Power consumption on Linux 3.10

The power consumption on the Linux kernel 3.10 is pretty bad.

On kernel 3.10, with the follwing config, the PowerTop results are:

#

# Timers subsystem

#

_CONFIG_TICKONESHOT=y

_CONFIG_NO_HZCOMMON=y

_# CONFIG_HZPERIODIC is not set

_CONFIG_NO_HZIDLE=y

_# CONFIG_NO_HZFULL is not set

_CONFIG_NOHZ=y

_CONFIG_HIGH_RESTIMERS=y

PowerTOP v2.0 Overview Idle stats Frequency stats Device stats Tunables

The battery reports a discharge rate of 28.0 W

The estimated remaining time is 23 minutes

Summary: 1785.5 wakeups/second, 0.0 GPU ops/second, 0.0 VFS ops/sec and 22.1% CPU use

Power est. Usage Events/s Category Description

16.3 W 2915 rpm Device Laptop fan

5.11 W 100.0% Device USB device: WALTON Primo-X1 Primo-X1

1.70 W 33.3% Device Display backlight

849 mW 33.3% Device Display backlight

425 mW 86.0 ms/s 330.7 Process /usr/bin/konsole

316 mW 63.9 ms/s 66.1 Process /usr/bin/plasma-desktop

142 mW 28.6 ms/s 396.8 Process /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7

64.1 mW 13.0 ms/s 198.4 Process kwin -session 101261418fe3000136103713100000053880000_13746081

53.6 mW 10.8 ms/s 0.00 Process powertop

35.9 mW 7.3 ms/s 66.1 Process /usr/lib/chromium/chromium –type=plugin –plugin-path=/usr/li

24.3 mW 4.9 ms/s 396.8 Interrupt PS/2 Touchpad / Keyboard / Mouse

6.92 mW 1.4 ms/s 0.00 Interrupt [48] i915

5.94 mW 1.2 ms/s 66.1 Interrupt [9] RCU(softirq)

3.98 mW 0.8 ms/s 0.00 kWork flush_to_ldisc

3.78 mW 0.8 ms/s 66.1 Process [ksoftirqd/2]

3.33 mW 673.3 us/s 66.1 Process [rcu_sched]

1.80 mW 363.1 us/s 66.1 Interrupt [1] timer(softirq)

1.79 mW 363.0 us/s 0.00 Process [ksoftirqd/4]

Where as on the 3.9 kernel:

The battery reports a discharge rate of 13.2 W

The estimated remaining time is 43 minutes

Summary: 611.5 wakeups/second, 0.0 GPU ops/second, 0.0 VFS ops/sec and 14.2% CPU use

Power est. Usage Events/s Category Description

14.0 W 2722 rpm Device Laptop fan

1.72 W 33.3% Device Display backlight

862 mW 33.3% Device Display backlight

255 mW 65.7 ms/s 58.0 Process /usr/bin/plasma-desktop

91.9 mW 23.7 ms/s 27.5 Process /usr/lib/chromium/chromium –type=renderer –lang=en-US –forc

60.1 mW 15.5 ms/s 96.1 Process /usr/lib/chromium/chromium –type=plugin –plugin-path=/usr/li

25.0 mW 6.4 ms/s 25.1 Process kwin -session 101261418fe3000136103713100000053880000_13746094

21.5 mW 5.6 ms/s 34.2 Process /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7

13.1 mW 3.4 ms/s 5.6 Process /usr/bin/konsole

9.82 mW 2.5 ms/s 53.7 Process [irq/48-iwlwifi]

9.11 mW 2.4 ms/s 2.2 Process /usr/bin/knemo

8.62 mW 2.2 ms/s 12.3 Process /usr/lib/chromium/chromium –password-store=detect

8.32 mW 2.1 ms/s 45.5 Interrupt [48] iwlwifi

6.96 mW 1.8 ms/s 35.3 Interrupt [7] sched(softirq)

5.13 mW 1.3 ms/s 57.1 Interrupt [47] i915

4.24 mW 1.1 ms/s 0.4 Process powertop

3.38 mW 0.9 ms/s 1.5 Timer tcp_keepalive_timer

2.85 mW 0.7 ms/s 11.9 Process /usr/sbin/mysqld –basedir=/usr –datadir=/var/lib/mysql –plu


See also