Difference between revisions of "CPU"
From FriendlyELEC WiKi
(Created page with "==S5P4418/S5P6818 降低CPU频率== ===Method 1=== The following command is used to temporarily limit the maximum CPU frequency to 1GHz: echo 1000000 > /sys/devices/system/cp...") |
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===Method 2=== | ===Method 2=== | ||
Modify the kernel source code: | Modify the kernel source code: | ||
| + | <syntaxhighlight lang="bash"> | ||
arch/arm/plat-s5p4418/nanopi2/device.c | arch/arm/plat-s5p4418/nanopi2/device.c | ||
| + | </syntaxhighlight> | ||
Delete the unwanted frequencies in the following array: | Delete the unwanted frequencies in the following array: | ||
| + | <syntaxhighlight lang="bash"> | ||
static unsigned long dfs_freq_table[][2] = { | static unsigned long dfs_freq_table[][2] = { | ||
{ 1400000, 1200000, }, | { 1400000, 1200000, }, | ||
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{ 400000, 940000, }, | { 400000, 940000, }, | ||
}; | }; | ||
| + | </syntaxhighlight> | ||
Revision as of 05:12, 4 August 2018
1 S5P4418/S5P6818 降低CPU频率
1.1 Method 1
The following command is used to temporarily limit the maximum CPU frequency to 1GHz: echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
1.2 Method 2
Modify the kernel source code:
arch/arm/plat-s5p4418/nanopi2/device.c
Delete the unwanted frequencies in the following array:
static unsigned long dfs_freq_table[][2] = { { 1400000, 1200000, }, { 1200000, 1120000, }, { 1000000, 1040000, }, { 800000, 1000000, }, { 700000, 940000, }, { 600000, 940000, }, { 500000, 940000, }, { 400000, 940000, }, };
