From owner-freebsd-current@freebsd.org Tue Dec 8 20:52:17 2015 Return-Path: Delivered-To: freebsd-current@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 0E0C99D587F for ; Tue, 8 Dec 2015 20:52:17 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from esa-jnhn.mail.uoguelph.ca (esa-jnhn.mail.uoguelph.ca [131.104.91.44]) by mx1.freebsd.org (Postfix) with ESMTP id A9ADF1031; Tue, 8 Dec 2015 20:52:16 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) IronPort-PHdr: 9a23:vWl8PRfao40pWrAI0c8MaVEAlGMj4u6mDksu8pMizoh2WeGdxc68YR7h7PlgxGXEQZ/co6odzbGG7ea4ASQp2tWojjMrSNR0TRgLiMEbzUQLIfWuLgnFFsPsdDEwB89YVVVorDmROElRH9viNRWJ+iXhpQAbFhi3DwdpPOO9QteU1JTpkbjqs7ToICx2xxOFKYtoKxu3qQiD/uI3uqBFbpgL9x3Sv3FTcP5Xz247bXianhL7+9vitMU7q3cYk7sb+sVBSaT3ebgjBfwdVWx+cjN92Mq+lx7DS0Ol738QTWQQ2k5KAwLt4gv3U53qvm39rOUriweAOsijd7E/WnyH5qxoTBLtwHMdMjcy82Xaj+Rti61GrRa5p1p0ytiHM8muKPNic/aFLpshTm1bU5MUDnQZDw== X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2DTAQCGQmdW/61jaINehQG9OQENgW6CXl6CUgKBdxQBAQEBAQEBAYEJgi2CCAEBBCNWEAIBCA4KAgINGQICVwIELogUrk6QZQEBAQEBAQEBAQEBAQEBAQEBARuBAYVThH2EPoM5gUQFjh+IQo8XhEOWTQIfAQFChCIghRyBBwEBAQ X-IronPort-AV: E=Sophos;i="5.20,400,1444708800"; d="scan'208";a="254954971" Received: from nipigon.cs.uoguelph.ca (HELO zcs1.mail.uoguelph.ca) ([131.104.99.173]) by esa-jnhn.mail.uoguelph.ca with ESMTP; 08 Dec 2015 15:52:09 -0500 Received: from localhost (localhost [127.0.0.1]) by zcs1.mail.uoguelph.ca (Postfix) with ESMTP id BA7F415F571; Tue, 8 Dec 2015 15:52:09 -0500 (EST) Received: from zcs1.mail.uoguelph.ca ([127.0.0.1]) by localhost (zcs1.mail.uoguelph.ca [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id TTZZ_nBhrCEc; Tue, 8 Dec 2015 15:52:09 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by zcs1.mail.uoguelph.ca (Postfix) with ESMTP id 6A3DF15F574; Tue, 8 Dec 2015 15:52:09 -0500 (EST) X-Virus-Scanned: amavisd-new at zcs1.mail.uoguelph.ca Received: from zcs1.mail.uoguelph.ca ([127.0.0.1]) by localhost (zcs1.mail.uoguelph.ca [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id m2xZpKUcdr6S; Tue, 8 Dec 2015 15:52:09 -0500 (EST) Received: from zcs1.mail.uoguelph.ca (zcs1.mail.uoguelph.ca [172.17.95.18]) by zcs1.mail.uoguelph.ca (Postfix) with ESMTP id 5102115F571; Tue, 8 Dec 2015 15:52:09 -0500 (EST) Date: Tue, 8 Dec 2015 15:52:08 -0500 (EST) From: Rick Macklem To: John Baldwin Cc: freebsd-current@freebsd.org, Adrian Chadd , Alexander Kabaev Message-ID: <1448756984.124315914.1449607928797.JavaMail.zimbra@uoguelph.ca> In-Reply-To: <1558819.MnyjzOdus5@ralph.baldwin.cx> References: <900422043.121631608.1449496955386.JavaMail.zimbra@uoguelph.ca> <387840531.122544462.1449529268528.JavaMail.zimbra@uoguelph.ca> <1558819.MnyjzOdus5@ralph.baldwin.cx> Subject: Re: slow screen updates on laptop console (i386) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [172.17.95.12] X-Mailer: Zimbra 8.0.9_GA_6191 (ZimbraWebClient - FF42 (Win)/8.0.9_GA_6191) Thread-Topic: slow screen updates on laptop console (i386) Thread-Index: OJpIEDEsGBhMt1/7khShMaECrN2+SA== X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Dec 2015 20:52:17 -0000 John Baldwin wrote: > On Monday, December 07, 2015 06:01:08 PM Rick Macklem wrote: > > Adrian Chadd wrote: > > > Hi, > > > > > > ok. please file a bug for that. It may be something to do with the > > > hardware and sleep states and skipping wakeups/interrupts or > > > something. > > > > > > Please try using the default again (LAPIC?) and set > > > kern.eventtimer.periodic=1. See if that fixes it. > > > > > Actually made it worse. Instead of being intermittently slow, it was > > almost constantly slow. > > Try disabling C-states if they are enabled. If you have a BIOS option > for C1E you might need to disable that as well. If this fixes it, then > there isn't a really viable solution in software, and you might prefer > to use the RTC to get the power savings from C-states. > Well, if the above refers to stuff that would be in the BIOS setup, there isn't anything. Nothing setable w.r.t. the processor and there isn't much of anything under power savings either (a couple of auto-boot options). - It's a single core i386 Celeron about 8 years old. (On the other hand, if these C states are something the FreeBSD kernel sets, then I don't know how it's done;-) Btw, I'm perfectly happy running it with RTC. It was Adrian that was interested in investigating it more. Thanks, rick > -- > John Baldwin >