about open HDC capability on Xeon

[zmud]

Hello :

I want to open HARDWARE DUTY CYCLING (HDC) on my XEON , I have open HWP ,but seems HDC still false with cpuid information -- HDC base registers = false

What item should I select to open it in BIOS ?

B.R

[SergioS_Intel]

Hello zmud,

Thank you for contacting Intel Customer Support.

We do recommend contacting the manufactufacturer of your server board and check with them if there is an option on the BIOS to open the HDC.

Additionally, please provide us the model on your Xeon processor.

Best regards,

Sergio S.

Intel Customer Support Technician

For firmware updates and troubleshooting tips, visit :https://intel.com/support/serverbios

[zmud]

thank for your reply , if your mean the model information in register ,  I get it from cpuid

CPU 79:
vendor_id = "GenuineIntel"
version information (1/eax):
processor type = primary processor (0)
family = Intel Pentium Pro/II/III/Celeron/Core/Core 2/Atom, AMD Athlon/Duron, Cyrix M2, VIA C3 (6)
model = 0x5 (5)
stepping id = 0x4 (4)
extended family = 0x0 (0)
extended model = 0x5 (5)
(simple synth) = Intel Pentium II / Pentium III / Pentium M / Celeron / Celeron M / Core / Core 2 / Core i / Xeon / Atom (unknown model)
miscellaneous (1/ebx):
process local APIC physical ID = 0x79 (121)
cpu count = 0x40 (64)
CLFLUSH line size = 0x8 (8)
brand index = 0x0 (0)

[SergioS_Intel]

Hello zmud,

Thank you for your reply, we could not find the model of your Xeon processor based on your report, please download and install the Intel® System Support Utility for Windows and attach the txt file.

https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility-for-Windows-

Best regards,

Sergio S.

Intel Customer Support Technician

[zmud]

My server run on linux , how about update information as below?

processor : 78
vendor_id : GenuineIntel
cpu family : 6
model : 85
model name : Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
stepping : 4
microcode : 0x2006906
cpu MHz : 1001.194
cache size : 28160 KB
physical id : 1
siblings : 40
core id : 27
cpu cores : 20
apicid : 119
initial apicid : 119
fpu : yes
fpu_exception : yes
cpuid level : 22
wp : yes
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 pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf 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 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 invpcid_single pti ssbd mba ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb intel_pt avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts hwp hwp_act_window hwp_epp hwp_pkg_req pku ospke md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit
bogomips : 4002.07
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:

[SergioS_Intel]

Hello zmud,

We appreciate the additional information. Now in regards your original question, please contact your board manufacturerand check with them if it possible to open the HDC option on the BIOS.

Best regards,

Sergio S.

Intel Customer Support Technician

For firmware updates and troubleshooting tips, visit :https://intel.com/support/serverbios

[zmud]

hi:

Thank for your reply .

could I get a confirmation that my cpu support HDC ?

B.R

[n_scott_pearson]

I had zero hits for HDC in either volume of the processor datasheet.

...S

[zmud]

Hello :

I find it in 

Intel® 64 and IA-32 ArchitecturesSoftware Developer’s ManualVolume 3B:System Programming Guide, Part 2

charpt 14.5 HARDWARE DUTY CYCLING (HDC)

[n_scott_pearson]

Yea, but those documents are for the full superset of features. I guess we will need @SergioS_Intel to look into this after all.

...S

[SergioS_Intel]

Hello zmud,

We are glad to read that you were able to find the information that you were looking for. Please let us know if you need anything else from us.

Best regards,

Sergio S.

Intel Customer Support Technician

[zmud]

 Hi  SergioS_Intel :

Thank for your reply, I will check with board manufacturerand for the HDC enable.

But just as  n_scott_pearson said,   I want to get a confirmation from you that my cpu support HDC.

B.R

[SergioS_Intel]

Hello zmud,

Please allow us to get confirmation from our upper-level support on your question and we will get back to you.

Best regards,

Sergio S.

Intel Customer Support Technician