ARM现在还缺乏64Bit支持，不过这个很快就会有的。Intel已经很有鸭梨了。对于消费者而言，一个有竞争的市场才会是一个更良性的市场


2010/11/11 Kula <kulasama在gmail.com>

> 我记得p4的功耗就有130w..
> 也就是说40个核的arm功耗和p4差不多.
> arm在服务器领域会很有前途吧..
>
> 2010/11/11 Samuel <yellowbug在gmail.com>
>
> 不要轻易认为自己想的是不合理的，你想的这事已经有人干出来了
>>
>> Marvell Armada XP 四核1.6G的SoC，功耗不超过10W，铁定就是奔着云计算去的
>>
>> http://www.pcworld.com/businesscenter/article/210156/marvells_armada_xp_could_bring_a_cloud_revolution.html
>>
>>
>> Chip maker Marvell has announced a new enterprise-class server chip<http://www.pcworld.com/article/210069/arm_faces_uphill_battle_in_server_market.html>:
>> the Armada XP. This is an ARM architecture chip<http://www.pcworld.com/article/171171/the_11_most_influential_microprocessors_of_all_time.html>,
>> very similar to those found in the majority of handheld computing devices at
>> the moment--everything from iPhones to Kindle eBook readers.
>> As you might expect, the Armada XP is more powerful<http://www.pcworld.com/businesscenter/article/210013/marvell_nudges_arm_into_server_market.html>than the chips found in those humble devices. It contains four cores running
>> at 1.6GHz and is a system-on-a-chip, meaning that there's no need for
>> additional chipset hardware to take care of interfacing with the likes of
>> storage or memory devices.
>>
>> The XP stands for "Extreme Performance" although its name is, viewed from
>> every angle, a stupid choice. Anybody with any knowledge will think of AMD's
>> old Athlon XP chips, or Microsoft's hoary, bewhiskered operating system.
>>
>> That aside, the Armada XP is an intriguing new product. Its chief selling
>> point is that it consumes very little power compared to competitors from
>> Intel or AMD. Lower power is not only environmentally friendly but also
>> means less heat is produced, potentially making these chips easier to work
>> with from a practical viewpoint. When you realize data centers need
>> extraordinary amounts of expensive air conditioning, you can see why this is
>> good.
>>
>> Will we be seeing Armada XP-based systems anytime soon? It's unlikely.
>> Marvell is trying to carve out a new niche in a market that has
>> traditionally been dominated by x86 and PowerPC architectures. The biggest
>> issue facing take-up will be software<http://www.pcworld.com/article/172069/arm_flaunts_performance_by_boosting_processor_speed.html>:
>> You're not going to be able to run any Microsoft enterprise-level products
>> on this chip because of its ARM architecture (although there have been
>> rumors that Microsoft is sniffing around ARM for its server products).
>> However, as you might expect, open source is already on the scene<http://www.arm.com/community/software-enablement/linux.php>,
>> and has been for some time.
>>
>> However, Marvell has its eye on a different market: cloud computing<http://www.pcworld.com/article/203965/arms_next_chip_design_to_support_virtualization.html>.
>> This is still a nascent area, and providers are struggling to determine the
>> best ways of making optimal use of hardware. Unlike much of the computing
>> industry, the cloud isn't an area owned by x86.
>>
>> There's much talk about performance-per-watt, meaning the amount of
>> computing power that can be gained per dollar spent. The ARM architecture is
>> a serious contender here, even if it does tend to be slower than equivalent
>> Intel or AMD products. The Armada XP weighs in at less than 10 watts--around
>> one tenth the power taken by the average light bulb. Add in less need for
>> expensive air conditioning in server farms, and even the most ardent x86 fan
>> will raise an eyebrow.
>>
>> Although we can expect to see some curio products here and there based on
>> the Armada XP, such as home media servers or NAS devices<http://www.pcworld.com/businesscenter/article/209679/networkattached_storage_how_to_pick_nas_for_any_business.html>,
>> it simply isn't a serious contender right now in the server space. It has
>> some serious technical limitations, such as being only 32-bit, but it
>> signifies Marvell (and, by extension, ARM) is assembling a legion that will
>> fight in the great cloud battle that's about to commence. Its soldiers might
>> not be as legion as the likes of Intel, but they have specific skills that
>> are ideal for this kind of battle.
>>
>> The net result will undoubtedly be cheaper computing resources--not only
>> because of potentially cheaper performance-per-watt figures, but also from
>> the serious competition that Intel and AMD face now face.
>>
>> It might even be the case one day that x86 is sandwiched between ARM in
>> the marketplace--there'll be ARM on mobile devices and ARM in the cloud,
>> leaving x86 in the middle<http://www.pcworld.com/article/160727/nvidia_mulls_x86_chip_for_lowcost_computers.html>to run desktop and notebook computers and modest server setups.
>>
>>
>>
>> 2010/11/11 <khufu在139.com>
>>
>>>  好像x86是不合理的，不好的。但是除了x86，没有那么大运算能力。
>>>
>>> 那么这样岂不很好？做个上网本，上面装个十来个arm的cpu，或者三十来个，这样性能够高，又功率低。
>>>
>>> 只是这样需要程序多线程就可以了。现在网页这样复杂，做成多线程很合理吧，一个用于跑javascript，一个解析html，一个做渲染，一个管UI，并且tab
>>> browse的时候每个页面都分成上面几种，线程一下子就可以做几十个出来，就可以用这种多CPU的东西了。
>>>
>>> 一点外行的旁观想法。请听了的人别笑，要是我说错了，认真地说明为什么错了。
>>>
>>>
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>>
>>
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