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4.7.16. logcat

logcat is a tool used to read and display system logs, supporting multiple log buffers (such as log_main, log_system, log_radio, etc.), and can filter log output based on user-specified filtering rules.

4.7.16.1. Syntax Description

Below is the help information for executing logcat:

Usage: logcat [options] [filterspecs]
options include:
  -s              Set default filter to silent. Like specifying filterspec '*:s'
  -f <filename>   Log to file. Default to stdout
  -r [<kbytes>]   Rotate log every kbytes. (16 if unspecified). Requires -f
  -n <count>      Sets max number of rotated logs to <count>, default 4
  -v <format>     Sets the log print format, where <format> is one of:
                  brief process tag thread raw time threadtime long
  -c              clear (flush) the entire log and exit
  -d              dump the log and then exit (don't block)
  -t <count>      print only the most recent <count> lines (implies -d)
  -g              get the size of the log's ring buffer and exit
  -b <buffer>     Request alternate ring buffer, 'main', 'system', 'radio'
                  or 'events'. Multiple -b parameters are allowed and the
                  results are interleaved. The default is -b main -b system.
  -B              output the log in binary
filterspecs are a series of <tag>[:priority]
where <tag> is a log component tag (or * for all) and priority is:
  V    Verbose
  D    Debug
  I    Info
  W    Warn
  E    Error
  F    Fatal
  S    Silent (suppress all output)
'*' means '*:d' and <tag> by itself means <tag>:v
If not specified on the commandline, filterspec is set from ANDROID_LOG_TAGS.
If no filterspec is found, filter defaults to '*:I'
If not specified with -v, format is set from ANDROID_PRINTF_LOG or defaults to "brief"

4.7.16.2. Parameter Options Description

  • -s: Set the default filter to silent mode (*:s), i.e., do not display any logs.

  • -f : Output logs to a specified file instead of standard output.

  • -r []: Automatically rotate the log file every specified kilobytes (default is 16KB). Requires the -f parameter.

  • -n : Set the maximum number of rotated log files, default is 4.

  • -v : Set the log output format, possible values include:

    • brief: Brief format, displaying timestamp, priority, and tag.

    • process: Display process information.

    • tag: Display only the tag.

    • thread: Display thread information.

    • raw: Raw log format.

    • time: Display timestamp.

    • threadtime: Display thread timestamp.

    • long: Long format, displaying detailed information.

  • -c: Clear (flush) the entire log buffer and exit.

  • -d: Dump the log to standard output and then exit (non-blocking).

  • -t : Print only the most recent lines (implies -d).

  • -g: Get the size of the log buffer and exit.

  • -b : Request an alternate log buffer, options include main, radio. The -b parameter can be used multiple times, and results will be interleaved. Default is -b log_main -b log_radio.

    • The log system supports one 2MB log_main buffer and one 256KB log_radio buffer; it is recommended to use the log_main buffer.

    • Logs with LOG_TAG as “HTC_RIL”, “RIL”, “IMS”, “AT”, “GSM”, “STK”, “CDMA”, “PHONE”, “SMS” are saved to the log_radio buffer; all others are saved to the log_main buffer.

  • -B: Output logs in binary format.

  • filterspecs: Filtering rules, in the format [:priority]. Here, is the log component tag (or * for all), and priority is the log priority:

    • V: Verbose

    • D: Debug

    • I: Info

    • W: Warn

    • E: Error

    • F: Fatal

    • S: Silent (suppress all output)

    • If no filtering rule is specified, it will be read from the environment variable ANDROID_LOG_TAGS; if none is found, the default is *:I.

4.7.16.3. Command Options and Their Function Descriptions

Default Usage

Command:

root@buildroot:~# logcat

Function:

Display all log information in the default format (brief).

Print Output:

logcat test start !!!
--------- beginning of /dev/log_main
I/        ( 1053): [29.023584][hbn_vpf_interface.c]:[hbn_vnode_get_attr][532]vin0 ctx0 done
D/        ( 1053): [29.023600][camera_vpf]:[camera_vpf_vin_attr_show][982] vin_attr : flow0 disable rx with vcon
W/        ( 1053): [29.023611][camera_vpf]:[camera_vpf_vin_attr_show][994]     mipi : rx0 vc0(0) not enable
D/        ( 1053): [29.023621][camera_vpf]:[camera_vpf_vin_attr_show][997]     vcon : valid 0x5a1
D/        ( 1053): [29.023632][camera_vpf]:[camera_vpf_vin_attr_show][1007]     bus_main : 4
D/        ( 1053): [29.023642][camera_vpf]:[camera_vpf_vin_attr_show][1007]        oth_0 : 498
D/        ( 1053): [29.023651][camera_vpf]:[camera_vpf_vin_attr_show][1007]    lpwm_chn0 : 0
D/        ( 1053): [29.023664][camera_vpf]:[camera_vpf_vin_attr_show][1007]  rx_phy_mode : 1
D/        ( 1053): [29.023676][camera_vpf]:[camera_vpf_vin_attr_show][1007] rx_phy_index : 0
D/        ( 1053): [29.023684][camera_vpf]:[camera_vpf_vin_attr_show][1007]    vcon_type : 0
D/        ( 1053): [29.023697][camera_vpf]:[camera_vpf_vin_attr_show][1007]    vcon_link : 0
D/        ( 1053): [29.023727][sensor_lib]:[camera_sensor_ops_bind][524] sensor sc230ai ops bind
W/        ( 1053): [29.023745][sensor_lib]:[camera_sensor_set_cali_name][585] calib_lname is null, we will try sensor_name_tuning.json.
I/        ( 1053): [29.023792][sensor_lib]:[camera_sensor_set_cali_name][614] camera_sensor_set_cali_name port:0, calib_lname:sc230ai_tuning.json
D/        ( 1053): [29.023808][sensor_lib]:[camera_sensor_config_parse][653] sensor sc230ai 0x30 config parse
D/        ( 1053): [29.023821][sensor_lib]:[camera_sensor_config_parse][717] sensor sc230ai auto disable all diag
D/        ( 1053): [29.023869][sensor_dev]:[camera_sensor_dev_open][95] open /dev/port_0 v1.0 sc230ai as 36
D/        ( 1053): [29.024015][camera_i2c]:[camera_i2c_init][177] i2c4 mutex lock 0xffffaf591000 shmid 0
I/        ( 1053): [29.024033][camera_i2c]:[camera_i2c_init][191] i2c4 init as fd 37
D/        ( 1053): [29.024059][sensor_lib]:[camera_sensor_init][1438] sensor0 sc230ai init real doing
D/        ( 1053): [29.024097][sc230ai]:sc230ai gpio_num = 1
D/        ( 1053): [29.024111][sc230ai]:sc230ai gpio_pin[0] = 498
I/        ( 1053): [29.236275][sc230ai]:sc230ai in normal linear mode
I/        ( 1053): [29.236340][sc230ai]:bus_num = 4, sensor_addr = 0x30
I/        ( 1053): [29.325516][sc230ai]:sc230ai config success under 1 mode
I/        ( 1053): [29.425695][sc230ai]:sensor_dynamic_switch_fps sc230ai 10fps
I/        ( 1053): [29.427839][sc230ai]:sc230ai dynamic switch to 10fps success
I/        ( 1053): [29.427900][sc230ai]:enable userspace gain control and line control
D/        ( 1053): [29.428026][sensor_dev]:[camera_sensor_cdev_open][832] open /dev/sensor_ctrl v1.0 for sensor0 sc230ai as 38
I/        ( 1053): [29.428480][sc230ai]:enable userspace gain control and line control
I/        ( 1053): [29.428518][sensor_lib]:[camera_sensor_ctrl_func][1057] thread sen0_ctrl:sc230ai work en 0x3
I/        ( 1053): [29.428635][sensor_lib]:[camera_sensor_init][1534] sensor0 sc230ai init real done
I/        ( 1053): [29.428663][sensor_lib]:[camera_sensor_devop_func][1258] thread sen0:sc230ai work
W/        ( 1053): [29.428679][sensor_lib]:[camera_sensor_get_iparam][2266] sensor0 sc230ai 0x0@0.0ps state 4-NOT_SUPPORT
D/        ( 1053): [29.428711][sensor_lib]:[camera_sensor_set_sensor_info_to_driver][2316] sensor0 sc230ai set_intrinsic_param state 4-NOT_SUPPORT
W/        ( 1053): [29.428732][sensor_comm]:[camera_sensor_emode_parse][149] sensor sc230ai extra_mode 0 emode name is NULL
D/        ( 1053): [29.428747][camera_vpf]:[camera_vpf_mipi_config_parse][587] parse mipi config form user config add csi runtime
D/        ( 1053): [29.428764][camera_vpf]:[camera_vpf_mipi_config_parse][627] mipi config parse from user add csi runtime done:
D/        ( 1053): [29.428776][camera_vpf]:[camera_vpf_mipi_config_show][515] rx cfg:
D/        ( 1053): [29.428785][camera_vpf]:[camera_vpf_mipi_config_show][520]          lane: 1
D/        ( 1053): [29.428801][camera_vpf]:[camera_vpf_mipi_config_show][520]      datatype: 43
D/        ( 1053): [29.428808][camera_vpf]:[camera_vpf_mipi_config_show][520]           fps: 10
D/        ( 1053): [29.428820][camera_vpf]:[camera_vpf_mipi_config_show][520]          mclk: 24
D/        ( 1053): [29.428827][camera_vpf]:[camera_vpf_mipi_config_show][520]       mipiclk: 810
D/        ( 1053): [29.428837][camera_vpf]:[camera_vpf_mipi_config_show][520]         width: 1920
D/        ( 1053): [29.428844][camera_vpf]:[camera_vpf_mipi_config_show][520]        height: 1080
D/        ( 1053): [29.428852][camera_vpf]:[camera_vpf_mipi_config_show][520]     linelenth: 2348
D/        ( 1053): [29.428862][camera_vpf]:[camera_vpf_mipi_config_show][520]    framelenth: 3375
D/        ( 1053): [29.428871][camera_vpf]:[camera_vpf_mipi_config_show][520]        settle: 22
D/        ( 1053): [29.428881][camera_vpf]:[camera_vpf_mipi_config_show][520]   channel_num: 1
D/        ( 1053): [29.428892][sensor_lib]:[camera_sensor_csi_attr_parse][787] camera0 sc230ai csi attr rx parse: 1lane 810Mbps 0x2b
I/        ( 1053): [29.465132][hbn_vpf_interface.c]:[hbn_vnode_set_inter_attr][1191]vin0 ctx0 vnode done
D/        ( 1053): [29.630058][sensor_dev]:[camera_sensor_cdev_ioctl][933] sensor0 sc230ai ctrl ioctl SENSOR_CTRL_INFO_SYNC 0xffffadd6e730 ret -1: Operation not permitted
E/TRACE   (  589): [29.810429]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingWbIsEnabled: wrong HDR port ID 4
E/TRACE   (  589): [29.811752]LSCV3: ALscSetCurrentConfigure: index:0 lsc xSize value incorrect
E/TRACE   (  589): [29.818581]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingWbIsEnabled: wrong HDR port ID 4
I/        ( 1053): [29.819128][camera_vpf]:[camera_vpf_vin_attach_camera][1375] attach camera0 to vin 0x8765 done
D/        ( 1053): [29.819160][camera_run]:[camera_attach_to_vin][2406] camera0 sc230ai attach to vin 0x8765 done 795.616ms
I/        ( 1053): [29.819172][camera_if]:[hbn_camera_attach_to_vin][315] camera0 sc230ai attach to vin 0x8765 as vin done
I/        ( 1053): [29.819599][hbn_vpf_interface.c]:[hbn_vnode_start][1386]vs-vse0 ctx0 vnode done
E/TRACE   (  589): [29.821016]VIDEOIN-ISP-DRV: defined HORIZON_HACK_ISP test
I/        ( 1053): [29.822292][hbn_vpf_interface.c]:[hbn_vnode_start][1386]vs-isp0 ctx0 vnode done
I/        ( 1053): [29.822405][sc230ai]:sc230ai start normal / slave linear mode
D/        ( 1053): [29.822830][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 4@0x30: 0x0100 = 0x01
I/        ( 1053): [29.822851][sensor_lib]:[camera_sensor_start][1699] sensor0 sc230ai start done 0.447ms
I/        ( 1053): [29.832952][hbn_vpf_interface.c]:[hbn_vnode_start][1386]vin0 ctx0 vnode done
I/        ( 1053): [29.832968][hbn_vpf_interface.c]:[hbn_vflow_start][2610]flow 0 done
I/        ( 1053): [29.833002][hbn_vpf_interface.c]:[hbn_vnode_get_ochn_attr][929]vs-vse0 ctx0 vnode done
D/        ( 1053): [29.840048][sensor_dev]:[camera_sensor_cdev_ioctl][933] sensor0 sc230ai ctrl ioctl SENSOR_CTRL_INFO_SYNC 0xffffadd6e730 ret -1: Operation not permitted
I/        ( 1053): [29.873983][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1053): [29.874023][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 0 done
I/        ( 1053): [29.883240][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 0 done
I/        ( 1053): [29.973503][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1053): [29.973536][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 1 done
I/        ( 1053): [29.983711][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 1 done
I/        ( 1053): [30.073877][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1053): [30.073931][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 2 done
I/        ( 1053): [30.085339][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 2 done
I/        ( 1053): [30.174072][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2

Field Explanation:

  • Log Levels:

    • I: Info: Indicates normal operational messages or status updates. Example:

      • I/ ( 1053): [29.023584][hbn_vpf_interface.c]:[hbn_vnode_get_attr][532]vin0 ctx0 done.

    • D: Debug: Indicates debugging information, typically used during development and troubleshooting. Example:

      • D/ ( 1053): [29.023600][camera_vpf]:[camera_vpf_vin_attr_show][982] vin_attr : flow0 disable rx with vcon.

    • W: Warn: Indicates potential issues or items requiring attention. Example:

      • W/ ( 1053): [29.023611][camera_vpf]:[camera_vpf_vin_attr_show][994] mipi : rx0 vc0(0) not enable.

    • E: Error: Indicates serious errors or exceptional conditions. Example:

      • E/TRACE (589): [29.810429]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingWbIsEnabled: wrong HDR port ID 4.

  • Log Content:

    • Timestamp: [29.023584]: Indicates the timestamp of the log entry (in seconds, with decimals representing milliseconds).

    • File name and line number: [hbn_vpf_interface.c]:[hbn_vnode_get_attr][532]: Indicates the log originates from file hbn_vpf_interface.c, function hbn_vnode_get_attr, line 532.

    • Log Message: vin0 ctx0 done: Indicates that operation for context ctx0 of vin0 has completed; context must be interpreted based on runtime code.

Display Logs of Specific Priority

Command:

logcat *:W

Function:

Only display logs with priority Warning (W) and above.

Print Output:

root@buildroot:~# logcat *:W

  logcat test start !!!
--------- beginning of /dev/log_main
W/        ( 1053): [29.023611][camera_vpf]:[camera_vpf_vin_attr_show][994]     mipi : rx0 vc0(0) not enable
W/        ( 1053): [29.023745][sensor_lib]:[camera_sensor_set_cali_name][585] calib_lname is null, we will try sensor_name_tuning.json.
W/        ( 1053): [29.428679][sensor_lib]:[camera_sensor_get_iparam][2266] sensor0 sc230ai 0x0@0.0ps state 4-NOT_SUPPORT
W/        ( 1053): [29.428732][sensor_comm]:[camera_sensor_emode_parse][149] sensor sc230ai extra_mode 0 emode name is NULL
E/TRACE   (  589): [29.810429]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingWbIsEnabled: wrong HDR port ID 4
E/TRACE   (  589): [29.811752]LSCV3: ALscSetCurrentConfigure: index:0 lsc xSize value incorrect
E/TRACE   (  589): [29.818581]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingWbIsEnabled: wrong HDR port ID 4
E/TRACE   (  589): [29.821016]VIDEOIN-ISP-DRV: defined HORIZON_HACK_ISP test
E/TRACE   (  589): [33.564327]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingDisable: wrong HDR port ID 4

Output Logs to File

Command:

logcat -f /userdata/logfile.log

Function:

Output logs to a specified file path, for example, save the logcat logs under /userdata as logfile.log.

Print Output:

root@buildroot:/userdata# cat logfile.log
--------- beginning of /dev/log_main
I/        (  974): [OTA_INFO][veeprom_flag.c:86] veeprom crc, oricrc[637d5378], newcrc[637d5378], offset[1352]
I/        (  974): [OTA_INFO][veeprom_flag.c:396] update part num: [0]
I/        (  974): [OTA_INFO][ota_boot_control.c:304] This slot has been marked success before, no need to mark it repeatedly
I/        (  974): [OTA_INFO][ota_boot_control.c:797] set slot:0 boot success
I/        (  974): [OTA_INFO][veeprom_flag.c:86] veeprom crc, oricrc[637d5378], newcrc[637d5378], offset[1352]
I/        (  974): [OTA_INFO][veeprom_flag.c:310] veeprom: flag [0], value [3]
D/        ( 1053): [28.980268][camera_if]:[hbn_camera_create][167] create camera sc230ai
D/        ( 1053): [28.985960][camera_run]:[camera_addition_pre][205] CAM_DIAG not enable
D/        ( 1053): [28.986010][camera_run]:[camera_handle_mgr_get_id][464] get id 0 count 0
D/        ( 1053): [28.986036][camera_run]:[camera_handle_mgr_set_id][510] set id 0 camera fd 0x4331 count 1
D/        ( 1053): [28.986048][camera_hdl]:[camera_handle_malloc][114] malloc id 0 fd 0x4331
D/        ( 1053): [28.988176][camera_mod]:[camera_module_lib_pre][214] sensor sc230ai: libsc230ai.so pre sucess
D/        ( 1053): [28.988256][sensor_lib]:[camera_sensor_config_check][252] sensor sc230ai config check
D/        ( 1053): [28.988276][sensor_lib]:[camera_sensor_ko_version_check][150] sensor sc230ai v1.0.0 ko v1.0
I/        ( 1053): [28.988295][camera_if]:[hbn_camera_create][245] create 0: camera sc230ai as fd 0x4331
I/        ( 1053): [28.989544][hbn_vpf_interface.c]:[vnode_alloc_magic_fd][224]cur_index 0
I/        ( 1053): [28.989571][hbn_vpf_interface.c]:[hbn_vnode_open][312]vnode create done !
I/        ( 1053): [28.989918][hbn_vpf_interface.c]:[hbn_vnode_open][319]vin0 ctx 0 vnode open
I/        ( 1053): [28.989941][hbn_vpf_interface.c]:[hbn_vnode_set_attr][438]start
I/        ( 1053): [28.989964][hbn_vpf_interface.c]:[vnode_size_check][407]vnode_size_check vin0 done, size(412-412) matched
I/        ( 1053): [28.990608][hbn_vpf_interface.c]:[vnode_size_check][407]vnode_size_check vin0 done, size(12-12) matched
I/        ( 1053): [28.991652][hbn_vpf_interface.c]:[hbn_vnode_set_ichn_attr][1023]vin0 ctx0 vnode done
I/        ( 1053): [28.991756][hbn_vpf_interface.c]:[vnode_size_check][407]vnode_size_check vin0 done, size(76-76) matched
I/        ( 1053): [28.992119][hbn_vpf_interface.c]:[hbn_vnode_set_ochn_attr][808]vin0 ctx0 vnode done
I/        ( 1053): [28.992220][hbn_vpf_interface.c]:[vnode_size_check][407]vnode_size_check vin0 done, size(368-368) matched
I/        ( 1053): [28.992512][hbn_vpf_interface.c]:[hbn_vnode_set_attr_ex][600]vin0 ctx0 vnode done
I/        ( 1053): [28.992577][hbn_vpf_interface.c]:[vnode_alloc_magic_fd][224]cur_index 1
I/        ( 1053): [28.992617][hbn_vpf_interface.c]:[hbn_vnode_open][312]vnode create done !
I/        ( 1053): [28.994740][hbn_vpf_interface.c]:[hbn_vnode_open][319]vs-isp0 ctx 0 vnode open

Rotate Log Files

Command:

logcat -f /userdata/logfile.log -r 10 -n 5

Function:

Output logs to a specified file path, automatically rotate the log file every 10KB, and keep up to 5 rotated files.

Print Output:

root@buildroot:/userdata# cat logfile.log
I/        ( 1172): [982.596863][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx1 chn 0 bufferindex 1 done
I/        ( 1172): [982.607788][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx1 bufferindex 1 done
I/        ( 1172): [982.678711][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.678833][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 0 done
I/        ( 1172): [982.689087][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 0 done
I/        ( 1172): [982.696716][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.696838][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx1 chn 0 bufferindex 2 done
I/        ( 1172): [982.706726][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx1 bufferindex 2 done
I/        ( 1172): [982.778625][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.778687][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 1 done
I/        ( 1172): [982.788818][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 1 done
I/        ( 1172): [982.796631][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.796753][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx1 chn 0 bufferindex 0 done
I/        ( 1172): [982.807495][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx1 bufferindex 0 done
I/        ( 1172): [982.878235][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.878296][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 2 done
I/        ( 1172): [982.888489][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 2 done
I/        ( 1172): [982.896667][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [982.896729][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx1 chn 0 bufferindex 1 done
I/        ( 1172): [982.907349][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx1 bufferindex 1 done
E/TRACE   (  589): [982.973877]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingDisable: wrong HDR port ID 3
E/TRACE   (  589): [983.014832]CAMERIC-ISP-STITCHING-DRV: CamerIcIspStitchingDisable: wrong HDR port ID 4

root@buildroot:/userdata# cat logfile.log.1
D/        ( 1172): [980.151611][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae2 = 0x3f
D/        ( 1172): [980.152100][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae3 = 0x38
D/        ( 1172): [980.152588][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae4 = 0x28
D/        ( 1172): [980.153076][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae5 = 0x3f
D/        ( 1172): [980.153625][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae6 = 0x38
D/        ( 1172): [980.154114][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae7 = 0x28
D/        ( 1172): [980.154602][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae8 = 0x3f
D/        ( 1172): [980.155212][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5ae9 = 0x3c
D/        ( 1172): [980.155701][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5aea = 0x2c
D/        ( 1172): [980.156250][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5aeb = 0x3f
D/        ( 1172): [980.156738][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5aec = 0x3c
D/        ( 1172): [980.157227][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5aed = 0x2c
D/        ( 1172): [980.157715][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af4 = 0x3f
D/        ( 1172): [980.158264][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af5 = 0x38
D/        ( 1172): [980.158691][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af6 = 0x28
D/        ( 1172): [980.159241][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af7 = 0x3f
D/        ( 1172): [980.159729][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af8 = 0x38
D/        ( 1172): [980.160339][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5af9 = 0x28
D/        ( 1172): [980.160767][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5afa = 0x3f
D/        ( 1172): [980.161255][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5afb = 0x3c
D/        ( 1172): [980.161804][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5afc = 0x2c
D/        ( 1172): [980.162292][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5afd = 0x3f
D/        ( 1172): [980.162842][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5afe = 0x3c
D/        ( 1172): [980.163330][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x5aff = 0x2c
D/        ( 1172): [980.163818][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x36e9 = 0x53
D/        ( 1172): [980.164368][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x37f9 = 0x53
I/        ( 1172): [980.165649][sc230ai]:sc230ai config success under 1 mode
I/        ( 1172): [980.265808][sc230ai]:sensor_dynamic_switch_fps sc230ai 10fps
I/        ( 1172): [980.267944][sc230ai]:sc230ai dynamic switch to 10fps success
I/        ( 1172): [980.268005][sc230ai]:enable userspace gain control and line control
D/        ( 1172): [980.268188][sensor_dev]:[camera_sensor_cdev_open][832] open /dev/sensor_ctrl v1.0 for sensor4 sc230ai as 100
I/        ( 1172): [980.268616][sc230ai]:enable userspace gain control and line control
I/        ( 1172): [980.268677][sensor_lib]:[camera_sensor_ctrl_func][1057] thread sen4_ctrl:sc230ai work en 0x3
I/        ( 1172): [980.268738][sensor_lib]:[camera_sensor_init][1534] sensor4 sc230ai init real done
I/        ( 1172): [980.268799][sensor_lib]:[camera_sensor_devop_func][1258] thread sen4:sc230ai work
W/        ( 1172): [980.268799][sensor_lib]:[camera_sensor_get_iparam][2266] sensor4 sc230ai 0x0@0.0ps state 4-NOT_SUPPORT
D/        ( 1172): [980.268799][sensor_lib]:[camera_sensor_set_sensor_info_to_driver][2316] sensor4 sc230ai set_intrinsic_param state 4-NOT_SUPPORT

I/        ( 1172): [981.779480][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 0 done
I/        ( 1172): [981.789795][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 0 done
I/        ( 1172): [981.797241][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [981.797302][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx1 chn 0 bufferindex 2 done
I/        ( 1172): [981.807739][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx1 bufferindex 2 done
I/        ( 1172): [981.878845][hbn_vpf_interface.c]:[hbn_vnode_getframe][1537]invalidate buf cnt 2
I/        ( 1172): [981.878906][hbn_vpf_interface.c]:[hbn_vnode_getframe][1540]vs-vse0 ctx0 chn 0 bufferindex 1 done
I/        ( 1172): [981.889343][hbn_vpf_interface.c]:[hbn_vnode_releaseframe][2106]vs-vse0 ctx0 bufferindex 1 done

root@buildroot:/userdata# cat logfile.log.2
D/        ( 1172): [979.865479][camera_i2c]:[camera_i2c_init][177] i2c2 mutex lock 0xffff90abb000 shmid 1
I/        ( 1172): [979.865479][camera_i2c]:[camera_i2c_init][191] i2c2 init as fd 99
D/        ( 1172): [979.865479][sensor_lib]:[camera_sensor_init][1438] sensor4 sc230ai init real doing
D/        ( 1172): [979.865540][sc230ai]:sc230ai gpio_num = 1
D/        ( 1172): [979.865540][sc230ai]:sc230ai gpio_pin[0] = 502
I/        ( 1172): [980.076843][sc230ai]:sc230ai in normal linear mode
I/        ( 1172): [980.076904][sc230ai]:bus_num = 2, sensor_addr = 0x30
D/        ( 1172): [980.077393][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x0103 = 0x01
D/        ( 1172): [980.077820][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x0100 = 0x00
D/        ( 1172): [980.078247][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x36e9 = 0x80
D/        ( 1172): [980.078735][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x37f9 = 0x80
D/        ( 1172): [980.079102][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x300a = 0x24
D/        ( 1172): [980.079529][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x3018 = 0x12
D/        ( 1172): [980.080017][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x3019 = 0x0e
D/        ( 1172): [980.080505][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x301f = 0x62
D/        ( 1172): [980.080872][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x3032 = 0xa0
D/        ( 1172): [980.081360][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x320c = 0x09
D/        ( 1172): [980.081848][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x320d = 0x60
D/        ( 1172): [980.082397][camera_reg]:[camera_reg_i2c_write_array][337] rega W16 2@0x30: 0x3225 = 0x30
....

Clear Log Buffer

Command:

logcat -c

Function:

Clear the entire log buffer and exit.

Print Output:

root@buildroot:/userdata# logcat -c

  logcat test start !!!
root@buildroot:/userdata# logcat

  logcat test start !!!
--------- beginning of /dev/log_main

Get Log Buffer Size

Command:

logcat -g

Function:

Get the size of the log buffer and exit.

Print Output:

root@buildroot:/userdata# logcat -g

  logcat test start !!!
/dev/log_main: ring buffer is 2048Kb (0Kb consumed), max entry is 5120b, max payload is 4076b

Display Logs from Specific Buffer

For examples of logcat displaying logs from specific buffers, please refer to the logcat Interface section.

Command:

logcat -b log_radio

Function:

Display logs from the log_radio buffer.

logcat -b log_system

Function:

Display logs from the log_system buffer.