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| wiki:cpu_frequency_scaling_basics [2012/12/01 06:08] – tinypoodle | wiki:cpu_frequency_scaling_basics [2014/12/26 06:43] (current) – bmarkus | ||
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| ===== #VIEW CPU FREQUENCY INFORMATION ===== | ===== #VIEW CPU FREQUENCY INFORMATION ===== | ||
| - | If you want to view actual CPU frequency settings, install | + | If you want to view actual CPU frequency settings, install |
| cpufreq-info | cpufreq-info | ||
| Line 63: | Line 63: | ||
| + | ===== # | ||
| + | |||
| + | The following relates to a Pentium M under TC3.8.4 (2.6.33.3 kernel) running on a Dell Precision M70\\ | ||
| + | laptop, but may still be applicable if you run into a similiar problem.\\ | ||
| + | Installed cpufrequtils and selected ondemand govenor. The policy line from the cpufreq-info command read:\\ | ||
| + | < | ||
| + | indicated that CPU was locked at 800Mhz. Executing the command: | ||
| + | < | ||
| + | returned the value 800000 (frequency in Khz). Using the boot code: | ||
| + | < | ||
| + | fixed that. Now bios_limit contains 2267000 (2.267Ghz), the maximum speed for this CPU. Checking\\ | ||
| + | \proc\cpuinfo several times showed that the frequency was bouncing between 800Mhz and 2.27Ghz\\ | ||
| + | even though the machine was not doing anything. Changing the governor to conservative fixed that.\\ | ||
| + | For links to bug reports that helped solve this problem, see:\\ | ||
| + | http:// | ||
