PERF_COUNTER_DATA structure (perflib.h)

Contains information about the PERF_COUNTER_DATA block that contains the structure. A PERF_COUNTER_DATA block provides raw performance counter data, and consists of the following items in order:

1. A PERF_COUNTER_DATA structure.
2. Raw performance counter data.
3. Padding to make the total size of the block a multiple of eight bytes.

Syntax

typedef struct _PERF_COUNTER_DATA {
  ULONG dwDataSize;
  ULONG dwSize;
} PERF_COUNTER_DATA, *PPERF_COUNTER_DATA;

Members

dwDataSize

The size of the raw performance counter data that follows the PERF_COUNTER_DATA structure in the PERF_COUNTER_DATA block, in bytes.

dwSize

The total size of the PERF_COUNTER_DATA block, which is the sum of the sizes opf the following items:

• The PERF_COUNTER_DATA structure
• The raw performance counter data
• The padding that ensures that the size of the PERF_COUNTER_DATA block is a multiple of 8 bytes

Remarks

The PerfQueryCounterData function returns a PERF_DATA_HEADER block that may contain PERF_COUNTER_DATA blocks directly, or indirectly as part of a PERF_MULTI_INSTANCES block.

Requirements

Requirement	Value
Minimum supported client	Windows 10, version 1607 [desktop apps only]
Minimum supported server	Windows Server 2016 [desktop apps only]
Header	perflib.h

See also

PerfQueryCounterData