From owner-svn-src-all@freebsd.org Thu Jan 23 20:02:32 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B98B31FC6B8; Thu, 23 Jan 2020 20:02:32 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: from mail-ot1-f44.google.com (mail-ot1-f44.google.com [209.85.210.44]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 483Y8m4WFrz43dD; Thu, 23 Jan 2020 20:02:32 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: by mail-ot1-f44.google.com with SMTP id b18so4020081otp.0; Thu, 23 Jan 2020 12:02:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=+WknDnLW9YP/oo6LMa5CmfawK4WnuKbfV5hG8hLcsr0=; b=JKv62OU4or7SFW531LdIhbCJ+HGDAqvQsvJnUf7DZs8gBoL2z7Vd962NAv5AIMnsn2 XOJYsziA0ebGIveFZAwDnCi1hI9QKqA4H9DHdlTMwJRBFAVJXRTQe9g94bmn4MlTV8qc jXZQdz1IRXID1lGHL/KZQGenzKSYQixYFBoqidGSlWtoyeIvGT0AgH76UfWC+854udK5 pHFnvSjpphqRrt0snzzgyf3rjQq82Ga3pKNmDXTuBfm5+e9nHozbmLYq4XkEQCF6DurY 0II21e0bJ/5nspqec96LOROTdORgByMrOeBFfHVhCiiInh45u6QVI6qCm1UutxOk57G0 AxMA== X-Gm-Message-State: APjAAAVO5X/HCTYk+QEJb2n+E8mAZqJUje5lghxBDcKN2oVY2/7Hmn44 tK2sENJvenUl8lLCpajfIoHu1ngH X-Google-Smtp-Source: APXvYqwOlXkY7fcV889hbxIVlN+N2QuK3S+r8m5kIj5p5bzYKYgO07Gbu2xjoR2edh1cWGot65XVRw== X-Received: by 2002:a05:6830:1f13:: with SMTP id u19mr19436otg.237.1579809750632; Thu, 23 Jan 2020 12:02:30 -0800 (PST) Received: from mail-ot1-f46.google.com (mail-ot1-f46.google.com. [209.85.210.46]) by smtp.gmail.com with ESMTPSA id u33sm1148697otb.49.2020.01.23.12.02.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Jan 2020 12:02:29 -0800 (PST) Received: by mail-ot1-f46.google.com with SMTP id a15so4006081otf.1; Thu, 23 Jan 2020 12:02:29 -0800 (PST) X-Received: by 2002:a05:6830:1116:: with SMTP id w22mr52060otq.216.1579809748526; Thu, 23 Jan 2020 12:02:28 -0800 (PST) MIME-Version: 1.0 References: <202001222328.00MNSh8a058358@repo.freebsd.org> In-Reply-To: Reply-To: cem@freebsd.org From: Conrad Meyer Date: Thu, 23 Jan 2020 12:02:17 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: svn commit: r357002 - in head: share/man/man4 sys/conf sys/kern sys/modules/cpufreq sys/sys sys/x86/cpufreq To: Ravi Pokala Cc: src-committers , svn-src-all , svn-src-head Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 483Y8m4WFrz43dD X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-6.00 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; REPLY(-4.00)[]; TAGGED_FROM(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jan 2020 20:02:32 -0000 (I had to look that up.) Yeah, they're different. Speedstep is est(4), the ~15-year old predecessor to Speedshift. They serve similar purposes but purportedly (and plausibly) Speedshift does a better job; also SpeedStep is maybe going away entirely in newer CPUs. Current gens like Skylake and Kabylake have silicon for both, but if intel_hwpstate(4) is enabled, est(4) doesn't work; hence the kludge in est(4) to avoid "identifying" if intel_hwpstate(4) successfully identified (wasn't disabled && new enough CPU). Best, Conrad On Thu, Jan 23, 2020 at 12:55 AM Ravi Pokala wrote: > > -----Original Message----- > From: on behalf of Conrad Meyer > Date: 2020-01-22, Wednesday at 15:28 > To: , , > Subject: svn commit: r357002 - in head: share/man/man4 sys/conf sys/kern sys/modules/cpufreq sys/sys sys/x86/cpufreq > > Author: cem > Date: Wed Jan 22 23:28:42 2020 > New Revision: 357002 > URL: https://svnweb.freebsd.org/changeset/base/357002 > > Log: > cpufreq(4): Add support for Intel Speed Shift > > Intel Speed Shift is Intel's technology to control frequency in hardware, > with hints from software. > > Not to be confused with Intel Speed *Step*, right? > > (/me was confused; naming things is hard) > > -Ravi (rpokala@) > > Let's get a working version of this in the tree and we can refine it from > here. > > Submitted by: bwidawsk, scottph > Reviewed by: bcr (manpages), myself > Discussed with: jhb, kib (earlier versions) > With feedback from: Greg V, gallatin, freebsdnewbie AT freenet.de > Relnotes: yes > Differential Revision: https://reviews.freebsd.org/D18028 > > >