Date: Sun, 22 Sep 2013 12:16:43 +0800 (CST) From: "Starnovo Battery" <starnovobattery@vip.126.com> To: questions@FreeBSD.org Subject: About Lithium ion polymer battery packs Message-ID: <73a3bcf3.44a1.14143e240a0.Coremail.starnovobattery@vip.126.com>
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CgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoK CgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoK CgoKCgoKCgoKCgoK From owner-freebsd-questions@FreeBSD.ORG Sun Sep 22 12:10:41 2013 Return-Path: <owner-freebsd-questions@FreeBSD.ORG> Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 1D689C75 for <freebsd-questions@freebsd.org>; Sun, 22 Sep 2013 12:10:41 +0000 (UTC) (envelope-from emorrasg@yahoo.es) Received: from nm19-vm0.bullet.mail.ird.yahoo.com (nm19-vm0.bullet.mail.ird.yahoo.com [77.238.189.92]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 46FF02B99 for <freebsd-questions@freebsd.org>; Sun, 22 Sep 2013 12:10:38 +0000 (UTC) Received: from [77.238.189.234] by nm19.bullet.mail.ird.yahoo.com with NNFMP; 22 Sep 2013 12:10:30 -0000 Received: from [46.228.39.99] by tm15.bullet.mail.ird.yahoo.com with NNFMP; 22 Sep 2013 12:10:30 -0000 Received: from [127.0.0.1] by smtp136.mail.ir2.yahoo.com with NNFMP; 22 Sep 2013 12:10:30 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.es; s=s1024; t=1379851830; bh=v9P/mtSdnUqx2L+56UGSq71Gedel2WmH/+4ov6hgstA=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Date:From:To:Subject:Message-Id:In-Reply-To:References:X-Mailer:Disposition-Notification-To:Mime-Version:Content-Type:Content-Transfer-Encoding; b=1o0ZgbKo1K1Me4/u3AfNvb0kw7+Ns01g64vuTT5QAGciw4FZKbYlcwgmwF79+BWb4NqcR9mLSkP2bH775CAlig7XvTFmXUji2XaDSz3FiuRirNoaZ23N+Tmi7rRuKfGbhqMgLt7TbVLFkV5/IIp6POPc2HDZ5bA7clhmAdtNykg= X-Yahoo-Newman-Id: 427419.64419.bm@smtp136.mail.ir2.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 4uHEtWUVM1nihfjrWJ_.kxwiGx6xEAYf9qRWAHYykOk9lAc vvztSuaCXJ6x6y7OcAS2sCVNSENRyajbFcLnKnrbvjLMPbFdp0OkRRTOk.NO MDcwlbOsN25L65BJxa4U1atYpeJ4ziblCCzbm.8VpcgSTYKU4ScDi1O6BwxX pmZaI1mYFpFJp_3DnJqjKUoUIflkp0LTokSNsxudhu9nWAX6Lt.DoLUcuqsY mtTyUAturdcHeuOLETFyokXxPSxIgtqyJqy9NiAbzUzdqv.mmpt9NTs1CPjB w589z09hToC2uE3Qzn9HoLh7P3vIdpxYCWaiu6GJ1_D8LzazNGmKz2u2_u3Z 8P8CcZ9Y3ocDTykQcS22ycAntTCAYnE4dM2.Z6ZHaNVaGrjD9rgAeI91LU3B xws9rOjAcS0zEQSlanVIsnbE0uwCDJYqYBZo0tyClW5ZH9DqPO0iTi19azwe 4gEfYDPvSxeMs_JVYVifBvxPXmtlz8dNJIZJDzp67LotKPiW4valmXoo- X-Yahoo-SMTP: mX392iiswBAeJNdO_s.EW62LZDJR X-Rocket-Received: from camibar.emorras.eu (emorrasg@89.7.216.154 with ) by smtp136.mail.ir2.yahoo.com with SMTP; 22 Sep 2013 12:10:30 +0000 UTC Date: Sun, 22 Sep 2013 14:10:34 +0200 From: Eduardo Morras <emorrasg@yahoo.es> To: freebsd-questions@freebsd.org Subject: Re: this 48-core box... Message-Id: <20130922141034.d98d472e42c784062d66651c@yahoo.es> In-Reply-To: <CAJ-VmonDO3rbbctx-m3HF=7_m2EfjVh0n=yaM4=FhJdOtXnK8w@mail.gmail.com> References: <52388C9B.6030205@foxbatcapital.com> <20130919155327.115e7344@sarvision.nl> <alpine.BSF.2.00.1309191157410.56073@btw.pki2.com> <20130920110535.42c984da@sarvision.nl> <CAJ-VmonDO3rbbctx-m3HF=7_m2EfjVh0n=yaM4=FhJdOtXnK8w@mail.gmail.com> X-Mailer: Sylpheed 3.3.0 (GTK+ 2.24.19; amd64-portbld-freebsd9.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Sun, 22 Sep 2013 12:10:41 -0000 On Sat, 21 Sep 2013 12:53:36 -0700 Adrian Chadd <adrian@freebsd.org> wrote: > .. just as a data point - there was a thread a while ago about numeric > processing performance on linux vs bsd. > > It all boiled down to how jemalloc versus the linux allocator(s) allocate > blocks. jemalloc will page align things after a certain size. Linux didn't. > So when doing numeric processing, there was a lot of cache aliasing going > on leading to inefficient cache usage and redundant memory operations. > > When the same workload on Linux was run on FreeBSD but with the Linux > library/allocators, the performance was identical. > > No-one followed through. I think I may have to write a blog post about it. There's no MALLOC_OPTIONS flag to set/unset this, but adding a new flag to disable a feature is easier (or should be) than implementing new one. The only problem I see to this is if the cache align happens at sbrk/mmap level. > > -adrian > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" --- --- Eduardo Morras <emorrasg@yahoo.es>
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