DRAM Simulator Documentation

Overview

The DRAM simulator is an architecture simulation tool with a configurable parameter space. This document outlines the parameters and their sample values.

Configuration Parameters

The configuration space consists of the following parameters along with their sample values:

Parameter	Sample Value
PagePolicy	Open
Scheduler	Fifo
SchedulerBuffer	Bankwise
RequestBufferSize	8
CmdMux	Oldest
RespQueue	Fifo
RefreshPolicy	AllBank
RefreshMaxPostponed	8
RefreshMaxPulledin	8
PowerDownPolicy	NoPowerDown
Arbiter	Simple
MaxActiveTransactions	128

Parameter Mappers

Here are the mapper functions for each parameter:

• page_policy_mapper: {0: “Open”, 1: “OpenAdaptive”, 2: “Closed”, 3: “ClosedAdaptive”}

• scheduler_mapper: {0: “Fifo”, 1: “FrFcfsGrp”, 2: “FrFcfs”}

• schedulerbuffer_mapper: {0: “Bankwise”, 1: “ReadWrite”, 2: “Shared”}

• request_buffer_size_mapper: [1, 2, 4, 8, 16, 32, 64, 128]

• respqueue_mapper: {0: “Fifo”, 1: “Reorder”}

• refreshpolicy_mapper: {0: “NoRefresh”, 1: “AllBank”}

• refreshmaxpostponed_mapper: [1, 2, 4, 8]

• refreshmaxpulledin_mapper: [1, 2, 4, 8]

• arbiter_mapper: {0: “Simple”, 1: “Fifo”, 2: “Reorder”}

• max_active_transactions_mapper: [1, 2, 4, 8, 16, 32, 64, 128]

Utilizing the Parameter Space

We utilize supported vizier algorithms to suggest parameters within this space. The training scripts for each algorithm integrated with the DRAM simulator can be found here.

Conclusion

The DRAM simulator offers a configurable and versatile way to explore architecture scenarios using the defined parameter space. For more details on how to use the simulator and interpret results, refer to the provided training scripts and documentation.