R630 - low single threaded performance

Question

Yesterday I've installed my two new R630 servers with dual Xeon E5-2640 v3's. As always I've run a benchmark to see how much these servers improve against previous generation of servers. So I run Cinebench 11.5 on my new and old servers. The multi threaded performance of the new machine is fine, but the single threaded performance is really strange. I've created a vm with 4 vcpus. This are the results on different platforms:   Host: 1 (Intel Xeon E5-2620 @ 2.4GHz) Other  vm's: none Windows 7 x64 - 4 vCPU Cinebench 11.5                multi cpu: 3.35                                                single cpu 0.85   Host: 2 (Intel Xeon E5-2630 V2 @ 2.3GHz) Other  vm's: none Windows 7 x64 - 4 vCPU Cinebench 11.5                multi cpu: 4.11                                                single cpu: 1.04   Host: 3 (Intel Xeon E5-2640 V3 @ 2.6GHz) Other  vm's: none Windows 7 x64 - 4 vCPU Cinebench 11.5                multi cpu: 4.93                                                single cpu: 0.56   The BIOS settings as well as the vSphere settings are set to high performance. CPU-z is also showing the correct cpu speed (2.6GHz). The strangest thing is the multifactor score which is more than 8, although the physical cores are only four times as much....   Any thoughts about this one?

EnterScreenName · Answer

I have 3 (New to me) R630's with the exact issue. I purchased the servers with the E5-2699 v4 CPU's. I am more than a little disappointed with the performance. I am running VM's with 4 cores. OS is Umbuntu. Running sysbench --test=cpu --threads=1 --cpu-max-prime=60000 --time=20 I get a result of 70-80 Events Per Second. I have verified that this is on all my machines. I have the CPU's set to "Performance". Is there any setting to improve individual core performance?

atafm2 · Answer

make sure you enable Dell Controlled Turbo in the bios. otherwise the cpus will not turbo by default

PowerEdge Hardware General

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