Archive for the 'Xeon 5600' Category

Xeon E5-2600 OS CPU To Core / SMT Thread Mapping On Linux. It Matters.

Ages ago I blogged about the Intel topology tool and mapping Xeon 5500 (Nehalem EP) processor threads to OS CPUs on Linux. I don’t recall if I ever blogged the same about Xeon 5600 (Westmere EP) but I’ll cover that processor and Xeon E5-2600 in this short post.  Fist, Xeon 5600.

The following two screen shots are socket 0 and socket 1 from a Xeon 5600 server. Socket 0 first:

Now, socket 1:

So, based on the information above, one would have to specify OS CPUs 0,1,2,3,4,5 if they wanted thread 0 from the first 3 cores on each CPU (c0_t0). I never liked that much. That’s why I’m glad Sandy Bridge presents itself in a more logical manner. As you can see from the following two screen shots, specifying affinity for thread 0 of cores on socket 0 is as simple as 0,1,2,3,4,5,6,7. First, socket 0:

And now, socket 1:

Lest this come off as simple tomfoolery, allow me to show the 2x difference in siphoning off a fifo when the data flows socket-local versus socket-remote:

Be aware that this level of disparity will not necessarily be realized when a server is booted SUMA (nor even when BIOS NUMA is enabled but the grub boot string includes numa=off). I’d test the difference and blog that here but that would just be tomfoolery 🙂

Will Oracle Ever Release Sun Servers Based On Westmere EP and Nehalem EX Processors? Yes.

Oracle has announced the release of several new x86 servers based on the Westmere EP and Nehalem EX processors. This is a really short blog entry, because the website is so loaded with information I haven’t much to add:

Oracle Real Application Clusters Does Not Scale?
I’d like to single out an interesting benchmark. This Oracle Sun x4470 SAP SD benchmark result highlights Real Application Clusters scalability and a result in 6U worth of rack space that beats the recent HP Proliant DL980 G7 result with Microsoft by 15%. The DL980 G7 is an 8U server.

Yes, It Runs IBM DB2, Too.
Lest we forget, people do deploy IBM DB2 on Solaris. To read more follow the link:

Updated Options for Deploying IBM DB2 on Solaris x86-based Servers

Intel Xeon 5600 (Westmere EP) vs AMD Opteron 6100 (Magny-Cours)

AnandTech has a significant amount of fresh coverage of the AMD 6100 (Magny-Cours) versus the Westmere EP. It is an interesting read:

Intel Xeon 5600 (Westmere EP) versus AMD Opteron 6100 (Magny-Cours)

It’s getting quite wordy now that it takes some three syllables to express how many cores there are in some processors. We’ve gone beyond hex-core and oct-core to dodeca-core. Hmmm…


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