Date: Fri, 9 Nov 2007 18:55:19 -0800 From: "Josh Carroll" <josh.carroll@gmail.com> To: "Jeff Roberson" <jroberson@chesapeake.net> Cc: freebsd-performance@freebsd.org Subject: Re: ULE vs. 4BSD in RELENG_7 Message-ID: <8cb6106e0711091855x1305ee2bt6d57696df7c7564@mail.gmail.com> In-Reply-To: <20071109145827.W639@10.0.0.1> References: <8cb6106e0710230902x4edf2c8eu2d912d5de1f5d4a2@mail.gmail.com> <20071103133711.Q544@10.0.0.1> <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>
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> Josh, I had an interesting thought today. What if the reason 4BSD is > faster is because it distributes load more evenly across all packages > because it distributes randomly? ULE distributed across cores evenly but > not packages. Can you try the attached patch? This also turns the > default slice size down but does not contain the other context switch > performance improvements. Hi Jeff, here are the results: ffmpeg: 1:38.885 sysbench: (4,8,12,16 threads respectively): 2221.93 2327.87 2292.49 2269.29 And buildworld: 13m47.052s Much improved! :) Josh
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