Intel Turbo Boost Technology is enabled by default on supported processors. You can disable or enable the technology with a switch in the BIOS. No other user-controllable settings to change the Intel Turbo Boost Technology operation are available. Once enabled, Intel Turbo Boost Technology works automatically under operating system control.
Hi. I reckon that this is a post over a year old by now, but while searching for something completely different I came across this. Last year we bought a few DL360 Gen10 with 6248R CPU's. They are running Hyper-V opposed to your VMware, but I had the same question and for what it's worth I wanted to have the best performance. I tested with different settings on both the host itself (running Server Datacenter with GUI for testing purposes) and within a VM with those different settings.
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At the time, with the then latest BIOS, setting the BIOS C-Stated disabled which is recommended everywhere, the CPU runs at a constant speed, but only a few 100MHz above base clock and nowhere near it's max Turbo frequency. Somehow this might make sense. I know from desktop CPU's (not sure how much Xeons actually differ from this) that Turbo cannot be achieved on all cores, and is heavily dependent of the whole package consumption. So it might just be that with all cores running at their base-clock + a little bit already, 'real' turbo isn't feasible in terms of TDP / heat / consumption anymore. But anyway you'll at least have stable performance.
When I set the BIOS to OS control and C-Stated enabled though, I was actually rather surprised. With C-Stated enabled I can actually reach the max turbo frequency, given that not too many cores are loaded.
Note that with Hyper-V at least the host will show actual CPU frequencies in CPU tools, or even taskmanager, but within VM's you'll always see the base-clock reported regardless of how fast the actual physical CPU is running.
All tests were run 5 times and the values were all equal. It seems Windows can do a better job than the servers itself in managing power and performance. The above values are of course depending on the load you throw at it. If you load the host with a lot of VM's and all CPU cores are busy, you'll probably not get much improvement with OS control and C-Stated enabled. However, as testing the host itself shows (which tests ALL cores on 100% load) even then having C-Stated enabled helps a little bit. In our environment though we don't have many VM's that are constantly taxing the CPU 100%, which means that with C-Stated enabled, we actually get a nice performance boost as the full turbo-frequency can now be reached. However bear in mind when the overall host CPU load gets to high, it might throttle down, so if you want very predictable values, don't enable C-States.
As you see another thing is we enabled OS control in stead of Static High Performance in the power regulator settings. After office hours our systems aren't loaded anymore. We simply run a scheduled task that sets all hypervisors to 'balanced mode' after office hours + 1 hour, and sets it back to high performance at office hours - 1 hours. This makes the host throttle the CPU down if the power is not required and it saves us quite a lot on power consumption. And if a user would still log in - the CPU's can still ramp up if needed - it's just that they don't run at full speed all night long without any avail.
One more thing I noticed is a difference in CPU behaviour between different types of CPU's. Above is all with 6248R CPU's, which are rather beasts. I have a bunch of machinines with Xeon Gold 5118 CPU's, with baseclock 2.30Ghz and turbo to 3.2GHz. However, when I stress test THOSE CPU's on host level, with all cores stressed it ramps down to 1.6GHz regardless of BIOS settings. That CPU can't even keep it's base clock on all cores, regardless of BIOS settings.
Intersetinfg results and it seems that you actually find an answer to get trubo frequenzy out of servers cpu. Ill need to check how many cores I have used for VMs (only two of those) since it seems that high cpu speed and all cores used doens't go together.
Thanks for the last picture too. It helps.
Intel Turbo Boost is Intel's trade name for central processing units (CPUs) dynamic frequency scaling feature that automatically raises certain versions of its operating frequency when demanding tasks are running, thus enabling a higher resulting performance.
The frequency is accelerated when the operating system requests the highest performance state of the processor. Processor performance states are defined by the Advanced Configuration and Power Interface (ACPI) specification, an open standard supported by all major operating systems; no additional software or drivers are required to support the technology.[1] The design concept behind Turbo Boost is commonly referred to as "dynamic overclocking".[2]
When the workload on the processor calls for faster performance, the processor's clock will try to increase the operating frequency in regular increments as required to meet demand. The increased clock rate is limited by the processor's power, current, and thermal limits, the number of cores currently in use, and the maximum frequency of the active cores.[1]
Frequency increases occur in increments of 133 MHz for Nehalem processors and 100 MHz for Sandy Bridge, Ivy Bridge, Haswell and Skylake processors. When any electrical or thermal limits are exceeded, the operating frequency automatically decreases in decrements of 133 or 100 MHz until the processor is again operating within its design limits.[1][4] Turbo Boost 2.0 was introduced in 2011 with the Sandy Bridge microarchitecture, while Intel Turbo Boost Max 3.0 was introduced in 2016 with the Broadwell-E microarchitecture.[1][5][6][7]
A feature of Turbo Boost 2.0 is that it introduced time windows with different levels of power limits, so that a processor can boost to a higher frequency for a few seconds. These limits are configurable in software for unlocked processors. Some motherboard vendors intentionally use values higher than Intel's default for performance, causing the processor to exceed its thermal design power (TDP).[8]
Some Intel Core X Processors and some newer Intel Core Processors (e.g. 10th Gen Desktop Core i7) support Intel Turbo Boost Max 3.0 Technology. Newer version Windows 10 and Linux kernel support Intel Turbo Boost Max 3.0 Technology.[9]
A similar feature called Intel Dynamic Acceleration (IDA) was first available with Core 2 Duo, which was based on the Santa Rosa platform and was released on May 10, 2007. This feature did not receive the marketing treatment given to Turbo Boost. Intel Dynamic Acceleration dynamically changed the core frequency as a function of the number of active cores. When the operating system instructed one of the active cores to enter C3 sleep state using the Advanced Configuration and Power Interface (ACPI), the other active core(s) dynamically accelerated to a higher frequency.
Intel Turbo Boost Technology Monitor, as a GUI utility, could be used to monitor Turbo Boost; this utility has reached the end-of-life state by no longer supporting Intel processors released after Q2 2013, and is no longer available.[12]
All information provided is subject to change at any time, without notice. Intel may make changes to manufacturing life cycle, specifications, and product descriptions at any time, without notice. The information herein is provided "as-is" and Intel does not make any representations or warranties whatsoever regarding accuracy of the information, nor on the product features, availability, functionality, or compatibility of the products listed. Please contact system vendor for more information on specific products or systems.
Intel classifications are for general, educational and planning purposes only and consist of Export Control Classification Numbers (ECCN) and Harmonized Tariff Schedule (HTS) numbers. Any use made of Intel classifications are without recourse to Intel and shall not be construed as a representation or warranty regarding the proper ECCN or HTS. Your company as an importer and/or exporter is responsible for determining the correct classification of your transaction.
Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See -numbers.html for details.
Max Turbo Frequency refers to the maximum single-core processor frequency that can be achieved with Intel Turbo Boost Technology. See www.intel.com/technology/turboboost/ for more information and applicability of this technology.
Our OS is Windows Server 2012 Standard, our power option is set to High Performance and I cannot find the reason for this behaviour. Contacting Dell support, they had failed to provide some light in this matter and no conclusive answer has given. They blame it to Hyper-V service installed on machine, but no documentation about it was provided.
This feature is only available on Intel microprocessors that support Turbo Boost and have the feature enabled and supported (e.g. most OSs). Under various workloads, especially ones that are relatively low in power demands and are lightly threaded or not threaded at all, the processor can take advantage of the headroom by increasing the clock frequency - while staying within thermal and electrical limits. The decision to kick into turbo boost is automatic and algorithmic in nature based on a number of factors such as: estimated current consumption, estimated power consumption, core temperature, and the number of active cores.
Turbo Boost Technology (TBT) is a microprocessor technology developed by Intel that attempts to enable temporary higher performance by opportunistically and automatically increasing the processor's clock frequency. This feature automatically kicks in...
I had a 2016 MBP 2,9 GHz up to 4,0 GHz (turbo boost). Usually, while processing models, the speed went almost 4,0 GHz. That is, turbo boost worked fine and I was very satisfied with the Apple's notebook. 152ee80cbc