Xpliant, Inc.

Sridevi Polasanapalli

Tsahi Daniel

Enric Musoll

Dan Tu

A method includes receiving a packet at an ingress node of a network. A hierarchical time stamp is created in the packet by the ingress node. The hierarchical time stamp includes an initial time stamp and an initial node identifier. The packet is passed to another network node, which adds a subsequent time stamp and a subsequent node identifier to the hierarchical time stamp. The packet is received at an egress node of the network. A final time stamp and a final node identifier are added to the hierarchical time stamp at the egress node. The hierarchical time stamp is then removed from the packet and the packet is passed to another network. The hierarchical time stamp is delivered to an analyzer.

Apparatus and method for time stamping packets across several nodes in a network

A packet processor includes a packet memory manager configured to receive a single header reference count and a single payload reference count for a packet. A page link list walk for the header under the control of the header reference count is performed in parallel with a page link list walk for the payload under the control of the payload reference count.

Apparatus and method for optimizing the number of accesses to page-reference count storage in page link list based switches

A packet processor has a packet memory manager configured to store a page walk link list, receive a descriptor and initiate a page walk through the page walk link list in response to the descriptor and without a prompt from transmit direct memory access circuitry. The packet memory manager is configured to receive an indicator of a single page packet and read a new packet in response to the indicator without waiting to obtain page state associated with the page of the single page packet.

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San Jose, CA, United States of America

Sridevi Polasanapalli