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Date: Sat, 3 Apr 2010 16:53:26 -0700
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Dominik Brodowski <linux@dominikbrodowski.net>,
       linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
       Ingo Molnar <mingo@elte.hu>, Peter Zijlstra <peterz@infradead.org>,
       Alan Stern <stern@rowland.harvard.edu>,
       Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: A few questions and issues with dynticks, NOHZ and powertop
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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
sensitivity...

-- 
Dmitry
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