linux-kernel - Re: Timing 250 versus 1000

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Message-ID: <4F84544D.9060406@yandex.ru>
Date:	Tue, 10 Apr 2012 19:39:57 +0400
From:	Alex Stone <alex.parchment@...dex.ru>
To:	Clemens Ladisch <clemens@...isch.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Timing 250 versus 1000

On 04/10/2012 02:04 PM, Clemens Ladisch wrote:
> Alex Stone wrote:
>> On 04/08/2012 05:08 PM, Clemens Ladisch wrote:
>>> Alex Stone wrote:
>>>> those of us who write a lot of midi driven work, we're still more or
>>>> less required to use some sort of RT kernel to get any degree of
>>>> playback timing accuracy.
>>> The ALSA sequencer timer stopped using the system timer years ago.
>>> And the difference between RT and 'normal' kernels is not the timer
>>> frequency.
>> I'm using jack with seq, so are you saying the ALSA sequencer timer is
>> using a higher timer rate than than is set in the kernel,
> It's using different timers (RTC or hrtimer), which support higher
> precision.
>
>> and there's no need for me to bother with this,
> Yes.  If you want to be sure, check that G3 appears in /proc/asound/timers
> when you're using the sequencer.
>
>
> Regards,
> Clemens
It does.

Thanks for the info.

Regards,
Alex.
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