layerssandybridge
sandybridge 时间:2021-03-27 阅读:()
KVMandCPUfeatureenablementEduardoHabkostDeveloperConference2014AgendaBasicconceptsExistingmechanismsandcurrentchallengesCurrentworkandfutureplans!
2BasicsIntroduction:Basics!
4HostCPU(management)KernelQEMUKVMVMGuestOSlibvirtIntroduction:Basics!
4command-line,monitor(QMP)HostCPU(management)KernelQEMUKVMVMGuestOSlibvirtIntroduction:StableguestABIGuestOSshouldseethe"same"machine,evenifthehostsystemhaschangedHardrequirementforlivemigrationSoftrequirementfornon-livemigrationHostsystemmaychangealot,butVMshouldlookthesame!
5x86CPUIDinstructionReturnsinformationabouttherunningCPUMostinformationshownon/proc/cpuinfoFeatureagsindicatingafeatureispresentOthermorecomplexdatae.
g.
:cacheandtopologyinformationCPUIDdataispartofguestABI!
6ExistingMechanismsCPUIDhandling!
8HOSTCPUQEMUGuestOSKernelCPUIDhandling!
8HOSTCPUQEMUGuestOSKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionCPUIDhandling!
8HOSTCPUQEMUGuestOSCPUIDtableSET_CPUIDKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionCPUIDhandling!
8HOSTCPUQEMUGuestOSCPUIDtableSET_CPUIDKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionemulateCPUIDGuestCPUIDinstructionHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtTheStack!
9Decisiontoenableafeature(shouldbe)takenintheupperlayersLowerlayersaffecttheabilitytoenableafeatureEnablingnewfeaturesWecan'tsilentlyenableordisableafeature:ItbreaksguestABIMayunexpectedlypreventmigrationtoother(lesspowerful)hosts!
10CPUmodelsCPUmodeltable,differentCPUIDdataoneachentryqemu-system-x86_64-cpuSandyBridgeqemu-system-x86_64-cpuHaswellControllingindividualfeatures.
e.
g.
:-cpuNehalem,+aesCPUmodelentriesmaychange,machine-typeskeepcompatibilityqemu-system-x86_64-machinepc-1.
6-cpuSandyBridgeqemu-system-x86_64-machinepc-1.
7-cpuSandyBridgeenforceag.
e.
g.
:-cpuSandyBridge,enforceRequiredtoensurepredictableresults!
11CPUmodelsSpecialCPUmodel:-cpuhostWillenableeverythingthat'ssupportedbythehostNostableguestABI!
12ManagementrequirementsEnsuringthattheresultingCPUIDdataiswhatwasaskedforKnowingwhichCPUmodelscanbeenabledinahostKnowingwhichfeaturesareavailableinahostKnowingtowhichhostsaVMcanbemigrated!
13IssuesHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:queryingCPUmodelinformationlibvirthasitsownlistofCPUmodelslibvirtdoesn'tknowQEMUCPUmodelscanchangeovertimeQEMU'sfault,there'snogoodAPIforthat(yet!
)!
15CPUmodellistQEMUCPUmodellistHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:no"enforce"modelibvirtdoesn'tusetheenforceagErrorreportingnotmachine-friendlyMostseriousissuesofarFixinvolvesimplementingCPUmodelandhostcapabilityAPIs!
16X,Z-cpu…,+X,+Y,+ZX!
(noY)!
(noZ)X,YHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:queryinghostcapabilitieslibvirtquerieshostCPUfeaturesdirectlyusingCPUIDinstructionIgnoresKVMcapabilitiesIgnoresQEMUcapabilitiesIgnoresfeaturesthatrequireextraCPUcapabilitiesQEMU'sfault,there'snogoodAPIforthat(yet!
)!
17SolutionsSolutionsExistinginterfaces:CPU-specicoptionsandcommands-cpu,cpu-add,query-cpu-definitionsNewinterfaces:basedoncommoninfrastructure(QDev,QOM)!
19QDevQDev=QEMUDeviceModelQOM=QEMUObjectModelQDevdevicesareQOMobjects-devicecommand-lineoptionQMPcommands:Addingdevices/objects(device_add,object-add)Removingdevices/objects(device_del,object-del)Getting/settingdevicesproperties(qom-get,qom-set)Listingobjectsandobjectclasses(qom-list,qom-list-types)!
20QDev-basedsolutionCPUsareQDevdevices(done)CPUdevicesanditspropertiesvisiblethroughQMPfeature-wordsproperty(done)QueryCPUmodelinfoQueryhostcapabilities("host"CPUmodel)Incomplete:nomachine-type-specicdatafiltered-featuresproperty(done)Usedtoemulate"enforce"modewithbettererrorreportingNotusedbylibvirtyet!
21What'smissing(1/2)QueryingCPUmodelinformationwithoutre-runningQEMUSolution:separateQOMtypesforeachCPUmodelExposingmachine-type-specicdataNodenedsolutionyetUseQOMpropertiestocontrolallfeatureagsChanginglibvirttousethenewstuff!
22What'smissing(2/2)Longtermplans:Deprecate-cpu,cpu-addanduseonlyQDevcommands(-device,device_add)BetterinterfacestospecifyCPUtopology(NUMAnodes,sockets,cores,threads)!
23FutureReportingcapabilitiesreliablysmartermanagementsystemsUsability(automaticallychoosinggooddefaults)SmarterVMschedulingMayrequireextendinglibvirtAPI!
24ThanksFeedback:http://devconf.
cz/f/34!
Additionalinfo/pointers:http://wiki.
qemu.
org/Features/CPUModelsehabkost@redhat.
com!
Questions!
25
2BasicsIntroduction:Basics!
4HostCPU(management)KernelQEMUKVMVMGuestOSlibvirtIntroduction:Basics!
4command-line,monitor(QMP)HostCPU(management)KernelQEMUKVMVMGuestOSlibvirtIntroduction:StableguestABIGuestOSshouldseethe"same"machine,evenifthehostsystemhaschangedHardrequirementforlivemigrationSoftrequirementfornon-livemigrationHostsystemmaychangealot,butVMshouldlookthesame!
5x86CPUIDinstructionReturnsinformationabouttherunningCPUMostinformationshownon/proc/cpuinfoFeatureagsindicatingafeatureispresentOthermorecomplexdatae.
g.
:cacheandtopologyinformationCPUIDdataispartofguestABI!
6ExistingMechanismsCPUIDhandling!
8HOSTCPUQEMUGuestOSKernelCPUIDhandling!
8HOSTCPUQEMUGuestOSKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionCPUIDhandling!
8HOSTCPUQEMUGuestOSCPUIDtableSET_CPUIDKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionCPUIDhandling!
8HOSTCPUQEMUGuestOSCPUIDtableSET_CPUIDKernelGET_SUPPORTED_CPUIDHostCPUIDinstructionemulateCPUIDGuestCPUIDinstructionHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtTheStack!
9Decisiontoenableafeature(shouldbe)takenintheupperlayersLowerlayersaffecttheabilitytoenableafeatureEnablingnewfeaturesWecan'tsilentlyenableordisableafeature:ItbreaksguestABIMayunexpectedlypreventmigrationtoother(lesspowerful)hosts!
10CPUmodelsCPUmodeltable,differentCPUIDdataoneachentryqemu-system-x86_64-cpuSandyBridgeqemu-system-x86_64-cpuHaswellControllingindividualfeatures.
e.
g.
:-cpuNehalem,+aesCPUmodelentriesmaychange,machine-typeskeepcompatibilityqemu-system-x86_64-machinepc-1.
6-cpuSandyBridgeqemu-system-x86_64-machinepc-1.
7-cpuSandyBridgeenforceag.
e.
g.
:-cpuSandyBridge,enforceRequiredtoensurepredictableresults!
11CPUmodelsSpecialCPUmodel:-cpuhostWillenableeverythingthat'ssupportedbythehostNostableguestABI!
12ManagementrequirementsEnsuringthattheresultingCPUIDdataiswhatwasaskedforKnowingwhichCPUmodelscanbeenabledinahostKnowingwhichfeaturesareavailableinahostKnowingtowhichhostsaVMcanbemigrated!
13IssuesHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:queryingCPUmodelinformationlibvirthasitsownlistofCPUmodelslibvirtdoesn'tknowQEMUCPUmodelscanchangeovertimeQEMU'sfault,there'snogoodAPIforthat(yet!
)!
15CPUmodellistQEMUCPUmodellistHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:no"enforce"modelibvirtdoesn'tusetheenforceagErrorreportingnotmachine-friendlyMostseriousissuesofarFixinvolvesimplementingCPUmodelandhostcapabilityAPIs!
16X,Z-cpu…,+X,+Y,+ZX!
(noY)!
(noZ)X,YHostCPU(management)KernelQEMUKVMVMGuestOSlibvirtProblem:queryinghostcapabilitieslibvirtquerieshostCPUfeaturesdirectlyusingCPUIDinstructionIgnoresKVMcapabilitiesIgnoresQEMUcapabilitiesIgnoresfeaturesthatrequireextraCPUcapabilitiesQEMU'sfault,there'snogoodAPIforthat(yet!
)!
17SolutionsSolutionsExistinginterfaces:CPU-specicoptionsandcommands-cpu,cpu-add,query-cpu-definitionsNewinterfaces:basedoncommoninfrastructure(QDev,QOM)!
19QDevQDev=QEMUDeviceModelQOM=QEMUObjectModelQDevdevicesareQOMobjects-devicecommand-lineoptionQMPcommands:Addingdevices/objects(device_add,object-add)Removingdevices/objects(device_del,object-del)Getting/settingdevicesproperties(qom-get,qom-set)Listingobjectsandobjectclasses(qom-list,qom-list-types)!
20QDev-basedsolutionCPUsareQDevdevices(done)CPUdevicesanditspropertiesvisiblethroughQMPfeature-wordsproperty(done)QueryCPUmodelinfoQueryhostcapabilities("host"CPUmodel)Incomplete:nomachine-type-specicdatafiltered-featuresproperty(done)Usedtoemulate"enforce"modewithbettererrorreportingNotusedbylibvirtyet!
21What'smissing(1/2)QueryingCPUmodelinformationwithoutre-runningQEMUSolution:separateQOMtypesforeachCPUmodelExposingmachine-type-specicdataNodenedsolutionyetUseQOMpropertiestocontrolallfeatureagsChanginglibvirttousethenewstuff!
22What'smissing(2/2)Longtermplans:Deprecate-cpu,cpu-addanduseonlyQDevcommands(-device,device_add)BetterinterfacestospecifyCPUtopology(NUMAnodes,sockets,cores,threads)!
23FutureReportingcapabilitiesreliablysmartermanagementsystemsUsability(automaticallychoosinggooddefaults)SmarterVMschedulingMayrequireextendinglibvirtAPI!
24ThanksFeedback:http://devconf.
cz/f/34!
Additionalinfo/pointers:http://wiki.
qemu.
org/Features/CPUModelsehabkost@redhat.
com!
Questions!
25
- layerssandybridge相关文档
- E5sandybridge
- PenguinComputingClustersandybridge
- casesandybridge
- cumulativesandybridge
- 5.sandybridge
- 希捷sandybridge
2021HawkHost老鹰主机黑色星期五虚拟主机低至3.5折 永久4.5折
老鹰主机HawkHost是个人比较喜欢的海外主机商，如果没有记错的话，大约2012年左右的时候算是比较早提供支付宝付款的主机商。当然这个主机商成立时间更早一些的，由于早期提供支付宝付款后，所以受众用户比较青睐，要知道我们早期购买海外主机是比较麻烦的，信用卡和PAYPAL还没有普及，大家可能只有银联和支付宝，很多人选择海外主机还需要代购。虽然如今很多人建站少了，而且大部分人都用云服务器。但是老鹰主机...
pacificrack：超级秒杀，VPS低至$7.2/年，美国洛杉矶VPS，1Gbps带宽
pacificrack又追加了3款特价便宜vps搞促销，而且是直接7折优惠（一次性），低至年付7.2美元。这是本月第3波便宜vps了。熟悉pacificrack的知道机房是QN的洛杉矶，接入1Gbps带宽，KVM虚拟，纯SSD RAID10，自带一个IPv4。官方网站：https://pacificrack.com支持PayPal、支付宝等方式付款7折秒杀优惠码：R3UWUYF01T内存CPUSS...
WHloud Date鲸云数据($9.00/月), 韩国，日本，香港
WHloud Date（鲸云数据），原做大数据和软件开发的团队，现在转变成云计算服务，面对海内外用户提供中国大陆，韩国，日本，香港等多个地方节点服务。24*7小时的在线支持，较为全面的虚拟化构架以及全方面的技术支持！官方网站：https://www.whloud.com/WHloud Date 韩国BGP云主机少量补货随时可以开通，随时可以用，两小时内提交退款，可在工作日期间全额原路返回！支持pa...
sandybridge为你推荐
-
johncusack谁知道《失控的陪审团》的电影内容是什么？约翰·库萨克在里面演的是什么角色？李子柒年入1.6亿宋朝鼎盛时期 政府财政收入有将近1亿贯铜钱，那么GDP是多少呢？比肩工场大运比肩主事,运行长生地是什么意思？7788k.comwww.8855k.com是个什么网站sss17.com为什么GAO17.COM网站打不开了www.119mm.comwww.kb119.com 这个网站你们能打开不？51sese.comwww.51xuanh.com这是什么网站是骗人的吗？mole.61.com谁知道摩尔庄园的网址啊抓站工具抓鸡要什么工具?广告法中华人民共和国广告法中,有哪些广告不得发布?