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From: devzero@web.de
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Alok Kataria <akataria@vmware.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: Reduce the default HZ value
Date: Tue, 12 May 2009 21:45:31 +0200	[thread overview]
Message-ID: <711906814@web.de> (raw)

>> > As a side note Red Hat ships runtime configurable tick behaviour in RHEL
>> > these days. HZ is fixed but the ticks can be bunched up. That was done as
>> > a quick fix to keep stuff portable but its a lot more sensible than
>> > randomly messing with the HZ value and its not much code either.
>> > 
>> Hi Alan, 
>> 
>> I guess you are talking about the tick_divider patch ? 
>> And that's still same as reducing the HZ value only that it can be done
>> dynamically (boot time), right ? 
>
>Yes - which has the advantage that you can select different behaviours
>rather than distributions having to build with HZ=1000 either for
>compatibility or responsiveness can still allow users to drop to a lower
>HZ value if doing stuff like HPC.
>
>Basically it removes the need to argue about it at build time and lets
>the user decide.

any reason why this did not reach mainline?
is it because there were issues with clocksource=pit ?

regards
roland

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             reply	other threads:[~2009-05-12 19:45 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-12 19:45 devzero [this message]
2009-05-13 23:30 ` [PATCH] x86: Reduce the default HZ value Alok Kataria
  -- strict thread matches above, loose matches on Subject: below --
2009-05-14 20:25 devzero
2009-05-14 20:29 ` Alan Cox
2009-05-04 18:44 Alok Kataria
2009-05-05 21:21 ` H. Peter Anvin
2009-05-05 21:44   ` Alan Cox
2009-05-05 22:09     ` Alok Kataria
2009-05-05 22:33       ` Alan Cox
2009-05-05 23:37         ` Alok Kataria
2009-05-07 14:09         ` Christoph Lameter
2009-05-07 15:12           ` Alan Cox
2009-05-05 21:57   ` Alok Kataria
2009-05-07 14:13     ` Christoph Lameter
2009-05-07 15:14       ` Alan Cox
2009-05-07 15:20         ` Christoph Lameter
2009-05-07 15:30         ` H. Peter Anvin
2009-05-07 15:40           ` Christoph Lameter
2009-05-07 16:55           ` Jeff Garzik
2009-05-07 17:09             ` Alan Cox
2009-05-07 17:55               ` Jeff Garzik
2009-05-07 19:51                 ` Alan Cox
2009-05-07 20:03                   ` Jeff Garzik
2009-05-07 20:30                     ` Alan Cox
2009-05-07 16:37         ` Alok Kataria
2009-05-07 17:07       ` Peter Zijlstra
2009-05-07 17:13         ` Peter Zijlstra
2009-05-07 17:18           ` Peter Zijlstra
2009-05-07 17:20             ` Christoph Lameter
2009-05-07 17:39               ` Peter Zijlstra
2009-05-07 17:40                 ` Christoph Lameter
2009-05-07 17:54               ` Paul E. McKenney
2009-05-07 17:51                 ` Christoph Lameter
2009-05-07 19:51                   ` Paul E. McKenney
2009-05-07 17:36             ` Paul E. McKenney
2009-05-07 17:38               ` Peter Zijlstra
2009-05-07 18:01                 ` Paul E. McKenney
2009-05-07 18:12                   ` Christoph Lameter
2009-05-07 19:06                     ` Paul E. McKenney
2009-05-07 19:53                     ` Alan Cox
2009-05-07 19:56                       ` Christoph Lameter
2009-05-07 20:24                         ` Alan Cox
2009-05-07 20:21                           ` Christoph Lameter
2009-05-08 10:32                   ` Peter Zijlstra
2009-05-08 12:50                     ` Paul E. McKenney
2009-05-08 14:16                       ` Christoph Lameter
2009-05-08 15:06                         ` Paul E. McKenney
2009-05-07 17:18           ` Christoph Lameter
2009-05-07 17:37             ` Peter Zijlstra
2009-05-07 17:34               ` Christoph Lameter
2009-05-07 17:55                 ` Peter Zijlstra
2009-05-07 17:55                   ` Christoph Lameter
2009-05-07 17:19         ` Christoph Lameter
2009-05-07 17:45           ` Peter Zijlstra
2009-05-07 17:50             ` Christoph Lameter
2009-05-07 19:17               ` Peter Zijlstra
2009-05-07 19:38                 ` Christoph Lameter
2009-05-07 21:01             ` H. Peter Anvin
2009-05-07 16:35     ` Chris Snook
2009-05-07 16:56       ` Alok Kataria
2009-05-07 20:29         ` Chris Snook
2009-05-07 20:34           ` Alan Cox
2009-05-07 22:16             ` Ravikiran G Thirumalai
2009-05-07 22:19             ` Alok Kataria
2009-05-08  9:31               ` Alan Cox

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