// storport.h

typedef struct _STARTIO_PERFORMANCE_PARAMETERS {
  ULONG Version;
  ULONG Size;
  ULONG MessageNumber;
  ULONG ChannelNumber;
} STARTIO_PERFORMANCE_PARAMETERS, *PSTARTIO_PERFORMANCE_PARAMETERS;
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Windows Driver Kit DDI reference (ns-storport-_startio_performance_parameters)

_STARTIO_PERFORMANCE_PARAMETERS structure

Description

The STARTIO_PERFORMANCE_PARAMETERS structure describes the performance parameters that are returned to the miniport driver by the StorPortGetStartIoPerfParams routine.

Members

`Version`

The version number of the structure. This member is valid starting with Windows 8.

`Size`

The size of the structure.

`MessageNumber`

The offset in the device's MSI-X table for the optimal MSI-X message with which to interrupt. If the device does not support MSI-X messages, this member will be zero.

`ChannelNumber`

Denotes the concurrent channel in which Storport is passing the I/O. If the miniport driver did not set up concurrent channels, this member will be zero.

STARTIO_PERFORMANCE_PARAMETERS - NtDoc