From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [ACPI] [PATCH] i386 No Idle HZ aka dynticks v051205 Date: Mon, 5 Dec 2005 22:34:46 +0100 Message-ID: <20051205213446.GA4388@elf.ucw.cz> References: <200512051154.45500.kernel@kolivas.org> <20051205211602.GB1728@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20051205211602.GB1728@elf.ucw.cz> Sender: linux-kernel-owner@vger.kernel.org To: Con Kolivas Cc: linux list , ck list , Dominik Brodowski , Tony Lindgren , vatsa@in.ibm.com, Daniel Petrini , acpi-devel@lists.sourceforge.net List-Id: linux-acpi@vger.kernel.org Hi! > > The main change to this version is the inclusion of Dominik's patches to > > cpufreq ondemand, acpi c-states and bus mastering which should start making > > the potential power saving features of dyntick a reality (thanks!). > > One buildfix for !CONFIG_NO_IDLE_HZ as well. > > > > If you get strange stalls with this patch then almost certainly it is a > > problem with dynticks and your apic so booting with the "noapic" option > > should fix it. > > > > Split out patches, timertop and pmstats utilities and latest patch available > > here: > > http://ck.kolivas.org/patches/dyn-ticks/ > > > > FAQ: > > What Hz should I use with dynticks in the config? > > 1000 to realise the benefits of the power saving features and low latency. > > > > Should I enable timer statistics? > > Only if you're planning on using the timertop utility to help you recognise > > the biggest sources of timers currently in use to help you improve power > > savings. > > Strange. It works okay here (thinkpad x32, configured SMP), but > something strange is going on with cursor. I use softcursor (normal > underline but highlight background), and underline no longer blinks > over it. > > Try: > > echo -e "\33[10;5000]\33[11;50]\33[?18;0;136c\33[?102m" > > on vanilla and no-idle-hz kernels to see what I mean. I'm using > framebuffer console here. Ok, so the problem is in -rc5 mainline, not in dynticks... Perhaps it is time to get dynticks merged to -mm tree? Pavel -- Thanks, Sharp!