Command rate configuration in data processing system

摘要

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.

主权项

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 incremental rate increase is to be utilized, configures a first new command rate to a command rate level incrementally greater than the current command rate;in response to determining the incremental rate increase is not to be utilized, configures the first new command rate to a predetermined command rate greater than the current command rate; andissues, to the fabric arbiter of the interconnect, a first change rate command that includes the first new command rate.