Date: Fri, 19 Nov 2010 16:08:24 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: TTY task group scheduling Message-ID: <20101119140824.GO2392@deviant.kiev.zoral.com.ua> In-Reply-To: <4CE64879.2060802@freebsd.org> References: <AANLkTinHSX1%2Bs3hrHyDeU2Vfp6zekTe04XkHhTc2jtLv@mail.gmail.com> <4CE50849.106@zedat.fu-berlin.de> <4CE52177.3020306@freebsd.org> <20101118182324.GA36312@freebsd.org> <20101119044129.GA4063@johnny.reilly.home> <20101119094652.00003652@unknown> <4CE64879.2060802@freebsd.org>
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--mcnwp324tjjFs4IZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Nov 19, 2010 at 11:50:49AM +0200, Andriy Gapon wrote: > on 19/11/2010 11:46 Bruce Cran said the following: > > [removed current@ and stable@ from the Cc list] > >=20 > > On Fri, 19 Nov 2010 15:41:29 +1100 > > Andrew Reilly <areilly@bigpond.net.au> wrote: > >=20 > >> On Linux. Have you ever seen those sorts of UI problems on FreeBSD? > >> I don't watch much video on my systems, but I haven't seen that. > >> FreeBSD has always been good at keeping user-interactive processes > >> responsive while compiles or what-not are going on in the background. > >=20 > > I've definitely seen problems when running builds in an xterm. I've > > often resorted to canceling it and running it on a syscons console > > instead to improve performance. > >=20 >=20 > So, what was it a problem with scheduler or with, e.g., "something X" > being too slow rendering glyphs? Who can tell... Probably will pay a lot in negative karma by posting anything in the thread. But I can confirm your words, that tty->xterm->X server chain of output indeed significantly slows down the build processes. I usually never start build in the barebone xterm, always running screen under xterm. make -j 10 on 4 core/HTT cpu slows up to a half, from my unscientific impression, when run in the active screen window. Switching to other window in screen significantly speeds it up (note the prudent omission of any measured numbers). --mcnwp324tjjFs4IZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAkzmhNgACgkQC3+MBN1Mb4j6BwCg4JGYHhi3OwCkYR0ccv5ro5Ki 8dgAoOsRIy9Sj0SZl8QYOVKghzkcpEYn =QAjw -----END PGP SIGNATURE----- --mcnwp324tjjFs4IZ--
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