From owner-freebsd-questions@FreeBSD.ORG Wed May 18 10:57:36 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 28D03106566C for ; Wed, 18 May 2011 10:57:36 +0000 (UTC) (envelope-from reko.turja@liukuma.net) Received: from www.liukuma.net (www.liukuma.net [IPv6:2001:470:28:38a::1]) by mx1.freebsd.org (Postfix) with ESMTP id B70118FC08 for ; Wed, 18 May 2011 10:57:35 +0000 (UTC) Received: from www.liukuma.net (localhost [127.0.0.1]) by www.liukuma.net (Postfix) with ESMTP id 3F6511CC8F for ; Wed, 18 May 2011 13:57:34 +0300 (EEST) X-DKIM: Sendmail DKIM Filter v2.8.3 www.liukuma.net 3F6511CC8F DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=liukuma.net; s=liukudkim; t=1305716254; bh=ycR/PHNf2GeY2bnL58oVNxBL961MUvpfuk7muDRWt3o=; h=Message-ID:From:To:References:In-Reply-To:Subject:Date: MIME-Version:Content-Type:Content-Transfer-Encoding; z=X-Virus-Scanned:=20amavisd-new=20at=20liukuma.net|X-DKIM:=20Sendm ail=20DKIM=20Filter=20v2.8.3=20www.liukuma.net=20C77A61CC8B|Messag e-ID:=20<9D9581D0C8E84BF1B3BBFF2B8F696AD5@rivendell>|From:=20"Reko =20Turja"=20|To:=20"FreeBSD=20Questions"=2 0|References:=20<022d01cc14f5$a37ef 010$ea7cd030$@vicor.com>|In-Reply-To:=20<022d01cc14f5$a37ef010$ea7 cd030$@vicor.com>|Subject:=20Re:=20Buildworld=20Benchmarks|Date:=2 0Wed,=2018=20May=202011=2013:57:39=20+0300|MIME-Version:=201.0|Con tent-Type:=20text/plain=3B=0D=0A=09format=3Dflowed=3B=0D=0A=09char set=3D"iso-8859-1"=3B=0D=0A=09reply-type=3Doriginal|Content-Transf er-Encoding:=20quoted-printable|X-Priority:=203|X-MSMail-Priority: =20Normal|Importance:=20Normal|X-Mailer:=20Microsoft=20Windows=20L ive=20Mail=2014.0.8117.416|X-MimeOLE:=20Produced=20By=20Microsoft= 20MimeOLE=20V14.0.8117.416; b=m2nvRPnXgwZWKQCH0wt3CWmL0mYkNgxurlB4Vp+M9Se8GREHlC6RwNuVrkzq1/GK6 tDowpVz9rpruXhoEtK5vFh94qzxfYpdzhU0mW0XEFTK5IAQ39bviDAtbmQMQQjnBtV W7f8acczuhK4lwGIbvKEPt+GR+hvZE56DmFCfM5Q= X-Virus-Scanned: amavisd-new at liukuma.net Received: from www.liukuma.net ([127.0.0.1]) by www.liukuma.net (www.liukuma.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id mfLdgGQcmS5J for ; Wed, 18 May 2011 13:57:30 +0300 (EEST) Received: from rivendell (a91-155-174-194.elisa-laajakaista.fi [91.155.174.194]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client did not present a certificate) (Authenticated sender: ignatz@www.liukuma.net) by www.liukuma.net (Postfix) with ESMTPSA id C77A61CC8B for ; Wed, 18 May 2011 13:57:27 +0300 (EEST) X-DKIM: Sendmail DKIM Filter v2.8.3 www.liukuma.net C77A61CC8B Message-ID: <9D9581D0C8E84BF1B3BBFF2B8F696AD5@rivendell> From: "Reko Turja" To: "FreeBSD Questions" References: <022d01cc14f5$a37ef010$ea7cd030$@vicor.com> In-Reply-To: <022d01cc14f5$a37ef010$ea7cd030$@vicor.com> Date: Wed, 18 May 2011 13:57:39 +0300 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: quoted-printable X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 Subject: Re: Buildworld Benchmarks X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 May 2011 10:57:36 -0000 > We thought going tmpfs would make things faster, but that resulted=20 > in over 13 > minutes (huh? you'd think a RAM disk would be smoking compared to=20 > even the SSDs > that we used to achieve ~9 min; do note that we did make sure to=20 > nullfs mount a > tmpfs-based directory onto /usr/obj -- though the performance of=20 > that nullfs > mount might have hurt the test, not sure). I think that doing huge parallel build and using part of memory bus=20 bandwidth for storage is the culprit. DMA offloading the storage=20 operations directly from memory to the disks is giving the advantage=20 to builds using disk IO. -Reko=20