# Jetson Xavier NX : how to enable all CPU

**URL:** <https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777>\
**Category:** Jetson Xavier NX\
**Created:** [December 16, 2020, 4:54am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777 "2020-12-16T04:54:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![alok.pawar](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@alok.pawar](https://forums.developer.nvidia.com/u/alok.pawar)\
**Post date:** [December 16, 2020, 4:54am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777/1 "2020-12-16T04:54:58Z")

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Hi Team,

Right now Xavier NX board only boots with 2 CPUs, but default it contains 6 CPUs.

How to enable all ?

Linux Command line contains :  
Linux Cmdline: console=ttyTCU0,115200 video=tegrafb no\_console\_suspend=1 earlycon=tegra\_comb\_uart,mmio32,0x0c168000 gpt usbcore.o  
ld\_scheme\_first=1 tegraid=19.1.2.0.0 maxcpus=6 boot.slot\_suffix= boot.ratchetvalues=0.4.2 vpr\_resize sdhci\_tegra.en\_boot\_part\_access=1

But in booting

[5.708338] CPU2: shutdown  
[5.763993] CPU3: shutdown  
[5.846294] CPU4: shutdown  
[5.899498] CPU5: shutdown

Thanks  
Alks

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**Author:** ![udaysaikrishna](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@udaysaikrishna](https://forums.developer.nvidia.com/u/udaysaikrishna)\
**Post date:** [December 16, 2020, 5:39am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777/2 "2020-12-16T05:39:38Z")

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Hi Alkot,

Try the below commands to enable all CPU’s and boost the performance.

```
sudo nvpmodel -m 2
sudo jetson_clocks

```

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<div class="post-metadata">

**Author:** ![alok.pawar](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@alok.pawar](https://forums.developer.nvidia.com/u/alok.pawar)\
**Post date:** [December 16, 2020, 5:46am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777/3 "2020-12-16T05:46:17Z")

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Power mode 2 is for 15W\_4Core . Right ?

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**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\
**Post date:** [December 16, 2020, 6:05am UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777/5 "2020-12-16T06:05:14Z")

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Hi,  
Please refer to power modes of Xavier NX:  
[https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2Fpower\_management\_jetson\_xavier.html%23wwpID0E0NO0HA](https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2Fpower_management_jetson_xavier.html%23wwpID0E0NO0HA)

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**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, 6:42pm UTC](https://forums.developer.nvidia.com/t/jetson-xavier-nx-how-to-enable-all-cpu/163777/7 "2021-10-18T18:42:38Z")

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