Reasoning behind 0001-Drop-bc-usage-and-remove-symlink-creation-functions.patch

[andregirard37]

Hello,
I have problems with my Yocto build targeting the NX Orin. I noticed, looking at the NVIDIA forum, that people had /etc/nvpmodel/nvpmodel_p3767_0000.conf populated. my /etc/nvpmodel/ folder is empty. Which is normal since there is a patch to actually remove it: recipes-bsp/tegra-binaries/tegra-nvpower/0001-Drop-bc-usage-and-remove-symlink-creation-functions.patch
I was wondering the reasoning behind this as my nvpmodel -q --verbose does not seem to work:
$ sudo nvpmodel -q --verbose
NVPM VERB: Config file: /etc/nvpmodel.conf
NVPM VERB: parsing done for /etc/nvpmodel.conf
NVPM VERB: Using default settings.
NVPM WARN: power mode is not set!
NVPM VERB: Using default settings.
I am using the seeed Studios reComputer J4012 devkit. Not sure if that would play any role.

Also, do you know of any way to avoid a reboot of the board when changing the nvpmodel profile:
ubuntu@jetson:~$ sudo nvpmodel -m 2
NVPM ERROR: Error writing 240 to /sys/devices/gpu.0/tpc_pg_mask: 19
NVPM WARN: Reboot required for changing to this power mode: 2
NVPM WARN: DO YOU WANT TO REBOOT NOW? enter YES/yes to confirm:

On the Xavier NX, we used to be able to change the profile on the fly without a reboot. Not sure if that could still be possible.

Thanks as always!

[ichergui]

Hi @andregirard37
Could you please share the branch name ?
Are you using the tegra-demo-distro ?
I can see different prompt than the one we provide through tegra-demo-distro ? Are you sure that you are using Yocto build.
Note: you don't need to use sudo when using tegra-demo-distro

[andregirard37]

Hello. No I am using a custom distro for a project. I am working off Kirkstone and I saw the patch on meta-tegra

[madisongh]

The symlinks aren't done at runtime so that we can support building with read-only root filesystems. Instead, the NVPMODEL and NVPOWER variables in the machine configuration are used to choose the configuration files for the nvpmodel and nvpower services at build time.

Orins do require a reboot to change the nvpmodel.

[andregirard37]

Thank you. I don't have INIT_MANAGER defined in my local.conf file, so I would assume sysvinit is used as it is the default one for Poky. In fact I just tried a build using INIT_MANAGER = systemd and there is now 1900+ missing recipes to bake. For debugging purposes, I can try to get this build with systemd working and see if I can have journalctl -b -u nvpower and journalctl -b -u nvpmodel to work

[andregirard37]

I created the build using systemd but I don't see any info:
root@Orin-NX:# journalctl -b -u nvpmodel
-- No entries --
root@Orin-NX:# journalctl -b -u nvpower
-- No entries --

And again:
root@Orin-NX:# dmesg | grep nvpmodel
[ 4.011936] nvpmodel: initialized successfully
root@Orin-NX:# dmesg | grep nvpower
root@Orin-NX:~#

However, I tried playing around with it and have:

root@Orin-NX:~# sudo nvpmodel -q --verbose
Failed to read config file path, try default
NVPM VERB: Config file: /etc/nvpmodel.conf
NVPM VERB: parsing done for /etc/nvpmodel.conf
NVPM VERB: Using default settings.
NVPM WARN: power mode is not set!
NVPM VERB: Using default settings.

root@Orin-NX:~# sudo nvpmodel -m 2
[ 225.734823] CPU4: shutdown
[ 225.734917] psci: CPU4 killed (polled 0 ms)
[ 225.782632] CPU5: shutdown
[ 225.782723] psci: CPU5 killed (polled 0 ms)
[ 225.822560] CPU6: shutdown
[ 225.822667] psci: CPU6 killed (polled 0 ms)
[ 225.846838] IRQ 114: no longer affine to CPU7
[ 225.847491] CPU7: shutdown
[ 225.847582] psci: CPU7 killed (polled 0 ms)
[ 225.991757] nvgpu: 17000000.ga10b gk20a_scale_init:541 [INFO] enabled scaling for GPU
[ 225.991757]

root@Orin-NX:~# sudo nvpmodel -m 1
[ 257.643620] nvgpu: 17000000.ga10b fbp_pg_mask_store:981 [INFO] no value change, same mask already set
[ 257.643956] nvgpu: 17000000.ga10b tpc_pg_mask_store:1070 [INFO] no value change, same mask already set

root@Orin-NX:~# sudo nvpmodel -q --verbose
NVPM VERB: Config file: /etc/nvpmodel.conf
NVPM VERB: parsing done for /etc/nvpmodel.conf
NVPM VERB: Current mode: NV Power Mode: 10W
1
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_0: PATH /sys/devices/system/cpu/cpu0/online: REAL_VAL: 1 CONF_VAL: 1
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_1: PATH /sys/devices/system/cpu/cpu1/online: REAL_VAL: 1 CONF_VAL: 1
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_2: PATH /sys/devices/system/cpu/cpu2/online: REAL_VAL: 1 CONF_VAL: 1
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_3: PATH /sys/devices/system/cpu/cpu3/online: REAL_VAL: 1 CONF_VAL: 1
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_4: PATH /sys/devices/system/cpu/cpu4/online: REAL_VAL: 0 CONF_VAL: 0
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_5: PATH /sys/devices/system/cpu/cpu5/online: REAL_VAL: 0 CONF_VAL: 0
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_6: PATH /sys/devices/system/cpu/cpu6/online: REAL_VAL: 0 CONF_VAL: 0
NVPM VERB: PARAM CPU_ONLINE: ARG CORE_7: PATH /sys/devices/system/cpu/cpu7/online: REAL_VAL: 0 CONF_VAL: 0
NVPM VERB: PARAM FBP_POWER_GATING: ARG FBP_PG_MASK: PATH /sys/devices/gpu.0/fbp_pg_mask: REAL_VAL: 2 CONF_VAL: 2
NVPM VERB: PARAM TPC_POWER_GATING: ARG TPC_PG_MASK: PATH /sys/devices/gpu.0/tpc_pg_mask: REAL_VAL: 252 CONF_VAL: 252
NVPM VERB: PARAM GPU_POWER_CONTROL_ENABLE: ARG GPU_PWR_CNTL_EN: PATH /sys/devices/gpu.0/power/control: REAL_VAL: auto CONF_VAL: on
NVPM VERB: PARAM CPU_A78_0: ARG MIN_FREQ: PATH /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq: REAL_VAL: 729600 CONF_VAL: 729600
NVPM VERB: PARAM CPU_A78_0: ARG MAX_FREQ: PATH /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: REAL_VAL: 1190400 CONF_VAL: 1190400
NVPM VERB: PARAM GPU: ARG MIN_FREQ: PATH /sys/devices/17000000.ga10b/devfreq_dev/min_freq: REAL_VAL: 306000000 CONF_VAL: 0
NVPM VERB: PARAM GPU: ARG MAX_FREQ: PATH /sys/devices/17000000.ga10b/devfreq_dev/max_freq: REAL_VAL: 612000000 CONF_VAL: 612000000
NVPM VERB: PARAM GPU_POWER_CONTROL_DISABLE: ARG GPU_PWR_CNTL_DIS: PATH /sys/devices/gpu.0/power/control: REAL_VAL: auto CONF_VAL: auto
NVPM VERB: PARAM EMC: ARG MAX_FREQ: PATH /sys/kernel/nvpmodel_emc_cap/emc_iso_cap: REAL_VAL: 2133000000 CONF_VAL: 2133000000
NVPM VERB: PARAM DLA0_CORE: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/15880000.nvdla0/acm/clk_cap/dla0_core: REAL_VAL: 153600000 CONF_VAL: 153600000
NVPM VERB: PARAM DLA1_CORE: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/158c0000.nvdla1/acm/clk_cap/dla1_core: REAL_VAL: 115200000 CONF_VAL: 115000000
NVPM VERB: PARAM DLA0_FALCON: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/15880000.nvdla0/acm/clk_cap/dla0_falcon: REAL_VAL: 115200000 CONF_VAL: 115000000
NVPM VERB: PARAM DLA1_FALCON: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/158c0000.nvdla1/acm/clk_cap/dla1_falcon: REAL_VAL: 115200000 CONF_VAL: 115000000
NVPM VERB: PARAM PVA0_VPS: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/16000000.pva0/acm/clk_cap/pva0_vps: REAL_VAL: 115200000 CONF_VAL: 115000000
NVPM VERB: PARAM PVA0_AXI: ARG MAX_FREQ: PATH /sys/devices/platform/13e40000.host1x/16000000.pva0/acm/clk_cap/pva0_cpu_axi: REAL_VAL: 115200000 CONF_VAL: 115000000

So it seems that I need to force it the first time.

[madisongh]

So it seems that I need to force it the first time.

That could be because the service didn't actually run at boot time. What do systemctl status nvpower and systemctl status nvpmodel show? They should both be "active", IIRC

[andregirard37]

Looks like they are inactive:
sh-5.1# systemctl status nvpower

• nvpower.service - NVIDIA power management setup
  Loaded: loaded (8;;file://Orin-NX/lib/systemd/system/nvpower.service/lib/systemd/system/nvpower.service8;;; enabled; vendor prese8;;>
  Active: inactive (dead)

sh-5.1# systemctl status nvpmodel

• nvpmodel.service - NVIDIA power model daemon
  Loaded: loaded (8;;file://Orin-NX/lib/systemd/system/nvpmodel.service/lib/systemd/system/nvpmodel.service8;;; enabled; vendor pres8;;>
  Active: inactive (dead)

[madisongh]

Sounds like those services didn't run at boot time, so something's not quite right with the overall systemd setup