Motorola Corporation

Freescale Semiconductor,inc.

Jaksa Djordjevic

Howard E Levin

James Joseph Kosmach

Arup Chakraborty

Methods and systems are disclosed for adaptive scheduling queue control based upon page hit distance determinations. A threshold occupancy value is determined for a window of previous access requests to a memory and used to adaptively control a number of access requests stored in a scheduling queue buffer. For certain embodiments, a page hit distance (PHD) determination for each access request and historical page hit distance data is used to adjust the threshold occupancy value that determines the number (N) of access requests stored in the buffer prior to removing an access request and using it to access the memory. For each access request, the page hit distance represents the number of previously received access requests since the last access request to access the same page of memory. An average PHD can be determined over a number (M) of previous access requests and used to control the threshold occupancy value.

Adaptive scheduling queue control for memory controllers based upon page hit distance determinations

Coding gain is used to configure a communication system using a programmable error correction scheme. A best available error correction configuration is selected from among several configurations to provide an optimal coding gain performance for a given line or set of line characteristics and a given communication system. Payload is calculated for each of several error correction configurations, and the configuration providing the highest payload for a target bit error rate is selected. Use of gross gain to configure the communication system further provides an optimal configuration.

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Austin, TX, United States of America

Jaksa Djordjevic