Preparing the Host

Unbind virtio_net drivers and install the fio tool on the host server.

Before you begin

Make sure that you have:

Installed a Napatech IPU in a server. See Installing a Napatech IPU.
Programmed the IPU with an appropriate FPGA image. See Napatech Link-Storage™ Software FPGA images.

About this task

Note: The following prompts are used to indicate which part of the system to run the provided commands on.

host#: The server where the IPU is installed.

Procedure

On the host, disable virtio_net drivers.
Create a script with the file name, disable_virtio_net.sh. For example:
```
host# vim disable_virtio_net.sh
```
Copy and paste the following commands in the file.
```
#!/bin/bash
for n in $(lspci -n | grep 1af4:1000 | cut -d' ' -f1)
do
  echo unbinding $n;
  echo 0000:$n > /sys/bus/pci/devices/0000:$n/driver/unbind;
done
```

On the host, execute the script.

host# chmod +x disable_virtio_net.sh
host# ./disable_virtio_net.sh

An output example:

unbinding 0f:00.0
unbinding 10:00.0
unbinding 11:00.0
unbinding 12:00.0
unbinding 13:00.0
unbinding 14:00.0
unbinding 15:00.0
unbinding 16:00.0
unbinding 17:00.0
unbinding 18:00.0
unbinding 19:00.0
unbinding 1a:00.0

Install the fio tool.

For example:

host# dnf group install "Development Tools"
host# dnf install libaio-devel
host# git clone git://git.kernel.dk/fio.git
host# cd fio
host#  ./configure
host#  make
host#  make install

Check the directory where fio is installed.
For example:
```
which fio
```
An output example:
```
/usr/local/bin/fio
```