From owner-freebsd-amd64@FreeBSD.ORG Sun Jan 8 11:30:14 2012 Return-Path: Delivered-To: freebsd-amd64@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1EE91106566B for ; Sun, 8 Jan 2012 11:30:14 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id E7EA48FC0A for ; Sun, 8 Jan 2012 11:30:13 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q08BUDqK099334 for ; Sun, 8 Jan 2012 11:30:13 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q08BUDvk099331; Sun, 8 Jan 2012 11:30:13 GMT (envelope-from gnats) Date: Sun, 8 Jan 2012 11:30:13 GMT Message-Id: <201201081130.q08BUDvk099331@freefall.freebsd.org> To: freebsd-amd64@FreeBSD.org From: umage X-Mailman-Approved-At: Sun, 08 Jan 2012 11:46:50 +0000 Cc: Subject: Re: amd64/160561: no C-states on atom D525 X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: umage List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Jan 2012 11:30:14 -0000 The following reply was made to PR amd64/160561; it has been noted by GNATS. From: umage To: bug-followup@FreeBSD.org, theultramage@gmail.com Cc: Subject: Re: amd64/160561: no C-states on atom D525 Date: Sun, 08 Jan 2012 12:05:42 +0100 A freebsd user with an identical issue pointed me at http://download.intel.com/embedded/processors/prodbrief/323288.pdf which lists various atom processors and their "C-states supported". Turns out D525 has no C-state power management, so what we encountered was not a bug, but an intentional (but not advertised) hardware 'feature'.