Android系統日誌 我們經常需要查看設備裡面的各種日誌信息。所以有必要瞭解android系統裡面有哪些日誌，以及用什麼方式可以提取這些日誌。以我手頭的紅米note4xplus為例，其基本配置為高通msm8953,android7.0。我們可以看一下根文件系統： mido:/ # ls acct ...
Android系統日誌
目錄
我們經常需要查看設備裡面的各種日誌信息。所以有必要瞭解android系統裡面有哪些日誌，以及用什麼方式可以提取這些日誌。以我手頭的紅米note4xplus為例，其基本配置為高通msm8953,android7.0。我們可以看一下根文件系統：
mido:/ # ls
acct init.carrier.rc init.qcom.sh root
bin init.class_main.sh init.qcom.syspart_fixup.sh sbin
bt_firmware init.environ.rc init.qcom.usb.rc sdcard
cache init.mdm.sh init.qcom.usb.sh seapp_contexts
charger init.miui.cust.rc init.rc selinux_version
config init.miui.early_boot.sh init.recovery.hardware.rc sepolicy
cust init.miui.google_revenue_share.rc init.target.rc service_contexts
d init.miui.google_revenue_share_v2.rc init.usb.configfs.rc storage
data init.miui.nativedebug.rc init.usb.rc sys
default.prop init.miui.post_boot.sh init.zygote32.rc system
dev init.miui.rc init.zygote64_32.rc tombstones
dsp init.msm.usb.configfs.rc mnt ueventd.qcom.rc
etc init.qcom.class_core.sh oem ueventd.rc
file_contexts.bin init.qcom.early_boot.sh persist unlock_key
firmware init.qcom.factory.rc proc vendor
fstab.qcom init.qcom.rc property_contexts verity_key
init init.qcom.sensors.sh res
以這個設備的文件系統為基礎，我們來看一下一般的android設備中都有那些系統日誌。
本文檔只做日誌相關的概要說明，不具體說明每個工具的使用方法。
1 日誌命令
android設備預設的命令一般都在/system/bin, /system/xbin和/sbin目錄下。我們選擇幾個常用的命令來做個說明。
atrace
實際上就是systrace的代理。用來抓取用戶空間服務日誌信息。
一般用法：
adb shell atrace sched freq idle gfx view sync -b 96000 -f atrace.log
命令幫助：
adb shell atrace --help
usage: atrace [options] [categories...]
options include:
-a appname enable app-level tracing for a comma separated list of cmdlines
-b N use a trace buffer size of N KB
-c trace into a circular buffer
-f filename use the categories written in a file as space-separated
values in a line
-k fname,... trace the listed kernel functions
-n ignore signals
-s N sleep for N seconds before tracing [default 0]
-t N trace for N seconds [defualt 5]
-z compress the trace dump
--async_start start circular trace and return immediatly
--async_dump dump the current contents of circular trace buffer
--async_stop stop tracing and dump the current contents of circular
trace buffer
--stream stream trace to stdout as it enters the trace buffer
Note: this can take significant CPU time, and is best
used for measuring things that are not affected by
CPU performance, like pagecache usage.
--list_categories
list the available tracing categories
-o filename write the trace to the specified file instead
of stdout.
所有的業務類型列表：
adb shell atrace --list_categories
gfx - Graphics
input - Input
view - View System
webview - WebView
wm - Window Manager
am - Activity Manager
sm - Sync Manager
audio - Audio
video - Video
camera - Camera
hal - Hardware Modules
app - Application
res - Resource Loading
dalvik - Dalvik VM
rs - RenderScript
bionic - Bionic C Library
power - Power Management
pm - Package Manager
ss - System Server
database - Database
sched - CPU Scheduling
irq - IRQ Events
freq - CPU Frequency
idle - CPU Idle
disk - Disk I/O
mmc - eMMC commands
load - CPU Load
sync - Synchronization
workq - Kernel Workqueues
memreclaim - Kernel Memory Reclaim
regulators - Voltage and Current Regulators
binder_driver - Binder Kernel driver
binder_lock - Binder global lock trace
pagecache - Page cache
bootstat
查看設備啟動狀態信息。
adb shell bootstat -p
Boot events:
------------
post_decrypt_time_elapsed 12
build_date 1567090617
boot_decryption_complete 26
ota_boot_complete_post_decrypt 182
ota_boot_complete 223
boot_reason 1
factory_reset_current_time 1656123419
factory_reset 1651199117
boot_complete_post_decrypt 14
boot_complete 26
factory_reset_record_value 1651199117
time_since_factory_reset 4924302
bugreport
bugreport是一個集大成的日誌命令，會將系統中所有緩存的日誌信息分門別類的導出來。
這個命令有兩個版本：bugreport和bugreportz。後面命令的差別是將日誌壓縮成zip文件。
一般使用方式：
adb shell bugreport bugreport.log
日誌導出時間很長，一般需要幾分鐘，日誌的文件也很大，最少幾十MB。
bugreport日誌有多種GUI分析工具，除了battery historian之外，還有chkBugreport等工具。
debuggerd & debuggerd64
這個命令用來收集指定進程的堆棧日誌信息，並將日誌信息寫入到/data/tombstones/tombstone_xx文件中。
一般用法：
debuggerd64 3006
Sending request to dump task 3006.
Tombstone written to: /data/tombstones/tombstone_00
dmesg
顯示內核緩衝區日誌信息。
一般用法：
dmesg --help
usage: dmesg [-c] [-r|-t] [-n LEVEL] [-s SIZE]
Print or control the kernel ring buffer.
-c Clear the ring buffer after printing
-n Set kernel logging LEVEL (1-9)
-r Raw output (with <level markers>)
-s Show the last SIZE many bytes
-t Don't print kernel's timestamps
dumpstate
dumpstate命令用來dump系統的運行狀態信息。bugreport的報告信息實際上就是dumpstate導出的。
dumpstate --help
usage: dumpstate [-h] [-b soundfile] [-e soundfile] [-o file [-d] [-p] [-z]] [-s] [-S] [-q] [-B] [-P] [-R] [-V version]
-h: display this help message
-b: play sound file instead of vibrate, at beginning of job
-e: play sound file instead of vibrate, at end of job
-o: write to file (instead of stdout)
-d: append date to filename (requires -o)
-p: capture screenshot to filename.png (requires -o)
-z: generate zipped file (requires -o)
-s: write output to control socket (for init)
-S: write file location to control socket (for init; requires -o and -z) -q: disable vibrate
-B: send broadcast when finished (requires -o)
-P: send broadcast when started and update system properties on progress (requires -o and -B)
-R: take bugreport in remote mode (requires -o, -z, -d and -B, shouldn't be used with -P)
-V: sets the bugreport format version (valid values: 1.0)
dumpsys
dumpsys命令用來dump所有運行的服務狀態信息。
dumpsys --help
usage: dumpsys
To dump all services.
or:
dumpsys [-t TIMEOUT] [--help | -l | --skip SERVICES | SERVICE [ARGS]]
--help: shows this help
-l: only list services, do not dump them
-t TIMEOUT: TIMEOUT to use in seconds instead of default 10 seconds
--skip SERVICES: dumps all services but SERVICES (comma-separated list)
SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it
dumpsys -l
Currently running services:
DisplayFeatureControl
DockObserver
MiuiBackup
MiuiInit
ProcessManager
SurfaceFlinger
accessibility
account
activity
alarm
android.hardware.fingerprint.IFingerprintDaemon
android.security.keystore
android.service.gatekeeper.IGateKeeperService
android.vendor.fido.IFidoDaemon
appops
appwidget
assetatlas
audio
backup
battery
batteryproperties
batterystats
bluetooth_manager
carrier_config
clipboard
cneservice
com.qualcomm.location.izat.IzatService
com.qualcomm.qti.qseeproxy
com.xiaomi.mlipayservice
com.xiaomi.mtservice
com.xiaomi.vsimservice
commontime_management
connectivity
connectivity_metrics_logger
consumer_ir
content
contexthub_service
country_detector
cpuinfo
dbinfo
device_policy
deviceidle
devicestoragemonitor
diskstats
display
display.qservice
dns_listener
dreams
drm.drmManager
dropbox
ethernet
extphone
fingerprint
fingerprints_service
gfxinfo
gpu
graphicsstats
hardware_properties
imms
ims
input
input_method
iphonesubinfo
isms
isub
jobscheduler
launcherapps
location
locationpolicy
lock_settings
media.audio_flinger
media.audio_policy
media.camera
media.camera.proxy
media.codec
media.drm
media.extractor
media.player
media.radio
media.resource_manager
media.sound_trigger_hw
media_projection
media_router
media_session
meminfo
midi
miui.contentcatcher.ContentCatcherService
miui.face.FaceService
miui.fdpp
miui.mqsas.IMQSNative
miui.mqsas.MQSService
miui.security.keystore
miui.sedc
miui.shell
miui.whetstone.klo
miui.whetstone.mcd
miui.whetstone.power
mount
netd
netpolicy
netstats
network_management
network_score
network_time_update_service
notification
otadexopt
package
perfshielder
permission
persistent_data_block
phone
pinner
power
print
processinfo
procstats
qti.ims.connectionmanagerservice
qti.ims.ext
qtitetherservice
recovery
restrictions
rttmanager
samplingprofiler
scheduling_policy
search
security
sensorservice
serial
servicediscovery
shortcut
simphonebook
sip
soundtrigger
statusbar
telecom
telephony.registry
textservices
trust
uimode
updatelock
usagestats
usb
user
vendor.qcom.PeripheralManager
vibrator
voiceinteraction
vrmanager
wallpaper
webviewupdate
whetstone.activity
wifi
wifip2p
wifiscanner
window
xiaomi.joyose
logcat
最常用的日誌命令。用來實時顯示日誌緩衝區信息。
一般用法：
logcat --help
Usage: logcat [options] [filterspecs]
options include:
-s Set default filter to silent.
Like specifying filterspec '*:S'
-f <filename> Log to file. Default is stdout
--file=<filename>
-r <kbytes> Rotate log every kbytes. Requires -f
--rotate-kbytes=<kbytes>
-n <count> Sets max number of rotated logs to <count>, default 4
--rotate-count=<count>
-v <format> Sets the log print format, where <format> is:
--format=<format>
brief color epoch long monotonic printable process raw
tag thread threadtime time uid usec UTC year zone
-D print dividers between each log buffer
--dividers
-c clear (flush) the entire log and exit
--clear
-d dump the log and then exit (don't block)
-e <expr> only print lines where the log message matches <expr>
--regex <expr> where <expr> is a regular expression
-m <count> quit after printing <count> lines. This is meant to be
--max-count=<count> paired with --regex, but will work on its own.
--print paired with --regex and --max-count to let content bypass
regex filter but still stop at number of matches.
-t <count> print only the most recent <count> lines (implies -d)
-t '<time>' print most recent lines since specified time (implies -d)
-T <count> print only the most recent <count> lines (does not imply -d)
-T '<time>' print most recent lines since specified time (not imply -d)
count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'
'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format
-g get the size of the log's ring buffer and exit
--buffer-size
-G <size> set size of log ring buffer, may suffix with K or M.
--buffer-size=<size>
-L dump logs from prior to last reboot
--last
-b <buffer> Request alternate ring buffer, 'main', 'system', 'radio',
--buffer=<buffer> 'events', 'crash', 'default' or 'all'. Multiple -b
parameters are allowed and results are interleaved. The
default is -b main -b system -b crash.
-B output the log in binary.
--binary
-S output statistics.
--statistics
-p print prune white and ~black list. Service is specified as
--prune UID, UID/PID or /PID. Weighed for quicker pruning if prefix
with ~, otherwise weighed for longevity if unadorned. All
other pruning activity is oldest first. Special case ~!
represents an automatic quicker pruning for the noisiest
UID as determined by the current statistics.
-P '<list> ...' set prune white and ~black list, using same format as
--prune='<list> ...' printed above. Must be quoted.
--pid=<pid> Only prints logs from the given pid.
--wrap Sleep for 2 hours or when buffer about to wrap whichever
comes first. Improves efficiency of polling by providing
an about-to-wrap wakeup.
filterspecs are a series of
<tag>[:priority]
where <tag> is a log component tag (or * for all) and priority is:
V Verbose (default for <tag>)
D Debug (default for '*')
I Info
W Warn
E Error
F Fatal
S Silent (suppress all output)
'*' by itself means '*:D' and <tag> by itself means <tag>:V.
If no '*' filterspec or -s on command line, all filter defaults to '*:V'.
eg: '*:S <tag>' prints only <tag>, '<tag>:S' suppresses all <tag> log messages.
If not specified on the command line, filterspec is set from ANDROID_LOG_TAGS.
If not specified with -v on command line, format is set from ANDROID_PRINTF_LOG
or defaults to "threadtime"
vmstat
vmstat 命令報告關於內核線程、虛擬記憶體、磁碟和 CPU 活動的統計信息。
這個命令用來持續跟蹤系統抖動相關的性能非常有幫助。
vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 357784 748532 13068 639784 4 9 35 16 0 61 1 1 97 0
vmstat -n 3 9
0 0 357784 748564 13124 639792 4 8 35 15 0 61 1 1 97 0
0 0 357784 748316 13156 639792 0 0 0 68 0 244 0 0 99 0
0 0 357784 748316 13156 639792 0 0 0 10 0 109 0 0 100 0
0 0 357784 748316 13164 639792 0 0 0 14 0 155 0 0 100 0
0 0 357784 748316 13164 639792 0 0 0 0 0 132 0 0 100 0
0 0 357784 748316 13164 639792 0 0 0 11 0 122 0 0 100 0
0 0 357784 748316 13172 639792 0 0 0 14 0 189 0 0 100 0
1 0 357784 748316 13172 639792 0 0 0 0 0 118 0 0 100 0
0 0 357784 748316 13180 639792 0 0 0 14 0 120 0 0 100 0
lsof
這個命令列出當前系統打開了那些文件。
命令輸出的結果非常長。
lsof --help
usage: lsof [-lt] [-p PID1,PID2,...] [NAME]...
Lists open files. If names are given on the command line, only
those files will be shown.
-l list uids numerically
-p for given comma-separated pids only (default all pids)
-t terse (pid only) output
netstat
監聽網路信息。
netstat
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 1 0 ::ffff:192.168.0.101:42 ::ffff:47.103.16.184:ht CLOSE_WAIT
tcp 0 0 ::ffff:192.168.0.101:39 ::ffff:111.202.1.250:ht ESTABLISHED
tcp 1 0 ::ffff:192.168.0.101:42 ::ffff:47.103.16.184:ht CLOSE_WAIT
udp 8448 0 192.168.0.101:bootpc 192.168.0.1:bootps ESTABLISHED
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ] DGRAM 1635 @suilst
unix 3 [ ] DGRAM 36778 @/data/system/xiaomi.miui.android.f6450b82f5-perfevents.perf-event-channel.sock
unix 2 [ ] DGRAM 15159 /dev/socket/qmux_radio/rild_sync_0
unix 2 [ ] DGRAM 15161 /dev/socket/qmux_radio/rild_sync_1
unix 2 [ ] DGRAM 33548 /data/misc/wifi/sockets/wpa_ctrl_716-1
......
ps
查看進程信息
ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 16332 1616 SyS_epoll_ 00004c7cf8 S /init
root 2 0 0 0 kthreadd 0000000000 S kthreadd
root 3 2 0 0 smpboot_th 0000000000 S ksoftirqd/0
root 5 2 0 0 worker_thr 0000000000 S kworker/0:0H
root 6 2 0 0 diag_socke 0000000000 S kworker/u16:0
root 7 2 0 0 rcu_gp_kth 0000000000 S rcu_preempt
root 8 2 0 0 rcu_gp_kth 0000000000 S rcu_sched
root 9 2 0 0 rcu_gp_kth 0000000000 S rcu_bh
root 10 2 0 0 nocb_leade 0000000000 S rcuop/0
root 11 2 0 0 nocb_leade 0000000000 S rcuos/0
root 12 2 0 0 nocb_leade 0000000000 S rcuob/0
root 13 2 0 0 smpboot_th 0000000000 S migration/0
root 14 2 0 0 smpboot_th 0000000000 S migration/1
......
top
實時顯示CPU消耗排名的進程信息。
top
User 1%, System 10%, IOW 0%, IRQ 0%
User 2 + Nice 0 + Sys 11 + Idle 93 + IOW 0 + IRQ 0 + SIRQ 0 = 106
PID USER PR NI CPU% S #THR VSS RSS PCY Name
9877 root 20 0 9% R 1 9112K 1884K fg top
9848 root 20 0 0% S 1 0K 0K fg kworker/u16:4
3 root 20 0 0% S 1 0K 0K fg ksoftirqd/0
5 root 0 -20 0% S 1 0K 0K fg kworker/0:0H
6 root 20 0 0% S 1 0K 0K fg kworker/u16:0
7 root 20 0 0% S 1 0K 0K fg rcu_preempt
8 root 20 0 0% S 1 0K 0K fg rcu_sched
9 root 20 0 0% S 1 0K 0K fg rcu_bh
10 root 20 0 0% S 1 0K 0K fg rcuop/0
11 root 20 0 0% S 1 0K 0K fg rcuos/0
12 root 20 0 0% S 1 0K 0K fg rcuob/0
13 root RT 0 0% S 1 0K 0K fg migration/0
free
空閑記憶體信息
free
total used free shared buffers
Mem: 2984718336 2234626048 750092288 2564096 14450688
-/+ buffers/cache: 2220175360 764542976
Swap: 1073737728 366358528 707379200
getprop
查看property屬性信息。
getprop
[DEVICE_PROVISIONED]: [1]
[acdb_id_para_version]: [AL1512-Audiopara-V26-20180420]
[af.fast_track_multiplier]: [2]
[audio.deep_buffer.media]: [true]
[audio.dolby.ds2.enabled]: [true]
[audio.dolby.ds2.hardbypass]: [true]
[audio.offload.buffer.size.kb]: [64]
[audio.offload.disable]: [true]
[audio.offload.gapless.enabled]: [true]
[audio.offload.min.duration.secs]: [15]
[audio.offload.multiaac.enable]: [true]
[audio.offload.multiple.enabled]: [false]
[audio.offload.passthrough]: [false]
[audio.offload.pcm.16bit.enable]: [true]
[audio.offload.pcm.24bit.enable]: [true]
[audio.offload.track.enable]: [true]
[audio.offload.video]: [true]
[audio.parser.ip.buffer.size]: [0]
[audio.playback.mch.downsample]: [true]
[audio.pp.asphere.enabled]: [false]
[audio.safx.pbe.enabled]: [true]
[audio_hal.period_size]: [192]
[audio_para_version]: [AL1512-Audiopara-V26-20180420]
[av.debug.disable.pers.cache]: [1]
[bluetooth.hfp.client]: [1]
[camera.clientname]: [cameraserver]
[camera.display.lmax]: [1280x720]
[camera.display.umax]: [1920x1080]
[camera.hal1.packagelist]: [com.skype.raider,com.google.android.talk]
[camera.lowpower.record.enable]: [1]
[dalvik.vm.appimageformat]: [lz4]
[dalvik.vm.bg-dex2oat-threads]: [2]
[dalvik.vm.dex2oat-Xms]: [64m]
[dalvik.vm.dex2oat-Xmx]: [512m]
[dalvik.vm.dex2oat-threads]: [6]
[dalvik.vm.dexopt.secondary]: [true]
[dalvik.vm.heapgrowthlimit]: [192m]
[dalvik.vm.heapmaxfree]: [8m]
[dalvik.vm.heapminfree]: [4m]
[dalvik.vm.heapsize]: [512m]
......
高通日誌命令
# modem回調介面壓力測試
diag_callback_sample
diag_dci_sample
diag_klog
# modem log信息
diag_mdlog
diag_socket_log
diag_uart_log
subsystem_ramdump
2 日誌目錄
android系統中還有很多常用的日誌目錄。我們可以通過adb命令把這些日誌信息提取出來。
2.1 系統日誌
# 內核日誌目錄
/d
# ANR日誌
/data/anr
# bootchart日誌
/data/bootchart
# bugreport日誌文件
/data/bugreports
/data/misc/bootchart
/data/misc/boottrace
/data/misc/profman
/data/misc/trace
/data/misc/zoneinfo
/data/system/dropbox
/data/system/heapdump
/data/system/netstats
/data/system/procstats
/data/system/usagestats
# 非通用，某些平臺日誌目錄。
/data/system.log.*
/data/tombstones
# bugreport日誌文件目錄
/data/user_de/0/com.android.shell/files/bugreports
/sys/bootinfo
# 內核調試信息
/sys/kernel/debug
2.2 運行信息
很多系統的運行信息都會臨時保存在/proc系統目錄下。我們可以根據調試需要，查看相關信息。
ls -1
boot_status
buddyinfo
cgroups
cmdline
cpuinfo
crypto
device-tree
diskstats
filesystems
interrupts
iomem
ioports
irq
kallsyms
key-users
kmsg
kpagecount
kpageflags
loadavg
locks
meminfo
misc
modules
mounts
net
pagetypeinfo
partitions
schedstat
scsi
self
serial_num
softirqs
stat
swaps
sys
sysrq-trigger
thread-self
timer_list
timer_stats
tp_lockdown_info
tty
uid_cputime
uid_stat
uptime
version
vmallocinfo
vmstat
zoneinfo
2.3 cgroup信息
# 各控制組文件系統目錄
mount |grep cgroup
none on /acct type cgroup (rw,relatime,cpuacct)
none on /dev/memcg type cgroup (rw,relatime,memory)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
none on /dev/cpuset type cgroup (rw,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
none on /sys/fs/cgroup type tmpfs (rw,seclabel,relatime,size=1436904k,nr_inodes=359226,mode=750,gid=1000)
none on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
none on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
# 然後可以進入控制組目錄查看相關控制組信息
3 平臺日誌
3.1 MediaTek
MTK平臺的所有的日誌都會收集在這個目錄下：sdcard/mtklog。
MTK還有自己的專用的日誌工具來解析顯示這些日誌。比直接看日誌文件更方便。
3.2 Qualcom
QUALCOM平臺還有ramdump日誌，通過QPST工具來提取。
