Hi!

please could anyone give me some hint about this issue:

I noticed that my CPU performance is significant lower than I'm used to.

When I checked this:

 

cat /sys/devices/system/cpu/intel_pstate/no_turbo

 

I got: "1"

That means turbo boost is disabled!!!

When I try this (also as sudo):

 

echo "0" > /sys/devices/system/cpu/intel_pstate/no_turbo

 

I get:

 

echo: write error: Operation not permitted

 

Any ideas how to set "no_turbo" to "0" to permanently enable turbo boost ?

The cpu can  boost up to 3.5GHz and currently is locked at 2.0GHz, so I would expect a nice performance gain...

Turbo boost is usually enable by default, what CPU do you have?

I have E5-2686v3 dual socket cpu.

They work well and boost in bare metall systems and I tested with XenServer too.

I can't find it on Intel ARK site, is that a ES or OEM tray CPU?

 

Post the output of:

 

lscpu

Its an OEM CPU.

Please have a look here:

 

http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%20E5-2686%20v3.html

Post the output of:

 

lscpu

Here we go:

 

root@Tower:~# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                72
On-line CPU(s) list:   0-71
Thread(s) per core:    2
Core(s) per socket:    18
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 63
Model name:            Intel(R) Xeon(R) CPU E5-2686 v3 @ 2.00GHz
Stepping:              2
CPU MHz:               1412.343
CPU max MHz:           3500.0000
CPU min MHz:           1200.0000
BogoMIPS:              3996.61
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              46080K
NUMA node0 CPU(s):     0-17,36-53
NUMA node1 CPU(s):     18-35,54-71
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca        cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1g       b rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_t       sc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3        sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline       _timer aes xsave avx f16c rdrand lahf_lm abm arat epb pln pts dtherm tpr_shadow        vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid        cqm xsaveopt cqm_llc cqm_occup_llc

 

Don't now why it's not working, everything looks normal, all my Xeon servers have turbo enable by default.

Strange thing is that I can't enable it...

It tell me I'm not permitted?

 

Is there anything I could try like reinstall unraid?

For this would it be enough to setup the usb stick?

 

 

Shame on me!!!

By accident, in bios power state settings were disabled...

Now the linux pstate governor has enabled the cpu boost.

 

Many thanks for your help - and sorry for wasting your time!