Decoding Intel processor models reported by Windows
When looking at system performance and capacity planning I need to know what processors a server is running.
In ^SystemPerformance Linux systems report Intel processors explicitly, for example:
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 79 model name : Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz stepping : 1 microcode : 0xffffffff cpu MHz : 2294.685
Its pretty obvious this is a Broadwell E5-2673 v4 processor, and I can get the specifications and enough details to look at the SPECint rating and other information, for example:
This also gives me clues to the age of the host server... is it reaching end of life etc.
Windows reports processors in a more coded way, by reporting the environment variable
PROCESSOR_IDENTIFIER for example:
Processor(s): 2 Processor(s) Installed. : Intel64 Family 6 Model 79 Stepping 1 GenuineIntel ~1200 Mhz : Intel64 Family 6 Model 79 Stepping 1 GenuineIntel ~1200 Mhz
This looks similar to the Linux example, but how can I tell what this processor is?
Solution 1: the easy way...
Ask someone managing the system to tell you what processors are being used!
- The information is available from the windows GUI.
- Or by command line:
wmic cpu get name
E:\Profiles\myname>wmic cpu get name Name Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz
Solution 2: the hard way...
You need to be a detective. Breaking down the code in the
PROCESSOR_IDENTIFIER string above:
Intel64 Family 6 Model 79 Stepping 1 GenuineIntel ~1200 Mhz
Intel releases processors in families. A starting point is WikiChip:
Processor Family 6 (Server) is Broadwell, Skylake, etc. The majority of performance data I get is this processor Family.
Now search for the CPU model number.
We can see that model 79 is a Broadwell processor.
- 2-socket servers use Broadwell EP, the E5-26nn V4 processors.
- 4 and 8-socket servers use Broadwell EX:
- quad-CPU: Xeon E5-46nn v4, Xeon E7-48nn v4
- octo-CPU: Xeon E7-88nn v4
Stepping is the revision number of the model. Higher revision numbers are later versions of the same model.
The reported processor speed will allow you to narrow down your search.
In this case made difficult/impossible because there is no 1.2GHz Broadwell processor, the system is probably running in power saving mode.
Number of CPU cores
In the first line of mgstat output look for numberofcpus, for example:
There are 32 cpus. On 2 processors (16 per processor).
You can also find
NUMCPU: 32 in the cstat sections of ^SystemPerformance.
Remember that the system sees cpus (threads). So you need to look for a processor model with 8 cores per processor. From there you can narrow your search. Wikipedia is a good resource.
From wikipedia I can see a couple of likely suspects:
- Xeon E5-2667 V4 and Xeon E5-2620 V4.
If you cannot get the details from the customer or access the server you can be a detective and (possibly) find the processor type.