powertuninglinuxcon jap

8/18/2019 PowerTuningLinuxCon Jap

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Power Tuning LinA Case S

Alexan

alexandra.yateshttp://01.org/p

mailto:[email protected]://01.org/powertophttp://01.org/powertopmailto:[email protected]


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AboutExperiment


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About ExperimentSoftware• Ubuntu 13.10: Includes Ubuntu Linux Kernel 3.11.0-12.19. Based on

upstream Linux Kernel 3.11.13, upstream Linux Kernel 3.13.7, and3.14.0.Hardware• Microsoft Surface Pro 3

• 12-inch 2160 x 1440 • 1.9 GHz Intel Core i5 4300U – Haswell-ULT •

256 GB SSD Hard Drive• Battery life: 5 Hours 30 minutes

• Sony VAIO Pro 13• 1920 x 1080 touch screen LCD• Intel Inside Core i5 4200U @ 1.60 GHz – Haswell-ULT• 128 GB SSD drive• Battery life: 6 Hours 30 minutes http://laptops-and-notebooks.findthebest.com/l/2085/VAIO-Pro-SVP13213CXB


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About Experiment (cont.)HW Tools:

• Yokogawa WT310•

Photometer

SW Tools• PowerTOP

Other Hardware• USB drive• USB mouse• SD Card

• Tests:• 10 minutes intervals• Wall Power.• Suspend PM.• Idle Power Manage

(PM).• Battery fully charge


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The Results


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Out of the Box (OoB) Ubuntu 3.16.0

// change Nits. Number may change according to hardware$echo 515 > /sys/class/backlight/intel_back/brightness

0.00

2.00

4.00

6.00

8.00

10.00

12.00

W a t t s

Time (10 minutes)

oob screen on idle oob screen off idle nits screen on idle


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1%0%1%0%2%0%1%0%0%0%0%0%3%

8%

1%

81%

Overall Platform Power Consumption

A

N

K

W

T

C

S

S

T

W

S

U

L

C

M

P


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Linux Kernel 3.16

0

2

4

6

8

10

12

14

Linux Kernel 3.16 & PowerTOP

nits_scon_3.16 nits_scoff_3.16 nits_scon_3.16_PWT nits_scoff_3.16_PWT

Time (10 minutes)

W a t t s


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Out of the box vs Linux Kernel 3.16 PM Tuned

0

2

4

6

8

10

12

14

16

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Out of the Box vs 3.16 & PowerTOP

oob_scon_idle oob_scoff_idle nits_scon_3.16_PWT nits_scoff_3.16_PWT

W a t t s

Time (10 minutes)

P TOP K l 3 14 13 2


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PowerTOP c-states Kernel 3.14.13-2ScreenScreen on

P TOP K l 3 16 0


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PowerTOP c-states Kernel 3.16.0Screen on C7 tuned

Linux command line paramete

i915.enable_psr=1

pcie_aspm=forcehttp://wirel ess.kernel.orgDocumentation/ASPM#EnSPM_with_setpci

http://wireless.kernel.org/en/users/Documentation/ASPM#Enabling_ASPM_with_setpcihttp://wireless.kernel.org/en/users/Documentation/ASPM#Enabling_ASPM_with_setpcihttp://wireless.kernel.org/en/users/Documentation/ASPM#Enabling_ASPM_with_setpcihttp://wireless.kernel.org/en/users/Documentation/ASPM#Enabling_ASPM_with_setpcihttp://wireless.kernel.org/en/users/Documentation/ASPM#Enabling_ASPM_with_setpci


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How is the software behaving?


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PowerTOP TunablesTuned Component Command

VM write-back timeout echo '1500' > '/proc/sys/vm/dirty_writeback_centisecs';

Enable SATA link power management for host0 echo 'min_power' > '/sys/class/scsi_host/host0/link_power_management_p

NMI watchdog should be turned off echo '0' > '/proc/sys/kernel/nmi_watchdog';

Auto suspend for USB device AX88772 [2-1] echo 'auto' > '/sys/bus/usb/devices/2-1/power/control';

Auto suspend for USB device DT 101 G2 [Kingston] echo 'auto' > '/sys/bus/usb/devices/2-2/power/control';

Auto suspend for USB device eGalaxTouch EXC7910-1031-12.00.03 [eGalax Inc.] echo 'auto' > '/sys/bus/usb/devices/2-3/power/control';

Runtime PM for PCI Device Samsung Electronics Co Ltd Device a800 echo 'auto' > '/sys/bus/pci/devices/0000:03:00.0/power/control';

Runtime PM for PCI Device Intel Corporation Lynx Point-LP SMBus Controller echo 'auto' > '/sys/bus/pci/devices/0000:00:1f.3/power/control';

Runtime PM for PCI Device Intel Corporation Lynx Point-LP LPC Controller echo 'auto' > '/sys/bus/pci/devices/0000:00:1f.0/power/control';

Runtime PM for PCI Device Intel Corporation Lynx Point-LP USB EHCI #1 echo 'auto' > '/sys/bus/pci/devices/0000:00:1d.0/power/control';

Runtime PM for PCI Device Intel Corporation Lynx Point-LP PCI Express Root Port 6 echo 'auto' > '/sys/bus/pci/devices/0000:00:1c.4/power/control';


Runtime PM for PCI Device Intel Corporation Haswell-ULT Integrated GraphicsController

echo 'auto' > '/sys/bus/pci/devices/0000:00:02.0/power/control';


Runtime PM for PCI Device Intel Corporation Lynx Point-LP HECI #0 echo 'auto' > '/sys/bus/pci/devices/0000:00:16.0/power/control';

Runtime PM for PCI Device Intel Corporation Lynx Point-LP USB xHCI HC echo 'auto' > '/sys/bus/pci/devices/0000:00:14.0/power/control';


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CommonDevices

B k d I


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Background Impact

Time (10 minutes)0

2

4

6

8

10

12

14

16Background Color

oob_debian debian_T black_T white_oob white_T

W a t t s

OOB

OOB

Tuned

D i C i M


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Device Consumption Mouse

W a t t s

0

2

4

6

8

10

12

14

16

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Device Power Consumption

scon_3.16_pwt mouse_oob mouse_3.16 mouse_3.16_pwt

Time (10 minutes)


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Other Distros

Ubuntu vs Debian


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Ubuntu vs Debian

W a t t s

0

0.5

1

1.5

2

2.5

3

3.5

4

Ubuntu vs Debian

ubuntu_scon ubuntu_scoff debian_scon debia_scoff


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Conclusion


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Q&APowerTOP is an Open Source Project, Get Involved!!

https://01.or g/powertop/get-involved

How to contribute to PowerTOP?

1- Join the mailing list2- Get the code from the repo3- Send your patches to the mailing list
https://01.org/powertop/get-involvedhttps://01.org/powertop/get-involvedhttps://01.org/powertop/get-involved

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