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
next prev parent 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
-- strict thread matches above, loose matches on Subject: below --
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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