Date: Thu, 31 May 2012 08:48:38 -0400 From: Ryan Stone <rysto32@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: freebsd-hackers@freebsd.org, Adrian Chadd <adrian@freebsd.org>, Alexander Motin <mav@freebsd.org> Subject: Re: ULE/sched issues on stable/9 - why isn't preemption occuring? Message-ID: <CAFMmRNyLoA3ayfVjrEzU5wLpfwWaYU7yM7V9Ns0r0nrCTYmTXg@mail.gmail.com> In-Reply-To: <4FC76515.10302@FreeBSD.org> References: <CAJ-VmomWV2XibSNSr5Mfh7mpKsWrX5GKsNfU9iq7TO6%2BKxxQhw@mail.gmail.com> <201205301124.52597.jhb@freebsd.org> <CAJ-VmokXN9Ci8j2ExZkA-U=fsrMmeOn-ULB0pCYdtSwqHWpiKQ@mail.gmail.com> <CAJ-VmomU8mK5W%2BKrj4Mtn=3R=EcqPB-YDd9LwNxZo49%2By96bzA@mail.gmail.com> <4FC76515.10302@FreeBSD.org>
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On Thu, May 31, 2012 at 8:33 AM, Andriy Gapon <avg@freebsd.org> wrote: > In this vein it might make sense to enable KTR and KTR_SCHED in GENERIC. KTR_SCHED comes with a performance hit. Besides, with the DTrace sched provider that I committed this month (and MFC'ed yesterday) you can collect schedgraph data with a D script.
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