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PERF_COUNTER_BLOCK structure (winperf.h)

  • Article

Describes the block of memory that contains the raw performance counter data for an object's counters.

Syntax

typedef struct _PERF_COUNTER_BLOCK {
  DWORD ByteLength;
} PERF_COUNTER_BLOCK, *PPERF_COUNTER_BLOCK;

Members

ByteLength

Size of this structure and the raw counter data that follows, in bytes.

Remarks

The CounterOffset member of PERF_COUNTER_DEFINITION provides the offset from the beginning of this structure to the counter value.

The location of the PERF_COUNTER_BLOCK structure within the PERF_OBJECT_TYPE block depends on if the object contains instances. For details, see Performance Data Format.

You must ensure that the size of the counter block is aligned to an 8-byte boundary. For example, if the performance object includes two DWORD counters, you must add an additional four bytes to the counter block to make it aligned to an 8-byte boundary.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header winperf.h (include Windows.h)

See also

PERF_COUNTER_DEFINITION

PERF_INSTANCE_DEFINITION

PERF_OBJECT_TYPE