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Date: Tue, 4 Aug 2009 18:55:15 +1000 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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To: Hans Petter Selasky <hselasky@c2i.net>
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Cc: src-committers@freebsd.org, Bruce Evans <brde@optusnet.com.au>,
	svn-src-all@freebsd.org, alfred@freebsd.org, rwatson@freebsd.org,
	nparhar@gmail.com, svn-src-head@freebsd.org,
	"M. Warner Losh" <imp@bsdimp.com>
Subject: Re: svn commit: r195960 - in head/sys/dev/usb: . controller input
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On Mon, 3 Aug 2009, Hans Petter Selasky wrote:

> On Monday 03 August 2009 19:46:16 Bruce Evans wrote:
>> On Mon, 3 Aug 2009, M. Warner Losh wrote:
>>> In message: <200908030827.21108.hselasky@c2i.net>
>>>
>>> : I see two solutions:
>>> :
>>> : 1) Disable the timekeeping if no keys are pressed.
>>> :
>>> : 2) Second option is to use getmicrotime. Actually what I need is just a
>>> : millisecond time reference so I know when to repeat the last key.
>>> :
>>> : Any opinions? DELAY() or getmicrotime() ?
>>
>> DELAY(1) is somewhet usable.
>
> I think DELAY(1) is not accurate enough.

Indeed.  But DELAY(10) is probably accurate enough, and certainly
efficient enough (though ugly) since the atkbd device has used DELAY(7)
and DELAY(20) for a long time without anyone noticing this slowing
down disk i/o.  It would take about 100 active console input drivers
doing DELAY(10)'s to accumulate a delay of 1 mS.

> I suggest that the DELAY(1000) is only active while a key is actually pressed.
>
> See attached patch. Please test and report back.

Better.

Bruce