Date: Thu, 18 Nov 2010 10:46:48 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Alexander Best <arundel@freebsd.org> Cc: "O. Hartmann" <ohartman@zedat.fu-berlin.de>, freebsd-performance@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org>, FreeBSD Stable <freebsd-stable@freebsd.org>, Andriy Gapon <avg@freebsd.org> Subject: Re: TTY task group scheduling Message-ID: <20101118184648.GA46187@icarus.home.lan> In-Reply-To: <20101118182324.GA36312@freebsd.org> References: <AANLkTinHSX1%2Bs3hrHyDeU2Vfp6zekTe04XkHhTc2jtLv@mail.gmail.com> <4CE50849.106@zedat.fu-berlin.de> <4CE52177.3020306@freebsd.org> <20101118182324.GA36312@freebsd.org>
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On Thu, Nov 18, 2010 at 06:23:24PM +0000, Alexander Best wrote: > On Thu Nov 18 10, Andriy Gapon wrote: > > on 18/11/2010 13:04 O. Hartmann said the following: > > > On 11/18/10 02:30, grarpamp wrote: > > >> Just documenting regarding interactive performance things. > > >> This one's from Linux. > > >> > > >> http://www.phoronix.com/scan.php?page=article&item=linux_2637_video&num=1 > > > > > > Well, > > > it would be nice to have those improvements in FreeBSD, but I doubt this will make > > > it in due time to FreeBSD's kernel. > > > > Well, I think that those improvements apply only to a very specific usage pattern > > and are greatly over-hyped. > > you think so? judging from the videos the changes are having a huge impact imo. > > cheers. > alex > > btw: i posted a similar thread on freebsd-backers@, but nobody seemed > interested in it. subject line is "sched_autogroup_enabled". FWIW, this /. post pretty much sums up my opinion of this scheduler change (though I admit something could be learned from it): http://linux.slashdot.org/comments.pl?sid=1870628&cid=34241622 Specifically, the quote: "process grouping is too difficult to be done based on such simplistic criteria". -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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