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Re: BogoMIPS

To: Stuart Longland <>
Subject: Re: BogoMIPS
From: Ralf Baechle <>
Date: Wed, 13 Apr 2005 13:47:12 +0100
Cc: Greg Weeks <>,
In-reply-to: <>
Original-recipient: rfc822;
References: <> <>
User-agent: Mutt/1.4.1i
On Wed, Apr 13, 2005 at 02:19:11PM +1000, Stuart Longland wrote:

> Probably, because it's no longer relevant these days.  It doesn't say
> anything special.

Nonsense.  It's just not printed to the screen by default.

> Interestingly, my IP28 still shows the BogoMIPS reading in /proc/cpuinfo:
> >stuartl@indigo ~ $ uname -a
> >Linux indigo 2.6.10-mipscvs-20050115-ip28 #2 Sun Apr 3 08:24:18 EST 2005 

Because you're running a vintage kernel.  The 0 BogoMIPS bug was
introduced by this CVS change:

  revision 1.54
  date: 2005/02/21 21:34:24;  author: ralf;  state: Exp;  lines: +2 -2
  On multiprocessor systems the BogoMIPS for each CPU was reported was
  the value for the last CPU having calibrated it's delay loop.

Only the value shown in /proc/cpuinfo on UP kernel was affected, so the
effect should be purely psychologic - I know what negative impact low
BogoMIPS may have on some people ;-)


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