Hi all, I merely wanted to point out that DRAMPower is essentially an executable version of the Micron model, not assuming best-case timings, and accommodating memories with/without DLLs. In short it's most likely the easiest and most straightforward way to go. The "energy-per-bit model" does not take the address pattern into account and could be very misleading depending on how many page hits/misses you have.
When it comes to using the latest repository you should hopefully be able to pop your patches, pull, update, and push your patches again. Andreas ________________________________________ From: gem5-users [[email protected]] On Behalf Of Pete Stevenson via gem5-users [[email protected]] Sent: Tuesday, February 10, 2015 8:59 PM To: Qi Jia; gem5 users mailing list Subject: Re: [gem5-users] Main memory energy in GEM5 Hi Qi - Not sure your exact needs, but you can use a simple model to estimate DRAM power. Essentially, this: P = P0 + k * BW the model parameters are P0 and k, and the input is the memory bandwidth. You can extract these parameters from a number of places, including the oft cited Micron DDR3 power calculation white paper and other papers: http://www.micron.com/~/media/documents/products/technical-note/dram/tn41_01ddr3_power.pdf http://csl.stanford.edu/~christos/publications/2012.lpddr2.isca.pdf If you need a more nuanced mode (e.g. on a RAS & CAS basis), just use the Micron tech note. Regards, Pete Stevenson On Tue, Feb 10, 2015 at 12:52 PM, Qi Jia via gem5-users <[email protected]<mailto:[email protected]>> wrote: Hi Andreas, Thanks for your kind reply. I find that the DRAMPower is integrated in the latest gem5-stable version, right? Currently I am using the previous gem5-stable version. For that version is there any way to get the main memory power? On Tue, Feb 10, 2015 at 12:09 PM, Andreas Hansson <[email protected]<mailto:[email protected]>> wrote: Hi, The gem5 DRAM controller is integrated with DRAMPower, and the energy/power is part of the gem5 stats (just make sure you have the appropriate IDD values in the DRAM configuration). Note that this model does not include the PHY, interface and controller power. Andreas From: Qi Jia via gem5-users <[email protected]<mailto:[email protected]>> Reply-To: Qi Jia <[email protected]<mailto:[email protected]>>, gem5 users mailing list <[email protected]<mailto:[email protected]>> Date: Tuesday, 10 February 2015 16:56 To: gem5 users mailing list <[email protected]<mailto:[email protected]>> Subject: [gem5-users] Main memory energy in GEM5 Hi All, I am trying to use gem5 with built-in main memory model for simulation. Can I know how to get the power/energy of the main memory? Is that necessary to use MCPAT or we have some alternatives to achieve that? Any suggestion is appreciated. Thanks -- 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 -- Qi Jia Graduate Student Department of Electrical and Computer Engineering North Carolina State University, Raleigh _______________________________________________ gem5-users mailing list [email protected]<mailto:[email protected]> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users -- 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 _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
