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rick merritt
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re: Marvell quad-core ARM targets x86 servers
rick merritt   11/8/2010 9:45:49 PM
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If you are doing something to push ARM into low power servers I'd love to hear about it.

DF0
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re: Marvell quad-core ARM targets x86 servers
DF0   11/9/2010 4:50:56 AM
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Definitely interesting, but it seems problematic that you have four cores that can address only a total of 4GB of memory, e.g. 1GB per core. Might be limiting for a lot of server apps. In practice it might be worse, with the system only able to handle 2-3GB (that's been my experience with 32-bit, non-PAE Linux).

neuraxon77
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re: Marvell quad-core ARM targets x86 servers
neuraxon77   11/9/2010 5:03:33 AM
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Typo: 800 MHz not 8090 MHz. It's also ECC.

pica0
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re: Marvell quad-core ARM targets x86 servers
pica0   11/9/2010 8:47:10 AM
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2 or even 4GB of RAM is sufficiant for many, many server tasks. I think a system based on that SoC is on par with the Pentium III Tualatin quad-processor systems build in 2001-2002. These system also had just 2 or 4 GB of RAM. But nevertheless served well.

bobbytsai
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re: Marvell quad-core ARM targets x86 servers
bobbytsai   11/9/2010 5:18:16 PM
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here are a few more publicly announced Cortex-A licenses: Broadcom , NEC Electronics, NVIDIA, STM, Toshiba, Mindspeed Technologies, Freescale, Matsushita, Samsung, PMC-Sierra, Ziilabs. Why are there no solutions like Tilera's 36 or 64 core products. Are ARM's per core licensing costs too high ? 32 bit address limitations ? There are a lot of multi-core non ARM product our there, Cavium Networks (MIPS), Netlogic (MIPS), Freescale (PPC), Azul (Java VM), Plurality ...

chanj0
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re: Marvell quad-core ARM targets x86 servers
chanj0   11/9/2010 5:23:54 PM
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Up to 4GB RAM may be a limitation to support multiple VMs with sophisticated service. The power saving may come down to how many VMs that can be supported on a ARM based server vs that can be supported by a x86 based server.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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