// ntddk.h

typedef struct _PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION {
  PPHYSICAL_COUNTER_EVENT_BUFFER_OVERFLOW_HANDLER OverflowHandler;
  ULONG                                           CustomEventBufferEntrySize;
  ULONG                                           EventThreshold;
} PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION, *PPHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION;
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Windows Driver Kit DDI reference (ns-ntddk-physical_counter_event_buffer_configuration)

PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION structure

Description

The PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION structure describes the configuration for event buffers on the platform.

Members

`OverflowHandler`

A pointer to the driver-supplied *PPHYSICAL_COUNTER_EVENT_BUFFER_OVERFLOW_HANDLER routine that will be called when the event buffer entries reach a threshold in the event buffer.

`CustomEventBufferEntrySize`

The size of the event buffer entries, for custom event buffer sizes. Set to zero.

`EventThreshold`

The number of events to be recorded before the OverflowHandler callback routine is invoked. This value is used as a maximum threshold. The actual number of events will depend on the number of actors using event buffer profiling.

Remarks

Most processors have performance monitor units that contain a number of hardware counters for measuring various aspects of system performance. The PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION structure is used within the PHYSICAL_COUNTER_RESOURCE_DESCRIPTOR structure to describe the configuration for event buffer resources.

PHYSICAL_COUNTER_EVENT_BUFFER_CONFIGURATION - NtDoc