Date: Thu, 16 Feb 2012 10:48:39 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Jeff Roberson <jroberson@jroberson.net> Cc: freebsd-hackers@FreeBSD.org, Florian Smeets <flo@FreeBSD.org>, Andriy Gapon <avg@FreeBSD.org> Subject: Re: [RFT][patch] Scheduling for HTT and not only Message-ID: <4F3CC2E7.9070100@FreeBSD.org> In-Reply-To: <alpine.BSF.2.00.1202150949480.2020@desktop> References: <4F2F7B7F.40508@FreeBSD.org> <4F366E8F.9060207@FreeBSD.org> <4F367965.6000602@FreeBSD.org> <4F396B24.5090602@FreeBSD.org> <alpine.BSF.2.00.1202131012270.2020@desktop> <4F3978BC.6090608@FreeBSD.org> <alpine.BSF.2.00.1202131108460.2020@desktop> <4F3990EA.1080002@FreeBSD.org> <4F3C0BB9.6050101@FreeBSD.org> <alpine.BSF.2.00.1202150949480.2020@desktop>
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On 02/15/12 21:54, Jeff Roberson wrote: > On Wed, 15 Feb 2012, Alexander Motin wrote: >> As before I've tested this on Core i7-870 with 4 physical and 8 >> logical cores and Atom D525 with 2 physical and 4 logical cores. On >> Core i7 I've got speedup up to 10-15% in super-smack MySQL and >> PostgreSQL indexed select for 2-8 threads and no penalty in other >> cases. pbzip2 shows up to 13% performance increase for 2-5 threads and >> no penalty in other cases. > > Can you also test buildworld or buildkernel with a -j value twice the > number of cores? This is an interesting case because it gets little > benefit from from affinity and really wants the best balancing possible. > It's also the first thing people will complain about if it slows. All night long buildworld run on Core i7-2600K (4/8 cores) with 8GB RAM and RAID0 of two fast SSDs found no bad surprises: old new % 1 4242.33 4239.69 -0.0622299538 2 2376.4433 2340.47 -1.5137453521 4 1581.3033 1430.1733 -9.5573063055 6 1394.8033 1348.0533 -3.3517270858 8 1365.8067 1315.87 -3.6562055231 10 1312.8533 12 1350.23 1313.2667 -2.7375558238 16 1346.2267 1306.0733 -2.9826625783 20 1313.31 Each point there averaged of 3 runs. -- Alexander Motin
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