abstract models of noc-based mpsocs for design space exploration

More documents

Recommendations

Info

! ! ! 87
88 6. CONCLUSION AND FUTURE WORK ! The!most!promising!technique!to!explore!the!complex!design!space!of!NoCSbased!MPSoC! platforms!is!to!build!simpler,!more!abstract!models!of!applications!and!platform!components,!and! to! evaluate! the! impact! of! alternative! compositions! on! performance! and! power! dissipation.! The! accuracy!and!speed!of!such!evaluation!must!be!high,!and!the!effort!to!build!and!compose!such! models!must!be!very!low,!so!that!they!can!provide!meaningful!results!early!on!the!design!flow.! This! Thesis! addressed! important! issues! in! this! scenario.! In! this! context,! the! main! contributions,! publications,!and!future!works!related!to!this!Thesis!are!detailed!as!follows.!! 6.1 Thesis contributions High9abstraction9and9high9accuracy9models:!Inaccurate!models!can!lead!to!wrong!design! decisions,!which!can!be!significant!to!the!failure!of!a!product.!In!this!scenario,!the/first/contribution! of!this!Thesis!comprises!the!proposition!of!simple,!flexible!and!accurate!NoC!architectures!models,! which! provide! accurate! results! when! are! comparable! to! those! obtained! using! commercial! RTL! evaluation! tools.! In! addition,! a! novel! technique! that! can! be! used! to! model! wormhole! packet! switching!NoCs,!in!order!to!reduce!the!simulation!time,!while!still!obtaining!accurate!results!for! latency,! throughput! and! power! estimation,! was! also! proposed! within! this! Thesis.! Another! contribution!of!the!proposed!approach!is!the!possibility!of!using!high!level!monitors!that!can!be! attached! to! a! graphical! interfaces,! allowing! the! analysis! of! different! performance! metrics! over! simulation!time.!! Model>based9 design9 flow:! the! second! main! contribution! of! this! Thesis! is! a! modelSbased! flow! that! comprises! accurate! executable! models! and! a! toolset! that! enable! the! design! space! exploration!of!NoCSbased!MPSoCs!at!early!stages!of!the!design!flow.!By!using!this!flow,!designers! can!explore!different!design!alternatives!regarding!the!design!space!of!applicationSmappingSNoC! platform!point!of!view.!The!proposed!approach!supports!the!evaluation!of!system!performance! (applicationSmappingSplatform)!using!different!views!of!the!platform!model!(already!supported!or! that!can!be!integrated),!differing!in!accuracy!and!simulation!speed.!! Benchmarking:! A! real! case! study,! comprising! four! real! applications,! was! employed! to! demonstrate!the!potential!of!the!presenting!approach,!evaluating!the!impact!of!different!design! alternatives,! varying! some! performance! characteristics! (e.g.! injection! rate),! as! well! as! different! mapping!heuristics.!! 6.2 Publications The!following!papers,!related!with!the!work!presented!in!this!thesis,!have!been!published! or!submitted!for!publication:! ! !
Page 1:
! PONTIFÍCIA UNIVERSIDADE CATÓLIC
Page 7 and 8:
! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Page 9 and 10:
! ABSTRACT MODELS OF NOC-BASED MPSO
Page 11 and 12:
Figure 34 - (a) Example of an appli
Page 13 and 14:
! LIST OF ABBREVIATIONS APD! Averag
Page 15:
5.! MODELNBASED!DESIGN!FLOW!FOR!NOC
Page 18 and 19:
est!placement!for!the!application!t
Page 20 and 21:
! 2. !!!a!technique!that!can!be!app
Page 22 and 23:
! 23
Page 24 and 25:
modeling,!as!proposed!in![KIE99],!i
Page 26 and 27:
! Director 1 input ports Composite
Page 28 and 29:
2.2.2.1 Initialization ! The! initi
Page 30 and 31:
! ! 31
Page 32 and 33:
flow![BER05].! ! Kogel!et!al.![KOG0
Page 34 and 35:
! One! contribution! of! the! propo
Page 36 and 37: ! Figure!11!-!Example!of!a!CDCG.!Fi
Page 38 and 39: using! HSPICE! and! the! Berkeley!
Page 40 and 41: and!direct!connection!links!between
Page 42 and 43: 3.3 MPSoC Application Modeling and
Page 44 and 45: already! designed.! Software! can!
Page 46 and 47: ! ! ! ! ! ! 47
Page 48 and 49: ! IP ' NI Router ' IP ' NI Router '
Page 50 and 51: for!the!sake!of!simplicity!and!effi
Page 52 and 53: input! port! having! a! routing! re
Page 54 and 55: [OST08].! ! ptrt hft + pcksize * ct
Page 56 and 57: accuracy!on!blocking!other!packets.
Page 58 and 59: NoC generation 1 Traffic Generation
Page 60 and 61: eference!model!(according!to!the!av
Page 62 and 63: packets)! in! average.! In! this! s
Page 64 and 65: ate! inside! a! given! sample! peri
Page 66 and 67: presents!such!a!small!difference!to
Page 68 and 69: and!the!switching!activity!of!its!a
Page 70 and 71: ! ! Power!model\Traffic! Uniform! N
Page 72 and 73: ! ! 73
Page 74 and 75: 8 Director 1 AB1 AB2 AB3 PE 01 AB1
Page 76 and 77: execution!of!applications!running!o
Page 78 and 79: ! Application/Modeling:!in!this!ste
Page 80 and 81: extracted!is!the!real!load!imposed!
Page 82 and 83: (a)!30%! (b)!40%! (c)!50%! Figure!3
Page 84 and 85: ! Table! XII! presents! the! maximu
Page 88 and 89: ! Indrusiak,!L.!S.;!Ost,!L.;!Mölle
Page 90 and 91: ! ! 91
Page 92 and 93: [BER05]! Bertozzi,! D.;! Jalabert,!
Page 94 and 95: [GUI08]! Guindani,! G.;! Reinbrecht
Page 96 and 97: ! Platforms”.!In:!IEEE!Symposium!
Page 98 and 99: [PIM01]! Pimentel,! A.D.;! Hertzber
show all

abstract models of noc-based mpsocs for design space exploration

Create successful ePaper yourself

Delete template?

Save as template?