Command rate configuration in data processing system

Patent metadata

Field	Value
Publication number	US-9251111-B2
Application number	US-201314136818-A
Country	US
Kind code	B2
Filing date	Dec 20, 2013
Priority date	Dec 20, 2013
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

In one or more embodiments, one or more systems, devices, methods, and/or processes described can continually increase a command rate of an interconnect if one or more requests to lower the command rate are not received within one or more periods of time. In one example, the command rate can be set to a fastest level. In another example, the command rate can be incrementally increased over periods of time. If a request to lower the command rate is received, the command rate can be set to a reference level or can be decremented to one slower rate level. In one or more embodiments, the one or more requests to lower the command rate can be based on at least one of an issue rate of speculative commands and a number of overcommit failures, among others.

First claim

What is claimed is:

1. A data processing system, comprising:
an interconnect;
a plurality of processing nodes coupled to the interconnect;
a fabric controller of the interconnect configured such that the fabric controller:
determines that a request to change a current command rate of a fabric arbiter of the interconnect was not received within a first sample window;
determines whether an incremental rate increase is to be utilized;
in response to determining the increment…

Assignees

• IBM

Inventors

• Guthrie Guy L
• Krolak David J
• Marino Charles F
• Reddy Praveen S
• Siegel Michael S

Classifications

• G06F13/4208 Primary

  Physics · mapped topic

• G06F13/4022

  Physics · mapped topic

• G06F3/00

  Physics · mapped topic

• G06F13/36

  Physics · mapped topic

• G06F9/54

  Physics · mapped topic