Date: Sat, 7 Apr 2018 16:21:25 +0200 From: Peter <pmc@citylink.dinoex.sub.org> To: freebsd-stable@FreeBSD.ORG Subject: Re: kern.sched.quantum: Creepy, sadistic scheduler Message-ID: <f99a6c9a-2b2b-1b46-f89b-c4946eed050a@citylink.dinoex.sub.org> In-Reply-To: <2d3dfb30-fb34-55e4-0572-df17ceb5f66e@freebsd.org> References: <pa17m7$82t$1@oper.dinoex.de> <9FDC510B-49D0-4722-B695-6CD38CA20D4A@gmail.com> <8cfdb8a3-86a0-17ba-1e41-ff1912a30ee9@m5p.com> <2d3dfb30-fb34-55e4-0572-df17ceb5f66e@freebsd.org>
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Julian Elischer wrote: > for a single CPU you really should compile a kernel with SMP turned off > and 4BSD scheduler. > > ULE is just trying too hard to do stuff you don't need. Julian, if we agree on this, I am fine. (This implies that SCHED_4BSD will *not* be retired for an indefinite time!) I tested yesterday, and SCHED_4BSD doesn't show the annoying behaviour. SMP seems to be no problem (and I need that), but PREEMPTION is definitely related to the problem (see my other message sent now). P.
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