From owner-freebsd-hackers@freebsd.org Sat Apr 21 19:28:46 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EB163F8BD90 for ; Sat, 21 Apr 2018 19:28:45 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-io0-x235.google.com (mail-io0-x235.google.com [IPv6:2607:f8b0:4001:c06::235]) (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 7BDEA8086C for ; Sat, 21 Apr 2018 19:28:45 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-io0-x235.google.com with SMTP id e78-v6so1529366iod.0 for ; Sat, 21 Apr 2018 12:28:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=c/BhbioWIPxigOg1UmgknbY4OdyKZnieZCiQFmXi6bQ=; b=nWCStLatgqS/Yn1jCJgAX9EcJ1rc/F1IWm9SHzS/5EKXLnIfEu5LNOs9pqtgx0zdWK fUBxTScfCya1iQ4BW/n3fVIUhhGNZA/3Y8TGQkadSGDktupMalVo6oCqXmW2oKSrX3/K JD3Xnn87p3mlQyB9GXEcU/8g+uNrY4SJvU/tjL8N8QZcuS72uSFF2odd0//JJBnNRdZK T1CzyVpC+LD5fkf2a1VcA5pwK4+jjE02szCjG0ohGjRpVtpysXEzpAB0FnAJ1MvmqKWJ WovzQHA6f4ml/YAsUkaoshxbG7/FxiP0I4xTBJo1fbKpW8Bc24ha98CJ2Ge99T7Wdk3e o6QQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=c/BhbioWIPxigOg1UmgknbY4OdyKZnieZCiQFmXi6bQ=; b=mWQSiFeQVDDbynhW0t0xOA6wP7y5dKmMqPN1i+OlfKjr4npX45HtozoRE3nEe0s/6V ghddoJYWYOJb48uYPlDs8ec88eWjao/87WK2mWe832LY8S2yNjw9bQFypTCBe5eRr5mA uobKxoli9/fSfeCIYZ57hd5heCVpWM4iPGegWCprk1HfNJVZgPuBcAdeOWQ8wMz6Ukoa 4jsyejPuetXLijBfi0kHnAHj3HsXNo8IIpBX+b73cXVDrys9CaBzUy4Vzq/ocBipKVd2 KrUOICqTYGO2RyFq/q0LZoeD/eIpsIMXMi995tXi4b5GqOtnShd3j67zWfS9ClNAfSRb EA9A== X-Gm-Message-State: ALQs6tAIbXOHOMdj3AptiU0dljhOouCdYue/NqUJJ3q4TI+bG83YJgdb D7vUNi0ScdxkRZit8Rn7V9qXDQt5FaX0JLZhZ2V6VQ== X-Google-Smtp-Source: AB8JxZo4gh2dq3Yjug1gQPV6OBew2Jf89vwzqOMtvlL7ZfFTzYgw5cAyoXzqK2a/uI336HVdEnKDj4/WYXosYmTu00c= X-Received: by 2002:a6b:a292:: with SMTP id l140-v6mr15176316ioe.39.1524338924834; Sat, 21 Apr 2018 12:28:44 -0700 (PDT) MIME-Version: 1.0 Sender: wlosh@bsdimp.com Received: by 2002:a4f:a604:0:0:0:0:0 with HTTP; Sat, 21 Apr 2018 12:28:44 -0700 (PDT) X-Originating-IP: [2603:300b:6:5100:1052:acc7:f9de:2b6d] In-Reply-To: <4be440e4-e70f-3652-e755-ed2d924ff3d2@freebsd.org> References: <01000162df15f856-1e5d2641-2a72-4250-8d8e-adcd47bc5db4-000000@email.amazonses.com> <4be440e4-e70f-3652-e755-ed2d924ff3d2@freebsd.org> From: Warner Losh Date: Sat, 21 Apr 2018 13:28:44 -0600 X-Google-Sender-Auth: xvEbVQku_hVv78uSOclThznbU9c Message-ID: Subject: Re: RFC: Hiding per-CPU kernel output behind bootverbose To: Julian Elischer Cc: "freebsd-hackers@freebsd.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Apr 2018 19:28:46 -0000 On Fri, Apr 20, 2018 at 12:11 AM, Julian Elischer wrote: > On 20/4/18 4:48 am, Steven Hartland wrote: > >> Sounds good to me, I think we could actually benefit from even quieter >> modes if I=E2=80=99m honest. >> >> On Thu, 19 Apr 2018 at 21:09, Colin Percival >> wrote: >> >> On large systems (e.g., EC2's x1e.32xlarge instance type, with 128 vCPUs= ) >>> the boot time console output contains a large number of lines of the >>> forms >>> >>> SMP: AP CPU #N Launched! >>> cpuN: on acpi0 >>> estN: on cpuN >>> >>> Having 128 almost-identical lines of output doesn't seem very useful, a= nd >>> it actually has a nontrivial impact on the time spent booting. >>> >>> Does anyone mind if I hide these by default, having them only show up i= f >>> boot verbosity is requested? >>> >> https://reviews.freebsd.org/D15153 implements that for everything except the CPU launched. Warner