From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <xiangxia.m.yue@gmail.com>
Received: from mail-ot0-f170.google.com (mail-ot0-f170.google.com
 [74.125.82.170]) by dpdk.org (Postfix) with ESMTP id 98B1E1B024
 for <dev@dpdk.org>; Wed, 10 Jan 2018 15:26:12 +0100 (CET)
Received: by mail-ot0-f170.google.com with SMTP id d10so14386850oti.7
 for <dev@dpdk.org>; Wed, 10 Jan 2018 06:26:12 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;
 h=mime-version:from:date:message-id:subject:to;
 bh=664pXXaI8Dt67GuyulTUu2EqbhjBD+slsfZYzH0hN+w=;
 b=KCxnFNlWguR3oDyENJcU6W/CwqhRK9bSNDIbqHh3dFCIGGB6ZkknjTpF+G2L1OAOoW
 97GO1yzqQ4IOWBZk5v0XKMlw/aI/ZaxUKd2JDGhi9EIoK1Bdv/tdV5PfErU3KRA3lxa0
 p7vF4Th6YVvhXUmBBcMvwBawyOYWie/q31P37ItYfFFjLzTrrbo+mhrX5L+z7khCVuwo
 mwK6T8QV3WiYhpMXIGV3COUUUpvjItZsE02OnNek/7mluMrmWrzvi90omu+9lFcOoen3
 GAF+arn+XyGFFkK54uHVbJSU+D1+hxtSqGhExhteTjwh0fgp+dB1EW89bC+S2lP5eMfY
 7goA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=664pXXaI8Dt67GuyulTUu2EqbhjBD+slsfZYzH0hN+w=;
 b=EjTztXISA3VourJMV4u7YEIeQ1ynzYjG5iSQY5nNN4UYzwTDI1lRO03Y/GOAdrx647
 g/GZMRr54qr8emxZo/1L7BoOk/1W5yaufHmWzl3H6aPB3lR3vM2cJbLhTEbSW9RhA78x
 KIK6xSVI3qJpYs9UNaX04B/tB4EDn01afbkHAxZLUv4UeCHnPFzREvYw0zsoOpVu4dRQ
 6VVsRm1YsWu4Nn+pt6CJOHRYF9+eOtrWWwRp+FbyUqsNFf/FxUSEnm/UZgKLdEjGon/+
 YNBpiAHL20OAOsUxYVok82nCRief7m7KJpRva1kpUttA+gckvx4htQ7tFk6lUnUlBRom
 ptTQ==
X-Gm-Message-State: AKwxyteRhlsoyHiCkITt+246temE6kdaVJHuIjZsHs3chKezEsY9sn8X
 An/cBiS5D9F9i9UEqFAi6OMqiywI9BBUK98ZKSvZWeHt
X-Google-Smtp-Source: ACJfBouzfqj78pdfZZDXC6oYPL5YCbRdhPTD/1cs5o89gdu4ADAHiwVpuYr/cFTRf0SkdsprfDIK2R457xHqv/WJD9s=
X-Received: by 10.157.0.70 with SMTP id 64mr11791984ota.163.1515594371844;
 Wed, 10 Jan 2018 06:26:11 -0800 (PST)
MIME-Version: 1.0
Received: by 10.74.151.65 with HTTP; Wed, 10 Jan 2018 06:26:11 -0800 (PST)
From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Date: Wed, 10 Jan 2018 22:26:11 +0800
Message-ID: <CAMDZJNVVrQt6k+YRFJjhscaxJhnWC7P39CT0qQ-3i_cYbHFtuQ@mail.gmail.com>
To: dev@dpdk.org
Content-Type: text/plain; charset="UTF-8"
Subject: [dpdk-dev] vhost-user performance.
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Jan 2018 14:26:12 -0000

hi,
I tested the vhost-user, but i dont get a better performance.
The test case is VM2VM which are in the same host.

if we use the vhost-net in kernel, we get a 20 Gbits/sec throughput,
but vhost-user is only 5Gits/sec.

vhost-net:
qemu-system-x86_64 -enable-kvm -m 1G -smp 4 \
-cpu host \
-netdev tap,ifname=tap0,id=hostnet0,vhost=on,script=no,downscript=no
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:02:d9:01 \
-mem-prealloc \
-display none -nographic \
/root/zth/local/qemu-img/__centos7_base.img

vhost-user:
qemu-system-x86_64 -enable-kvm -m 1G -smp 1 \
-chardev socket,id=char1,path=/tmp/dpdkvhostclient0,server \
-netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce \
-device virtio-net-pci,netdev=mynet1,mac=52:54:00:02:d9:01 \
-object memory-backend-file,id=mem0,size=1G,mem-path=/dev/hugepages,share=on \
-numa node,memdev=mem0,nodeid=0 \
-monitor unix:/var/run/qemu.sock,server,nowait \
-mem-prealloc \
-display none -nographic \
/root/zth/local/qemu-img/__centos7_base.img


The vhost-user does't do better in the VM2VM case ?