Ddpk: Add README

Author: Pavel Siska

src/plugins/input/dpdk/README.md

@@ -0,0 +1,98 @@
+# DPDK (input plugin)
+
+DPDK (Data Plane Development Kit) is used for high-performance packet processing. It enables
+direct access to network interfaces, bypassing the kernel, and is suitable for use in environments
+requiring high throughput, low latency, and high packet processing rates.
+
+## Example configuration
+
+```yaml
+input_plugin:
+  dpdk:
+    allowed_nics: "0000:ca:00.0"
+    ### Optional parameters
+    burst_size: 64
+    mempool_size: 8192
+    rx_queues: 8
+    eal_opts: null
+    mtu: 1518
+```
+
+## Parameters
+
+**Mandatory parameters:**
+
+|Parameter | Description |
+|---|---|
+|__allowed_nics__|List of allowed NICs in PCI address format `0000:XX:YY.Z` separated with `,` |
+
+**Optional parameters:**
+|Parameter | Default | Description |
+|---|---|---|
+|__burst_size__   | 64 | Number of packets processed in each burst cycle. Affects batch processing efficiency. |
+|__mempool_size__ | 8192 | Size of the memory pool used for buffering incoming packets. Must be a power of 2.|
+|__rx_queues__    | 1|  Number of RX queues workers. Increasing this can help distribute load across multiple CPU cores. |
+|__eal_opts__     | null | Extra options to be passed to the DPDK EAL (Environment Abstraction Layer). Can be used for fine-tuning DPDK behavior.|
+|__mtu__          | RTE_ETHER_MAX_LEN (1518) | Maximum Transmission Unit size for the interface. Defines the maximum packet size that can be received.|
+
+## How to use
+
+To use the DPDK input plugin, you must ensure that your system is properly configured for DPDK operation. This includes the following steps:
+
+### 1. Install DPDK Tools
+
+To begin with, you will need to install DPDK and its associated tools. Follow the installation instructions for your operating system:
+
+- **On RHEL/CentOS**:
+```sh
+dnf install dpdk-tools
+```
+
+- **On Debian/Ubuntu**:
+```sh
+apt-get install dpdk
+```
+
+### 2. Configure the DPDK Driver
+
+TODO Mellanox, broadcom, intel
+
+### 3. Allocate Hugepages
+
+DPDK requires hugepages for optimal performance. Instead of manually configuring hugepages, you can use the `dpdk-hugepages` tool, which simplifies the process.
+
+To allocate hugepages, run:
+```sh
+dpdk-hugepages.py -p 1G --setup 2G
+```
+
+This allocates 2GB of hugepages with a default page size of 1GB. You can adjust these values based on your memory requirements.
+
+To verify the allocated hugepages:
+
+```sh
+dpdk-hugepages -s
+```
+
+Recommended hugepages configuration for 100G probe is:
+
+```sh
+dpdk-hugepages.py -p 1G --setup 4G
+```
+
+### 4. Validate with dpdk-testpmd
+
+TODO
+
+## FAQ
+
+|Q: | How many `rx_queues` should I configure? |
+|---|---|
+|A: | TODO |
+
+|Q: | ??? |
+|---|---|
+|A: | TODO |
+
+
+