Method and apparatus for caching free memory cell pointers

Details Method and apparatus for caching free memory cell pointers Method and apparatus for caching free memory cell pointers

2005-07-12

2005-07-12

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S003000, C711S118000, C711S156000, C710S054000, C710S056000, C710S057000

Reexamination Certificate

active

06918005

ABSTRACT:
A method and apparatus are provided for caching free cell pointers pointing to memory buffers configured to store data traffic of network connections. In one example, the method stores free cell pointers into a pointer random access memory (RAM). At least one free cell pointer is temporarily stored into internal cache configured to assist in lowering a frequency of reads from and writes to the pointer RAM. A request is received from an external integrated circuit for free cell pointers. Free cell pointers are sent to queues of the external integrated circuit, wherein each free cell pointer in a queue is configured to become a write cell pointer. At least one write cell pointer and a corresponding cell descriptor is received from the external integrated circuit. Free cell pointer counter values are then calculated in order to keep track of the free cell pointers.

REFERENCES:
patent: 6487202 (2002-11-01), Klausmeier et al.
patent: 6549992 (2003-04-01), Armangau et al.
patent: 6618390 (2003-09-01), Erimli et al.
patent: 2002/0194436 (2002-12-01), McKenney

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