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OID_TCP_RSC_STATISTICS

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As a query, NDIS and overlying drivers or user-mode applications use the OID_TCP_RSC_STATISTICS OID to get the receive-segment coalescing (RSC) statistics of a miniport adapter.

NDIS 6.30 and later miniport drivers that provide RSC services must support this OID. Otherwise, this OID is optional.

Remarks

The InformationBuffer member of NDIS_OID_REQUEST structure contains an NDIS_RSC_STATISTICS_INFO structure.

The miniport driver must maintain the statistics in the members of the NDIS_RSC_STATISTICS_INFO structure as follows:

  • The driver must increment the coalesced packet count in the CoalescedPkts member by one every time a packet is added to a single coalesced unit (SCU).
  • The driver must increment the coalesced octet count in the CoalescedOctets member by the size of the TCP payload of the packet every time a packet is added to a SCU.
  • The driver must increment the coalesced events count CoalesceEvents member by one every time a SCU is finalized. All such SCUs should have a non-zero CoalescedSegCount value.
  • The driver must increment the abort count in the Aborts member by one every time it encounters an exception other than the IP datagram length being exceeded. This count should include the cases where a packet is not coalesced because of hardware resources.

Requirements

Version

Supported for NDIS 6.30 and later drivers in Windows 8.

Header

 Ntddndis.h (include Ndis.h)

See also

NDIS_OID_REQUEST

NDIS_RSC_STATISTICS_INFO