From owner-freebsd-acpi@FreeBSD.ORG Mon Nov 4 22:28:25 2013 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 79531FC; Mon, 4 Nov 2013 22:28:25 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-qc0-x233.google.com (mail-qc0-x233.google.com [IPv6:2607:f8b0:400d:c01::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 2A1CE27F0; Mon, 4 Nov 2013 22:28:25 +0000 (UTC) Received: by mail-qc0-f179.google.com with SMTP id k18so4365057qcv.10 for ; Mon, 04 Nov 2013 14:28:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=jJ8t4pNyFsk63G98Zg0Vt5PtUeB2sxxsM80Pkz/B1sc=; b=iUsbXXml8XXK3Y26lTNIZkJ4quMkk9p0twMsaz573IV48/HN3I2lsED2t2ixd6UbeC yMD1mBhr/A04TqqBNVgJLzv/+87tQHJJsau3dRBd6wlEqAvu4f7/Cy51DFJk1/hasMXY mht6Kb2Hl78qTGmcMR5+qIZjuLkTgvQjA/nHLCldbHHyAGB4eEiXPZOjfp+WUAY6Ktlt cm1bYo4Hx/rbkigTVb7Sixk+beiJCb36w/3qBCQNQSLcCBnlkmnda55I80Usa+JfX5wz wxz70L9c5eHIzcz2owSI2JBlVVxm8gbIsXc4lHmyXnc4YNmcvcN13E7/mJtlNe+8FGe6 gL9Q== MIME-Version: 1.0 X-Received: by 10.49.62.3 with SMTP id u3mr25021938qer.6.1383604104430; Mon, 04 Nov 2013 14:28:24 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.224.207.66 with HTTP; Mon, 4 Nov 2013 14:28:24 -0800 (PST) In-Reply-To: <20131104222454.GU59496@kib.kiev.ua> References: <201311041453.03864.jhb@freebsd.org> <20131104222454.GU59496@kib.kiev.ua> Date: Mon, 4 Nov 2013 14:28:24 -0800 X-Google-Sender-Auth: O8fZ6N1HOJRHKG1I1KY1N6ENG-Y Message-ID: Subject: Re: Xeon E5 cpu work in low status From: Adrian Chadd To: Konstantin Belousov Content-Type: text/plain; charset=ISO-8859-1 Cc: Kevin Oberman , "freebsd-acpi@freebsd.org" , ?????? X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Nov 2013 22:28:25 -0000 On 4 November 2013 14:24, Konstantin Belousov wrote: > My Intel board DQ67OW starts with the fixed CPU speed, which is > configurable in BIOS. Unless OS starts managing the frequency with the > cpufreq and powerd, CPU is locked to the pre-configured speed. It was > not easy to understand why my single-user memory b/w benchmarks show > half of the expected throughput for the cache, until I found the setting > and found that Intel defaults to 1/2 of the marketing frequency. > > For my board, it is Performance->Processor Overrides->Maximum Non-Turbo > Ratio. It was set to 17, normal CPU mode is 34, turbo is 38 max. Does powerd throttle each individual core like this? I don't have anything laptop-y that's recent enough for that to matter. -adrian