From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Sun, 17 Apr 2016 16:38:14 +0200 Subject: [Buildroot] [PATCH v5] dpdk: new package In-Reply-To: <1460826490-15614-1-git-send-email-viktorin@rehivetech.com> References: <1458642986-32365-1-git-send-email-viktorin@rehivetech.com> <1460826490-15614-1-git-send-email-viktorin@rehivetech.com> Message-ID: <20160417163814.03b67f53@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello, On Sat, 16 Apr 2016 19:08:10 +0200, Jan Viktorin wrote: > This patch introduces support of the DPDK library (www.dpdk.org) into > Buildroot. DPDK is a library for high-speed packet sending/receiving > while bypassing the Linux Kernel. It allows to reach a high throughput > for 10-100 Gbps networks on the x86 platform. > > The package compiles and installs DPDK libraries on the target and > staging and allows to compile other applications depending on the DPDK > library. It can also install some basic tools the DPDK provides > (testpmd, python scripts, test suite). > > The patch assumes DPDK 16.04. This version contains support for the ARM > architecture. The ARM ports can be tested by > > qemu_aarch64_virt_defconfig > qemu_arm_vexpress_defconfig > > The included hash was calculated locally by downloading the tar.gz archives by > hand. > > There are unfortunately some pitfalls: > > * it may require to enable PCI, MSIX, UIO in the Linux Kernel > (some defconfigs does not include as default and it is platform > dependent as ARMv7 almost does not use PCI) > > * when building PCAP PMD driver, the libpcap is required (partially > fixed as suggested by Arnout) > > * some tools the DPDK provides depend on Python(2) so the user has > to enable it to install those > > Signed-off-by: Jan Viktorin Thanks for this new iteration. Unfortunately, it still doesn't install any kernel module to my system. At install time, your addition of the install-kmod target simply does: make[3]: Nothing to be done for 'install-kmod'. Moreover, are you sure having a Linux kernel already built is always necessary? My understanding is that while DPDK has its own kernel modules, it can also rely on the kernel generic uio_pci_generic module. In this case, DPDK only needs to build userspace components, and no kernel component, which would make the dependency on Linux optional. >From the DPDK documentation: "To run any DPDK application, a suitable uio module can be loaded into the running kernel. In many cases, the standard uio_pci_generic module included in the Linux kernel can provide the uio capability.". Best regards, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com