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A single HMC-2500 x32 model based on: [1] DRAMSpec: a high-level DRAM bank modelling tool developed at the University of Kaiserslautern. This high level tool uses RC (resistance-capacitance) and CV (capacitance-voltage) models to estimate the DRAM bank latency and power numbers. [2] A Logic-base Interconnect for Supporting Near Memory Computation in the Hybrid Memory Cube (E. Azarkhish et. al) Assumed for the HMC model is a 30 nm technology node. The modelled HMC consists of a 4 Gbit part with 4 layers connected with TSVs. Each layer has 16 vaults and each vault consists of 2 banks per layer. In order to be able to use the same controller used for 2D DRAM generations for HMC, the following analogy is done: Channel (DDR) => Vault (HMC) device_size (DDR) => size of a single layer in a vault ranks per channel (DDR) => number of layers banks per rank (DDR) => banks per layer devices per rank (DDR) => devices per layer ( 1 for HMC). The parameters for which no input is available are inherited from the DDR3 configuration.
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/Introduction, and for more information about building the simulator and getting started please see http://www.gem5.org/Documentation and http://www.gem5.org/Tutorials. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/Dependencies for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ALPHA, ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/Build_System for more details and options. With the simulator built, have a look at http://www.gem5.org/Running_gem5 for more information on how to use gem5. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. Please see the gem5 download page for these items at http://www.gem5.org/Download If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.