System_Software_for_b.L_Systems_Randhawa

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1、SystemsoftwareforARMbig.LITTLEsystemsAsoftwaretechniquetomaximizeenergyefficiencyandperformanceonARMbig.LITTLEsystemsRobinRandhawa,ATC-223September2011ThispaperpresentsanoveltechniquethatenablesexistingoperatingsystemstackstoleveragethecapabilitiesofARM’sfirstbig.LITTLEsystemdesignwithmi

2、nimalmodification.ARM’sbig.LITTLEsystemisbasedonthehigh-performanceCortex™-A15processor,theenergyefficientCortex-A7processor,thecoherentCCI-400interconnectandsupportingIP.ContentsIntroduction.................................................................................................

3、............................................................................2big.LITTLESystemfromARM.........................................................................................................................................3big.LITTLEtaskmigrationoverview...................

4、.......................................................................................................3TheRationaleforbig.LITTLEtaskmigration........................................................................................................4Systemsoftwarefortaskmigration...........

5、................................................................................................................4TheVirtualizerlayer...........................................................................................................................................................5

6、EntrypointstotheVirtualizerlayer..........................................................................................................................6TheSwitcherlayer.....................................................................................................................

7、..........................................8Clustertaskmigrationexpenditure...........................................................................................................................8Typicaloperatingsystemintegration.........................................