Re: CentOS 6 / Intel CPU support

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> Here's mine.  Interesting differences:

If you disable Intel Speedstep in the BIOS it should lock the CPU to its
fastest speed, but you lose power saving during idle.

On Thu, May 11, 2017 at 3:48 PM, ken <gebser@xxxxxxxxxxxx> wrote:

> On 05/11/2017 12:45 PM, Leon Fauster wrote:
>
>> Am 11.05.2017 um 16:29 schrieb Leon Fauster <leonfauster@xxxxxxxxxxxxxx>:
>>>
>>> Am 11.05.2017 um 14:48 schrieb Leon Fauster <leonfauster@xxxxxxxxxxxxxx
>>>> >:
>>>>
>>>> https://access.redhat.com/support/policy/intel
>>>>
>>>> shows mainly Xeon CPUs. What about
>>>>
>>>> Intel Core i7-6700 Quad-Core Skylake
>>>>
>>>> has the current EL6 variant support for it?
>>>>
>>>> Any experience? Feedback would be greatly appreciated.
>>>>
>>>
>>> I found this
>>>
>>> linux-2.6.32-696.1.1.el6/arch/x86/kernel/setup.c
>>>
>>> 796     if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
>>> 797         ((boot_cpu_data.x86 == 6))) {
>>> 798         switch (boot_cpu_data.x86_model) {
>>> 799         case 94: /* Skylake-S */
>>> 800         case 86: /* Broadwell-DE SoC */
>>> 801         case 85: /* Purley */
>>> 802         case 79: /* Broadwell-EP and EX */
>>> 803         case 78: /* Skylake-Y */
>>> 804         case 77: /* Atom Avoton */
>>> 805         case 71: /* Broadwell-H */
>>> 806         case 70: /* Crystal Well */
>>> 807             break;
>>> 808         default:
>>> 809             if (boot_cpu_data.x86_model > 63) {
>>> 810                 printk(KERN_CRIT
>>> 811                        "Detected CPU family %d model %d\n",
>>> 812                        boot_cpu_data.x86,
>>> 813                        boot_cpu_data.x86_model);
>>> 814                 mark_hardware_unsupported("Intel CPU model");
>>> 815             }
>>> 816             break;
>>> 817         }
>>> 818     }
>>>
>>> not sure if "case 94: /* Skylake-S */" means support for Intel Core
>>> i7-6700 Quad-Core Skylake ...
>>>
>>
>> for the record:
>>
>> model 94 seems to be supported since EL6.7.
>>
>> A quick install could be booted without issues.
>>
>>
>> # cat /proc/cpuinfo | head -26 ; uname -a
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 94
>> model name      : Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
>> stepping        : 3
>> microcode       : 85
>> cpu MHz         : 3408.025
>> cache size      : 8192 KB
>> physical id     : 0
>> siblings        : 8
>> core id         : 0
>> cpu cores       : 4
>> apicid          : 0
>> initial apicid  : 0
>> 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 arch_perfmon pebs bts rep_good xtopology
>> nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2
>> ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
>> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch ida
>> arat epb xsaveopt pln pts dtherm hwp hwp_noitfy hwp_act_window hwp_epp
>> tpr_shadow vnmi flexpriority ept vpid fsgsbase bmi1 hle avx2 smep bmi2 erms
>> invpcid rtm rdseed adx
>> bogomips        : 6816.05
>> clflush size    : 64
>> cache_alignment : 64
>> address sizes   : 39 bits physical, 48 bits virtual
>> power management:
>>
>> Linux srv-s01.ccds.de 2.6.32-696.1.1.el6.x86_64 #1 SMP Tue Apr 11
>> 17:13:24 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
>>
>> --
>> LF
>>
>
> Here's mine.  Interesting differences:
>
> # cat /proc/cpuinfo | head -26; uname -a
> processor    : 0
> vendor_id    : GenuineIntel
> cpu family    : 6
> model        : 94
> model name    : Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
> stepping    : 3
> microcode    : 0x9e
> cpu MHz        : 899.945
> cache size    : 6144 KB
> physical id    : 0
> siblings    : 8
> core id        : 0
> cpu cores    : 4
> apicid        : 0
> initial apicid    : 0
> 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 aperfmperf eagerfpu pni pclmulqdq dtes64 monitor
> ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe
> popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm
> 3dnowprefetch ida arat epb pln pts dtherm hwp hwp_noitfy hwp_act_window
> hwp_epp intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust
> bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt
> xsaveopt xsavec xgetbv1
> bogomips    : 5184.00
> clflush size    : 64
> cache_alignment    : 64
> address sizes    : 39 bits physical, 48 bits virtual
> power management:
>
> Linux null.example.com 3.10.0-514.16.1.el7.x86_64 #1 SMP Wed Apr 12
> 15:04:24 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
>
>
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