February 2003
Intermediate to advanced
592 pages
11h 47m
English
Content preview from HyperTransport™ System Architecture
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Tunnel Fairness And Forward Progress
Fairness Is Critical In A Point-Point Topology
Because the HyperTransport topology consists of a series of point-point links, the behavior of tunnel devices when forwarding packets on behalf of devices below them is critical. If a very active tunnel was permitted to insert its own packets onto the upstream link and ignore packets from below, flow control buffers would fill up and a bottleneck would result. Figure 11-4 on page 271 depicts a tunnel device inserting packets into the stream it is forwarding towards memory.
Figure 11-4. Tunnel Inserting Packets Into Upstream Traffic
HyperTransPort Imposes A Fairness ...
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