Seastar and DPDK ================ Seastar uses the Data Plane Development Kit to drive NIC hardware directly. This provides an enormous performance boost. To enable DPDK, specify `--enable-dpdk` to `./configure.py`, and `--dpdk-pmd` as a run-time parameter. This will use the DPDK package provided as a git submodule with the seastar sources. Please note, if `--enable-dpdk` is used to build DPDK on an aarch64 machine, you need to specify [target architecture](https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html) with optional [feature modifiers](https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html#aarch64-feature-modifiers) with the `--cflags` option as well, like: ```console $ ./configure.py --mode debug --enable-dpdk --cflags='-march=armv8-a+crc+crypto' ``` To use your own self-compiled DPDK package, follow this procedure: 1. Setup host to compile DPDK: - Ubuntu `sudo apt-get install -y build-essential linux-image-extra-$(uname -r)` 2. Prepare a DPDK SDK: - Download the latest DPDK release: `wget http://dpdk.org/browse/dpdk/snapshot/dpdk-2.0.0.tar.gz` - Untar it. - Edit config/common_linuxapp: set CONFIG_RTE_MBUF_REFCNT_ATOMIC and CONFIG_RTE_LIBRTE_KNI to 'n'. - Start the tools/setup.sh script as root. - Compile a linuxapp target (option 9). - Install IGB_UIO module (option 12). - Bind some physical port to IGB_UIO (option 18). - Configure hugepage mappings (option 15/16). 3. Modify the CMake cache (`CMakeCache.txt`) to inform CMake of the location of the installed DPDK SDK.