Date: Sun, 6 Jul 2014 11:46:15 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-fs@freebsd.org, Stefan Parvu <sparvu@systemdatarecorder.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org>, Roger Pau Monn? <roger.pau@citrix.com> Subject: Re: Strange IO performance with UFS Message-ID: <20140706084615.GC93733@kib.kiev.ua> In-Reply-To: <CAJ-VmokaFaPfEGMjMHkQhhavjtyqmcNWE1uMmgpm7xFtqD7gzg@mail.gmail.com> References: <20140705001938.54a3873dd698080d93d840e2@systemdatarecorder.org> <53B7C616.1000702@citrix.com> <20140705095831.GO93733@kib.kiev.ua> <53B7D4DF.40301@citrix.com> <20140705112448.GQ93733@kib.kiev.ua> <53B8253F.5060403@citrix.com> <20140705195816.GV93733@kib.kiev.ua> <CAJ-VmonRzEPoRYJd=HLk3F4p1cxUmJ5mFurYWoMFF5rFkH42Cw@mail.gmail.com> <20140706071735.GZ93733@kib.kiev.ua> <CAJ-VmokaFaPfEGMjMHkQhhavjtyqmcNWE1uMmgpm7xFtqD7gzg@mail.gmail.com>
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--ukxn79E1+tniTzNx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jul 06, 2014 at 01:13:29AM -0700, Adrian Chadd wrote: > On 6 July 2014 00:17, Konstantin Belousov <kostikbel@gmail.com> wrote: > > On Sat, Jul 05, 2014 at 05:34:48PM -0700, Adrian Chadd wrote: > >> Hm, wait a sec. So if the IO size is a multiple of the underlying FS > >> block size, it should be okay? > > It was already suggested in the thread, and confirmed later. > > Did you read the mails ? >=20 > I did, I must've missed it. SOrry! The thread was definitely long. I am slightly curious how other systems perform in this case. In particular, since fio is originating from Linux, it probably should demonstrate some good behaviour with the default settings. --ukxn79E1+tniTzNx Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJTuQzXAAoJEJDCuSvBvK1Bx4EP/0CIhDbDLKo2xYiw6d2pIbCd Rj9Izf5EiERXCcdk9iEOGxzplocMuf1zxLd5sx9to4AuBO0c8Wo853z7fjdiFT69 7mPR2jQAyuXMWzNiH5sOrAS2ZpSODnNrziZm2M6coDT+q980jhIzuNZ/91/QUhdm zXCUgbxclI0epbnNnmiTprsV58pEW2I7p2KE1LJ20eBqatQdyh9yAHWL5iP3+XSV 38b6Aux9+ICWoK0qxdLqltXcga9z/vEq7BeGwcio/hzmrZ7KQol7Vwro/tHfKmHT b1L5E9u22cepQvjiHhqXgiXm3maaQqYZKj3AhrfNaFPy9Txu1CRxozY2EL+DykqS 998BJmsQi/H+0ZL7L+g20Ge//flnRD+nk+iSJL1Y4yh4baltcDzHpQMqvBVmVZvC 9dcyaVODpNzUyeOZ8vzrOdhBx2FD6UN4EzNfi8n5hHfcaJU9gYlbWP0981lj1ITT SHYW00YtBPQ0Eqn3HtsTGk1hx3yCknIqB26TwiJHTwIaQ/TnvkBI+ZdArcjpvj3B veFHES+Drzc/Yb6R8ccrmQAzJLdra1sMMM43K1dmPN9mKoLA10HHkZRlJibpCI1U 5k6lk77WmdeUx86MjoYPYlZsAFO+V3d3mcL8+sHvGPticJblGAEFbuLayIp4xiGi w6fEogzflhWANIXMByBk =JtJc -----END PGP SIGNATURE----- --ukxn79E1+tniTzNx--
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