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Message-ID: <4F840599.7060805@ladisch.de> Date: Tue, 10 Apr 2012 12:04:09 +0200 From: Clemens Ladisch <clemens@...isch.de> To: Alex Stone <alex.parchment@...dex.ru> CC: linux-kernel@...r.kernel.org Subject: Re: Timing 250 versus 1000 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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