公开(公告)号：US10069767B1

公开(公告)日：2018-09-04

申请号：US14928493

申请日：2015-10-30

Applicant: Netronome Systems, Inc.

Inventor： Ron L. Swartzentruber ,  Rick Bouley

IPC: G06F13/40 ,  G06F13/36 ,  G06F13/00 ,  H04L12/861 ,  H04L12/879

Abstract: A method of dynamically allocating buffers involves receiving a packet onto an ingress circuit. The ingress circuit includes a memory that stores a free buffer list, and an allocated buffer list. Packet data of the packet is stored into a buffer. The buffer is associated with a buffer identification (ID). The buffer ID is moved from the free buffer list to the allocated buffer list once the packet data is stored in the buffer. The buffer ID is used to read the packet data from the buffer and into an egress circuit and is stored in a de-allocation buffer list in the egress circuit. A send buffer IDs command is received from a processor onto the egress circuit and instructs the egress circuit to send the buffer ID to the ingress circuit such that the buffer ID is pushed onto the free buffer list.

公开(公告)号：US09866480B1

公开(公告)日：2018-01-09

申请号：US14927455

申请日：2015-10-29

Applicant: Netronome Systems Inc.

Inventor： Hetal S. Borad ,  Gavin J. Stark ,  Ron L. Swartzentruber

IPC: H04L12/743 ,  G06F3/06

CPC classification number: H04L45/7453 ,  G06F3/0613 ,  G06F3/0659 ,  G06F3/067

Abstract: A novel hash range lookup command is disclosed. In an exemplary embodiment, a method includes (a) providing access to a hash table that includes hash buckets having hash entry fields; (b) receiving a novel hash lookup command; (c) using the hash lookup command to determine hash command parameters, a hashed index value, and a flow key value; (d) using the hash command parameters and the hashed index value to generate hash values (addresses) to access entry fields in a selectable number of hash buckets; (e) comparing bits of the entry value in the entry field to bits of the flow key value; (f) repeating (d) through (e) until a match is determined or until the selectable number of hash buckets and entries have been accessed; and (g) returning either an address of the entry field containing the match or a result associated with the entry field containing the match.

公开(公告)号：US09401880B1

公开(公告)日：2016-07-26

申请号：US14588084

申请日：2014-12-31

Applicant: Netronome Systems, Inc.

Inventor： Gavin J. Stark ,  Steven W. Zagorianakos ,  Ron L. Swartzentruber ,  Richard P. Bouley

IPC: H04L12/54 ,  G06F15/80 ,  H04L12/861 ,  H04L12/933 ,  H04L12/801

CPC classification number: H04L49/9047 ,  H04L47/13 ,  H04L49/102 ,  H04L49/9084

Abstract: An island-based network flow processor (IB-NFP) integrated circuit includes islands organized in rows. A configurable mesh event bus extends through the islands and is configured to form a local event ring. The configurable mesh event bus is configured with configuration information received via a configurable mesh control bus. The local event ring involves event ring circuits and event ring segments. In one example, a packet is received onto a first island. If an amount of a processing resource (for example, memory buffer space) available to the first island is below a threshold, then an event packet is communicated from the first island to a second island via the local event ring. In response, the second island causes a third island to communicate via a command/push/pull data bus with the first island, thereby increasing the amount of the processing resource available to the first island for handing incoming packets.