Hi, The DRAMCtrl.py code is capturing a single channel, and for multi-channel systems, we simply instantiate a number of these modules and stripe across them. The interleaving/striping is done in the bus (which is really a crossbar).
If you use fs.py or se.py you should be able to simply use the —men-channels parameter. See config/common/MemConfig.py for how it is set up. As a small side note, if you want to capture a “ganged” multi-channel DRAM then it is really just acting as a single channel from gem5’s point of view. I hope that clarifies things. Andreas From: jiakunli2010 <[email protected]<mailto:[email protected]>> Reply-To: gem5 users mailing list <[email protected]<mailto:[email protected]>> Date: Monday, 7 April 2014 14:59 To: gem5-users <[email protected]<mailto:[email protected]>> Subject: [gem5-users] Simulating multi-channel DRAM Hi All! I am trying to simulate a multi-channel DRAM in classic memory system using DRAM_ctrl.cc. But it seems that it doesn't simulate any multi-channel behavior. I found the parameter "channels", which decides the address mapping in decodeAddr().But when reading and writing data, the DRAM controller only accesses to banks[rank][bank] included by one channel, not several channels. Could anyone correct me if my understanding is wrong, or tell me how to simulate multi-channel DRAM behavior? Thanks! ===== P.S. I am confused by the "reply via email" function. I pressed the button and wrote my reply but it just went to the email address but didn't appear on the list... Sorry for the trouble I brought to Andreas Hansson in the last thread. jiakunli2010，[email protected]<mailto:[email protected]> 2014/4/7 -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2548782
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