Re: A few questions and issues with dynticks, NOHZ and powertop

From: Dmitry Torokhov
Date: Sat Apr 03 2010 - 19:53:52 EST

Hi Dominik,

On Sun, Apr 04, 2010 at 12:33:28AM +0200, Dominik Brodowski wrote:
> 4) SynPS/2 touchpad:
> Why does moving the touchpad lead to sooo many IRQs? I can't look as fast
> as the mouse pointer seems to get new data:
> 62,5% (473,1) <interrupt> : PS/2 keyboard/mouse/touchpad

80 pps @ 6 bytes/packet = 480 interrupts/sec.

You can try using psmouse.rate=40 to limit it to 40 pps which should
bring it to the rate of standard PS/2 mouse at the expense of

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at