InfiniBand Network Architecture

Chapter 13. WRs, WQEs, and CQEs

The Previous Chapter

The previous chapter provided a detailed description of the verbs used to create a QP, modify its operational characteristics, obtain its current operational characteristics, and destroy it. It provided a detailed description of the creation of a QP and the steps required to program it. The QP state machine was described in detail.

This Chapter

This chapter provides a detailed description of how Work Requests (WRs) are posted to a QP's SQ or RQ, as well as a detailed description of the WR content. Once a WR has been posted to a QP's SQ or RQ, it is referred to as a WQE (Work Queue Entry; pronounced as “wookie”). This chapter describes the ordering rules that govern:

• WQE execution order.

• WQE ...