简单分析系统开机时间

（1）Android通用开机Log

adb logcat -b events | grep boot_p12-29 15:32:47.020   526   526 I boot_progress_start: 16213
12-29 15:32:49.720   526   526 I boot_progress_preload_start: 18913
12-29 15:32:54.702   526   526 I boot_progress_preload_end: 23895
12-29 15:32:55.536  1179  1179 I boot_progress_system_run: 24728
12-29 15:32:56.947  1179  1179 I boot_progress_pms_start: 26139
12-29 15:32:57.608  1179  1179 I boot_progress_pms_system_scan_start: 26801
12-29 15:33:05.009  1179  1179 I boot_progress_pms_data_scan_start: 34202
12-29 15:33:05.289  1179  1179 I boot_progress_pms_scan_end: 34481
12-29 15:33:05.829  1179  1179 I boot_progress_pms_ready: 35021
12-29 15:33:09.788  1179  1179 I boot_progress_ams_ready: 38981
12-29 15:33:12.202  1179  1201 I boot_progress_enable_screen: 41394

（2）Mtk平台开机启动Log

cat /proc/bootprof----------------------------------------
0       BOOT PROF (unit:msec)
----------------------------------------4761        : preloader3606        : lk (Start->Show logo: 1208)
----------------------------------------40.478999 : ON (Threshold:   15ms)418.725154 :    1-swapper/0       : probe: probe=platform_drv_probe drv=clk-mt6765(0xffffffa26474aa20)    39.045462ms565.313462 :    1-swapper/0       : initcall: of_platform_default_populate_init   194.358693ms638.776616 :    1-swapper/0       : initcall: ccci_util_init    53.934462ms704.410616 :    1-swapper/0       : initcall: tracer_init_tracefs    41.219770ms1005.819847 :    1-swapper/0       : initcall: populate_rootfs   285.987539ms1811.095695 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt6577-uart(0xffffffa2647549f0)   748.027309ms1836.324542 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt6577-uart(0xffffffa2647549f0)    23.572923ms1838.336772 :    1-swapper/0       : initcall: mtk8250_platform_driver_init   775.519079ms1879.570465 :    1-swapper/0       : initcall: brd_init    26.892077ms1914.646926 :    1-swapper/0       : initcall: loop_init    34.000461ms1992.602619 :    1-swapper/0       : probe: probe=platform_drv_probe drv=trusted_mem(0xffffffa2647910f8)    29.559077ms1994.334080 :    1-swapper/0       : initcall: trusted_mem_driver_init    31.678077ms2041.337465 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtkfb(0xffffffa26479b4a0)    25.164077ms2043.227004 :    1-swapper/0       : initcall: mtkfb_init    27.763308ms2192.263081 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtk_mmdvfs_pmqos(0xffffffa2647a7330)   127.797692ms2194.906850 :    1-swapper/0       : initcall: mmdvfs_pmqos_init   130.900924ms2245.893696 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtk-thermal-legacy(0xffffffa2647aa200)    22.353385ms2248.743927 :    1-swapper/0       : initcall: tscpu_init    26.151385ms2303.388235 :    1-swapper/0       : initcall: mtk_cooler_dtm_init    25.893231ms2390.438851 :    1-swapper/0       : initcall: ISP_Init    80.872923ms2483.359928 :    1-swapper/0       : probe: probe=platform_drv_probe drv=musb-hdrc(0xffffffa2647bd1e8)    49.478077ms2485.999005 :    1-swapper/0       : initcall: musb_init    53.788462ms2513.009389 :    1-swapper/0       : initcall: init    21.997462ms2567.106543 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt6397(0xffffffa2647bfa58)    41.139000ms2568.761236 :    1-swapper/0       : initcall: mt6397_driver_init    43.555385ms2599.696851 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt63xx-oc-debug(0xffffffa2647c0d90)    28.964615ms2601.395928 :    1-swapper/0       : initcall: mt63xx_oc_debug_driver_init    31.454461ms2619.721697 :    1-swapper/0       : initcall: mtk_spi_driver_init    16.035077ms2709.232313 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtk-kpd(0xffffffa2647d7b40)    52.585385ms2711.591851 :    1-swapper/0       : initcall: kpd_pdrv_init    55.270770ms4223.604470 :    1-swapper/0       : probe: probe=i2c_device_probe drv=GSL_TP(0xffffffa2647d7ed8)  1485.347234ms4231.512624 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt-i2c(0xffffffa2647da888)  1502.461311ms4271.961394 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt-i2c(0xffffffa2647da888)    16.426923ms4315.528932 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt6370_pmu_fled(0xffffffa2647b9fa0)    15.822077ms4362.087471 :    1-swapper/0       : probe: probe=i2c_device_probe drv=mt6370_pmu(0xffffffa2647b73c8)    83.660923ms4441.135394 :    1-swapper/0       : probe: probe=i2c_device_probe drv=usb_type_c(0xffffffa2647bd6d0)    77.316693ms4442.745240 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt-i2c(0xffffffa2647da888)   169.193846ms4447.990625 :    1-swapper/0       : initcall: mt_i2c_init  1722.249311ms4576.900625 :    1-swapper/0       : probe: probe=i2c_device_probe drv=speaker_amp(0xffffffa264805978)    55.233539ms4580.879087 :    1-swapper/0       : initcall: mtk_spk_i2c_driver_init    59.296154ms4656.191394 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt-soc-dl1-pcm(0xffffffa2648061c0)    69.690769ms4658.289779 :    1-swapper/0       : initcall: mtk_soc_platform_init    72.578539ms4744.436856 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtk-audio(0xffffffa26480ea28)    68.348615ms4746.476395 :    1-swapper/0       : initcall: mt_soc_snd_init    70.638538ms4808.109164 :    1-swapper/0       : probe: probe=platform_drv_probe drv=scp(0xffffffa264782dc0)    31.838000ms4812.511395 :    1-swapper/0       : initcall: scp_init    40.202846ms4863.471549 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt6370_pmu_charger(0xffffffa2647bb718)    48.059308ms4867.946703 :    1-swapper/0       : initcall: mt6370_pmu_charger_init    54.361154ms4961.126703 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=gpufreq(0xffffffa264758f48)    67.672539ms4993.407857 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=driver_modem_mt6765(0xffffffa26478ee70)    28.559385ms5054.620549 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=mtk_ts_pmic(0xffffffa2647aa6c8)    36.225692ms5096.371088 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=mt6357_ts_buck1(0xffffffa2647ac3a8)    39.964692ms5131.866703 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=mt6357_ts_buck2(0xffffffa2647ac608)    33.668385ms5365.049550 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=mt6357_gauge(0xffffffa2647ea340)   231.285616ms5391.135473 :  101-kworker/0:1     : probe: probe=platform_drv_probe drv=pvrsrvkm(0xffffffa26475fb40)    19.228308ms5393.268781 :    1-swapper/0       : initcall: deferred_probe_initcall   500.003617ms5506.271550 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mt-cpufreq(0xffffffa264770698)    90.250231ms5507.923320 :    1-swapper/0       : initcall: _mt_cpufreq_pdrv_init    96.796693ms5921.842705 :    1-swapper/0       : initcall: ppm_power_data_init   399.268847ms6026.472552 :    1-swapper/0       : probe: probe=i2c_device_probe drv=stk3x3x(0xffffffa264783588)    93.323923ms6028.132398 :    1-swapper/0       : initcall: alsps_init    95.039154ms6091.743090 :    1-swapper/0       : probe: probe=platform_drv_probe drv=leds-mt65xx(0xffffffa2647ac990)    22.928538ms6093.399706 :    1-swapper/0       : initcall: mt65xx_leds_init    25.062154ms6256.388014 :    1-swapper/0       : probe: probe=platform_drv_probe drv=image_sensor(0xffffffa2647ae558)   160.360539ms6258.261552 :    1-swapper/0       : initcall: imgsensor_init   163.708692ms6324.558706 :    1-swapper/0       : probe: probe=platform_drv_probe drv=mtk-dvfsrc-debug(0xffffffa2647a18d8)    26.488461ms6324.700937 :    1-swapper/0       : initcall: mtk_dvfsrc_debug_init    27.355615ms6347.251706 :    1-swapper/0       : Kernel_init_done9091.639482 :  332-init            : INIT:early-init10695.406024 :  332-init            : INIT:init10767.376563 :  332-init            : INIT:late-init10793.720332 :  332-init            : INIT:early-fs10797.053948 :  332-init            : INIT:fs10805.254409 :  332-init            : INIT:Mount_START11129.458333 :  332-init            : INIT:Mount_END11199.088641 :  332-init            : INIT:post-fs11348.270487 :  332-init            : tkcore: prepare system ta path11428.625334 :  332-init            : INIT:late-fs12564.189875 :  332-init            : INIT:Mount_START --late12821.710414 :  332-init            : INIT:Mount_END --late12874.341645 :  383-vold            : vold:fbeEnable:START12876.628029 :  383-vold            : vold:retrieveOrGenerateKey:START12924.655183 :  383-vold            : vold:retrieveOrGenerateKey:END, rtn =112925.782568 :  383-vold            : vold:install_storage_key(device_key):START12928.953337 :  383-vold            : vold:install_storage_key(device_key):END, rtn =112936.662183 :  383-vold            : vold:generateStorageKey(per_boot_key):START12937.882414 :  383-vold            : vold:generateStorageKey(per_boot_key):END, rtn =112939.108107 :  383-vold            : vold:install_storage_key(per_boot_key):START12940.795260 :  383-vold            : vold:install_storage_key(per_boot_key):END, rtn =112946.741491 :  383-vold            : vold:fbeEnable:END, rtn =113852.360186 :  383-vold            : vold:initUser0:START13944.508417 :  383-vold            : vold:initUser0:END, rtn =114045.634494 :  332-init            : INIT:post-fs-data14234.270956 :  332-init            : post-fs-data: on modem start14773.563803 :  332-init            : INIT:zygote-start14779.084342 :  332-init            : INIT:early-boot15367.068189 :  590-ccci_mdinit     : ccci_md1: md_init srv start15369.194958 :  592-ccci_mdinit     : ccci_md3: md_init srv start15425.793036 :  332-init            : INIT:boot15456.421959 :  590-ccci_mdinit     : ccci_md1: init15459.960882 :  590-ccci_mdinit     : ccci_md1: decpyt ready15460.036882 :  590-ccci_mdinit     : ccci_md1: decpyt ready15491.400036 :  590-ccci_mdinit     : ccci_md1: reset15628.148190 :  332-init            : initcall: init_module [fpsgo]   137.634462ms15810.314421 :  590-ccci_mdinit     : ccci_md1: bootup16240.760653 :  526-zygote64        : boot_progress_start17183.242655 :  332-init            : probe: probe=platform_drv_probe drv=fm(g_fm_lna_pin_num [fmradio_drv])    79.054769ms17187.665270 :  332-init            : initcall: init_module [fmradio_drv]   102.634693ms17225.055424 :  590-ccci_mdinit     : ccci_md1: ready17242.688040 :  332-init            : initcall: init_module [gps_drv]    15.860769ms17661.970964 :  332-init            : initcall: init_module [wlan_drv_gen4m]    27.524769ms17720.348503 :  332-init            : USB ready17752.259580 :  332-init            : tkcore: prepare basic17759.501733 :  332-init            : tkcore: prepare sfs17772.740118 :  332-init            : tkcore: prepare service provider ta path17945.765965 :  332-init            : tkcore: prepare log file18974.990352 :  526-main            : Zygote:Preload Start18989.638198 :  527-main            : Zygote:Preload End23497.575516 :  526-main            : Zygote:Preload 12110 classes in 4351ms23586.100363 :  526-main            : Zygote:Preload 64 obtain resources in 31ms23593.214824 :  526-main            : Zygote:Preload 2 resources in 1ms24031.768056 :  526-main            : Zygote:Preload End24757.054289 : 1179-system_server   : Android:SysServerInit_START26168.231753 : 1179-system_server   : Android:PackageManagerService_Start26828.782370 : 1179-system_server   : Android:PMS_scan_START29656.295762 : 1179-system_server   : Android:PMS_scan_data:/product/overlay29843.735147 : 1179-system_server   : Android:PMS_scan_data:/vendor/overlay29867.384378 : 1179-system_server   : Android:PMS_scan_data:/system/framework29996.720455 : 1179-system_server   : Android:PMS_scan_data:/system/priv-app30629.102072 : 1179-system_server   : Android:PMS_scan_data:/system/app31010.800842 : 1179-system_server   : Android:PMS_scan_data:/vendor/app31057.217150 : 1179-system_server   : Android:PMS_scan_data:/product/priv-app31931.042613 : 1179-system_server   : Android:PMS_scan_data:/product/app33345.938924 : 1179-system_server   : Android:PMS_scan_data:/system/system_ext/priv-app33793.059695 : 1179-system_server   : Android:PMS_scan_data:/system/system_ext/app33852.060387 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.extservices/priv-app33887.914464 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.permission/priv-app33960.052464 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.tethering/priv-app34003.222618 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.wifi/priv-app34026.356157 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.wifi/app34063.072541 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.apex.cts.shim/priv-app34083.538003 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.apex.cts.shim/app34099.964618 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.mediaprovider/priv-app34125.925849 : 1179-system_server   : Android:PMS_scan_data:/apex/com.android.cellbroadcast/priv-app34229.835003 : 1179-system_server   : Android:PMS_scan_data:/data/app34509.224235 : 1179-system_server   : Android:PMS_scan_END34583.373312 : 1179-system_server   : PMS:reconcileAppsDataLI35049.474621 : 1179-system_server   : Android:PMS_READY37814.033320 :  527-main            : Zygote:Preload 12110 classes in 2081ms37913.899858 :  527-main            : Zygote:Preload 64 obtain resources in 49ms37923.320935 :  527-main            : Zygote:Preload 2 resources in 1ms38977.395861 : 1179-system_server   : AMS:systemReady39009.082630 : 1179-system_server   : AMS:AMS_READY39131.816707 : 1210-ActivityManager : AP_Init:[service]:[com.android.bluetooth]:[{com.android.bluetooth/com.android.bluetooth.btservice.AdapterService}]:pid:137339203.806554 : 1210-ActivityManager : AP_Init:[service]:[com.android.systemui]:[{com.android.systemui/com.android.systemui.ImageWallpaper}]:pid:1393:(PersistAP)39412.830631 : 1179-system_server   : Keyguard bindService39418.356785 : 1179-system_server   : Keyguard started39470.263324 : 1179-system_server   : SystemServer:NetworkStatsService systemReady39574.532478 : 1179-system_server   : SystemServer:ConnectivityService systemReady39587.080862 : 1210-ActivityManager : AP_Init:[null]:[WebViewLoader-armeabi-v7a]:pid:145339626.078324 : 1210-ActivityManager : AP_Init:[null]:[WebViewLoader-arm64-v8a]:pid:146839759.251786 : 1179-system_server   : SystemServer:NetworkPolicyManagerServ systemReady40003.385863 : 1179-system_server   : SystemServer:PhaseThirdPartyAppsCanStart40004.218786 : 1210-ActivityManager : AP_Init:[service]:[com.android.networkstack.process]:[{com.google.android.networkstack/com.android.server.NetworkStackService}]:pid:1534:(PersistAP)40334.872710 : 1179-system_server   : Android:SysServerInit_END40336.247864 : 1210-ActivityManager : AP_Init:[added application]:[com.mediatek.smartratswitch]:[com.mediatek.smartratswitch]:pid:1565:(PersistAP)40447.087403 : 1210-ActivityManager : AP_Init:[added application]:[com.android.se]:[com.android.se]:pid:1614:(PersistAP)40518.458788 : 1210-ActivityManager : AP_Init:[added application]:[com.android.phone]:[com.android.phone]:pid:1657:(PersistAP)40571.670480 : 1210-ActivityManager : AP_Init:[top-activity]:[com.android.settings]:[{com.android.settings/com.android.settings.FallbackHome}]:pid:168740622.470557 : 1210-ActivityManager : AP_Init:[service]:[com.google.android.ext.services]:[{com.google.android.ext.services/android.ext.services.autofill.InlineSuggestionRenderServiceImpl}]:pid:169841218.807251 : 1210-ActivityManager : AP_Init:[service]:[com.android.launcher3]:[{com.android.launcher3/com.android.quickstep.TouchInteractionService}]:pid:182041422.496713 : 1201-android.display : AMS:ENABLE_SCREEN41800.870714 : 1210-ActivityManager : AP_Init:[broadcast]:[com.google.android.gms.persistent]:[{com.google.android.gms/com.google.android.gms.chimera.GmsIntentOperationService$PersistentTrustedReceiver}]:pid:189342989.100332 : 1199-android.ui      : Keyguard connected44476.291951 : 2030-Binder:1179_A   : Keyguard onDrawn44809.040029 : 1210-ActivityManager : AP_Init:[service]:[com.google.android.inputmethod.latin]:[{com.google.android.inputmethod.latin/com.android.inputmethod.latin.LatinIME}]:pid:206145047.793029 : 1210-ActivityManager : AP_Init:[on-hold]:[com.google.android.apps.wellbeing]:pid:208745097.569183 : OFF
----------------------------------------

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