QoS within the Subnet: SL and VLs
Problem: Port's Transmitter/Receiver Are Shared Resources
Refer to Figure 25-4 on page 619. Software may set up multiple QPs (RC, UC, or UD) and/or multiple EECs (RD) that use the same CA port to send and receive message packets. This obviously creates a resource contention problem.
Figure 25-4. CA Port's Transmitter and Receiver Are Shared Resources
Assume that multiple CA QPs and/or EECs simultaneously need to send (i.e., transmit) packets through the shared port's Link Layer transmit logic. It's obvious that the port can only transmit one packet at a time, so how would it pick which QP/EEC packet to send first, ...
Get InfiniBand Network Architecture now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
