Re: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
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On Tue, 2012-08-21 at 20:57 +0200, Jeremy Jongepier wrote: > On 08/21/2012 08:36 PM, david wrote: > > > > Debian Sid has an RT kernel available, too. > > Checked the config. > > CONFIG_HZ_250=y > > Or doesn't that matter because > > CONFIG_NO_HZ=y > > ?? > > I've never used a tickless kernel, does it perform better or is there no > real difference? Good question. I always set up CONFIG_HZ_1000=y, but I also use HPET. There's a difference regarding to jitter between Hz 1000 and HPET when using hardware MIDI. I'm unsure if there's a difference between tickless yes and no. Some people claim that tickless = yes could cause issues. Most of my kernels where compiled with tickless = yes and I don't think that issues I got were related to this. I suspect that tickless did improve MIDI jitter too, but I don't compare same kernels with tickless yes/no. Dunno! However, IIRC tickless is only used when we use hrtimer (HPET)??? Regards, Ralf _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user