From: Thomas Gleixner <tglx@linutronix.de>
To: Andreas Mohr <andi@rhlx01.hs-esslingen.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <ak@suse.de>, Arjan van de Ven <arjan@infradead.org>,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Chris Wright <chrisw@sous-sol.org>,
john stultz <johnstul@us.ibm.com>
Subject: Re: [patch-mm 07/23] Tick management: spread timer interrupt
Date: Sun, 10 Jun 2007 16:31:03 +0200 [thread overview]
Message-ID: <1181485863.384.15.camel@chaos> (raw)
In-Reply-To: <20070610141617.GA15173@rhlx01.hs-esslingen.de>
On Sun, 2007-06-10 at 16:16 +0200, Andreas Mohr wrote:
> Hi,
>
> On Sun, Jun 10, 2007 at 09:44:05AM -0000, Thomas Gleixner wrote:
> > From: john stultz <johnstul@us.ibm.com>
> >
> > After discussing w/ Thomas over IRC, it seems the issue is the sched
> > tick fires on every cpu at the same time, causing extra lock contention.
>
> Hmm, the cpu-specific offset calculation isn't too expensive, hopefully?
> (div/mul in patch, maybe this could be done differently)
That's one time during setup, no hot path.
tglx
next prev parent reply other threads:[~2007-06-10 14:31 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-10 9:43 [patch-mm 00/23] High resolution timer updates and x86_64 support Thomas Gleixner
2007-06-10 9:43 ` [patch-mm 01/23] NOHZ: Fix ARM,SH,SPARC64 idle nohz handling Thomas Gleixner
2007-06-11 0:26 ` Paul Mundt
2007-06-11 5:20 ` Thomas Gleixner
2007-06-11 5:32 ` Paul Mundt
2007-06-10 9:44 ` [patch-mm 02/23] ACPI: Move timer broadcast and pmtimer access before C3 arbiter shutdown Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 03/23] Clockevents remove prototypes of removed functions Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 04/23] Timekeeping: Fixup shadow variable argument Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 05/23] timer.c cleanup recently introduced whitespace damage Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 06/23] clockevents: Fix resume logic Thomas Gleixner
2007-06-10 9:43 ` Nigel Cunningham
2007-06-10 9:51 ` Thomas Gleixner
2007-06-10 10:19 ` Rafael J. Wysocki
2007-06-10 10:30 ` Thomas Gleixner
2007-06-10 10:58 ` Rafael J. Wysocki
2007-06-10 13:17 ` Thomas Gleixner
2007-06-10 16:34 ` Rafael J. Wysocki
2007-06-10 18:45 ` Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 07/23] Tick management: spread timer interrupt Thomas Gleixner
2007-06-10 14:16 ` Andreas Mohr
2007-06-10 14:31 ` Thomas Gleixner [this message]
2007-06-10 14:35 ` Andreas Mohr
2007-06-10 9:44 ` [patch-mm 08/23] i386: PIT stop only, when in periodic or oneshot mode Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 09/23] clockevents: Fix device replacement Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 10/23] highres: Improve debug output Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 11/23] hrtimer: speedup hrtimer_enqueue Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 12/23] pcspkr: use the global PIT lock Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 13/23] i386: hpet assumes boot cpu is 0 Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 14/23] NTP: Move the cmos update code into ntp.c Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 15/23] x86_64: untangle asm/hpet.h from asm/timex.h Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 16/23] x86_64: Use generic cmos update Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 17/23] i386: move setup_pit_timer to the correct header file Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 18/23] x86-64: remove dead code and other janitor work in tsc.c Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 19/23] x86_64: Convert to cleckevents Thomas Gleixner
2007-06-11 8:47 ` Sébastien Dugué
2007-06-11 8:57 ` Thomas Gleixner
2007-06-11 19:12 ` [patch-mm 19a/23] x86_64: hpet restore vread Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 20/23] x86_64: restore restore nohpet cmdline Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 21/23] x86-64 block irq balancing for timer Thomas Gleixner
2007-06-10 16:29 ` Arjan van de Ven
2007-06-11 19:24 ` Pallipadi, Venkatesh
2007-06-10 9:44 ` [patch-mm 22/23] x86_64: prep idle loop for dynticks Thomas Gleixner
2007-06-10 9:44 ` [patch-mm 23/23] x86_64: enable high resolution timers and dynticks Thomas Gleixner
2007-06-10 22:46 ` [patch-mm 00/23] High resolution timer updates and x86_64 support Mark Lord
2007-06-11 5:19 ` Thomas Gleixner
2007-06-11 22:43 ` Mark Lord
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