Performance
Data Format
The format of
the data retrieved by the RegQueryValueEx function begins with a single header
structure, PERF_DATA_BLOCK.
The PERF_DATA_BLOCK structure describes the system and the performance
data. The PERF_DATA_BLOCK structure is followed by a list of object
information blocks (one per object).
|
PERF_DATA_BLOCK |
|
Object 1
information |
|
Object 2
information |
|
Object 3
information |
|
|
|
Object X
information |
Basic
Performance Data Structure
Each object
information block contains a PERF_OBJECT_TYPE262F_HJ structure, which describes the
performance data for the object. The PERF_OBJECT_TYPE structure is
followed by a list of PERF_COUNTER_DEFINITION20YXHX8 structures, one for each counter defined
for the object. For an object with only one instance, the list of PERF_COUNTER_DEFINITION
structures is followed by a single PERF_COUNTER_BLOCK structure, followed by the
data for each counter.
|
PERF_OBJECT_TYPE |
|
PERF_COUNTER_DEFINITION 1 |
|
PERF_COUNTER_DEFINITION 2 |
|
PERF_COUNTER_DEFINITION 3 |
|
|
|
PERF_COUNTER_DEFINITION Y |
|
PERF_COUNTER_BLOCK |
|
Counter 1
data |
|
Counter 2
data |
|
Counter 3
data |
|
|
|
Counter Y
data |
Structure
of Object Information Block (One Instance)
For an object
type that supports multiple instances, the list of PERF_COUNTER_DEFINITION structures is followed by
a list of instance information blocks (one for each instance).
|
PERF_OBJECT_TYPE |
|
PERF_COUNTER_DEFINITION 1 |
|
PERF_COUNTER_DEFINITION 2 |
|
PERF_COUNTER_DEFINITION 3 |
|
|
|
PERF_COUNTER_DEFINITION Y |
|
Instance 1
Information |
|
Instance 2
Information |
|
Instance 3
Information |
|
|
|
Instance Z Information
|
Structure
of Object Information Block (Multiple Instances)
Each instance
information block contains a PERF_INSTANCE_DEFINITION structure and a PERF_COUNTER_BLOCK structure.
|
PERF_INSTANCE_DEFINITION |
|
Instance
name |
|
PERF_COUNTER_BLOCK |
|
Counter Data
1 |
|
Counter Data
2 |
|
Counter Data
3 |
|
|
|
Counter Data
Y |
Structure
of Instance Information Block