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umd-memsys / DRAMSim2

DRAMSim2: A cycle accurate DRAM simulator
http://www.ece.umd.edu/~blj/papers/cal10-1.pdf
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Meaning of ini parameters #58

Closed dzaragoza closed 9 years ago

dzaragoza commented 9 years ago

Hello

Reading the example ini files I don't understand what the following parameters mean:

Could you please explain what those parameters mean?

Kind regards David

dzaragoza commented 9 years ago

To answer part of my own question: AL is the Additive Latency used in posted CAS and BL is the Burst Length. I'm guessing tCMD is the delay between commands, but I still don't know what tRTRS is.

dramninjasUMD commented 9 years ago

tRTRS is the rank-to-rank switching time. Basically this is a delay needed to add some quiet time on the shared bus when we change who is currently driving the bus.

tCMD is just how long it takes to transmit a command.

dramninjasUMD commented 9 years ago

Just one more note. For anyone looking to get a good overview of DRAM timing parameters but don't have access to the memory book, Dave Wang's thesis is pretty stellar: http://www.ece.umd.edu/~blj/papers/thesis-PhD-wang--DRAM.pdf