Android系统 proc—cpufreq 目录，查看 CPU 电压
一、目录结构
核心内容是 cpufreq_oppidx 可用查看不同频率对应的电压，电压越低越省电。
注意电压要设置在芯片规格范围内
http://www.shafa.com/articles/zgqLgjzqmhizEYvm.html
Z91:/proc/cpufreq # ls -all
ls -all
total 0
dr-xr-xr-x 3 root root 0 2018-01-12 17:08 .
dr-xr-xr-x 432 root root 0 1970-01-01 08:00 ..
dr-xr-xr-x 2 root root 0 2018-01-12 17:08 MT_CPU_DVFS_LL
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_debug
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_dvfs_time_profile
-rw-rw---- 1 system system 0 2018-01-12 17:08 cpufreq_power_mode
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_sched_disable
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_stress_test1.MT_CPU_DVFS_LL
目录结构
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # ls -al
ls -al
total 0
dr-xr-xr-x 2 root root 0 2018-01-12 17:09 .
dr-xr-xr-x 3 root root 0 2018-01-12 17:08 ..
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_freq
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_oppidx
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_turbo_mode
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_volt1.1 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_freq
当前频率
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_freq
cat cpufreq_freq
299000 KHz
Z91:/proc/cpufreq/MT_CPU_DVFS_LL #1.2 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_oppidx
不同频率对于的电压
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_oppidx
cat cpufreq_oppidx
[MT_CPU_DVFS_LL/0]
cpufreq_oppidx = 0
0 (1274000, 118750)
1 (1235000, 118125)
2 (1196000, 116875)
3 (1170000, 116875)
4 (1105000, 115000)
5 (1053000, 113750)
6 (1001000, 112500)
7 (962000, 111875)
8 (910000, 110000)
9 (845000, 108750)
10 (702000, 105000)
11 (624000, 103125)
12 (546000, 101250)
13 (416000, 98125)
14 (338000, 96250)
15 (299000, 95000)
===========================================
Z91:/proc/gpufreq # cat gpufreq_opp_dump
cat gpufreq_opp_dump
[0] freq = 450000, volt = 115000, idx = 0
[1] freq = 400000, volt = 111875, idx = 1
[2] freq = 350000, volt = 108750, idx = 2
[3] freq = 290000, volt = 105000, idx = 31.3 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_turbo_mode
无数据
1.4 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_volt
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_volt
cat cpufreq_volt
Vproc: 950000 uV
Vsram: 1150000 uV2.cpufreq_debug
Z91:/proc/cpufreq # cat cpufreq_debug
cat cpufreq_debug
cpufreq debug (log level) = 03.cpufreq_dvfs_time_profile
Z91:/proc/cpufreq # cat cpufreq_dvfs_time_profile
cat cpufreq_dvfs_time_profile
max[0] = 30970 us
max[1] = 18437 us
max[2] = 0 us
max[3] = 0 us
max[4] = 0 us
max[5] = 0 us4.cpufreq_power_mode
Z91:/proc/cpufreq # cat cpufreq_power_mode
cat cpufreq_power_mode
Default(Normal) mode5.cpufreq_sched_disable
Z91:/proc/cpufreq # cat cpufreq_sched_disable
cat cpufreq_sched_disable
cpufreq_sched_disable = 16.cpufreq_stress_test
Z91:/proc/cpufreq # cat cpufreq_stress_test
cat cpufreq_stress_test
0一、目录结构
核心内容是 cpufreq_oppidx 可用查看不同频率对应的电压，电压越低越省电。
注意电压要设置在芯片规格范围内
http://www.shafa.com/articles/zgqLgjzqmhizEYvm.html
Z91:/proc/cpufreq # ls -all
ls -all
total 0
dr-xr-xr-x 3 root root 0 2018-01-12 17:08 .
dr-xr-xr-x 432 root root 0 1970-01-01 08:00 ..
dr-xr-xr-x 2 root root 0 2018-01-12 17:08 MT_CPU_DVFS_LL
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_debug
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_dvfs_time_profile
-rw-rw---- 1 system system 0 2018-01-12 17:08 cpufreq_power_mode
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_sched_disable
-rw-rw-r-- 1 root root 0 2018-01-12 17:08 cpufreq_stress_test1.MT_CPU_DVFS_LL
目录结构
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # ls -al
ls -al
total 0
dr-xr-xr-x 2 root root 0 2018-01-12 17:09 .
dr-xr-xr-x 3 root root 0 2018-01-12 17:08 ..
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_freq
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_oppidx
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_turbo_mode
-rw-rw-r-- 1 root root 0 2018-01-12 17:09 cpufreq_volt1.1 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_freq
当前频率
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_freq
cat cpufreq_freq
299000 KHz
Z91:/proc/cpufreq/MT_CPU_DVFS_LL #1.2 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_oppidx
不同频率对于的电压
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_oppidx
cat cpufreq_oppidx
[MT_CPU_DVFS_LL/0]
cpufreq_oppidx = 0
0 (1274000, 118750)
1 (1235000, 118125)
2 (1196000, 116875)
3 (1170000, 116875)
4 (1105000, 115000)
5 (1053000, 113750)
6 (1001000, 112500)
7 (962000, 111875)
8 (910000, 110000)
9 (845000, 108750)
10 (702000, 105000)
11 (624000, 103125)
12 (546000, 101250)
13 (416000, 98125)
14 (338000, 96250)
15 (299000, 95000)
===========================================
Z91:/proc/gpufreq # cat gpufreq_opp_dump
cat gpufreq_opp_dump
[0] freq = 450000, volt = 115000, idx = 0
[1] freq = 400000, volt = 111875, idx = 1
[2] freq = 350000, volt = 108750, idx = 2
[3] freq = 290000, volt = 105000, idx = 31.3 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_turbo_mode
无数据
1.4 /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_volt
Z91:/proc/cpufreq/MT_CPU_DVFS_LL # cat cpufreq_volt
cat cpufreq_volt
Vproc: 950000 uV
Vsram: 1150000 uV2.cpufreq_debug
Z91:/proc/cpufreq # cat cpufreq_debug
cat cpufreq_debug
cpufreq debug (log level) = 03.cpufreq_dvfs_time_profile
Z91:/proc/cpufreq # cat cpufreq_dvfs_time_profile
cat cpufreq_dvfs_time_profile
max[0] = 30970 us
max[1] = 18437 us
max[2] = 0 us
max[3] = 0 us
max[4] = 0 us
max[5] = 0 us4.cpufreq_power_mode
Z91:/proc/cpufreq # cat cpufreq_power_mode
cat cpufreq_power_mode
Default(Normal) mode5.cpufreq_sched_disable
Z91:/proc/cpufreq # cat cpufreq_sched_disable
cat cpufreq_sched_disable
cpufreq_sched_disable = 16.cpufreq_stress_test
Z91:/proc/cpufreq # cat cpufreq_stress_test
cat cpufreq_stress_test
0