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January25,2005CELinuxForumMembersConfidential1LKSTforSHLineoSolutions,IncJanuary25,2005CELinuxForumMembersConfidential2PresentationOverviewLKST(LinuxKernelStateTracer)PortingtoSH4RenesasRTS7751R2D(CELFreferenceplatform)LKSTkernelconfigurationKeyPointofthePortingOutputcomparisonofx86(ReferenceModel)vs.
SHExamplesfortheLKSTOutputDemonstrationVisualizationtechniqueofLKSToutputJanuary25,2005CELinuxForumMembersConfidential3LKSTasDebuggingToolPowerfulandefficientEventtracingfunctionisusefulfortroubleanalysisPortingofMajorTracers(LKST,LTT,…)LTT:Version0.
9.
5asupportsx86,PPCandSHarchitectureLKSTFsupportsx86ContributiontoLinuxImprovementsinNumericalQuantificationAspectPerformanceEvaluation(Plans,examsandanalyseswithVisualization)SupportingPerformanceEvaluation(Portingand/tointegratedenvironments)OurMotivation&ObjectiveJanuary25,2005CELinuxForumMembersConfidential4HardwareRTS7751R2D(SH4)SoftwareLinux2.
6.
8.
1LKST2.
2.
1GCC3.
2.
3CooperativeDevelopmentforThisSystemSystemConceptandHardwareSupportTechnicalAdvisoryforLKSTTechnologiesSystemConstructionSystemEnvironmentsJanuary25,2005CELinuxForumMembersConfidential5LKSTKernel(1/2)SetupLKSTKernelConfigurationEnvironmentslinux-2.
6.
8.
1http://www.
kernel.
orgPatchesforLKST–lkst-2.
2.
1.
tar.
gz–lkstpatchset-2.
2.
1-for-2.
6.
8.
1-2.
tar.
gzJanuary25,2005CELinuxForumMembersConfidential6LKSTKernel(2/2)LKSTKernelConfigurationandPatchApplication:STEPS–Expandlinux-2.
6.
8.
1.
tar.
gz–Expandlkst-2.
2.
1.
tar.
gz–Expandlkstpatchset-2.
2.
1-for-2.
6.
8.
1-2.
tar.
gz–mvlkst-2.
2.
1/patcheslkst-2.
2.
1/patches-2.
6.
9–mvpatches-2.
6.
8.
1lkst-2.
2.
1/patches–makepatchKPRESRC=January25,2005CELinuxForumMembersConfidential7PorttoSHCPU(1)Base:LKSTkerneloni386SpecificPointsAdds#define__DISABLE_LKST_HOOK_arch/sh/boot/compressed/misc.
cLOOPS_PGFAULTAddshook-pointstodo_page_fault()arch/sh/mm/fault.
cAddscpu_khzvariablesinitializationusingtime_init()arch/sh/kernel/time.
cPROCESS_LTHREADGENAddshook-pointstokernel_thread()arch/sh/kernel/process.
cINT_HARDWARE_ENTRYAddshook-pointstodo_IRQ()arch/sh/kernel/irq.
cEventTypeCommentFileNameJanuary25,2005CELinuxForumMembersConfidential8PorttoSHCPU(2)CommentOutforSYSCALL_SYSENTERandSYSCALL_SYSEXITSHPortingCorrespondingtoAtomic_read_and_add()ini386SHPortingCorrespondingtolocal_atomic_read_and_add()ini386include/asm-sh/lkst_etype.
hChangesDefinedValueforLKST_BUFFER_SIZE_MAX(1MByteforDefault)include/asm-sh/lkst.
hSHPortingCorrespondingtois_asm_hook()ini386include/asm-sh/hook_private.
hSHPortingcorresponding_IF_HOOK_ENABLEDini386include/asm-sh/hook.
hEventTypeCommentFileNameJanuary25,2005CELinuxForumMembersConfidential9PorttoSHCPU(3)configASM_HOOKinclude/asm-sh/hook*.
hAddsconfigASM_HOOKarch/sh/KconfigSYSCALL_EXIT_HEADERAddshook-pointstosyscall_exitAddsDEBUG_KERNELAddssource"drivers/lkst/Kconfig"AddsconfigdependsonconfigHOOKDEBUG_KERNELarch/sh/kernel/entry.
SSYSCALL_ENTRY_HEADERAddsexternDecralationforcpu_khzAddshook-pointstosyscall_callinclude/asm-sh/timex.
hSHPortingCorrespondingtolkst_evhandlerprim_mc()ini386include/asm-sh/lkst_private.
hEventTypeCommentFileNameJanuary25,2005CELinuxForumMembersConfidential10PorttoSHCPU(4)OutputExampleforLKSTJanuary25,2005CELinuxForumMembersConfidential11PorttoSHCPU(5)OutputExampleofLKSTJanuary25,2005CELinuxForumMembersConfidential12PorttoSHCPU(6)PortingwasSmooth&Quick–BecomeAvailable…about1month–Evaluation,Comparisonwithx86,VisualizingTool…another1monthà1MonthPortingtoSHEvaluationà1MonthJanuary25,2005CELinuxForumMembersConfidential13DemonstrationDevelopmentofVisualizationToolforOutputResults–Fromhuge&complexoutputlogtextToBIOS-likeDisplay–ImplementedonTargetBoardOutputLogcanbecheckedrightthereonthetargetboard.
January25,2005CELinuxForumMembersConfidential14VisualizationToolOnRTS7751R2D(SH4)LKSTVisualizationToolLKSTComputationLKSTLogFileLKSTKernelVisualizingEngineLCDfontbitmapframebufferBlockDiagramJanuary25,2005CELinuxForumMembersConfidential15VisualDemoVideodemoisavailableJanuary25,2005CELinuxForumMembersConfidential16SummaryThroughLKSTporting,wefound;High&smoothportabilityPossiblefutureapproach:UsageasnewvisualizingtoolScopesinthefuturePortothermajor/usefultracersStackinganalysisWeContributetoimprovequalityofLinuxinitsperformancefromthenumericalquantificationviewpoint.
OurchallengeHookpointstothesystemcallsandexceptionprocessingJanuary25,2005CELinuxForumMembersConfidential17ThankYou!
ATTENTIONATTENTIONCorrespondingDemonstrationJan.
2517:00Jan.
2517:00--18:3018:30

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