# TX2, error when max out the clock frequencies: n command: -max, please try again or see --help **URL:** \ **Category:** Jetson TX2\ **Created:** [February 27, 2018, 6:59pm UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611 "2018-02-27T18:59:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![heyworld](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/heyworld/32/11375_2.png) [@heyworld](https://forums.developer.nvidia.com/u/heyworld)\ **Post date:** [February 27, 2018, 6:59pm UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/1 "2018-02-27T18:59:00Z")
Below command is provided by nvidia l4t documents. To max out the clock frequencies •On the target, execute the following command: sudo /home/ubuntu/tegrastats -max which forces all runtime-modifiable clock frequencies to their maximum values. When run this way, tegrastats quits immediately after setting the clocks. However I failed to run it on my machine, the error message is: n command: -max, please try again or see --help Any idea about this? BTW, sudo /home/ubuntu/tegrastats is totally good, I can see correct status, just argument “-max” doesn’t work. Thanks in advance! ---
**Author:** ![dusty\_nv](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/dusty_nv/32/14043_2.png) [@dusty\_nv](https://forums.developer.nvidia.com/u/dusty_nv)\ **Post date:** [February 27, 2018, 8:29pm UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/2 "2018-02-27T20:29:11Z")
Hi heyworld, to max out the clocks, please run jetson\_clocks script like so: ```auto $ sudo ~/jetson_clocks.sh ``` Alternatively, you can use the [nvpmodel](http://www.jetsonhacks.com/2017/03/25/nvpmodel-nvidia-jetson-tx2-development-kit/) tool. ---
**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\ **Post date:** [February 27, 2018, 10:41pm UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/3 "2018-02-27T22:41:06Z")
Additional note: it is not obvious how nvpmodel and jetson\_clocks interact. jeston\_clocks.sh boosts the clocks for you current config, that depends on last nvpmodel selected. nvpmodel tries to use a preset of online cores / clocks for optimizing performance/power on different profiles (you may check the details in /etc/nvpmodel.conf). The bad thing (at least on R28.2-DP) is that if you are running high speed clocks and then select a low power mode with nvpmodel, it can fail. For example, if I select MAXN mode and boost clocks (max performance), then it fails to properly switch to MAXP\_CORE\_DENVER mode: ```auto sudo nvpmodel -m0 sudo ./jetson_clocks.sh sudo nvpmodel -m4 NVPM WARN: write PARAM GPU: ARG MAX_FREQ: PATH: /sys/devices/17000000.gp10b/devfreq/17000000.gp10b/max_freq VAL: 1134750000 - probably failed due to it is less than current min value 1300500000 NVPM ERROR: Error writing to /sys/devices/17000000.gp10b/devfreq/17000000.gp10b/max_freq: 22 NVPM ERROR: failed to write PARAM GPU: ARG MAX_FREQ: PATH: /sys/devices/17000000.gp10b/devfreq/17000000.gp10b/max_freq VAL: 1134750000 NVPM ERROR: failed to set power mode! NVPM ERROR: Failed to exec option requests! ``` So it is better to store the default (slow) clocks after boot with: ```auto sudo ./jetson_clocks.sh --store ``` that will save the current config into ~/l4t\_dfs.conf and you can restore later with: ```auto sudo ./jetson_clocks.sh --restore ``` In a similar way, if you change the nvpmodel for a performance mode from low power mode, you may have to relaunch jetson\_clocks to get max boost. ---
**Author:** ![shaorui](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@shaorui](https://forums.developer.nvidia.com/u/shaorui)\ **Post date:** [August 26, 2021, 1:03am UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/4 "2021-08-26T01:03:25Z")
> [@dusty\_nv](#): > > `jetson_clocks.sh` Where is jetson\_clocks.sh directory？ ```auto $ sudo ./jetson_clocks.sh sudo: ./jetson_clocks.sh: command not found ``` Thanks ---
**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\ **Post date:** [August 26, 2021, 11:18am UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/5 "2021-08-26T11:18:45Z")
In recent releases, this script has moved from nvidia user home directory to /usr/bin and it has been renamed without sh extension: ```auto /usr/bin/jetson_clocks ``` ---
**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\ **Post date:** [October 18, 2021, 6:14pm UTC](https://forums.developer.nvidia.com/t/tx2-error-when-max-out-the-clock-frequencies-n-command-max-please-try-again-or-see-help/58611/6 "2021-10-18T18:14:27Z")