

Short description of the object—a one-line string. This property is inherited from CIM_ManagedSystemElement.

ConfigManagerErrorCode
Data type: uint32
Access type: Read-only

Win32 Configuration Manager error code.

ValueMeaning
0 (0x0)

Device is working properly.

1 (0x1)

Device is not configured correctly.

2 (0x2)

Windows cannot load the driver for this device.

3 (0x3)

Driver for this device might be corrupted, or the system may be low on memory or other resources.

4 (0x4)

Device is not working properly. One of its drivers or the registry might be corrupted.

5 (0x5)

Driver for the device requires a resource that Windows cannot manage.

6 (0x6)

Boot configuration for the device conflicts with other devices.

7 (0x7)

Cannot filter.

8 (0x8)

Driver loader for the device is missing.

9 (0x9)

Device is not working properly. The controlling firmware is incorrectly reporting the resources for the device.

10 (0xA)

Device cannot start.

11 (0xB)

Device failed.

12 (0xC)

Device cannot find enough free resources to use.

13 (0xD)

Windows cannot verify the device's resources.

14 (0xE)

Device cannot work properly until the computer is restarted.

15 (0xF)

Device is not working properly due to a possible re-enumeration problem.

16 (0x10)

Windows cannot identify all of the resources that the device uses.

17 (0x11)

Device is requesting an unknown resource type.

18 (0x12)

Device drivers must be reinstalled.

19 (0x13)

Failure using the VxD loader.

20 (0x14)

Registry might be corrupted.

21 (0x15)

System failure. If changing the device driver is ineffective, see the hardware documentation. Windows is removing the device.

22 (0x16)

Device is disabled.

23 (0x17)

System failure. If changing the device driver is ineffective, see the hardware documentation.

24 (0x18)

Device is not present, not working properly, or does not have all of its drivers installed.

25 (0x19)

Windows is still setting up the device.

26 (0x1A)

Windows is still setting up the device.

27 (0x1B)

Device does not have valid log configuration.

28 (0x1C)

Device drivers are not installed.

29 (0x1D)

Device is disabled. The device firmware did not provide the required resources.

30 (0x1E)

Device is using an IRQ resource that another device is using.

31 (0x1F)

Device is not working properly. Windows cannot load the required device drivers.

 

ConfigManagerUserConfig
Data type: boolean
Access type: Read-only

If True, the device is using a user-defined configuration. This property is inherited from CIM_LogicalDevice.

CorrectableError
Data type: boolean
Access type: Read-only

If True, the most recent error was correctable. If the ErrorInfo property is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

CreationClassName
Data type: string
Access type: Read-only
Qualifiers: Key, MaxLen (256)

Name of the first concrete class to appear in the inheritance chain used in the creation of an instance. When used with the other key properties of the class, the property allows all instances of this class and its subclasses to be uniquely identified. This property is inherited from CIM_LogicalDevice.

CurrentSRAM
Data type: uint16 array
Access type: Read-only

Array of types of Static Random Access Memory (SRAM) being used for the cache memory.

ValueMeaning
0

Other

1

Unknown

2

Non-Burst

3

Burst

4

Pipeline Burst

5

Synchronous

6

Asynchronous

 

Description
Data type: string
Access type: Read-only

Description of the object. This property is inherited from CIM_ManagedSystemElement.

DeviceID
Data type: string
Access type: Read-only
Qualifiers: Key

Unique identifier of the cache represented by an instance of Win32_CacheMemory. This property is inherited from CIM_LogicalDevice.

Example: "Cache Memory 1"

EndingAddress
Data type: uint64
Access type: Read-only

Ending address, referenced by an application or operating system and mapped by a memory controller, for this memory object. The ending address is specified in kilobytes. This property is inherited from CIM_Memory.

For more information about using uint64 values in scripts, see Scripting in WMI.

ErrorAccess
Data type: uint16
Access type: Read-only

Memory access operation that caused the last error. The type of error is described by the ErrorInfo property. If ErrorInfo is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

ValueMeaning
1

Other

2

Unknown

3

Read

4

Write

5

Partial Write

 

ErrorAddress
Data type: uint64
Access type: Read-only

Address of the last memory error. The type of error is described by the ErrorInfo property. If ErrorInfo is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

For more information about using uint64 values in scripts, see Scripting in WMI.

ErrorCleared
Data type: boolean
Access type: Read-only

If True, the error reported in LastErrorCode is now cleared. This property is inherited from CIM_LogicalDevice.

ErrorCorrectType
Data type: uint16
Access type: Read-only

Error correction method used by the cache memory.

ValueMeaning
0

Reserved

1

Other

2

Unknown

3

None

4

Parity

5

Single-Bit ECC

6

Multi-Bit ECC

 

ErrorData
Data type: uint8 array
Access type: Read-only

Array of data captured during the last erroneous memory access. The data occupies the first n octets of the array necessary to hold the number of bits specified by the ErrorTransferSize property. If ErrorTransferSize is 0 (zero), then this property has no meaning. This property is inherited from CIM_Memory.

ErrorDataOrder
Data type: uint16
Access type: Read-only

Ordering for data stored in the ErrorData property. If ErrorTransferSize is 0 (zero), then this property has no meaning. This property is inherited from CIM_Memory.

ValueMeaning
0

Unknown

1

Least Significant Byte First

2

Most Significant Byte First

 

ErrorDescription
Data type: string
Access type: Read-only

More information about the error recorded in LastErrorCode, and information on any corrective actions that may be taken. This property is inherited from CIM_LogicalDevice.

ErrorInfo
Data type: uint16
Access type: Read-only

Type of error that occurred most recently. The values 12-14 are undefined in the CIM schema because in DMI they mix the semantics of the type of error and whether it was correctable or not. The latter is indicated in the property CorrectableError. This property is inherited from CIM_Memory.

ValueMeaning
1

Other

2

Unknown

3

OK

4

Bad Read

5

Parity Error

6

Single-Bit Error

7

Double-Bit Error

8

Multi-Bit Error

9

Nibble Error

10

Checksum Error

11

CRC Error

12

Undefined

13

Undefined

14

Undefined

 

ErrorMethodology
Data type: string
Access type: Read-only

Details on the parity or CRC algorithms, ECC, or other mechanisms used. This property is inherited from CIM_Memory.

ErrorResolution
Data type: uint64
Access type: Read-only

Range, in bytes, to which the last error can be resolved. For example, if error addresses are resolved to bit 11 (that is, on a typical page basis), then errors can be resolved to 4 KB boundaries and this property is set to 4000. If the ErrorInfo property is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

For more information about using uint64 values in scripts, see Scripting in WMI.

ErrorTime
Data type: datetime
Access type: Read-only

Time that the last memory error occurred. The type of error is described by the ErrorInfo property. If the ErrorInfo property is equal to 3 (OK), then this property has no meaning. This property is inherited from CIM_Memory.

ErrorTransferSize
Data type: uint32
Access type: Read-only

Size of the data transfer in bits that caused the last error. 0 (zero) indicates no error. If the ErrorInfo property is equal to 3 (OK), then this property should be set to 0 (zero). This property is inherited from CIM_Memory.

FlushTimer
Data type: uint32
Access type: Read-only

Maximum amount of time, in seconds, dirty lines or buckets may remain in the cache before they are flushed. A value of 0 (zero) indicates that a cache flush is not controlled by a flushing timer. This property is inherited from CIM_CacheMemory.

InstallDate
Data type: datetime
Access type: Read-only

Date and time the object was installed. This property does not need a value to indicate that the object is installed. This property is inherited from CIM_ManagedSystemElement.

InstalledSize
Data type: uint32
Access type: Read-only
Qualifiers: Units (Kilobytes)

Current size of the installed cache memory.

LastErrorCode
Data type: uint32
Access type: Read-only

Last error code reported by the logical device. This property is inherited from CIM_LogicalDevice.

Level
Data type: uint16
Access type: Read-only

Level of the cache. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Primary

4

Secondary

5

Tertiary

6

Windows Server 2003:  Not Applicable

 

LineSize
Data type: uint32
Access type: Read-only

Size, in bytes, of a single cache bucket or line. This property is inherited from CIM_CacheMemory.

Location
Data type: uint16
Access type: Read-only

Physical location of the cache memory.

ValueMeaning
0

Internal

1

External

2

Reserved

3

Unknown

 

MaxCacheSize
Data type: uint32
Access type: Read-only
Qualifiers: Units (Kilobytes)

Maximum cache size installable to this particular cache memory.

Name
Data type: string
Access type: Read-only

Label by which the object is known. When subclassed, the property can be overridden to be a key property. This property is inherited from CIM_ManagedSystemElement.

NumberOfBlocks
Data type: uint64
Access type: Read-only

Total number of consecutive blocks, each block the size of the value contained in the BlockSize property, which form this storage extent. Total size of the storage extent can be calculated by multiplying the value of the BlockSize property by the value of this property. If the value of BlockSize is 1, this property is the total size of the storage extent. This property is inherited from CIM_StorageExtent.

For more information about using uint64 values in scripts, see Scripting in WMI.

OtherErrorDescription
Data type: string
Access type: Read-only

Free-form string providing more information if the ErrorType property is set to 1, Other. Otherwise, this string has no meaning. This property is inherited from CIM_Memory.

PNPDeviceID
Data type: string
Access type: Read-only

Windows Plug and Play device identifier of the logical device. This property is inherited from CIM_LogicalDevice.

Example: "*PNP030b"

PowerManagementCapabilities
Data type: uint16 array
Access type: Read-only

Array of the specific power-related capabilities of a logical device. This property is inherited from CIM_LogicalDevice.

ValueMeaning
0 (0x0)

Unknown

1 (0x1)

Not Supported

2 (0x2)

Disabled

3 (0x3)

Enabled

The power management features are currently enabled but the exact feature set is unknown or the information is unavailable.

4 (0x4)

Power Saving Modes Entered Automatically

The device can change its power state based on usage or other criteria.

5 (0x5)

Power State Settable

The SetPowerState method is supported. This method is found on the parent CIM_LogicalDevice class and can be implemented. For more information, see Designing Managed Object Format (MOF) Classes.

6 (0x6)

Power Cycling Supported

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle).

7 (0x7)

Timed Power-On Supported

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle) and Time set to a specific date and time, or interval, for power-on.

 

PowerManagementSupported
Data type: boolean
Access type: Read-only

If True, the device can be power-managed (can be put into suspend mode, and so on). The property does not indicate that power management features are currently enabled, only that the logical device is capable of power management. This property is inherited from CIM_LogicalDevice.

Purpose
Data type: string
Access type: Read-only

Free-form string describing the media and its use. This property is inherited from CIM_StorageExtent.

ReadPolicy
Data type: uint16
Access type: Read-only

Policy that shall be employed by the cache for handling read requests. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Read

4

Read-Ahead

5

Read and Read-Ahead

6

Windows Server 2003:  Determination Per I/O

 

ReplacementPolicy
Data type: uint16
Access type: Read-only

Algorithm to determine which cache lines or buckets should be reused. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Least Recently Used (LRU)

4

First In First Out (FIFO)

5

Last In First Out (LIFO)

6

Least Frequently Used (LFU)

7

Most Frequently Used (MFU)

8

Windows Server 2003:  Data Dependent Multiple Algorithms

 

StartingAddress
Data type: uint64
Access type: Read-only

Beginning address, referenced by an application or operating system and mapped by a memory controller, for this memory object. The starting address is specified in kilobytes. This property is inherited from CIM_Memory.

For more information about using uint64 values in scripts, see Scripting in WMI.

Status
Data type: string
Access type: Read-only

Current status of the object. Various operational and nonoperational statuses can be defined. Operational statuses include: "OK", "Degraded", and "Pred Fail" (an element, such as a SMART-enabled hard disk drive, may be functioning properly but predicting a failure in the near future). Nonoperational statuses include: "Error", "Starting", "Stopping", and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is online, yet the managed element is neither "OK" nor in one of the other states. This property is inherited from CIM_ManagedSystemElement.

The values are:

"OK"
"Error"
"Degraded"
"Unknown"
"Pred Fail"
"Starting"
"Stopping"
"Service"
"Stressed"
"NonRecover"
"No contact"
"Lost Comm"
StatusInfo
Data type: uint16
Access type: Read-only

State of the logical device. If this property does not apply to the logical device, the value 5 (Not Applicable) should be used. This property is inherited from CIM_LogicalDevice.

ValueMeaning
1 (0x1)

Other

2 (0x2)

Unknown

3 (0x3)

Enabled

4 (0x4)

Disabled

5 (0x5)

Not Applicable

 

SupportedSRAM
Data type: uint16 array
Access type: Read-only

Array of supported types of Static Random Access Memory (SRAM) that can be used for the cache memory.

ValueMeaning
0

Other

1

Unknown

2

Non-Burst

3

Burst

4

Pipeline Burst

5

Synchronous

6

Asynchronous

 

SystemCreationClassName
Data type: string
Access type: Read-only

Value of the scoping computer's CreationClassName property. This property is inherited from CIM_LogicalDevice.

SystemLevelAddress
Data type: boolean
Access type: Read-only

If True, the address information in the property ErrorAddress is a system-level address. If False, it is a physical address. If the ErrorInfo property is equal to 3, then this property has no meaning. This property is inherited from CIM_Memory.

SystemName
Data type: string
Access type: Read-only

Name of the scoping system. This property is inherited from CIM_LogicalDevice.

WritePolicy
Data type: uint16
Access type: Read-only

Write policy definition. This property is inherited from CIM_CacheMemory.

ValueMeaning
1

Other

2

Unknown

3

Write Back

4

Write Through

5

Varies with Address

6

Windows Server 2003:  Determination Per I/O

 

Remarks

The Win32_CacheMemory class is derived from CIM_CacheMemory.

Requirements

Minimum supported client

Windows Vista

Minimum supported server

Windows Server 2003

Namespace

\root\CIMV2

MOF

CIMWin32.mof

DLL

CIMWin32.dll

See also

Computer System Hardware Classes

 

 

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