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On Wednesday 31 January 2007 09:58, Alan McKinnon |
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<alan@××××××××××××××××.za> wrote about 'Re: [gentoo-user] |
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Symlinking /usr/portage/distfiles': |
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> On Wednesday 31 January 2007, Bo Ørsted Andresen wrote: |
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> > Furthermore Pentium 4 is a joke (it performs horribly). A 2 GHz |
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> > (Dothan I presume) Pentium-M should be faster than a 2,8 GHz Pentium |
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> > 4. My timing is for an 1,6 GHz (Banias) Pentium-M btw. |
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> |
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> This sounds odd, but I'm not a cpu expert so can't really comment. Care |
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> to elaborate on why the P4 performs so horribly? |
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The instruction pipeline is very long, the CPU <-> RAM bandwith is quite |
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small, and the pipeline has to be emptied any time the branch predictor is |
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wrong. While the pipeline fills, the CPU works but no results are |
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visible. |
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Hz has never been a complete trump of other issues affecting CPU |
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performance, but is always a factor to consider. (Among CPUs that are |
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otherwise identical, higher Hz wins.) |
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-- |
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Boyd Stephen Smith Jr. ,= ,-_-. =. |
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bss03@××××××××××.net ((_/)o o(\_)) |
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ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' |
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http://iguanasuicide.org/ \_/ |
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