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什么是 Kworker 和 SignalSender？

tag-icon • tag-icon power-management cpu-load
什么是 Kworker 和 SignalSender？

Kworker 和 SignalSender 是什么？为什么它们占用这么多 CPU？Powertop 的统计数据给出了这些数字。我该如何优化它？

Top causes for wakeups:
28.4% (420.4)   PS/2 keyboard/mouse/touchpad interrupt
14.8% (219.5)   [kernel scheduler] Load balancing tick
14.0% (206.8)   kworker/0:0
8.4% (124.9)   SignalSender
7.7% (114.5)   [Rescheduling interrupts] <kernel IPI>

核心：

Kernel version - Linux xyz-xx-xx-110-1100 2.6.38-11-generic #48-Ubuntu SMP 
Fri Jul 29 19:05:14 UTC 2011 i686 i686 i386 GNU/Linux

PowerTop 统计数据

Top causes for wakeups:
18.5% (203.6)   [kernel scheduler] Load balancing tick
18.5% (203.5)   kworker/0:0
16.1% (176.6)   [Rescheduling interrupts] <kernel IPI>
14.2% (156.2)   SignalSender
9.4% (103.5)   [uhci_hcd:usb5, eth1, i915] <interrupt>
8.6% ( 94.5)D  chromium-browse
4.4% ( 48.8)   compiz
3.8% ( 41.5)   alsa-sink
3.4% ( 37.7)   icecast
0.6% (  6.1)   Xorg
0.5% (  6.0)   nginx
0.5% (  5.1)   [Function call interrupts] <kernel IPI>
0.5% (  5.0)   syndaemon
0.4% (  4.1)   [ahci] <interrupt>
0.1% (  1.0)   [hda_intel] <interrupt>

答案1

似乎与 Chromium 和 Google Chrome 有关这个问题。该问题似乎已在 Chromium 14.0.817 中得到修复。不确定何时会出现在 Google Chrome 中。

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