Cisco Technology, Inc.

David Scott Feldman

Michael Brian Galles

Shrijeet Mukherjee

J Bradley Smith

Techniques are provided for zero copy accelerated processing of packets received at a network device according to a session oriented protocol. Each packet comprises a header field and a payload field. Data in the header field of a byte is evaluated to determine whether a sequence number in the header field is equal to an expected sequence number for a given flow of packets. When the sequence number in the header field is equal to the expected sequence number, header data from the header field is stored in a header ring comprising a plurality of socket buffers and payload data is directed to an application buffer pool according to a pointer in a streaming data ring. When the sequence number in the header field is not equal to the expected sequence number, the header data and the payload data are stored in the header ring.

Zero copy acceleration for session oriented protocols

A method includes receiving a first interrupt request from a first device instance of a plurality of device instances. The first interrupt request is requesting an interrupt of a processor. The method also includes updating a bit vector based on the first interrupt request. The bit vector comprises a plurality of bits representing an accumulation of interrupt requests. The method further includes generating a gang interrupt comprising the updated bit vector. The method also includes transmitting the gang interrupt to call a first device driver associated with the first interrupt request based on the bits in the bit vector.

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McMinnville, OR, United States of America

David Scott Feldman