From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id E42601381F3 for ; Fri, 20 Sep 2013 13:18:04 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E026FE0AD7; Fri, 20 Sep 2013 13:17:57 +0000 (UTC) Received: from ns1.bonedaddy.net (ns1.bonedaddy.net [70.91.141.202]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id D3925E0A91 for ; Fri, 20 Sep 2013 13:17:56 +0000 (UTC) Received: from ns1.bonedaddy.net (localhost [127.0.0.1]) by ns1.bonedaddy.net (8.14.6/8.14.4) with ESMTP id r8KDHtHc019108 for ; Fri, 20 Sep 2013 09:17:55 -0400 Received: (from tgoodman@localhost) by ns1.bonedaddy.net (8.14.7/8.14.7/Submit) id r8KDHt0s019082 for gentoo-user@lists.gentoo.org; Fri, 20 Sep 2013 09:17:55 -0400 X-Authentication-Warning: ns1.bonedaddy.net: tgoodman set sender to tsg@bonedaddy.net using -f Date: Fri, 20 Sep 2013 09:17:55 -0400 From: Todd Goodman To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] The meaning of number in brackets in /proc/cpuinfo "power management"? Message-ID: <20130920131755.GA3102@ns1.bonedaddy.net> References: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Archives-Salt: cac43f2b-04d0-4df5-8dcd-9018915dc6a2 X-Archives-Hash: 84623c8feaa9234255dee1d15b05cd0a * Pandu Poluan [130920 03:45]: > Hello list! > > Does anyone know the meaning of the 'number between brackets' in the > "power management" line of /proc/cpuinfo? > > For instance (I snipped the "flags" line to not clutter the email: > > processor : 0 > vendor_id : AuthenticAMD > cpu family : 21 > model : 2 > model name : AMD Opteron(tm) Processor 6386 SE > stepping : 0 > cpu MHz : 2800.110 > cache size : 2048 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : --snip-- > bogomips : 5631.71 > clflush size : 64 > cache_alignment : 64 > address sizes : 48 bits physical, 48 bits virtual > power management: ts ttp tm 100mhzsteps hwpstate [9] [10] > > What's "[9]" and "[10]" supposed to mean? > > (Note: The OS is not actually Gentoo, but this list is sooo > knowledgeable, and methinks the output of /proc/cpuinfo is quite > universal...) I don't know for sure but looking in arch/x86/cpu/{powerflags,proc}.c it looks like your kernel doesn't have a text description for power flag bits 9 and 10. In Linux 3.11.1 they are: [9] - "cpb", /* core performance boost */ [10] - "eff_freq_ro", /* Readonly aperf/mperf */ Todd