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On this day, 02-August-2007 10:27 PM, Bob Sanders wrote: |
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> P.V.Anthony, mused, then expounded: |
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>> I must say that I love the intel drivers for the network and sata. If |
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>> only amd has some chip sets for their own cpus and good open source |
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>> drivers for their chip sets. Intel has that covered and I think the |
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>> intel drivers are open source. |
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>> |
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> |
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> It's more the chipset than the drivers. The Intel GigE chip controller |
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> has a built-in tcp offload engine that removes cpu loading of network |
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> traffic, if enabled in the Linux kernel. |
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> |
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> Of the available chipsets for AMD support, only Nvidia has a proprietary |
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> driver, thus the need for the reverse engineered driver. Most non-Nvidia |
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> chipset platform for AMD use either Broadcom or Intel GigE chips. And the |
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> Broadcom drivers have been well tested over the years. So, other than |
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> TCP offload, I wouldn't avoid evaluating a specific option due to a concern |
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> about drivers. |
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> |
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> SATA - again with AMD you have some options - nVidia or Broadcom, either work fine, |
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> as does the Intel SATA controller. That said, be cautious of using the Intel |
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> software raid from the bios. I've not found it to be consistantly implemented, |
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> nor for it to always work well. Generally, unless a real hardware raid is offered, |
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> such as a LSI 1064 or 1068 SAS/SATA chip, stay with kernel supported software raid. |
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> |
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> And SATA in general, in rack mount enclosures, can suffer in performace, especially |
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> in 1U enclosures due to fan vibration. Inspect the fan mounting and insure that |
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> the fans are isolated from the chassis with rubber mounting bushings or grommits. |
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> |
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> And make sure the latest bios, bmc, and other firmware is installed and up to date! |
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> It's important. |
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> |
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> Don't confuse yourself by thinking that because Intel makes it's own chipset, that |
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> it's a better platform than anything available for AMD. Intel has two goals for |
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> making it's own chipset - vertical control of it's market, thus maximizing it's profit, |
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> and because OEMs don't want to have to think about having to do any real engingeering |
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> when putting their logo on a platform. AMD's being forced into the platform direction |
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> because of OEMs. |
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> |
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> ALso, consider that while Intel does have very good engineering, it's entire platform |
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> is proprietary. Only recently did it open up it's socket to counter AMD with |
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> programmable, pluggable ASICs. |
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> |
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> AMD on the other hand runs on an open bus architecture. So anyone can add things to it, |
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> with minimal licensing - making something for HyperTransport requires joining the |
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> consortium (and it's not part of AMD). So it open source is important, I'd think |
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> you'd want an open platform, where you get to choose the best infrastructure |
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> for your computing needs. |
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> |
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> Tyan offers both platforms to best meet what you think you're needs are. And you should |
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> look at those needs in that perspective. From your mix of apps, I'm not so sure the |
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> Intel platform is going to be the best. It really depends upon the overall mix. If |
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> you have more active database access than network traffic, then something with a higher |
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> sustained memory bandwidth, along with higher i/o bandwidth is going to provide much |
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> better performance. If the mix is mostly crunching on data retrieved, thus lots |
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> of FP or integer activity, than cpus with large caches and speed are more important. |
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> |
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> Typically, when compute power is more important to the mix, the Intel Core2 platform |
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> will perform the best. When memory and i/o bandwidth are important - database |
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> transactions, the AMD platform delivers a higher sustained bandwidth. And if |
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> the job mix is very peaky - lots of variations with long periods of lull time, |
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> the AMD platform will deliver overall power savings and require less cooling for |
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> a decrese in peak performance. |
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> |
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> Bob |
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> - |
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|
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Thank you very much. Real cool advice. This information is really very |
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useful. |
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|
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P.V.Anthony |
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|
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-- |
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