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tukl-msd / DRAMSys

DRAMSys a SystemC TLM-2.0 based DRAM simulator.
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simulate single x8 DRAM #32

Open klaru opened 1 year ago

klaru commented 1 year ago

How can I simulate a channel with a single x8 DRAM?

I can simulate a channel with four or two DRAMs by changing the "nbrOfDevices" parameter in the memspec .json file AND simultaneously change the "BYTE_BIT" addresses by removing address 2 (for four x8 devices) or by removing addresses 1 and 2 (for two x8 devices). However, this doesn't work for "nbrOfDevices"=1 since when I remove all "BYTE_BITS" I get a segmentation fault.

Also, how could I simulate a channel with a single x4 DRAM (which is less than a byte wide)?

lsteiner-tukl commented 1 year ago

Thank you for the hint. Here is a patch that fixes this problem. However, simulating only one x4 device is not yet possible. fix_single_device.patch

klaru commented 1 year ago

Thanks for the patch. It works.

Any plans to make a single x4 device work as well?

Klaus

From: lsteiner-tukl @.> Sent: Wednesday, August 30, 2023 1:49 To: tukl-msd/DRAMSys @.> Cc: klaru @.>; Author @.> Subject: Re: [tukl-msd/DRAMSys] simulate single x8 DRAM (Issue #32)

Thank you for the hint. Here is a patch that fixes this problem. However, simulating only one x4 device is not yet possible. fix_single_device.patch https://github.com/tukl-msd/DRAMSys/files/12473664/fix_single_device.patch

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lsteiner-tukl commented 1 year ago

One problem is that our address mappings work on byte granularity. Are you planning to run simulations with enabled storage? Because from a behavioral perspective it makes no difference whether you only simulate a single device or a whole DIMM.