From owner-freebsd-questions@freebsd.org Sat Nov 14 14:18:33 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1DE1DA2EA04 for ; Sat, 14 Nov 2015 14:18:33 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-wm0-x232.google.com (mail-wm0-x232.google.com [IPv6:2a00:1450:400c:c09::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9FA651B1D for ; Sat, 14 Nov 2015 14:18:32 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by wmec201 with SMTP id c201so118707717wme.0 for ; Sat, 14 Nov 2015 06:18:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=KDTVItT2oNKz281XtMXa8Z6P+O2aEnxVa9UcuI8gCs8=; b=uStcgIckw3maWXoISo/KZxugQbgQvn4A4Mjn+1hJxUG0QiJXcvcsKzJuE5t3UmR4/U dn2Yp/s2YgcvNNAJqG+7mk7tkjOF33T1CSHbigx+v4KEFYBsT79brspb/QFrfnsI0Pb9 1Xa8hN5ymdxd9IqZZ7b4lOsqITgK3DvSa3v0kQDrsud96PhuwfVKEfjyjalWGSFl2Wr6 ygezDNTZz4jS7adV9WbNgSCBwq32rCmKtQ4awkgWlwUqVXbmbEwxpuvRng8FlemNc3Mb amTekRNfRIIM2nUyCDCZLy1P3hxjozzXzjQVTyca0M9QURIkyFjcKkRMXWG2QN2TW/HO /ITQ== MIME-Version: 1.0 X-Received: by 10.194.71.147 with SMTP id v19mr22217979wju.142.1447510710925; Sat, 14 Nov 2015 06:18:30 -0800 (PST) Received: by 10.194.16.231 with HTTP; Sat, 14 Nov 2015 06:18:30 -0800 (PST) In-Reply-To: <20151114215226.I27669@sola.nimnet.asn.au> References: <20151016224929.Q15983@sola.nimnet.asn.au> <20151017232247.P15983@sola.nimnet.asn.au> <20151019175116.X15983@sola.nimnet.asn.au> <20151114022704.Y55748@sola.nimnet.asn.au> <20151114215226.I27669@sola.nimnet.asn.au> Date: Sat, 14 Nov 2015 08:18:30 -0600 Message-ID: Subject: Re: est From: Adam Vande More To: Ian Smith Cc: john.haraden@yahoo.com, FreeBSD Questions Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Nov 2015 14:18:33 -0000 On Sat, Nov 14, 2015 at 6:33 AM, Ian Smith wrote: > > > I do > > > know that FreeBSD never, so far, runs different cores at any different > > > frequencies, > > > > FreeBSD has supported TurboBoost for years. > > Of course. But we do NOT support setting different CPU frequencies on > different cores. Well of course, but that's not what you said initially which is what prompted my response. > TurboBoost may clock selected cores up to turbo speed, > internally determined by microcode, but that has nothing to do with the > clock speed FreeBSD sets for ALL CPUs, except that the highest (XX01) > setting is what _enables_ turboboost, and then for ALL cores. > > Quoting from the referenced article in question: > > https://www.ateamsystems.com/tech-blog/increase-freebsd-performance-with-powerd/ > > Do I need to detail the several incorrect assumptions at play above, > regarding FreeBSD's role in interacting with the CPU/s re TurboBoost in > particular and SpeedStep in general? > I do not believe you need to do that. That link or any other external source has never been the basis of my response. I agree the link contains some dubious claims and methodology, however the heart of it is sort of close enough to accurate. > I don't know what you've done to disable a generally useful feature, > > but I suggest re-enabling it on your systems if you want better > > single core performance. > > If you read my post you'd know precisely what I'd done to disable the > feature that proves less than useful on my particular CPU, running both > hotter and (marginally) SLOWER on repeatedly timed single-core tasks, > and considerably hotter on longer multi-core tasks like -j buildworld. > You don't have TurboBoost, so what ever results you have can't be applied to a TurboBoost generalization. My suggestion for you to re-enable TurboBoost was also flawed. Getting rid of my Core2 stuff was a happy time for me. Don't get me wrong, it was great when it came around but it's so slow and power hungry compared to even a sandybridge. > Don't take my word for it .. please read: > http://lists.freebsd.org/pipermail/freebsd-mobile/2015-February/013240.html > then feel free to argue with Warner about advice that worked for me :) > I don't even understand what there would be to argue with him about. His particular setup may have heat issues when utilizing TurboBoost for an extended period/load. My systems do not and they operate in turbo mode much of the time, at least as far as I've checked it. It is not something I monitor continuously. My current main workstation, a m6600, can have heat issues if the external video slot is filled. Without it, it works great under all conditions. And the OP's post which started this was nonsensical so I have no comment in that regard other than EST is not magic. It doesn't just go off and on. -- Adam