Date: Fri, 07 Mar 2014 07:25:04 -0700 From: Ian Lepore <ian@FreeBSD.org> To: Ruslan Bukin <br@FreeBSD.org> Cc: freebsd-arm <freebsd-arm@FreeBSD.org> Subject: Re: ULE on ARM Message-ID: <1394202304.1149.373.camel@revolution.hippie.lan> In-Reply-To: <20140307141406.GA79223@machdep.com> References: <20140307141406.GA79223@machdep.com>
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On Fri, 2014-03-07 at 18:14 +0400, Ruslan Bukin wrote: > I discovered just a couple of ARM kernel configs > uses SCHED_ULE, but all other uses SCHED_4BSD > > any disadvantages to use ULE scheduler on ARM? > or it is just because of historical reasons? > > I enabled ULE on Freescale Vybrid and running > it for a long time just fine. > > according to my subjective impressions ULE > works better on ARM in sound applications > > -Ruslan The widespread advice from a few years ago was that ULE was better for SMP and 4BSD was better for UP. I don't know whether that's still true (or whether it was ever true). I do know that there are fewer responses on mailing lists of "try switching the scheduler to 4BSD" as a way of fixing problems these days. I switched imx6 to ULE when adding SMP support for it. -- Ian
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