Be careful with AVX-512. It is best to use AVX-256 on Skylake. The AVX-512 applications do not run efficiently today on Skylake. It increases power consumption in the underlying cores.
Best Regards, Don On Thu, Mar 1, 2018 at 7:57 PM, Tharaneedharan Vilwanathan < vdhar...@gmail.com> wrote: > Hi Stephen, > > Appreciate your response. > > I have ESXi. I am still trying to map the KVM config with ESXi but no luck > yet. I have requested the admin to figure out. If anyone is familiar with > ESXi configuration for this, please let me know. > > Thanks > dharani > > On Fri, Feb 23, 2018 at 11:38 AM, Stephen Hemminger < > step...@networkplumber.org> wrote: > > > On Fri, 23 Feb 2018 11:16:14 -0800 > > Tharaneedharan Vilwanathan <vdhar...@gmail.com> wrote: > > > > > Hi All, > > > > > > I have a quick question. I got a new server with the CPU that should > have > > > AVX-512 support but I don't see it in Linux (Ubuntu 18.04). > > > > > > Here is the output: > > > > > > auto@auto-virtual-machine:~$ *cat /proc/cpuinfo* > > > processor : 0 > > > vendor_id : GenuineIntel > > > cpu family : 6 > > > model : 85 > > > model name : *Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz* > > > stepping : 4 > > > microcode : 0x2000029 > > > cpu MHz : 2095.078 > > > cache size : 22528 KB > > > physical id : 0 > > > siblings : 2 > > > core id : 0 > > > cpu cores : 2 > > > 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 mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm > > > constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable > > nonstop_tsc > > > cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe > popcnt > > > tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm > > > 3dnowprefetch cpuid_fault invpcid_single pti fsgsbase tsc_adjust bmi1 > hle > > > avx2 smep bmi2 invpcid rtm rdseed adx smap xsaveopt arat > > > bugs : cpu_meltdown spectre_v1 spectre_v2 > > > bogomips : 4190.15 > > > clflush size : 64 > > > cache_alignment : 64 > > > address sizes : 42 bits physical, 48 bits virtual > > > power management: > > > > > > Can someone tell me why I don't see AVX-512? > > > > > > Appreciate your help. > > > > > > Thanks > > > dharani > > > > If you are running in a VM, make sure that your hypervisor passes the avx > > flags through. > > In KVM this is usually done with the "Copy host CPU configuration" in > virt > > manager. > > >
