
Ubuntu 13.10
我在筆記型電腦上運行MSI gs70 Stealth
。當我跑步時powertop 2.4
,我看到:
The battery reports a discharge rate of 38.1 W The estimated remaining time is 0 hours, 5 minutes
Summary: 1524,0 wakeups/second, 56,0 GPU ops/seconds, 0,0 VFS ops/sec and 28,3% CPU use
Power est. Usage Events/s Category Description
6.97 W 96,7% Device Display backlight
1.19 W 18,9 ms/s 296,8 Interrupt [6] tasklet(softirq) 586 mW 1,2 ms/s 146,8 kWork od_dbs_timer 525 mW 7,0 ms/s 130,8 Process smbd -F 454 mW 3,1 ms/s 113,4 Timer hrtimer_wakeup 450 mW 3,4 ms/s 113,5 Process /usr/bin/pulseaudio --start --log-target=syslog 445 mW 10,5 ms/s 100,6 Process /opt/google/chrome/chrome
--no-startup-window 398 mW 20,4 ms/s 91,5 Process compiz 369 mW 1,1 ms/s 92,4 Process [rcu_sched] 323 mW 79,0 ms/s 72,7 Process /opt/google/chrome/chrome --type=renderer --lang=en-US
--force-fieldtrials=AutocompleteDynamicTrial_2/DefaultControl_R2_Stable/ 301 mW 35,1 ms/s 67,6 Process /usr/bin/tilda 230 mW 1,8 ms/s 57,5 Timer tick_sched_timer 163 mW 3,9 ms/s 40,4 Interrupt [46] i915 158 mW 10,7 ms/s 38,5 Process /usr/bin/ibus-daemon
--daemonize --xim
89.6 mW 21,9 ms/s 20,1 Process /usr/bin/X -core :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
86.9 mW 2,0 ms/s 21,6 Interrupt PS/2 Touchpad / Keyboard / Mouse
73.7 mW 3,0 ms/s 18,1 Process /usr/lib/ibus/ibus-engine-simple
69.0 mW 169,3 µs/s 17,3 kWork flush_to_ldisc
67.2 mW 149,9 µs/s 16,8 kWork intel_unpin_work_fn
47.2 mW 11,5 ms/s 10,6 Process /usr/lib/unity/unity-panel-service
43.3 mW 321,8 µs/s 10,8 Process java -jar Downloads/tomighty-0.7.1.jar
42.3 mW 3,7 ms/s 10,2 Process /opt/google/chrome/chrome --type=renderer --lang=en-US
--force-fieldtrials=AutocompleteDynamicTrial_2/DefaultControl_R2_Stable/
30.7 mW 6,9 ms/s 7,0 Process powertop
30.7 mW 1,0 ms/s 7,6 Process zeitgeist-datahub
29.8 mW 1,4 ms/s 7,3 Process /usr/lib/x86_64-linux-gnu/indicator-application-service
28.0 mW 36,6 µs/s 7,0 kWork console_callback
26.8 mW 3,4 ms/s 6,4 Process indicator-multiload
25.0 mW 126,9 µs/s 5,6 Process syndaemon -i 1.0 -t -K -R
23.4 mW 87,2 µs/s 5,8 kWork ieee80211_iface_work
20.4 mW 6,7 ms/s 4,4 Process /opt/google/chrome/chrome --type=renderer --lang=en-US
--force-fieldtrials=AutocompleteDynamicTrial_2/DefaultControl_R2_Stable/
19.9 mW 236,9 µs/s 5,0 Process [rcuos/7]
16.6 mW 648,9 µs/s 4,1 Process /usr/lib/x86_64-linux-gnu/bamf/bamfdaemon
16.2 mW 687,7 µs/s 4,0 Process /usr/bin/gtk-window-decorator
15.1 mW 3,3 ms/s 3,4 Process /usr/lib/x86_64-linux-gnu/hud/hud-service
14.5 mW 391,1 µs/s 3,6 Interrupt [1] i8042
10.9 mW 248,1 µs/s 2,7 Interrupt [4] block(softirq)
為什麼如果我將列中的所有值相加,Power est.
我不會得到38.1W
放電率,而只能得到類似的值8~9W
?
答案1
這電池報告放電率38.1W
該值是透過 ACPI 直接從電池/主機板讀取的,並且應該相對較好地反映正確的電源使用情況(但並非在所有設備上)。但是,如果電池報告始終關閉,則估計功率仍應與其匹配。
“Power est”中的值。列是由PowerTOP透過觀察不同負載和顯示亮度下的功耗來估計的。當顯示器關閉且處理器(和 GPU)處於睡眠狀態時,PowerTOP 會獲得基準功率。最重要的是,還有功率估計。
沒有機制可以取得單一組件或進程的電量使用情況。例如,某些週邊設備可能會消耗大量電量,但 PowerTOP 無法測量這一點。最好顯示對每個過程的影響的最佳可能估計,並擁有(相對較大的)未統計使用量,而不是縮放估計以匹配排放率。
若要改進估計,您可以嘗試(重新)校準 PowerTOP
powertop --calibrate
從man 8 powertop
:
--calibrate
runs powertop in calibration mode. When running on battery,
powertop can track power consumption as well as system activity.
When there are enough measurements, powertop can start to report
power estimates. One can get more accurate estimates by using
this option to enable a calibration cycle. This will cycle through
various display levesl (sic) and USB device activities and workloads.
嘗試在拔掉充電器的情況下執行校準。您的筆記型電腦錯誤回報電池充電狀態或您在 PowerTOP 中遇到錯誤的可能性很小。