Hi Don, Thanks for sharing your thoughts.
The CPU I have is: "Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz" Would what you say apply to this as well? Anyway, the prime reason why I am having this server is to play with AVX-512. So I would like to try it. Regards dharani On Tue, Mar 13, 2018 at 8:20 PM, Don maillist <[email protected]> wrote: > 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 < > [email protected]> 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 < >> [email protected]> wrote: >> >> > On Fri, 23 Feb 2018 11:16:14 -0800 >> > Tharaneedharan Vilwanathan <[email protected]> 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. >> > >> > >
