Computer Architecture: Vector Processing: SIMD/Vector/GPU ...

Carnegie Mellon University Vector Processing: Exploiting Regular (Data) Parallelism Data Parallelism Concurrency arises from performing the same operations on different pieces of data Single instruction multiple data (SIMD) E.g., dot product of two vectors Contrast with data flow

  University, Vector, Carnegie, Mellon, Carnegie mellon university vector

Computer Architecture: Branch Prediction

How to Handle Control Dependences Critical to keep the pipeline full with correct sequence of dynamic instructions. Potential solutions if the instruction is a control-flow instruction: Stall the pipeline until we know the next fetch address Guess the next fetch address (branch prediction) Employ delayed branching (branch delay slot) Do something else (fine-grained multithreading)

  Architecture, Prediction, Branch, Branch prediction

Computer Architecture: Main Memory (Part I)

Memory Bank Organization and Operation Read access sequence: 1. Decode row address & drive word-lines 2. Selected bits drive bit-lines • Entire row read 3. Amplify row data 4. Decode column address & select subset of row • Send to output 5. …

  Memory, Computer, Organization

CMOS Power Consumption - ECE:Course Page

Ways to reducing power consumption Load capacitance (C L) ⌧Roughly proportional to the chip area Switching activity (avg. number of transitions/cycle) ⌧Very data dependent ⌧A big portion due to glitches (real-delay) Clock frequency (f) ⌧Lowering only f decreases average power, but total energy is the same and throughput is worse 1.00 1 ...

  Consumption

MOSFET transistor I-V characteristics

Depletion Mode NMOSFET • Depletion mode FETs have a channel implanted such that there is conduction with V GS=0 • The operation is the same as the enhancement mode FET, but the threshold voltage is shifted •Vt is negative for depletion NMOS, and positive for depletion PMOS VGS n+ n+ VS VDS n+ p

  Dome, Transistor, Characteristics, Enhancement, Channel, Mosfets, Enhancement mode, Mosfet transistor i v characteristics

HDL Compiler for Verilog Reference Manual

Comments? E-mail your comments about Synopsys documentation to doc@synopsys.com HDL Compiler for Verilog Reference Manual Version 2000.05, May 2000

  Manual, Reference, Compiler, Verilog, Hdl compiler for verilog reference manual

Computer Architecture: Multithreading

Sun Niagara Multithreaded Pipeline 13 Tera MTA Fine-grained Multithreading 256 processors, each with a 21-cycle pipeline 128 active threads A thread can issue instructions every 21 cycles Then, why 128 threads? Memory latency: approximately 150 cycles No data cache Threads can be blocked waiting for memory More threads better ability to tolerate memory latency

  Multithreading

A Primer on Memory Consistency and Cache Coherence

Daniel J. Sorin, Duke University Mark D. Hill and David A. Wood, University of Wisconsin, Madison ... We thank Blake Hechtman for implementing and testing (and debugging!) all of the coherence protocols in this primer. As the reader will soon …

  Daniel, Blake

Chapter 5 Dimensional Analysis and Similarity

Chapter 5 • Dimensional Analysis and Similarity 5.1 For axial flow through a circular tube, the Reynolds number for transition to turbulence is approximately 2300 [see Eq. (6.2)], based upon the diameter and average velocity. If d = 5 cm and the fluid is kerosene at 20°C, find the volume flow rate in m3/h which causes transition. Solution: For kerosene at 20°C, take ρ = 804 kg/m3 …