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en:c2_set_cpu_freq [2016/09/05 16:42] joy.cho [How to set max cpu frequency and cores] |
en:c2_set_cpu_freq [2017/07/20 09:41] (current) joy.cho [How to set max cpu frequency] |
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| <WRAP center round important> | <WRAP center round important> | ||
| - | This functionality has not been released yet. The version will be specified here after the new version release. | + | * Ubuntu : Available with 3.14.77-80 (Sep 8, 2016) or higher version |
| - | * Ubuntu : N/A | + | * Android : Available with Android v2.2 or higher version |
| - | * Android : N/A | + | |
| </WRAP> | </WRAP> | ||
| Line 16: | Line 15: | ||
| == The available list of cpu frequency set == | == The available list of cpu frequency set == | ||
| - | We recommend the following cpu frequency sets under normal conditions. | + | Here are the common sets we recommend under normal conditions. |
| | frequency | notation on boot.ini | | | frequency | notation on boot.ini | | ||
| Line 34: | Line 33: | ||
| | 1.680 GHz | "1680" | booting OK with 4 cores / recommend 3 cores for heavy load test | | | 1.680 GHz | "1680" | booting OK with 4 cores / recommend 3 cores for heavy load test | | ||
| | 1.752 GHz | "1752" | booting OK with 4 cores / recommend 2 cores for heavy load test | | | 1.752 GHz | "1752" | booting OK with 4 cores / recommend 2 cores for heavy load test | | ||
| - | | 1.896 GHz | "1896" | booing OK with 1~3 cores / recommend running with a single core | | + | | 1.896 GHz | "1896" | booting OK with 1~3 cores / recommend running with a single core | |
| - | | 1.920 GHz | "1920" | booint OK with 1 or 2 cores / recommend running with a single core | | + | | 1.920 GHz | "1920" | booting OK with 1 or 2 cores / recommend running with a single core | |
| | 1.944 GHz | "1944" | booting OK with a single core but unstable | | | 1.944 GHz | "1944" | booting OK with a single core but unstable | | ||
| | 2.016 GHz | "2016" | extremely unstable | | | 2.016 GHz | "2016" | extremely unstable | | ||
| Line 41: | Line 40: | ||
| == setting boot.ini == | == setting boot.ini == | ||
| - | Please modify **max_freq ** based on the aforementioned frequency table and be sure the unit is MHz. | + | Please modify **max_freq ** based on the aforementioned frequency table. The unit of max_freq in boot.ini is MHz. |
| + | |||
| + | If you don't set max_freq in bootargs or the setting value is wrong one which doesn't exist in frequency table, max_freq will be set as "1.536GHz" by default. | ||
| <code> | <code> | ||
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| # max cpu frequency in dvfs table / in MHz unit | # max cpu frequency in dvfs table / in MHz unit | ||
| # setenv max_freq "2016" # 2.016GHz | # setenv max_freq "2016" # 2.016GHz | ||
| - | # setenv max_freq "1944" # 1.944GHz | ||
| # setenv max_freq "1944" # 1.944GHz | # setenv max_freq "1944" # 1.944GHz | ||
| # setenv max_freq "1920" # 1.920GHz | # setenv max_freq "1920" # 1.920GHz | ||
| Line 125: | Line 125: | ||
| CPU part : 0xd03 | CPU part : 0xd03 | ||
| CPU revision : 4 | CPU revision : 4 | ||
| + | |||
| + | Hardware : ODROID-C2 | ||
| </code> | </code> | ||
