Patent application number | Description | Published |
20080250116 | METHOD AND APPARATUS FOR REDUCING POOL STARVATION IN A SHARED MEMORY SWITCH - Reducing pool starvation in a switch is disclosed. The switch includes a plurality of egress ports, and a reserved pool of buffers in a shared memory. The reserved pool of buffers is one of a number of reserved pools of buffers, and the reserved pool of buffers is reserved for one of the egress ports. A shared pool of buffers and a multicast pool of buffers are in the shared memory. The shared pool of buffers is shared by the egress ports. | 10-09-2008 |
20100049870 | DENSE MODE CODING SCHEME - A lookup table for searching for a longest prefix match for a key is disclosed. The lookup table provides a match for a key in a single search cycle. The number of matches stored in the lookup table is maximized by storing each match in only one location in the lookup table. The binary tree is divided into a plurality of levels and each level has a plurality of subtrees. A subtree descriptor stored for a subtree includes a field for each node in the subtree. The state of the field indicates whether an entry for the node is stored in the table. The bit vector allows indexing of the single match stored for the key. | 02-25-2010 |
20100250699 | METHOD AND APPARATUS FOR REDUCING POOL STARVATION IN A SHARED MEMORY SWITCH - A switch includes a reserved pool of buffers in a shared memory. The reserved pool of buffers is reserved for exclusive use by an egress port. The switch includes pool select logic which selects a free buffer from the reserved pool for storing data received from an ingress port to be forwarded to the egress port. The shared memory also includes a shared pool of buffers. The shared pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the shared pool upon detecting no free buffer in the reserved pool. The shared memory may also include a multicast pool of buffers. The multicast pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the multicast pool upon detecting an IP Multicast data packet received from an ingress port. | 09-30-2010 |
20110019546 | CONGESTION MANAGEMENT IN A NETWORK - Management of congestion level, in a computer-related context, is disclosed. Also disclosed is a system generating a plurality of computer network-related tables during system operation. A number of the tables are each separately indexed by a different index. The system includes at least one tangible computer-readable medium adapted to store, at each indexed location, a swap count providing an indication of the congestion level of the indexed location. The system also includes insert logic stored as instructions on the at least one medium for execution. When executed, the insert logic is operable to: i) insert, when a predetermined condition has been satisfied, a new entry by overwriting the current entry stored in the indexed location having the lowest swap count; and ii) update the swap counts in each of the indexed locations in a manner that maintains the total swap count at least substantially constant over time. | 01-27-2011 |
20110082866 | METHOD AND APPARATUS FOR LOGICALLY EXPANDING THE LENGTH OF A SEARCH KEY - A lookup table provides a longest prefix match for a search key longer than a lookup table's mapper key. The lookup table performs a multi-level search in one or more mappers for the result value based on a portion of the search key provided as the mapper key. The lookup table is searched in multiple passes with successive portions of the search key until the result value is found. | 04-07-2011 |
20110286455 | METHOD AND APPARATUS FOR REDUCING POOL STARVATION IN A SHARED MEMORY SWITCH - A switch includes a reserved pool of buffers in a shared memory. The reserved pool of buffers is reserved for exclusive use by an egress port. The switch includes pool select logic which selects a free buffer from the reserved pool for storing data received from an ingress port to be forwarded to the egress port. The shared memory also includes a shared pool of buffers. The shared pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the shared pool upon detecting no free buffer in the reserved pool. The shared memory may also include a multicast pool of buffers. The multicast pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the multicast pool upon detecting an IP Multicast data packet received from an ingress port. | 11-24-2011 |
20110317704 | DENSE MODE CODING SCHEME - A lookup table for searching for a longest prefix match for a key is disclosed. The lookup table provides a match for a key in a single search cycle. The number of matches stored in the lookup table is maximized by storing each match in only one location in the lookup table. The binary tree is divided into a plurality of levels and each level has a plurality of subtrees. A subtree descriptor stored for a subtree includes a field for each node in the subtree. The state of the field indicates whether an entry for the node is stored in the table. The bit vector allows indexing of the single match stored for the key. | 12-29-2011 |
20140092743 | METHOD AND APPARATUS FOR REDUCING POOL STARVATION IN A SHARED MEMORY SWITCH - A switch includes a reserved pool of buffers in a shared memory. The reserved pool of buffers is reserved for exclusive use by an egress port. The switch includes pool select logic which selects a free buffer from the reserved pool for storing data received from an ingress port to be forwarded to the egress port. The shared memory also includes a shared pool of buffers. The shared pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the shared pool upon detecting no free buffer in the reserved pool. The shared memory may also include a multicast pool of buffers. The multicast pool of buffers is shared by a plurality of egress ports. The pool select logic selects a free buffer in the multicast pool upon detecting an IP Multicast data packet received from an ingress port. | 04-03-2014 |