linux-kernel - Re: [RFC PATCH] x86:Use cpu_khz for loops_per

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Date:	Tue, 24 Jun 2008 01:47:28 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Alok Kataria <akataria@...are.com>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Daniel Hecht <dhecht@...are.com>, Tim Mann <mann@...are.com>,
	Zach Amsden <zach@...are.com>, Sahil Rihan <srihan@...are.com>
Subject: Re: [RFC PATCH] x86:Use cpu_khz for loops_per_jiffy calculation


* Alok Kataria <akataria@...are.com> wrote:

> > but there's another problem as well: why are generic files 
> > (init/calibrate.c and include/linux/delay.h) using something that is 
> > named in an x86-specific way - lpj_tsc ? (TSC is an x86 concept)
> 
> calibrate_delay_direct was using some variables with "tsc" as the 
> prefix (tsc_rate_min/max) ...so i thought of using lpj_tsc. And also 
> IMO, lpj_tsc explains how is this variable initialized. But thinking 
> about it, maybe we should rename it to "lpj_timer" ?

ok. But instead of 'lpj_timer' i'd suggest to use something like 
'lpj_fine' - as this really is about finegrained measurements.

I'd suggest a delta patch against tip/master that renames all those 
tsc_* variables to fine_*. So tsc_rate_min would become fine_rate_min, 
etc.

	Ingo
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