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List Archive: gentoo-ppc-dev
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To: Pieter Van den Abeele <pvdabeel@g.o>
From: IsoH <jd@...>
Subject: Re: G5 & missing performance
Date: Fri, 11 Jun 2004 09:38:01 +0300 (EEST)
On Thu, 10 Jun 2004, Pieter Van den Abeele wrote:

> is /proc/cpufreq useable on a G5?

  Perhaps not, but all I now is that missing performance...

  I have very simple test for that; I first boot with mac-boot+ppc64-livecd
  and bzipping (bzip -9) test file, which takes 8.8 seconds to compress.
  Then I boot with yaboot from /dev/sda and repeating same bzipping and
  now it takes about 12.6 seconds.
  btw. with ppc32 same test takes about 7.1 seconds.

  I found out this phenomenon couple months ago when I played
  with OSX and ppc32-gentoo. I think that mac-boot initializes
  something which has same efect when you "turn on full performance"
  on OSX.

> 
> The only thing I see on a G5 is /proc/cpuinfo, which displays:
> 
> pvdabeel@Dual-G5 proc $ cat cpuinfo
> processor       : 0
> cpu             : PPC970, altivec supported
> clock           : 1800MHz
> revision        : 2.2 (pvr 0039 0202)
> bogomips        : 1200.12
> 
> processor       : 1
> cpu             : PPC970, altivec supported
> clock           : 1800MHz
> revision        : 2.2 (pvr 0039 0202)
> bogomips        : 1200.12
> 
> total bogomips  : 2400.25
> machine         : PowerMac7,2
> motherboard     : PowerMac7,2 MacRISC4 Power Macintosh
> detected as     : 336 (PowerMac G5)
> pmac flags      : 00000000
> L2 cache        : 512K unified
> memory          : 0MB
> pmac-generation : NewWorld
> 
> On 10 Jun 2004, at 21:30, IsoH wrote:
> 
> >
> >  I've noticed that there is no /proc/cpufreq anymore
> >  (this is 2.6.7-rc2), so how do I suppose to give a command:
> >     echo "x:yyyy:zzzz:performance" > /proc/cpufreq
> >
> >  ???
> >
> >  It is obvious that about 25-35% performance is missing;
> >  it is possible to gain this back if I boot by mac-boot & livecd,
> >  but I want to boot from /dev/sda now with full performance...
> >
> >
> > IsoH
> >
> 

-- 

IsoH



--
gentoo-ppc-dev@g.o mailing list

Replies:
Re: G5 & missing performance
-- Tom Gall
Re: G5 & missing performance
-- IsoH
Re: G5 & missing performance
-- Luca Barbato
References:
Re: G5 & missing performance
-- Pieter Van den Abeele
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Updated Jun 17, 2009

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