linux-kernel - Re: [PATCH] x86: Reduce the default HZ value

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Date:	Thu, 07 May 2009 15:19:44 -0700
From:	Alok Kataria <akataria@...are.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Chris Snook <chris.snook@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	the arch/x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: Reduce the default HZ value


On Thu, 2009-05-07 at 13:34 -0700, Alan Cox wrote:
> > >> Given your use case, what you really need to do is get Red Hat,
> > >> Novell, et al. on the phone and ask them to ship kernels with HZ=100,
> > >> because the distributions do their own thing anyway.
> 
> 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 ? 

Thanks,
Alok

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