+++ /dev/null
-KVM VMs vhost-user
-------------------
-
-QEMU is used for vhost testing enviroment. By default, standard QEMU version
-preinstalled from OS repositories is used (qemu-2.11.1 for Ubuntu 18.04,
-qemu-2.5.0 for Ubuntu 16.04) and the path to the QEMU binary can be adjusted
-in `Constants.py`.
-
-FD.io CSIT performance lab is testing VPP vhost with KVM VMs using
-following environment settings:
-
-- Tests with varying Qemu virtio queue (a.k.a. vring) sizes: [vr1024] 1024
- descriptors to optimize for packet throughput.
-- Tests with varying Linux :abbr:`CFS (Completely Fair Scheduler)`
- settings: [cfs] default settings, [cfsrr1] CFS RoundRobin(1) policy
- applied to all data plane threads handling test packet path including
- all VPP worker threads and all Qemu testpmd poll-mode threads.
-- Resulting test cases are all combinations with [vr1024] and
- [cfs,cfsrr1] settings.
-- Adjusted Linux kernel :abbr:`CFS (Completely Fair Scheduler)`
- scheduler policy for data plane threads used in CSIT is documented in
- `CSIT Performance Environment Tuning wiki
- <https://wiki.fd.io/view/CSIT/csit-perf-env-tuning-ubuntu1604>`_.
-- The purpose is to verify performance impact (MRR and NDR/PDR
- throughput) and same test measurements repeatability, by making VPP
- and VM data plane threads less susceptible to other Linux OS system
- tasks hijacking CPU cores running those data plane threads.
-
-CSIT does support two types VM definitions: Image or Kernel.
-
-Image VM
-~~~~~~~~
-
-CSIT can use a pre-created VM image. The path to image can be adjusted in
-`Constants.py`. For convenience and full compatibility CSIT repository contains
-a set of scripts to prepare `Built-root <https://buildroot.org/>`_ based
-embedded Linux image with all the dependencies needed to run DPDK testpmd, DPDK
-l3fwd, Linux bridge or Linux IPv4 forwarding.
-
-Built-root was chosen for a VM image to be lightweight and booting time
-should not impact tests duration.
-
-VM image must have installed at least qemu-guest-agent, sshd, bridge-utils,
-VirtIO support and DPDK Testpmd/L3fwd application. Username/password for the VM
-must be cisco/cisco and NOPASSWD sudo access. The interface naming is based on
-driver (management interface type is Intel E1000), all E1000 interfaces will be
-named mgmt<n> and all VirtIO interfaces will be named virtio<n>. In VM
-"/etc/init.d/qemu-guest-agent" must be set to "TRANSPORT=isa-serial:/dev/ttyS1"
-because ttyS0 is used by serial console and ttyS1 is dedicated for
-qemu-guest-agent in QEMU setup.
-
-Kernel VM
-~~~~~~~~~
-
-As an alternative to image VM, CSIT can use a kernel KVM image as a boot kernel.
-This option allows better configurability of what application is running in VM
-userspace. As a filesystem root9p is used which allows to map the host OS
-filesystem as read only guest OS filesystem.
-
-Example of custom init script for the kernel VM:
-
-::
-
- #!/bin/bash
- mount -t sysfs -o "nodev,noexec,nosuid" sysfs /sys
- mount -t proc -o "nodev,noexec,nosuid" proc /proc
- mkdir /dev/pts
- mkdir /dev/hugepages
- mount -t devpts -o "rw,noexec,nosuid,gid=5,mode=0620" devpts /dev/pts || true
- mount -t tmpfs -o "rw,noexec,nosuid,size=10%,mode=0755" tmpfs /run
- mount -t tmpfs -o "rw,noexec,nosuid,size=10%,mode=0755" tmpfs /tmp
- mount -t hugetlbfs -o "rw,relatime,pagesize=2M" hugetlbfs /dev/hugepages
- echo 0000:00:06.0 > /sys/bus/pci/devices/0000:00:06.0/driver/unbind
- echo 0000:00:07.0 > /sys/bus/pci/devices/0000:00:07.0/driver/unbind
- echo uio_pci_generic > /sys/bus/pci/devices/0000:00:06.0/driver_override
- echo uio_pci_generic > /sys/bus/pci/devices/0000:00:07.0/driver_override
- echo 0000:00:06.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
- echo 0000:00:07.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
- $vnf_bin
- poweroff -f
-
-The `$vnf_bin` variable is replaced, during runtime by the QemuUtils libraries,
-by the path to NF binary and its parameters. This allows CSIT to run the
-applications installed on host OS, for example VPP of the same version as
-running on host OS.
-
-Kernel KVM image must be available on host filesystem as a prerequisite.
-The path to kernel image is defined in `Constants.py`.
Code Review / csit.git / blobdiff