The situation with Android is ridiculous. I have HTC Desire and this is my first and probably last Android phone(unless the situation changes). It's rooted and running oxygen rom. I like it now, but I'm not going to buy a new one unless the manufacturer guarantees that they will support it atleast 2 years. These phones are so full of proprietary crap(graphics,radio,camera) that the rom-community have very hard time dealing with these things.
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ARM On Ubuntu 12.04 LTS Battling Intel x86?
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Originally posted by Milli View PostVery interesting. This basically nullifies this review.
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Originally posted by WillyThePimp View PostDoes it? I re-read the review and it doesn't say NEON was used for the PandaBoard (i doubt Ubuntu for ARM comes in default with it, not everyone has NEON implemented on metal, i.e Tegra 2) , so things are pretty much equal, and we should expect equal speed-ups for everyone if SIMD was used.
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Originally posted by WillyThePimp View PostDoes it? I re-read the review and it doesn't say NEON was used for the PandaBoard (i doubt Ubuntu for ARM comes in default with it, not everyone has NEON implemented on metal, i.e Tegra 2) , so things are pretty much equal, and we should expect equal speed-ups for everyone if SIMD was used.
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Originally posted by atom01 View PostJust found it. Atom & Ubuntu x64
http://openbenchmarking.org/result/1...AR-A1082013582
I saw a gain of 2.5x(!) on one test, a 2x gain on another one but generally around 40% faster.
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Originally posted by Milli View PostI didn't expect such a big difference on x64. The Atom N450 is one generation newer but basically the same as the N270.
I saw a gain of 2.5x(!) on one test, a 2x gain on another one but generally around 40% faster.
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Originally posted by ldesnogu View PostNot sure it makes sense to compare against Atom 64-bit given that the low power versions (Medfield included) don't have it. Also it seems SSE is not that much faster than x87 according to Agner Fog tables, though I agree it should be used.
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Originally posted by Milli View PostWhy do you say that these two verdors' different SIMD implementations result in the same performance gains? Because they don't and that's why it's important that it's used on both platforms. Intel's implementation is more powerful than ARM's. It's just in a different league. The Atom supports SSE, SSE2, SSE3 and SSSE4 so it's not just SSE.
Also, VFP and NEON are two very elegant SIMD instruction sets. While we cannot claim NEON implementation superiority over SSE(x), doing so the other way is equally wrong, it's a lie. Anyways, the default SSE2 in x86_64 is the first SSE that introduced, as far as I know, double precision formats for integer and fp operations, but VFP, in the other hand, is baseline for every modern ARM core and supports it. Shall we compare SSE vs NEON on 32 bits kernel? I'm pretty sure Atom is gonna keep loosing. ANd this is, with a much more mature support for it's architecture at compiler level, overall better system specs and higher power consumption.
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