ztop

Power monitoring for HP ZBook Strix Halo.

One of the key features of MacBook's is good power management. It's the main thing that makes Linux on a laptop hard to use.

The Laptop

HP ZBook Ultra G1a: MAX PRO 390, 64GB RAM, OLED display, 74.5 Wh battery

The CPU/GPU in this laptop is great, the first one I have used that's close to MacBook tier.

Lid closed

With amd-s2idle, I got lid closed idle power down to 0.14W-0.20W.

I needed to disable the IOMMU in kernel args and disable the webcam in BIOS.

That's 15 days of lid closed power, that's good enough.

Lid open

CPU draws min 4W, whole laptop min 7W

Parts

Screen -- Only like 1 watt on a dark mode screen
Keyboard backlight -- 2 stupid watts, leave it off

Looking into other things.

Is there any way to get the CPU below 4?
What are the other 3 watts in the laptop I can't remove?

Usage

sudo ./ztop.py

Gets battery watts every second by reading regs right from the EC. (30 sec with ACPI)

For package watts, we read from the CPU's SMU.


                  ▁
           ▃      █
▁ ▁ ▁▁▅▁▂▁▁█▁▁▁ ▄▂█▃▁ ▂▃    ▁
█████████████████████▂████▇███
██████████████████████████████
██████████████████████████████
pkg (W):    4.09



                  ▁
                  █
            ▄     █▆
▆           █     ██
█▁   ▃ █▁▄█ █ ▂ ▃▇██▂ ▂▃   ▃
██▂▅▄█▆████▇█▇█▃████████▆███▄▃
██████████████████████████████
██████████████████████████████
██████████████████████████████
██████████████████████████████
██████████████████████████████
██████████████████████████████
bat (W):    7.38

Experiments

I connected over SSH on USB network.

# kills WiFi
sudo rfkill block wifi
# kills hyprland
sudo systemctl stop display-manager
# turns off display
echo 1 | sudo tee /sys/class/graphics/fb0/blank

And now we are down to 2.7W on the APU and 3.7W on the laptop

CPU (RyzenAdj)

This seems to be the tool to adjust the CPU power.

sudo ./ryzenadj --info shows all the knobs.

|        Name         |   Value   |     Parameter      |
|---------------------|-----------|--------------------|
| STAPM LIMIT         |    60.000 | stapm-limit        |
| STAPM VALUE         |     4.272 |                    |
| PPT LIMIT FAST      |    60.000 | fast-limit         |
| PPT VALUE FAST      |     6.396 |                    |
| PPT LIMIT SLOW      |    20.000 | slow-limit         |
| PPT VALUE SLOW      |     4.240 |                    |
| StapmTimeConst      |       nan | stapm-time         |
| SlowPPTTimeConst    |       nan | slow-time          |
| PPT LIMIT APU       |    70.000 | apu-slow-limit     |
| PPT VALUE APU       |     0.000 |                    |
| TDC LIMIT VDD       |       nan | vrm-current        |
| TDC VALUE VDD       |       nan |                    |
| TDC LIMIT SOC       |       nan | vrmsoc-current     |
| TDC VALUE SOC       |       nan |                    |
| EDC LIMIT VDD       |       nan | vrmmax-current     |
| EDC VALUE VDD       |       nan |                    |
| EDC LIMIT SOC       |       nan | vrmsocmax-current  |
| EDC VALUE SOC       |       nan |                    |
| THM LIMIT CORE      |   100.000 | tctl-temp          |
| THM VALUE CORE      |    38.754 |                    |
| STT LIMIT APU       |   100.000 | apu-skin-temp      |
| STT VALUE APU       |    38.754 |                    |
| STT LIMIT dGPU      |   100.000 | dgpu-skin-temp     |
| STT VALUE dGPU      |    38.785 |                    |
| CCLK Boost SETPOINT |       nan | power-saving /     |
| CCLK BUSY VALUE     |       nan | max-performance    |

Lowest I have seen is 3.25W by ryzenadj + disabling cores

GPU

# sudo cat /sys/kernel/debug/dri/1/amdgpu_pm_info
GFX Clocks and Power:
        400 MHz (MCLK)
        600 MHz (SCLK)
        0 MHz (PSTATE_SCLK)
        0 MHz (PSTATE_MCLK)
        0 mV (VDDGFX)
        0 mV (VDDNB)
        4.11 W (average SoC including CPU)
        4.11 W (current SoC including CPU)

GPU Temperature: 39 C
GPU Load: 1 %
VCN Load: 0 %

SMC Feature Mask: 0x5eb5f3f2cbfffffd
VCN: Powered down

Clock Gating Flags Mask: 0x3bc38130d
        Graphics Fine Grain Clock Gating: On
        Graphics Medium Grain Clock Gating: On
        Graphics Medium Grain memory Light Sleep: Off
        Graphics Coarse Grain Clock Gating: On
        Graphics Coarse Grain memory Light Sleep: On
        Graphics Coarse Grain Tree Shader Clock Gating: Off
        Graphics Coarse Grain Tree Shader Light Sleep: Off
        Graphics Command Processor Light Sleep: Off
        Graphics Run List Controller Light Sleep: Off
        Graphics 3D Coarse Grain Clock Gating: On
        Graphics 3D Coarse Grain memory Light Sleep: On
        Memory Controller Light Sleep: On
        Memory Controller Medium Grain Clock Gating: On
        System Direct Memory Access Light Sleep: Off
        System Direct Memory Access Medium Grain Clock Gating: Off
        Bus Interface Medium Grain Clock Gating: On
        Bus Interface Light Sleep: On
        Unified Video Decoder Medium Grain Clock Gating: Off
        Video Compression Engine Medium Grain Clock Gating: Off
        Host Data Path Light Sleep: Off
        Host Data Path Medium Grain Clock Gating: Off
        Digital Right Management Medium Grain Clock Gating: Off
        Digital Right Management Light Sleep: Off
        Rom Medium Grain Clock Gating: Off
        Data Fabric Medium Grain Clock Gating: Off
        VCN Medium Grain Clock Gating: Off
        Host Data Path Deep Sleep: Off
        Host Data Path Shutdown: On
        Interrupt Handler Clock Gating: On
        JPEG Medium Grain Clock Gating: Off
        Repeater Fine Grain Clock Gating: On
        Perfmon Clock Gating: On
        Address Translation Hub Medium Grain Clock Gating: On
        Address Translation Hub Light Sleep: On

The BIOS

BIOS is in X89_01030200.bin with SHA1 5059760896630b3e7184211081071442baf65348

pip install psptool can parse it, psptool X89_01030200.bin -Xunk

There's 69 files in here! No wonder it draws 4W it has to run 69 files.

Ztop

Install / Use

README