Date: Sat, 10 Nov 2007 21:14:44 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: josh.carroll@gmail.com Cc: Jeff Roberson <jroberson@chesapeake.net>, freebsd-performance@freebsd.org Subject: Re: ULE vs. 4BSD in RELENG_7 Message-ID: <47361134.3050301@FreeBSD.org> In-Reply-To: <8cb6106e0711101158o16887999rf7f7302ad44d0de8@mail.gmail.com> References: <8cb6106e0710230902x4edf2c8eu2d912d5de1f5d4a2@mail.gmail.com> <8cb6106e0711032221i2ecf1d59ge82f368d4162a827@mail.gmail.com> <20071104122546.S544@10.0.0.1> <8cb6106e0711041243s37ef92e3i9c5c79827f547dbb@mail.gmail.com> <20071104151722.M544@10.0.0.1> <8cb6106e0711050141g674a7733h53f7e6a20e75ad07@mail.gmail.com> <20071106171059.M544@10.0.0.1> <8cb6106e0711062136r18ca8e67sbdb4d4372e10e086@mail.gmail.com> <20071109145827.W639@10.0.0.1> <8cb6106e0711091855x1305ee2bt6d57696df7c7564@mail.gmail.com> <8cb6106e0711101158o16887999rf7f7302ad44d0de8@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Josh Carroll wrote: >> ffmpeg: 1:38.885 >> >> sysbench: (4,8,12,16 threads respectively): >> 2221.93 >> 2327.87 >> 2292.49 >> 2269.29 >> >> And buildworld: 13m47.052s > > I ran these after changing the slice value to 7 as well with this patch. > > ffmpeg: 1:38.547 BTW, it doesn't make much sense to be measuring to millisecond precision a quantity which has variation that is unknown but probably much larger :) When trying to make comparisons to identify performance changes, a careful statistical approach is necessary. Try the /usr/src/tools/tools/ministat utility for a simple and effective way to compare these kinds of noisy measurements and extract reliable comparisons. Kris
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?47361134.3050301>