Microsoft.com standardized on AMD Opteron
There is an interesting Microsoft white paper (word file) on how Microsoft moved away from INTEL to AMD Opteron running Windows server 2003 x64. By moving from IA32 to AMD Opteron, Microsoft saw a 50% decrease in CPU load. The paper provided quite some insights and best practice suggestions.
"In addition to the 50 percent decrease in CPU utilization, the 32-bit servers experienced noticeable spikes in which the CPUs were utilized at 100 percent for sustained periods of time. The operations team determined that a spike occurred when one or more application pools ran out of virtual memory and recycled. On the x64-based servers, these spikes do not exist because the application pools are no longer running out of memory."
In this paper, Microsoft tested some applications on Opteron on Windows x64 and was seeing up to 17.7 times performance gain (1770%).
"Microsoft.com has standardized on the HP Proliant DL585 models for the x64-based Web servers with four 2.2-GHz AMD CPUs and 16 GB of RAM. These enterprise-class servers have many redundant components, including power supplies, network adapters, and cooling fans, and have the capability for redundant array of independent disks (RAID) disk storage and RAM configurations."
No surprise here, Opteron is the king of AMD64. We all know INTEL's EM64T runs slower in 64 bit mode than 32 bit mode. IA64 (Itanium) has also lost Microsoft's blessing.
posted by Sharikou, Ph. D. @ 2/14/2006 11:09:00 AM
3 Comments:
Once again Sharikou is lying as a dog. You are an ignorant that dont understand the technical details. The MS article describes transition from the 32-bit HW to 64-bit one. It does not compare performance of the Itanium and Opteron platforms. They are comparing performance of the old 32-bit platform (Pentium III/Pentium IV/Athlon?) to 64-bit(Opteron). Moreover the observed 50 % decrease in system CPU load on 64-bit platform was attributed not to the raw speed of the CPU itself but simply was direct result of the larger memory space available on the 64-bit platform. Sharikou - try using MS Windows XP on the PC with 128 MB RAM - you will see how the CPU load depends on the memory available.....
MS article states that the 64-bit computing is good - aspecially for applications that needs a lot of memory (more than 4GB).
But remember for other tasks (not bound by the memory space available - ie. requiring < 4GB) the potential difference between 32-bit/64-bit will be == 0 or even 32-bit will be faster....
Sharikou is an ignorant.
See these spec marks and how Itanium was spanked by Opteron
http://www.aspsys.com/hardware/benchmarks/spec/chart/default.aspx/table.aspx
Sharikou is lying. Read the MS article Sharikou is referring to - all comparision MS makes are made between 32-bit and 64 bit platforms. FYI - Itanium is 64-bit platform.
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