From owner-freebsd-current@FreeBSD.ORG Wed May 18 23:20:31 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6D53916A4CE; Wed, 18 May 2005 23:20:31 +0000 (GMT) Received: from obsecurity.dyndns.org (CPE0050040655c8-CM00111ae02aac.cpe.net.cable.rogers.com [69.194.102.232]) by mx1.FreeBSD.org (Postfix) with ESMTP id BFD4D43D2F; Wed, 18 May 2005 23:20:30 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 510C651290; Wed, 18 May 2005 16:20:27 -0700 (PDT) Date: Wed, 18 May 2005 16:20:27 -0700 From: Kris Kennaway To: current@FreeBSD.org Message-ID: <20050518232027.GA9935@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="BOKacYhQ+x31HxR3" Content-Disposition: inline User-Agent: Mutt/1.4.2.1i cc: smp@FreeBSD.org Subject: ADAPTIVE_GIANT benchmark X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 May 2005 23:20:31 -0000 --BOKacYhQ+x31HxR3 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline I reran the 12-concurrent tarball extraction with adaptive giant enabled/disabled, on the 12-processor e4500: real time: x adaptive-giant + no-adaptive-giant +--------------------------------------------------------------------------+ | x + x | | + x + + x | | x + xx *x ++ xx+ + | | x + ** ** *+ xx*+ + + | | x x+ **+** ** *x**** * * +x + | | x x x x+x*****************x*x* +x+ * + | |x xxx **+x*x*********************x+x* * ++++ + + +x + +| | |________A_________| | | |_________M_A__________| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 100 77.48 89.74 82.17 82.2382 2.2768285 + 99 79.02 94.62 82.77 83.29596 2.6837291 Difference at 95.0% confidence 1.05776 +/- 0.691261 1.28621% +/- 0.840559% (Student's t, pooled s = 2.48758) system time: x adaptive-giant + no-adaptive-giant +--------------------------------------------------------------------------+ | +x | | x +x + | | x x xxx* x +* + | | xx x+ xx** * +* + + + | | xx x* x***x * ** ++ x+** + + + | | x xxxx*x+x******x****++*+** +++++ x ++ | |x x x x*xx****x**x******************* *++**++***+*+ *+ + +| | |_________MA__________| | | |__________MA___________| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 100 428.87 515.95 468.41 469.8407 15.138894 + 99 448.08 528.59 478.97 480.89152 15.913392 Difference at 95.0% confidence 11.0508 +/- 4.31528 2.35203% +/- 0.918455% (Student's t, pooled s = 15.529) user time x adaptive-giant + no-adaptive-giant +--------------------------------------------------------------------------+ | xx + | | x xx + + | | x xxx *x *x *++ + +++ | | xx +xxx xx*+*x+**+*++ +* x *+++ | | x xx*x+xx*+*+*x***x******* **+* *++++ + | |x+ x * + +x* xx*x*x***********************+*+**+*++xx x+ +x+ +| | |___________A__________| | | |____________A___________| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 100 27.66 28.96 28.35 28.3449 0.22686932 + 99 27.67 29.1 28.47 28.459899 0.24268269 Difference at 95.0% confidence 0.114999 +/- 0.0652666 0.405713% +/- 0.230259% (Student's t, pooled s = 0.234869) So adaptive giant is in fact a small net win in all 3 measurements. I'm not sure whether my previous measurements with generic build were incorrect or have some other explanation. Kris --BOKacYhQ+x31HxR3 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCi826Wry0BWjoQKURAkkWAJ4pK6rLBcNag7cuHmfYJrC+suYxNwCgn0vB nMRGPh+4uZc8XOA5Mp3GV7s= =Lbfw -----END PGP SIGNATURE----- --BOKacYhQ+x31HxR3--