Apparatus and method for providing quality of service on DRAM

Abstract

The invention relates to a device for providing service quality on a dynamic random access memory and a method thereof. The method comprises the following steps: step 1. configuring port types of various request ports of a front end arbitrator; and initializing a scheduling resource counter which is used for setting a scheduling period, and calculating usable resources and allocation resources of the various request ports of the front end arbitrator; step 2. calculating the priorities of the various request ports of the front end arbitrator according to the port types of the various request ports of the front end arbitrator and the allocation resources of the various request ports of the front end arbitrator; and step 3. transmitting a request on a port with the highest priority to a memory controller for providing the service quality. In the method, the requests transmitted by various devices are sorted by the corresponding priorities according to different service quality strategies. The priority configuration is modified when the resources allocated to one device reaches an upper limit or the resources allocated to the device with the fixed bandwidth is required to be in a critical state.

Description

technical field [0001] The invention relates to the computer field, in particular to a device and a method for providing quality of service on a dynamic random access memory. Background technique [0002] The storage subsystem is usually the largest shared resource in a computer system and needs to serve multiple types of devices. When the memory controller is shared, requests from different devices must be arbitrated before reaching the memory controller, and the winning request is selected and forwarded to the memory controller. Existing storage subsystems such as figure 1 shown. [0003] In order to make the behavior and performance of the whole system controllable, the storage subsystem needs to be able to provide specific quality of service for different devices. Quality of service requirements generally fall into three categories: low latency, guaranteed bandwidth, and irrelevant. For example, the performance of the central processing unit depends on the speed of m...

AI Technical Summary

Problems solved by technology

In particular, the request issued by the processor is related to the running program, which may issue a request that is very unfriendly to the DRAM, constantly changing pages, causing a sharp drop in available bandwidth, thereby impairing the service quality of devices with mandatory quality requirements

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