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From: Bill Davidsen <davidsen@tmr.com>
To: Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Cc: Pavel Machek <pavel@ucw.cz>,
	"Martin J. Bligh" <mbligh@aracnet.com>,
	Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Increasing HZ (patch for HZ > 1000)
Date: Sat, 03 Jan 2004 13:16:17 -0500	[thread overview]
Message-ID: <3FF706F1.1030508@tmr.com> (raw)
In-Reply-To: <1071269429.4182.6.camel@idefix.homelinux.org>

Jean-Marc Valin wrote:

> Actually, the way I rewrote it in the patch is immune to that kind of
> problem:
> 
> seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
>            HZ*(c->loops_per_jiffy>>3)/62500,
>            (HZ*(c->loops_per_jiffy>>3)/625)%100);
> 
> It will work correctly for any HZ up to ~34000 bogomips (using 32-bit
> arithmetic).

I think it's likely any CPU with 34000 bogomips will have more than 32 
bit ;-)

-- 
bill davidsen <davidsen@tmr.com>
   CTO TMR Associates, Inc
   Doing interesting things with small computers since 1979

  reply	other threads:[~2004-01-03 18:16 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-11  6:05 Increasing HZ (patch for HZ > 1000) Jean-Marc Valin
2003-12-11  7:07 ` Martin J. Bligh
2003-12-11  7:15   ` Jean-Marc Valin
2003-12-11  7:18     ` Martin J. Bligh
2003-12-11 17:18       ` Gene Heskett
2003-12-11 17:33         ` Martin J. Bligh
2003-12-11 18:10           ` Richard B. Johnson
2003-12-11 19:14             ` Gene Heskett
2003-12-11 18:35           ` Gene Heskett
2003-12-12 22:08       ` Pavel Machek
2003-12-12 22:57         ` Jean-Marc Valin
2003-12-12 23:18           ` Måns Rullgård
2003-12-12 23:40           ` Pavel Machek
2003-12-13  2:25             ` Måns Rullgård
2003-12-16  3:04             ` john stultz
2003-12-16  5:20               ` Mitchell Blank Jr
2003-12-14  1:05           ` bill davidsen
2003-12-14  4:48             ` Pat Erley
2003-12-11  7:30     ` Nick Piggin
2003-12-11  8:25     ` Tim Schmielau
2003-12-12  8:00   ` Jean-Marc Valin
2003-12-12 22:10     ` Pavel Machek
2003-12-12 22:50       ` Jean-Marc Valin
2004-01-03 18:16         ` Bill Davidsen [this message]
     [not found]         ` <010f01c415a4_27033d00_d100000a@sbs2003.local>
2004-04-06 13:00           ` Pavel Machek
2003-12-11 19:22 Grover, Andrew
2003-12-12 22:31 ` Jamie Lokier
2003-12-12 22:58   ` Vojtech Pavlik
2003-12-12 23:45     ` Jamie Lokier
2003-12-13  8:36       ` Vojtech Pavlik
2003-12-12 15:52 Vincent Legoll

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