From owner-freebsd-questions@FreeBSD.ORG Tue Nov 9 11:21:43 2010 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 C73FF1065679 for ; Tue, 9 Nov 2010 11:21:43 +0000 (UTC) (envelope-from naylor.b.david@gmail.com) Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id 566378FC0A for ; Tue, 9 Nov 2010 11:21:42 +0000 (UTC) Received: by wya21 with SMTP id 21so8303wya.13 for ; Tue, 09 Nov 2010 03:21:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:subject:date :user-agent:mime-version:content-type:content-transfer-encoding :message-id; bh=ZliKjh4FuNMVhYRm0wdEw8q8yd1ogMbTQ53IFd3sY8Y=; b=vEPE4mcOvu5ciFQDAybsYKJX69n0F+DlYoRjw946BEjhcGa5OkG+quytoGdaDLtuC/ 3vC0AAzsPdkf2+cPy4lRCidrICePwZAv7vkg1E2HmgUtjJIe2DrunUGDy5bn9VGDPdTs e1krpeTdajPw3A5ZQnodioJtlVRAxewZg+R6Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:mime-version:content-type :content-transfer-encoding:message-id; b=RgNMDujgdss30SBmwj4UPr/FeWMG7GISiTVRPlsSYTmx/zaZp9jA0YmKLN961Uiw/6 RuRh2DlOsjY72n1nQpJ6FVL715qbZLz62kP/d9t0CHxAS9ftL7OdlLJqVHSxgQ+fRD8T p8ZMZ8fcy73s8jCsWZ+XA7z+R7CJjPC146vrs= Received: by 10.216.37.4 with SMTP id x4mr717133wea.1.1289300222070; Tue, 09 Nov 2010 02:57:02 -0800 (PST) Received: from dragon.dg (41-132-25-89.dsl.mweb.co.za [41.132.25.89]) by mx.google.com with ESMTPS id w8sm749923wei.45.2010.11.09.02.56.59 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 09 Nov 2010 02:57:00 -0800 (PST) From: David Naylor To: freebsd-questions@freebsd.org Date: Tue, 9 Nov 2010 12:56:47 +0200 User-Agent: KMail/1.13.5 (FreeBSD/9.0-CURRENT; KDE/4.5.1; amd64; ; ) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2252254.sIIy87fQHX"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201011091256.51140.naylor.b.david@gmail.com> Subject: Per core frequency control 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: Tue, 09 Nov 2010 11:21:43 -0000 --nextPart2252254.sIIy87fQHX Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I was reading through cpufreq(4) and in the bugs section it mentions that p= er=20 core (or CPU) frequency control is not supported. That all cores/CPUs have= to=20 be at the same speed. =20 What is the reason for that? =20 Is it an infrastructure problem with FreeBSD or has it just not been=20 implemented? =20 And how will the recent work on event timers (and a "tickless" kernel) impa= ct=20 on this problem?=20 Regards, David --nextPart2252254.sIIy87fQHX Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEABECAAYFAkzZKPMACgkQUaaFgP9pFrKAgwCdHJuFWvkOayMJpuu5GYTiZGpj k0YAn1gKPLX5jNS/n2xt7qYtqoX6Psve =xWtz -----END PGP SIGNATURE----- --nextPart2252254.sIIy87fQHX--