From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f170.google.com (mail-io0-f170.google.com [209.85.223.170]) by dpdk.org (Postfix) with ESMTP id 88B765F54 for ; Wed, 14 Mar 2018 04:20:14 +0100 (CET) Received: by mail-io0-f170.google.com with SMTP id k21so2620834ioc.2 for ; Tue, 13 Mar 2018 20:20:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=7C41p0gnPAMPuZZEyD78BlY77pYlMf1zB+TGk4M+FX8=; b=ZwNreCcZNW0ShA/aFHnWOM3hcvFHoXcq6QUuy6cUw+SBvvQeB0rGljM39XPTYpn3sF Dxex6mZbbikSN4EGLaErtQxnBkVMayIzVwIpomx4BsNoVsGKoJnzoItAenWBpD2Wf/2Q vDPf9mBk0BwDK84H3YqH/BptQVE1/GuLT44UF6aLa/ax0+vD4nRWiRFk3+174yS3WBPv Ue+H31XQRUerFHS4B1EDENxdN8rsO6TSQpI2eguoaMehuecWrjofwPYD05YzJKDuRVHC Xy+lgeY47MxXBnJQNPyM6C9wrvp85XL4ws6UcRmZOKZGBxcPhV5DKziOxXTW0E+XcbiP At8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=7C41p0gnPAMPuZZEyD78BlY77pYlMf1zB+TGk4M+FX8=; b=AI5Hds1p2aMpIx4gx8lq6k+vHRfyIJJVqSCBcLzK7lyAK4HkxF4zD3bkKS+w505PT5 uN55kdmrvPhPT2Mk4c6tmDE1fN6sE57BniNC36JIbc2hB4nuFoZZhskw7YuCAsNY9dwS 9UjFun/NxZTIrybUQ71NvzRJ40tqWYCePE/1MonEqooxauaQVx/jeqP8F9c3gxc9gE16 wfzEivgFnMLwMsIo+dCLU1kSknjiLeyC+FPTxFLn5+Oi0oOWFZZ19ZfZ7wNVccn9mveJ eBbuqOXMylyWIi0oC2/NqGU5m8pXhYz0iILxsHnQQfcHSBfvPP6ioFsVgRE4OZgwP5Mk E8qQ== X-Gm-Message-State: AElRT7HWBVYOkzy3dG0Apix/MNminm+p5DOrq7ppNZrnB0v6TsIWM7jD 6bWDsJghF1J8pA2RoKGjR7NEvhbgY+LKJP+TsO4= X-Google-Smtp-Source: AG47ELvF23YLc3MlTa0DK8SrXmqfy6J8BQJWOa4+1FfEV8ziuRivqlFdG8rqoskfFzyOWkrcD6JpeXiUh7TtgWiQuGk= X-Received: by 10.107.189.199 with SMTP id n190mr3350671iof.64.1520997613763; Tue, 13 Mar 2018 20:20:13 -0700 (PDT) MIME-Version: 1.0 Received: by 10.79.207.129 with HTTP; Tue, 13 Mar 2018 20:20:13 -0700 (PDT) In-Reply-To: References: <20180223113804.7894413f@xeon-e3> From: Don maillist Date: Tue, 13 Mar 2018 22:20:13 -0500 Message-ID: To: Tharaneedharan Vilwanathan Cc: Stephen Hemminger , users X-Mailman-Approved-At: Thu, 15 Mar 2018 22:50:55 +0100 Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-users] AVX-512 X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Mar 2018 03:20:14 -0000 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 < vdharani@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 < > stephen@networkplumber.org> wrote: > > > On Fri, 23 Feb 2018 11:16:14 -0800 > > Tharaneedharan Vilwanathan 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. > > >