标签: 单核

基于Cyclone+IV的单核FPGA远程更新系统设计

我的多核性能需要多少搬家公司？HowmanymovingcompaniesdoIneedformymulticoreperformance?[pic]AtulVermaAsIwasexplainingmulticoreperformancetoafriendinmyearlierblogpost,Ithoughtofusingananalogythatmakesthisissueeasiertounderstand.Sohereitis:Supposeyouaremovingoutofyourhouseandyoucallamovingcompanytohelp. Themovingcompanythensendsatruckandcoupleofstrongguystodotheheavylifting.Let’ssayittakeseighthoursforthissetofmoverstopackallofthecontentsofyourhouseintoboxesandloadthetruck.Thequestionis–ifyouweretocalleightmovingcompanies(cores),wouldtheytogetherbeabletocompletethemoveinonehour?Theanswerdependsuponlayoutofyourhouse(chiparchitecture),numberofdifferentroo……

多核架构的性能在哪里？Whereismyperformance?[pic]AtulVermaWithoutadoubtmulticoreprocessingisbecomingmoremainstreamthesedays.Multicoreprogrammingorparallelprogrammingisnolongerconfinedtoesotericapplicationscodedbyninjaprogrammers. AdvancementsintoolsandmulticoreprogrammingparadigmssuchasOpenMPhavecertainlymadeprogrammingsimpler.However,asmoreandmoreprogrammersgetdrawntothefieldofmulticore,somegetfrustratedbytheresults.OnequestionIgetquiteoftenis:Whydon’tIget8timesgreaterperformancewhenmovingfrom1to8cores?Thisisaresultofwrongexpectationsandsomemisconceptions. Asmuchasthechiparchitectureisimportantformulticoreperformance,therearesoftwareconsiderationsthat……