Re: [PATCH] HZ: 300Hz support

From: Jan Engelhardt
Date: Fri Nov 10 2006 - 07:11:20 EST



>> Fix two things. Firstly the unit is "Hz" not "HZ". Secondly it is useful
>> to have 300Hz support when doing multimedia work. 250 is fine for us in
>> Europe but the US frame rate is 30fps (29.99 blah for pedants). 300
>> gives us a tick divisible by both 25 and 30, and for interlace work 50
>> and 60. It's also giving similar performance to 250Hz.
>>
>> I'd argue we should remove 250 and add 300, but that might be excess
>> disruption for now.
>
>If we go down that path I would like to have 256.

Before we have tons of choosable HZ possibilities, I prefer
http://lkml.org/lkml/2006/6/18/111 where the user can input his desired
value.

>Why? There are still lots of systems with broken Interrupt 0 routing
>and usually on those the RTC works just fine. But unfortunately RTC
>can be only programmed to power of two frequencies. 256 would fit.


-`J'
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