linux-kernel - Re: [RFC] [PATCH] allow low HZ values?

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Message-ID: <alpine.LFD.2.00.1010120032060.2909@localhost6.localdomain6>
Date:	Tue, 12 Oct 2010 00:33:08 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
cc:	Tim Pepper <lnxninja@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Marcio Saito <marcio@...lades.com>,
	Jiri Slaby <jirislaby@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org, John Stultz <johnstul@...ibm.com>,
	Avantika Mathur <mathur@...ux.vnet.ibm.com>
Subject: Re: [RFC] [PATCH] allow low HZ values?

On Tue, 12 Oct 2010, Benjamin Herrenschmidt wrote:

> On Mon, 2010-10-11 at 13:11 -0700, Tim Pepper wrote:
> > I'm not necessarily wanting to open up the age old question of "what is
> > a good HZ", but we were doing some testing on timer tick overheads for
> > HPC applications and this came up...
> 
> Note that this is also very useful when working on CPU prototypes
> implemented in FPGAs and running at something like 12Mhz :-)

/me hands benh 0.5$ for a FPGA upgrade
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