From: David Frascone <dave@frascone.com>
To: Greg Weeks <greg.weeks@timesys.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Bogomips?
Date: Wed, 6 Apr 2005 14:29:47 -0500 [thread overview]
Message-ID: <20050406142947.75e360ec@greenlantern.frascone.com> (raw)
In-Reply-To: <4253E9CB.20009@timesys.com>
That nailed it (branch prediction)!
------------------------------------------------
# cat /proc/cpuinfo
cpu : e500
revision : 2.0 (pvr 8020 0020)
bogomips : 665.19
Vendor : Motorola SPS
Machine : mpc8540ads
bus freq : 666.666660 MHz
PVR : 0x80200020
SVR : 0x80300020
PLL setting : 0x4
Memory : 512 MB
------------------------------------------------
Thanks!
-Dave
On Wed, 06 Apr 2005 09:53:15 -0400
Greg Weeks <greg.weeks@timesys.com> wrote:
> David Frascone wrote:
>
> >Can this be right? I'm getting This from a MPC-8260 (/proc/cpuinfo):
> >
> >------------------------------------------------
> >cpu : 82xx
> >core clock : 199 MHz
> >CPM clock : 133 MHz
> >bus clock : 33 MHz
> >revision : 1.1 (pvr 0081 0101)
> >bogomips : 133.12
> >------------------------------------------------
> >
> >And this from a MPC-8540
> >------------------------------------------------
> >cpu : e500
> >revision : 2.0 (pvr 8020 0020)
> >bogomips : 190.05
> >Vendor : Motorola SPS
> >Machine : mpc8540ads
> >bus freq : 666.666660 MHz
> >PVR : 0x80200020
> >SVR : 0x80300020
> >PLL setting : 0x4
> >Memory : 512 MB
> >------------------------------------------------
> >
> >
> >The second one looks way low . . . any ideas?
> >
> >
> Do you have cache turned on? Do you have branch prediction turned on?
> Branch prediction would be my guess as it's easy to miss.
>
> Greg Weeks
>
--
David Frascone
Closed Hearing for the Caption Impaired...
next prev parent reply other threads:[~2005-04-06 19:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 13:12 Bogomips? David Frascone
2005-04-06 13:53 ` Bogomips? Greg Weeks
2005-04-06 19:29 ` David Frascone [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-04-06 13:53 Bogomips? Rune Torgersen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050406142947.75e360ec@greenlantern.frascone.com \
--to=dave@frascone.com \
--cc=greg.weeks@timesys.com \
--cc=linuxppc-dev@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).