#contents
|SoC|Parker|
|CPU|Cortex A57 4 core + Denver 2.0 2 core|
|GPU|Pascal 256 Core|
|Memory|8GB 128bit LPDDR4|
|Storage|32GB eMMC|


-[[Embedded Systems Developer Kits & Modules | NVIDIA Jetson | NVIDIA>http://www.nvidia.com/object/embedded-systems-dev-skits-modules.html]]&note{embedded-systems-dev-kits-modules:[[Embedded Systems Developer Kits & Modules | NVIDIA Jetson | NVIDIA>http://www.nvidia.com/object/embedded-systems-dev-kits-modules.html]], 2017-03-24閲覧};
-[[Jetson TX2 Module | NVIDIA Developer>https://developer.nvidia.com/embedded/buy/jetson-tx2]]&note{embedded-jetson-tx2-nvidia-official:[[Jetson TX2 Module | NVIDIA Developer>https://developer.nvidia.com/embedded/buy/jetson-tx2]], 2017-03-24閲覧};
-[[NVIDIA、Pascal GPUを採用した新型「Jetson TX2」を、AIエッジ向けに投入 - Car Watch>http://car.watch.impress.co.jp/docs/news/1048408.html]]&note{jetson-tx2-impress:笠原一輝, [[NVIDIA、Pascal GPUを採用した新型「Jetson TX2」を、AIエッジ向けに投入 - Car Watch>http://car.watch.impress.co.jp/docs/news/1048408.html]], 2017-03-08公開(日本時間), 2017-03-24閲覧};
-SoCはTegra X2ではなく、Parkerというコードネームで呼ぶらしい&note{name-of-tegra-x2-is-technically-parker:後藤弘茂, [[【後藤弘茂のWeekly海外ニュース】NVIDIAのTegraを採用する任天堂の新ゲーム機「Nintendo Switch」  - PC Watch>http://pc.watch.impress.co.jp/docs/column/kaigai/1026659.html]], 2016-10-26, 2017-03-24閲覧};
-[[NVIDIA,Pascal世代の新SoC「Tegra X2」を採用する組み込み向け開発キット「Jetson TX2」発表 - 4Gamer.net>http://www.4gamer.net/games/049/G004964/20170307048/]]&note{release-of-jetson-tx2-4gamers:塩田紳二, [[NVIDIA,Pascal世代の新SoC「Tegra X2」を採用する組み込み向け開発キット「Jetson TX2」発表 - 4Gamer.net>http://www.4gamer.net/games/049/G004964/20170307048/]], 2017-03-08公開, 2017-03-24閲覧};
-[[Jetson TX2 – わっぜか株式会社>http://www.wazeka-inc.com/archives/category/iot/jetson-tx2]]&note{jetson-tx2-arrived-wazeka-inc:[[Jetson TX2 – わっぜか株式会社>http://www.wazeka-inc.com/archives/category/iot/jetson-tx2]], 2017-03-31公開, 2017-04-03閲覧};
-[[菱洋エレクトロ株式会社|_SEO_DESCRIPTION>http://www.ryoyo-web.jp/semi/detail_solution/1491954005-627998/]]&note{ryo-yo-jetson-tx2:[[菱洋エレクトロ株式会社|_SEO_DESCRIPTION>http://www.ryoyo-web.jp/semi/detail_solution/1491954005-627998/]], 2017-04-17閲覧};

*スペック [#d0761b5c]
-CPU:Denver2 Dual cores + Cortex-A57 Quad cores 2.0GHz
-cpuinfo
 nvidia@tegra-ubuntu:~$ cat /proc/cpuinfo
 processor       : 0
 model name      : ARMv8 Processor rev 3 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x41
 CPU architecture: 8
 CPU variant     : 0x1
 CPU part        : 0xd07
 CPU revision    : 3
 
 processor       : 1
 model name      : ARMv8 Processor rev 0 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x4e
 CPU architecture: 8
 CPU variant     : 0x0
 CPU part        : 0x003
 CPU revision    : 0
 MTS version     : 37620520
 
 processor       : 2
 model name      : ARMv8 Processor rev 0 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x4e
 CPU architecture: 8
 CPU variant     : 0x0
 CPU part        : 0x003
 CPU revision    : 0
 MTS version     : 37620520
 
 processor       : 3
 model name      : ARMv8 Processor rev 3 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x41
 CPU architecture: 8
 CPU variant     : 0x1
 CPU part        : 0xd07
 CPU revision    : 3
 
 processor       : 4
 model name      : ARMv8 Processor rev 3 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x41
 CPU architecture: 8
 CPU variant     : 0x1
 CPU part        : 0xd07
 CPU revision    : 3
 
 processor       : 5
 model name      : ARMv8 Processor rev 3 (v8l)
 BogoMIPS        : 62.50
 Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
 CPU implementer : 0x41
 CPU architecture: 8
 CPU variant     : 0x1
 CPU part        : 0xd07
 CPU revision    : 3
-lscpu
 $ lscpu
 Architecture:          aarch64
 Byte Order:            Little Endian
 CPU(s):                6
 On-line CPU(s) list:   0-5
 Thread(s) per core:    1
 Core(s) per socket:    3
 Socket(s):             2
 Model name:            ARMv8 Processor rev 3 (v8l)
 CPU max MHz:           2035.2000
 CPU min MHz:           345.6000
 Hypervisor vendor:     (null)
 Virtualization type:   full
 L1d cache:             32K
 L1i cache:             48K
 L2 cache:              2048K
-cpufreq
 $ cat /sys/bus/cpu/devices/cpu?/cpufreq/cpuinfo_max_freq
 2035200
 2035200
 2035200
 2035200
 2035200
 2035200
-kernel (Jetpack 3.0 インストール後)
 nvidia@tegra-ubuntu:~$ uname -a
 Linux tegra-ubuntu 4.4.15-tegra #1 SMP PREEMPT Wed Mar 1 21:09:29 PST 2017 aarch64 aarch64 aarch64 GNU/Linux
-OS
 nvidia@tegra-ubuntu:~$ lsb_release -a
 No LSB modules are available.
 Distributor ID: Ubuntu
 Description:    Ubuntu 16.04 LTS
 Release:        16.04
 Codename:       xenial
-auxv
 nvidia@tegra-ubuntu:~$ xxd -e -g8 /proc/self/auxv
 00000000: 0000000000000021 0000007fa8d8c000  !...............
 00000010: 0000000000000010 00000000000000ff  ................
 00000020: 0000000000000006 0000000000001000  ................
 00000030: 0000000000000011 0000000000000064  ........d.......
 00000040: 0000000000000003 000000558af14040  ........@@..U...
 00000050: 0000000000000004 0000000000000038  ........8.......
 00000060: 0000000000000005 0000000000000008  ................
 00000070: 0000000000000007 0000007fa8d61000  ................
 00000080: 0000000000000008 0000000000000000  ................
 00000090: 0000000000000009 000000558af163d8  .........c..U...
 000000a0: 000000000000000b 00000000000003e9  ................
 000000b0: 000000000000000c 00000000000003e9  ................
 000000c0: 000000000000000d 00000000000003e9  ................
 000000d0: 000000000000000e 00000000000003e9  ................
 000000e0: 0000000000000017 0000000000000000  ................
 000000f0: 0000000000000019 0000007fc01507c8  ................
 00000100: 000000000000001f 0000007fc0150feb  ................
 00000110: 000000000000000f 0000007fc01507d8  ................
 00000120: 0000000000000000 0000000000000000  ................
-gcc は5.4.0 (Jetpack 3.0 インストール前は5.3.1)
 nvidia@tegra-ubuntu:~$ gcc --version
 gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
 Copyright (C) 2015 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-nvcc
 $ nvcc --version
 nvcc: NVIDIA (R) Cuda compiler driver
 Copyright (c) 2005-2016 NVIDIA Corporation
 Built on Mon_Jan_23_12:28:25_CST_2017
 Cuda compilation tools, release 8.0, V8.0.62
*Jetpack 3.0 [#n6997d6a]

-[[JetPack for L4T | NVIDIA Developer>https://developer.nvidia.com/embedded/jetpack]]&note{jetpack-download-official:[[JetPack for L4T | NVIDIA Developer>https://developer.nvidia.com/embedded/jetpack]], Jetpack 3.0, 2017-04-24閲覧}; からダウンロード
-2017年4月24日時点での最新版はJetpack 3.0, JetsonTX2はL4T 27.1が最新版

*CPUを全部オンラインにする [#mcdf2232]
-[[参考サイト>https://devtalk.nvidia.com/default/topic/1000345/two-cores-disabled-/?offset=3]]&note{two-cores-disabled-nvidia-developer:[[Two cores disabled. - NVIDIA Developer Forums>https://devtalk.nvidia.com/default/topic/1000345/two-cores-disabled-/?offset=3]], 2017-04-24閲覧};にかかれてあるが、インストールしただけだと、Cortex A57 の4core しか見えていない
-以下のコマンドを叩いて、1番と2番をオンラインにしないと、6個のコア全部を使うことはできない
 sudo su
 echo 1 > /sys/devices/system/cpu/cpu1/online
 echo 1 > /sys/devices/system/cpu/cpu2/online
-NVIDIA提供のnvpmodelコマンドでも設定できる
 sudo nvpmodel -m 2
-3がMAXP_ARM、2がMAXP_CORE_ALL、1がMAXQ、0がMAXN
-suのcrontabに書いてしまったほうが便利
 $ sudo crontab -l | tail -1
 @reboot nvpmodel -m 2
 $ sudo crontab -e

*ファンを回す [#x71bf118]
-とりあえず全力で回しておく
 $ sudo echo 255 > /sys/kernel/debug/tegra_fan/target_pwm
-こちらもcrontabに書いておくと便利
 $ sudo crontab -l | tail -1
 @reboot echo 255 > /sys/kernel/debug/tegra_fan/target_pwm

TBW
-[[Jetson TK1]]
-[[Jetson TX1]]
-[[Arm]]

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