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On Fri, 11 Jun 2004, IsoH wrote: |
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> On Thu, 10 Jun 2004, Pieter Van den Abeele wrote: |
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> |
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> > is /proc/cpufreq useable on a G5? |
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> |
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> Perhaps not, but all I now is that missing performance... |
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> |
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> I have very simple test for that; I first boot with mac-boot+ppc64-livecd |
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> and bzipping (bzip -9) test file, which takes 8.8 seconds to compress. |
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> Then I boot with yaboot from /dev/sda and repeating same bzipping and |
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> now it takes about 12.6 seconds. |
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> btw. with ppc32 same test takes about 7.1 seconds. |
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> |
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> I found out this phenomenon couple months ago when I played |
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> with OSX and ppc32-gentoo. I think that mac-boot initializes |
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> something which has same efect when you "turn on full performance" |
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> on OSX. |
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Solved, I think... |
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I set following OF-values: |
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boot-command mac-boot |
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boot-device sd0:2,yaboot |
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then I cold-booted machine and voila previous bzipping time |
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was back, magical stunt?! |
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I still suspect that boot-command value differs anything; |
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perhaps if boot is done from OF console with command |
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"boot"/"mac-boot" then machine is set to lower speed. |
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On the other hand, if boot is done by cold-booting and not |
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interfering boot sequence in any way then machine's processing |
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speed should be ok I think. Have to check that... |
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> |
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> > |
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> > The only thing I see on a G5 is /proc/cpuinfo, which displays: |
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> > |
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> > pvdabeel@Dual-G5 proc $ cat cpuinfo |
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> > processor : 0 |
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> > cpu : PPC970, altivec supported |
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> > clock : 1800MHz |
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> > revision : 2.2 (pvr 0039 0202) |
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> > bogomips : 1200.12 |
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> > |
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> > processor : 1 |
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> > cpu : PPC970, altivec supported |
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> > clock : 1800MHz |
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> > revision : 2.2 (pvr 0039 0202) |
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> > bogomips : 1200.12 |
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> > |
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> > total bogomips : 2400.25 |
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> > machine : PowerMac7,2 |
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> > motherboard : PowerMac7,2 MacRISC4 Power Macintosh |
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> > detected as : 336 (PowerMac G5) |
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> > pmac flags : 00000000 |
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> > L2 cache : 512K unified |
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> > memory : 0MB |
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> > pmac-generation : NewWorld |
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Unfare! I dont have those bogomips values... ;) |
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# cat /proc/cpuinfo |
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processor : 0 |
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cpu : PPC970, altivec supported |
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clock : 2000.000000MHz |
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revision : 2.2 |
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processor : 1 |
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cpu : PPC970, altivec supported |
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clock : 2000.000000MHz |
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revision : 2.2 |
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timebase : 33333333 |
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machine : PowerMac7,2 |
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motherboard : PowerMac7,2 MacRISC4 Power Macintosh |
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detected as : 336 (PowerMac G5) |
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pmac flags : 00000000 |
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pmac-generation : NewWorld |
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> |
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> |
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-- |
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IsoH |
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-- |
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