[raspberry pi4]拿到raspberry pi4(Raspbian GNU/Linux 11 (bullseye))之后,如何熟悉单板-3

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35 阅读6分钟

常用命令

./cat_files.sh /sys/devices/system/cpu/cpu0/cpufreq

cat file: /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus
0 1 2 3
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
600000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
1500000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
600000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency
4294967295
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/related_cpus
0 1 2 3
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
600000 700000 800000 900000 1000000 1100000 1200000 1300000 1400000 1500000 
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
conservative ondemand userspace powersave performance schedutil 
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
600000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
cpufreq-dt
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
ondemand
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
1500000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
600000
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
<unsupported>
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/stats/reset
cat: /sys/devices/system/cpu/cpu0/cpufreq/stats/reset: Permission denied
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state
600000 248590
700000 8735
800000 1587
900000 689
1000000 337
1100000 0
1200000 0
1300000 0
1400000 0
1500000 25685
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/stats/total_trans
991
===================
cat file: /sys/devices/system/cpu/cpu0/cpufreq/stats/trans_table
   From  :    To
         :    600000    700000    800000    900000   1000000   1100000   1200000   1300000   1400000   1500000 
   600000:         0       299        67        18        21         0         0         0         0        20 
   700000:       305         0        20         9         5         0         0         0         0        11 
   800000:        63        22         0         7         1         0         0         0         0         8 
   900000:        14        10         9         0         1         0         0         0         0         5 
  1000000:        11         5         3         3         0         0         0         0         0         5 
  1100000:         0         0         0         0         0         0         0         0         0         0 
  1200000:         0         0         0         0         0         0         0         0         0         0 
  1300000:         0         0         0         0         0         0         0         0         0         0 
  1400000:         0         0         0         0         0         0         0         0         0         0 
  1500000:        31        14         2         2         0         0         0         0         0         0 
===================
#

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq

600000
700000
700000
700000

ls -al /sys/devices/platform/

total 0
drwxr-xr-x 26 root root    0 Sep 13  2022  .
drwxr-xr-x 10 root root    0 Sep 13  2022  ..
drwxr-xr-x  4 root root    0 Jun 10 10:30  3ef62cc0.nvram
drwxr-xr-x  3 root root    0 Jun 10 10:30  arm-pmu
drwxr-xr-x  4 root root    0 Jun 10 10:30  cam1_regulator
drwxr-xr-x  4 root root    0 Jun 10 10:30  cam_dummy_reg
drwxr-xr-x  3 root root    0 Jun 10 10:30  chosen
drwxr-xr-x  3 root root    0 Jun 10 10:30  cpufreq-dt
drwxr-xr-x  4 root root    0 Sep 13  2022  emmc2bus
drwxr-xr-x  4 root root    0 Jun 10 10:30 'Fixed MDIO bus.0'
drwxr-xr-x  4 root root    0 Jun 10 10:30  fixedregulator_3v3
drwxr-xr-x  4 root root    0 Jun 10 10:30  fixedregulator_5v0
drwxr-xr-x  5 root root    0 Jun 10 10:30  gpu
drwxr-xr-x  3 root root    0 Jun 10 10:30  kgdboc
drwxr-xr-x  4 root root    0 Jun 10 10:30  leds
drwxr-xr-x  3 root root    0 Jun 10 10:30  phy
drwxr-xr-x  2 root root    0 Jun 10 11:01  power
drwxr-xr-x  4 root root    0 Jun 10 10:30  reg-dummy
drwxr-xr-x  3 root root    0 Jun 10 10:30  regulatory.0
drwxr-xr-x  7 root root    0 Jun 10 10:30  scb
drwxr-xr-x  4 root root    0 Jun 10 10:30  sd_io_1v8_reg
drwxr-xr-x  4 root root    0 Jun 10 10:30  sd_vcc_reg
drwxr-xr-x  3 root root    0 Jun 10 10:30  snd-soc-dummy
drwxr-xr-x 34 root root    0 Jun 10 10:30  soc
drwxr-xr-x  3 root root    0 Jun 10 10:30  timer
-rw-r--r--  1 root root 4096 Jun 10 10:30  uevent
drwxr-xr-x  4 root root    0 Jun 10 10:30  v3dbus
nisy@raspberrypi:~ $

thermal

nisy@raspberrypi:/sys/devices/virtual $ ls -al /sys/devices/virtual/thermal/

total 0
drwxr-xr-x  3 root root 0 Jun 10 10:30 .
drwxr-xr-x 20 root root 0 Sep 13  2022 ..
drwxr-xr-x  4 root root 0 Jun 10 10:30 thermal_zone0

nisy@raspberrypi:/sys/devices/virtual/thermal $ ls -al /sys/devices/virtual/thermal/thermal_zone0/

total 0
drwxr-xr-x 4 root root    0 Jun 10 10:30 .
drwxr-xr-x 3 root root    0 Jun 10 10:30 ..
-r--r--r-- 1 root root 4096 Jun 10 10:47 available_policies
drwxr-xr-x 3 root root    0 Jun 10 10:30 hwmon0
-rw-r--r-- 1 root root 4096 Jun 10 10:47 integral_cutoff
-rw-r--r-- 1 root root 4096 Jun 10 10:47 k_d
-rw-r--r-- 1 root root 4096 Jun 10 10:47 k_i
-rw-r--r-- 1 root root 4096 Jun 10 10:47 k_po
-rw-r--r-- 1 root root 4096 Jun 10 10:47 k_pu
-rw-r--r-- 1 root root 4096 Jun 10 10:47 mode
-rw-r--r-- 1 root root 4096 Jun 10 10:47 offset
-rw-r--r-- 1 root root 4096 Jun 10 10:47 policy
drwxr-xr-x 2 root root    0 Jun 10 10:47 power
-rw-r--r-- 1 root root 4096 Jun 10 10:47 slope
lrwxrwxrwx 1 root root    0 Jun 10 10:30 subsystem -> ../../../../class/thermal
-rw-r--r-- 1 root root 4096 Jun 10 10:47 sustainable_power
-r--r--r-- 1 root root 4096 Jun 10 10:47 temp
-rw-r--r-- 1 root root 4096 Jun 10 10:47 trip_point_0_hyst
-r--r--r-- 1 root root 4096 Jun 10 10:47 trip_point_0_temp
-r--r--r-- 1 root root 4096 Jun 10 10:47 trip_point_0_type
-r--r--r-- 1 root root 4096 Jun 10 10:47 type
-rw-r--r-- 1 root root 4096 Jun 10 10:30 uevent

$ ./cat_files.sh /sys/devices/virtual/thermal

cat file: /sys/devices/virtual/thermal/thermal_zone0/available_policies
step_wise 
===================

cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/name
cpu_thermal
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/autosuspend_delay_ms
cat: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/autosuspend_delay_ms: Input/output error
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/control
auto
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/runtime_active_time
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/runtime_status
unsupported
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/power/runtime_suspended_time
0
===================

cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/temp1_crit
110000
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/temp1_input
44303
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/hwmon0/uevent
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/integral_cutoff
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/k_d
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/k_i
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/k_po
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/k_pu
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/mode
enabled
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/offset
410040
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/policy
step_wise
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/power/autosuspend_delay_ms
cat: /sys/devices/virtual/thermal/thermal_zone0/power/autosuspend_delay_ms: Input/output error
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/power/control
auto
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/power/runtime_active_time
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/power/runtime_status
unsupported
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/power/runtime_suspended_time
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/slope
-487
===================

cat file: /sys/devices/virtual/thermal/thermal_zone0/sustainable_power
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/temp
43816
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_hyst
0
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp
110000
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_type
critical
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/type
cpu-thermal
===================
cat file: /sys/devices/virtual/thermal/thermal_zone0/uevent
===================
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