CloudSim源代码学习之DatacenterCharacteristics.docx
《CloudSim源代码学习之DatacenterCharacteristics.docx》由会员分享，可在线阅读，更多相关《CloudSim源代码学习之DatacenterCharacteristics.docx（21页珍藏版）》请在冰豆网上搜索。
CloudSim源代码学习之DatacenterCharacteristics
packageorg.cloudbus.cloudsim;
importjava.util.List;//Anorderedcollection排好序的事件
importorg.cloudbus.cloudsim.core.CloudSim;//使网络仿真能够实现
importorg.cloudbus.cloudsim.lists.HostList;//主机列表
importorg.cloudbus.cloudsim.lists.PeList;//pe列表
/**DatacenterCharacteristics资源的静态属性
*DatacenterCharacteristicsrepresentsstaticpropertiesofa
*resourcesuchasresourcearchitecture,OperatingSystem（OS）,management
*policy（time-orspace-shared）,costandtimezoneatwhichtheresource
*islocatedalongresourceconfiguration.
*
*@authorManzurMurshed
*@authorRajkumarBuyya
*@authorRodrigoN.Calheiros
*@authorAntonBeloglazov
*@sinceCloudSimToolkit1.0
*/
publicclassDatacenterCharacteristics{
/**Theresourceid--setupwhenResourceiscreated.资源ID*/
privateintid;
/**Thearchitecture.架构*/
privateStringarchitecture;
/**Theos.操作系统*/
privateStringos;
/**Thehostlist.主机列表*/
privateList
extendsHost>hostList;
/**Thetimezone--differencefromGMT.时区*/
privatedoubletimeZone;
/**Price/CPU-unitifunit=sec.,thenG$/CPU-sec.每秒费用*/
privatedoublecostPerSecond;
/**ResourceTypes--allocationpolicy.分配协议*/
privateintallocationPolicy;
/**Time-sharedsystemusingRound-Robinalgorithm.【使用循环算法的时间共享系统】*/
publicstaticfinalintTIME_SHARED=0;
/**Spaced-sharedsystemusingFirstComeFirstServe（FCFS）algorithm.【使用先来先服务算法的空间共享系统】*/
publicstaticfinalintSPACE_SHARED=1;
/**AssumingallPEsinallMachineshavethesamerating.*/
publicstaticfinalintOTHER_POLICY_SAME_RATING=2;
/**AssumingallPEsinaMachinehavethesamerating.However,eachMachinehasdifferentratingtoeachother.*/
publicstaticfinalintOTHER_POLICY_DIFFERENT_RATING=3;
/**AresourcethatsupportsAdvancedReservationmechanisms.【支持预留机制】*/
publicstaticfinalintADVANCE_RESERVATION=4;
/**Thevmm.虚拟机管理程序*/
privateStringvmm;
/**Thecostpermem.每内存费用*/
privatedoublecostPerMem;
/**Thecostperstorage.每存储费用*/
privatedoublecostPerStorage;
/**Thecostperbw.每带宽费用*/
privatedoublecostPerBw;
/**【分配一新的数据中心特征对象】
*AllocatesanewDatacenterCharacteristicsobject.
*Ifthetimezoneisinvalid,thenbydefault,itwillbeGMT+0.默认时区
*
*@paramarchitecturethearchitectureofaresource
*@paramostheoperatingsystemused
*@paramvmmthevirtualmachinemonitorused
*@paramhostListlistofmachinesinaresource
*@paramtimeZonelocaltimezoneofauserthatownsthisreservation（预约时区）.
*Timezoneshouldbeofrange[GMT-12...GMT+13]
*@paramcostPerSecthecostpersectousethisresource
*@paramcostPerMemthecosttousememoryinthisresource
*@paramcostPerStoragethecosttousestorageinthisresource
*@paramcostPerBwthecostperbw
*
*@prearchitecture!
=null
*@preOS!
=null
*@preVMM!
=null
*@premachineList!
=null
*@pretimeZone>=-12&&timeZone<=13
*@precostPerSec>=0.0
*@precostPerMem>=0
*@precostPerStorage>=0
*@post$none
*/
publicDatacenterCharacteristics（
Stringarchitecture,
Stringos,
Stringvmm,
List
extendsHost>hostList,
doubletimeZone,
doublecostPerSec,
doublecostPerMem,
doublecostPerStorage,
doublecostPerBw）{
setId（-1）;
setArchitecture（architecture）;
setOs（os）;
setHostList（hostList）;
setAllocationPolicy（allocationPolicy）;
setCostPerSecond（costPerSec）;
setTimeZone（0.0）;
setVmm（vmm）;
setCostPerMem（costPerMem）;
setCostPerStorage（costPerStorage）;
setCostPerBw（costPerBw）;
}
/**【资源名】
*Getsthenameofaresource.
*
*@returntheresourcename
*
*@pre$none
*@post$result!
=null
*/
publicStringgetResourceName（）{
returnCloudSim.getEntityName（getId（））;
}
/**【至少有一个空闲PE的机器】
*GetsaMachinewithatleastoneemptyPe.
*
*@returnaMachineobjectorifnotfound
*@pre$none
*@post$none
*/
publicHostgetHostWithFreePe（）{
returnHostList.getHostWithFreePe（getHostList（））;
}
/**【给定空闲PE数的机器】
*GetsaMachinewithatleastagivennumberoffreePe.
*
*@parampeNumberthepenumber
*@returnaMachineobjectorifnotfound
*@pre$none
*@post$none
*/
publicHostgetHostWithFreePe（intpeNumber）{
returnHostList.getHostWithFreePe（getHostList（）,peNumber）;
}
/**【PE的MIPS】
*GetsMillionsInstructionsPerSecond（MIPS）RatingofaProcessing
*Element（Pe）.ItisassumedallPEs'ratingissameinagivenmachine.
*
*@returntheMIPSRatingorifnoPEsareexists.
*@pre$none
*@post$result>=-1
*/
@SuppressWarnings（"unchecked"）
publicintgetMipsOfOnePe（）{
if（getHostList（）.size（）==0）{
return-1;
}
returnPeList.getMips（（List）getHostList（）.get（0）.getPeList（）,0）;
}
/**资源异构时的获取PE的MIPS之方法....
*GetsMillionsInstructionsPerSecond（MIPS）RatingofaProcessing
*Element（Pe）.
*Itisessentialtousethismethodwhenaresourceismadeup
*ofheterogenousPEs/machines.
*
*@paramidthemachineID
*@parampeIdthePeID
*@returntheMIPSRatingorifnoPEsareexists.
*@preid>=0
*@prepeID>=0
*@post$result>=-1
*/
@SuppressWarnings（"unchecked"）
publicintgetMipsOfOnePe（intid,intpeId）{
if（getHostList（）.size（）==0）{
return-1;
}
returnPeList.getMips（（List）HostList.getById（getHostList（）,id）.getPeList（）,peId）;
}
/**【一个资源的MIPS之和】
*GetsthetotalMIPSrating,whichisthesumofMIPSratingofall
*machinesinaresource.
*
*TotalMIPSratingfor:
*
*
*@returnthesumofMIPSratings
*
*@pre$none
*@post$result>=0
*/
publicintgetMips（）{
intmips=0;
switch（getAllocationPolicy（））{
//AssumingallPEsinallMachinehavesamerating.假设所有机器里的PE有同样的速率
caseDatacenterCharacteristics.TIME_SHARED:
caseDatacenterCharacteristics.OTHER_POLICY_SAME_RATING:
mips=getMipsOfOnePe（）*HostList.getPesNumber（getHostList（））;
break;
//不同的机器有不同速率AssumingallPEsinagivenMachinehavethesamerating.
//ButdifferentmachinesinaClustercanhavedifferentrating
caseDatacenterCharacteristics.SPACE_SHARED:
caseDatacenterCharacteristics.OTHER_POLICY_DIFFERENT_RATING:
for（Hosthost:
getHostList（））{
mips+=host.getTotalMips（）;
}
break;
default:
break;
}
returnmips;
}
/**《时间共享》CPU时间
*GetstheCPUtimegiventhespecifiedparameters（onlyforTIME_SHARED）.
*NOTE:
TheCPUtimeforSPACE_SHAREDandADVANCE_RESERVATION
*arenotyetimplemented.
*
*@paramcloudletLengththelengthofaCloudlet云任务长度
*@paramloadtheloadofaCloudlet云任务负载
*
*@returntheCPUtime
*
*@precloudletLength>=0.0
*@preload>=0.0
*@post$result>=0.0
*/
publicdoublegetCpuTime（doublecloudletLength,doubleload）{
doublecpuTime=0.0;
switch（getAllocationPolicy（））{
caseDatacenterCharacteristics.TIME_SHARED:
cpuTime=cloudletLength/（getMipsOfOnePe（）*（1.0-load））;//load怎么算？
break;
default:
break;
}
returncpuTime;
}
/**【PE总数】
*GetsthetotalnumberofPEsforallMachines.
*
*@returnnumberofPEs
*
*@pre$none
*@post$result>=0
*/
publicintgetPesNumber（）{
returnHostList.getPesNumber（getHostList（））;
}
/**【空闲PE总数】
*GetsthetotalnumberofFREEornon-busyPEsforallMachines.
*
*@returnnumberofPEs
*
*@pre$none
*@post$result>=0
*/
publicintgetFreePesNumber（）{
returnHostList.getFreePesNumber（getHostList（））;
}
/**【机器PE总数】
*GetsthetotalnumberofBUSYPEsforallMachines.
*
*@returnnumberofPEs
*
*@pre$none
*@post$result>=0
*/
publicintgetBusyPesNumber（）{
returnHostList.getBusyPesNumber（getHostList（））;
}
/**【设置PE状态】
*SetstheparticularPestatusonaMachine.
*
*@paramstatusPestatus,eitherPe.FREEorPe.BUSY
*@paramhostIdMachineID
*@parampeIdPeid
*@return
*otherwise（MachineidorPeidmightnotbeexist）
*@premachineID>=0
*@prepeID>=0
*@post$none
*/
publicbooleansetPeStatus（intstatus,inthostId,intpeId）{
returnHostList.setPeStatus（getHostList（）,status,hostId,peId）;
}
/**【每MillionsInstruction的花费】
*GetsthecostperMillionsInstruction（MI）associatedwitharesource.
*
*@returnthecostusingaresource
*
*@pre$none
*@post$result>=0.0
*/
publicdoublegetCostPerMi（）{
returngetCostPerSecond（）/getMipsOfOnePe（）;
}
/**【机器总数】
*Getsthetotalnumberofmachines.
*
*@returntotalnumberofmachinesthisresourcehas.
*/
publicintgetHostsNumber（）{
returngetHostList（）.size（）;
}
/**【当前失效的机器】
*Getsthecurrentnumberoffailedmachines.
*
*@returncurrentnumberoffailedmachinesthisresourcehas.
*/
publicintgetFailedHostsNumber（）{
intfailedHostsNumber=0;
for（Hosthost:
getHostList（））{
if（host.isFailed（））{
failedHostsNumber++;
}
}
returnfailedHostsNumber;
}
/**【检查机器是否工作正常】
*Checkswhetherallmachinesofthisresourceareworkingproperlyornot.
*
*@returnifallmachinesareworking,
*otherwise
*/
publicbooleanisWorking（）{
booleanresult=false;
if（getFailedHostsNumber（）==0）{
result=true;
}
returnresult;
}
/**【使用资源的内存花费】
*Getthecosttousememoryinthisresource.
*
*@returnthecosttousememory
*/
publicdoublegetCostPerMem（）{
returncostPerMem;
}
/**【设置
升级会员 