configs: Add a lat_mem_rd style test script

Information
Submitter:	Andreas Hansson
Repository:	gem5
Branch:	default
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Description

Changeset 11365:b43ea1b6f554
---------------------------
configs: Add a lat_mem_rd style test script

This patch adds a config script that broadly replicates the behaviour
of lat_mem_rd. The test is based on traffic generators, and as such we
simply randomise addresses in increasingly large ranges, and play them
back using the trace functionality of the traffic generator.

The test script is accompanied by a post-processing and visualisation
script. At the moment no configurability is added to tweak the memory
hierarchy, but a follow on patch could easily extend the
functionality.

Testing Done

Issue Summary

Description	From	Last Updated	Status
Again, it would be nice if this wasn't hard coded. Also, shouldn't it have 3 more 0s? to make it ...	Jason Lowe-Power	March 6, 2016, 9:05 a.m.	Resolved

I looked a this a little too closely, I think.

configs/dram/lat_mem_rd.py (Diff revision 1)

Not a big deal, but you can remove the assumed tick rate with fromSeconds(toLatency('150ns')) IIRC.

Andreas Hansson March 4, 2016, 3:16 p.m. (March 4, 2016, 3:16 p.m.)

Can any of these time-resolution operations actually be carried out before the system is instantiated?

Jason Lowe-Power March 4, 2016, 3:19 p.m. (March 4, 2016, 3:19 p.m.)

That's true. You can disregard. Although, it would be nice if it wasn't hardcoded assuming Tick=1ps. I don't have a suggestion as to how to do this, however.

configs/dram/lat_mem_rd.py (Diff revision 1)

Again, it would be nice if this wasn't hard coded. Also, shouldn't it have 3 more 0s? to make it 10^12 (1 ps is the default tick rate, right)?

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Description:

~		Changeset 11338:0b53da5fbb22
	~	Changeset 11365:b43ea1b6f554

		configs: Add a lat_mem_rd style test script

		This patch adds a config script that broadly replicates the behaviour
		of lat_mem_rd. The test is based on traffic generators, and as such we
		simply randomise addresses in increasingly large ranges, and play them
		back using the trace functionality of the traffic generator.

		The test script is accompanied by a post-processing and visualisation
		script. At the moment no configurability is added to tweak the memory
		hierarchy, but a follow on patch could easily extend the
		functionality.

Diff:

Revision 2 (+456)

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	configs/dram/lat_mem_rd.py
	util/dram_lat_mem_rd_plot.py

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Issue Summary

Description:

Changeset 11338:0b53da5fbb22

Changeset 11365:b43ea1b6f554

Diff:

Status: Closed (submitted)