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Re: BogoMIPS

To: Greg Weeks <greg.weeks@timesys.com>
Subject: Re: BogoMIPS
From: Stuart Longland <stuartl@longlandclan.hopto.org>
Date: Wed, 13 Apr 2005 14:19:11 +1000
Cc: linux-mips@linux-mips.org
In-reply-to: <425BDCE4.6070708@timesys.com>
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Greg Weeks wrote:
Has anyone else noticed BogoMIPS is zero? Are we not doing the calibrate
delay?

Greg Weeks

-bash-2.05b# cat /proc/cpuinfo
system type             : MIPS Malta
processor               : 0
cpu model               : MIPS 4Kc V0.1
BogoMIPS                : 0.00
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 16
extra interrupt vector  : yes
hardware watchpoint     : yes
VCED exceptions         : not available
VCEI exceptions         : not available
-


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

The more surprising it is that BogoMIPS have become a benchmark for
> performance as important as extra inches in spam email.  Having been
> a permanent annoynce over the years due to miss-interpretation by
> users and due to excessive output on multiprocessor machines Linux
> by default will no longer print the BogoMIPS number since 2.6.9-rc2.
-- <http://www.linux-mips.org/wiki/index.php/BogoMIPS>

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 mips64 
R10000 V2.5  FPU V0.0 SGI Indigo2 GNU/Linux
stuartl@indigo ~ $ cat /proc/cpuinfo
system type             : SGI Indigo2
processor               : 0
cpu model               : R10000 V2.5  FPU V0.0
BogoMIPS                : 193.53
wait instruction        : no
microsecond timers      : yes
tlb_entries             : 64
extra interrupt vector  : no
hardware watchpoint     : yes
VCED exceptions         : not available
VCEI exceptions         : not available
stuartl@indigo ~ $

So honestly, I don't know what's happening with BogoMIPS. :-)  What I do
know however, it isn't worth a cracker in terms of benchmarking value. ;-)

--
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