Date: Tue, 6 Dec 2016 23:35:01 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Alexander Motin <mav@freebsd.org> Cc: freebsd-fs@freebsd.org, Andriy Gapon <avg@freebsd.org> Subject: Re: 11-STABLE vs 11.0-RELENG test Message-ID: <alpine.BSF.2.00.1612062329560.90682@woozle.rinet.ru> In-Reply-To: <8b4ba98d-03d3-f671-33b2-ed12d3b4fb7c@FreeBSD.org> References: <8b4ba98d-03d3-f671-33b2-ed12d3b4fb7c@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 6 Dec 2016, Alexander Motin wrote: [snip] > > So, ZFS write code in 11-STABLE looks broken. > > I've reproduced this issue with quick test on my lab system configured > with 12-disk RAIDZ2 pool. I've measured write and read back (with and > without prefetch) speeds for pool recreated on different FreeBSD head > revisions: > r309625 r305456 r305330 r305322 > write 702 701 1115 1120 > read w/ pref 232 228 518 512 > read w/o pref 128 126 242 240 > > I suspect we could obtain the problem here: > > r305331 | mav | 2016-09-03 13:04:37 +0300 (сб, 03 сент. 2016) | 45 lines > > MFV r304155: 7090 zfs should improve allocation order and throttle > allocations > > I'll take closer look on that change tomorrow. Thanks a lot for quick test, I'll abandon my weak test lab then. -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1612062329560.90682>