Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Return Value Information:
_MBM evaluation returns a package of the following format:
Package (){
Revision,
WindowSize,
SamplingInterval,
MaximumBandwidth,
AverageBandwidth,
LowBandwidth,
LowNotficationThreshold,
HighNotificationThreshold
}
// Integer
// Integer DWORD
// Integer DWORD
// Integer DWORD
// Integer DWORD
// Integer DWORD
// Integer DWORD
// Integer DWORD
Table 9-261 MBM Package Details
Field Format Description
Revision Integer Current revision is: 0
Window Size Integer
(DWORD)
This field indicates the size of the averaging window (in seconds) that
the platform uses to report average bandwidth.
Sampling Interval
Maximum
Bandwidth
Average Bandwidth
Low Bandwidth
Low Notification
Threshold
High Notification
Threshold
Integer
(DWORD)
Integer
(DWORD)
Integer
(DWORD)
Integer
(DWORD)
Integer
(DWORD)
Integer
(DWORD)
This field indicates the sampling interval (in seconds) that the platform
uses to record bandwidth during the averaging window.
This field indicates the maximum memory bandwidth (in megabytes
per second) for the memory described by this memory device.
This field indicates the moving average memory bandwidth (in
percent) for the averaging window.
This field indicates the lowest memory bandwidth (in percent)
recorded for the averaging window.
The platform to issues a Notify (0x80) on the memory device when the
moving average memory bandwidth value (in percent) falls below the
value indicated by this field.
The platform to issues a Notify (0x81) on the memory device when the
moving average memory bandwidth value (in percent) increases to or
exceeds the value indicated by this field.
9.12.2.2 _MSM (Memory Set Monitoring)
This optional object sets the memory bandwidth monitoring parameters described in Table 9-261.
Arguments: (4)
Arg0 – WindowSize (Integer(DWORD)): indicates the window size in seconds.
Arg1 – SamplingInterval (Integer(DWORD)): indicates the sampling interval in seconds.
Arg2 – LowNotificationThreshold (Integer(DWORD)): indicates the low notification threshold in
percent. Must be = LowNotificationThreshold.
Return Value:
An Integer (DWORD) containing a bit encoded result code as follows:
522 April, 2015 Version 6.0