| Kconfig (818b930bc15077fc00ff16bb22c5df1857f05afa) | Kconfig (1e15f295408e21873dba5fdf17efcbd05fcb6729) |
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| 1menu "CPU Frequency scaling" 2 3config CPU_FREQ 4 bool "CPU Frequency scaling" 5 help 6 CPU Frequency scaling allows you to change the clock speed of 7 CPUs on the fly. This is a nice method to save power, because 8 the lower the CPU clock speed, the less power the CPU consumes. --- 6 unchanged lines hidden (view full) --- 15 16 If in doubt, say N. 17 18if CPU_FREQ 19 20config CPU_FREQ_TABLE 21 tristate 22 | 1menu "CPU Frequency scaling" 2 3config CPU_FREQ 4 bool "CPU Frequency scaling" 5 help 6 CPU Frequency scaling allows you to change the clock speed of 7 CPUs on the fly. This is a nice method to save power, because 8 the lower the CPU clock speed, the less power the CPU consumes. --- 6 unchanged lines hidden (view full) --- 15 16 If in doubt, say N. 17 18if CPU_FREQ 19 20config CPU_FREQ_TABLE 21 tristate 22 |
| 23config CPU_FREQ_GOV_COMMON 24 bool 25 |
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| 23config CPU_FREQ_STAT 24 tristate "CPU frequency translation statistics" 25 select CPU_FREQ_TABLE 26 default y 27 help 28 This driver exports CPU frequency statistics information through sysfs 29 file system. 30 --- 105 unchanged lines hidden (view full) --- 136 137 For details, take a look at <file:Documentation/cpu-freq/>. 138 139 If in doubt, say Y. 140 141config CPU_FREQ_GOV_ONDEMAND 142 tristate "'ondemand' cpufreq policy governor" 143 select CPU_FREQ_TABLE | 26config CPU_FREQ_STAT 27 tristate "CPU frequency translation statistics" 28 select CPU_FREQ_TABLE 29 default y 30 help 31 This driver exports CPU frequency statistics information through sysfs 32 file system. 33 --- 105 unchanged lines hidden (view full) --- 139 140 For details, take a look at <file:Documentation/cpu-freq/>. 141 142 If in doubt, say Y. 143 144config CPU_FREQ_GOV_ONDEMAND 145 tristate "'ondemand' cpufreq policy governor" 146 select CPU_FREQ_TABLE |
| 147 select CPU_FREQ_GOV_COMMON |
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| 144 help 145 'ondemand' - This driver adds a dynamic cpufreq policy governor. 146 The governor does a periodic polling and 147 changes frequency based on the CPU utilization. 148 The support for this governor depends on CPU capability to 149 do fast frequency switching (i.e, very low latency frequency 150 transitions). 151 152 To compile this driver as a module, choose M here: the 153 module will be called cpufreq_ondemand. 154 155 For details, take a look at linux/Documentation/cpu-freq. 156 157 If in doubt, say N. 158 159config CPU_FREQ_GOV_CONSERVATIVE 160 tristate "'conservative' cpufreq governor" 161 depends on CPU_FREQ | 148 help 149 'ondemand' - This driver adds a dynamic cpufreq policy governor. 150 The governor does a periodic polling and 151 changes frequency based on the CPU utilization. 152 The support for this governor depends on CPU capability to 153 do fast frequency switching (i.e, very low latency frequency 154 transitions). 155 156 To compile this driver as a module, choose M here: the 157 module will be called cpufreq_ondemand. 158 159 For details, take a look at linux/Documentation/cpu-freq. 160 161 If in doubt, say N. 162 163config CPU_FREQ_GOV_CONSERVATIVE 164 tristate "'conservative' cpufreq governor" 165 depends on CPU_FREQ |
| 166 select CPU_FREQ_GOV_COMMON |
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| 162 help 163 'conservative' - this driver is rather similar to the 'ondemand' 164 governor both in its source code and its purpose, the difference is 165 its optimisation for better suitability in a battery powered 166 environment. The frequency is gracefully increased and decreased 167 rather than jumping to 100% when speed is required. 168 169 If you have a desktop machine then you should really be considering --- 40 unchanged lines hidden --- | 167 help 168 'conservative' - this driver is rather similar to the 'ondemand' 169 governor both in its source code and its purpose, the difference is 170 its optimisation for better suitability in a battery powered 171 environment. The frequency is gracefully increased and decreased 172 rather than jumping to 100% when speed is required. 173 174 If you have a desktop machine then you should really be considering --- 40 unchanged lines hidden --- |