NoC design and optimization for Multi-core media processors

LIST OF FIGURESxv4.12 FFT Benchmark. Energy per Instruction and Instructions per second 2 perWatt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.13 Y1:PCT, Y2:on-chip transit and off-chip comm. times. . . . . . . . . . . . 924.14 FFT benchmark results. (Program Completion Time, comm.: communication). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 924.15 FFT benchmark results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 944.16 Program Completion Times. . . . . . . . . . . . . . . . . . . . . . . . . . . 954.17 Alternative Tile Placements, custom process scheduling example and idealinterconnect comparison results. Benchmark: FFT, L1: 256K, L2: 512K. . 985.1 (a) Process graph of a HiperLAN/2 baseband processing SoC[7] and (b)NoC of the Object recognition processor[8]. . . . . . . . . . . . . . . . . . . 1035.2 A 64 Node, 8 × 8 2D LS-NoC along with NoC Manager interface to routingtables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1075.3 Pipe establishment and label swapping example in a 3×3 LS-NoC. . . . . . 1095.4 LabelSwitchedRouterwithsinglecycleflittraversal. ValidsignalidentifiesData and Label as valid. PauseIn and PauseOut are flow control signalsfor downstream and upstream routers. Routing table has output port andlabel swap information. Arbiter receives input from all the input portsalong with the flow control signal from the downstream router. . . . . . . . 1105.5 Label conflict at R1 resolved using Label swapping. il: Input Label, Dir:Direction, ol: Output Label. . . . . . . . . . . . . . . . . . . . . . . . . . . 1126.1 Surveillance system showing the application of LS-NoC in the Video computationserver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1246.2 A 2 router, 6 communicating nodes linear network. (b) Multiple source,multiple sink flow calculation in a network. . . . . . . . . . . . . . . . . . . 1266.3 (a) Number of pipes in a linear network (Fig. 6.2(a)), lw = 3 bits, varyingconstraints. Constraint 1: Max 1 pipe per sink. (b) Max. number of pipesin 2D Mesh (Fig. 5.2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1277.1 (a) Process blocks of HiperLAN/2 baseband processing SoC and Objectrecognition processor mapped on to a 8 × 8 LS-NoC. Pipe 1: PEC0 →PEC6, Pipe 2: MP → PEC3. (b) Flows set up for CBR & VBR traffic. . . 1317.2 Latency of HiperLAN/2 and ORP pipes in LS-NoC over varying injectionratesofnon-streamingapplicationnodes. Latencyofnon-provisionedpathsare titled (U). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1327.3 (a) Latency of CBR traffic over various injection rates of non-streamingnodes in LS-NoC. (b) Latency of VBR traffic over various injection ratesof non-streaming nodes in LS-NoC. . . . . . . . . . . . . . . . . . . . . . . 1337.4 LS-NoC being used alongside a best effort NoC. . . . . . . . . . . . . . . . 136B.1 Modules in LS-NoC router design shown along with testbench, implementedin Verilog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151B.2 Test cases used to verify an individual LS-NoC router. . . . . . . . . . . . 151