3 **Data Plane Development Kit** (DPDK) is a set of drivers and libraries for fast
4 packet processing. Please note that this plugin is a polling based plugin rather
5 than an events based plugin (using it will drive up core utilization on a system).
7 **PLEASE DO NOT USE THIS PLUGIN FOR OVS-DPDK**. dpdkstat is really for DPDK
8 applications that have no other way of exposing stats. For OVS or OVS-with-DPDK the
9 Open vSwitch plugins available in collectd Version 5.8.0 should be used for
10 collecting stats and events. In addition the OVS plugin is events based rather
11 than polling based and will have a smaller footprint on the system.
15 The *dpdkstat plugin* has the following requirements:
20 You can also build with GCC 4.8 (e.g. Ubuntu 14.04) if you specify the SSSE3
21 instruction set manually:
23 make -j CFLAGS+='-mssse3'
27 * Setup the build environment:
29 Ensure that you have GCC 4.9 or later. Ubuntu 14.04, for example, has GCC
30 4.8 by default and requires an upgrade:
32 add-apt-repository ppa:ubuntu-toolchain-r/test
34 apt-get install gcc-4.9
36 If you know that the platform that you wish to run collectd on supports the
37 SSSE3 instruction set, GCC 4.8 also works if you enable SSSE3 manually:
39 make -j CFLAGS+='-mssse3'
43 git clone git://dpdk.org/dpdk
45 * Checkout the [DPDK system
46 requirements](http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html) and make
47 sure you have the required tools and hugepage setup as specified there.
49 **Note:** It's recommended to use the 1GB hugepage setup for best
50 performance, please follow the instruction for "Reserving Hugepages for DPDK
51 Use" in the link above.
53 However if you plan on configuring 2MB hugepages on the fly please ensure to
54 add appropriate commands to reserve hugepages in a system startup script if
55 collectd is booted at system startup time. These commands include:
58 mount -t hugetlbfs nodev /mnt/huge
59 echo 64 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
61 * To configure the DPDK build for the combined shared library and enable autoload
62 of pmd drivers modify `config/common_base` in your DPDK as follows
65 # Compile to share library
67 -CONFIG_RTE_BUILD_SHARED_LIB=n
68 +CONFIG_RTE_BUILD_SHARED_LIB=y
70 # Default driver path (or "" to disable)
71 -CONFIG_RTE_EAL_PMD_PATH=""
72 +CONFIG_RTE_EAL_PMD_PATH="/usr/lib/dpdk-pmd/"
74 * Prepare the configuration for the appropriate target as specified at:
75 http://dpdk.org/doc/guides/linux_gsg/build_dpdk.html.
79 make config T=x86_64-native-linuxapp-gcc
85 * Install DPDK to `/usr`
87 sudo make install prefix=/usr
89 * Create dpdk-pmd folder
91 mkdir -p /usr/lib/dpdk-pmd
93 * Create symlinks to pmd drivers
95 find /usr/lib -type f -name 'librte_pmd*' | while read path ; do ln -s $path /usr/lib/dpdk-pmd/`echo $path | grep -o 'librte_.*so'` ; done
97 **Note 1:** You must run make install as the configuration of collectd with
98 DPDK expects DPDK to be installed somewhere.
100 **Note 2:** If you don't specify a prefix then DPDK will be installed in
103 **Note 3:** If you are not root then use sudo to make install DPDK to the
104 appropriate location.
106 **Note 4:** You **MUST** create symlink to a NIC driver lib. This way collectd
107 will be able to work with device bound to dpdk.
109 * Check that the DPDK library has been installed in `/usr/lib` or `/lib`:
111 ls /usr/lib | grep dpdk
113 * Bind the interfaces to use with dpdkstat to DPDK:
115 DPDK devices can be setup with either the VFIO (for DPDK 1.7+) or UIO
118 **Note:** UIO requires inserting an out of tree driver `igb_uio.ko` that is
127 * Insert `igb_uio.ko`:
129 sudo insmod $DPDK_BUILD/kmod/igb_uio.ko
131 * Bind network device to `igb_uio`:
133 sudo $DPDK_DIR/tools/dpdk_nic_bind.py --bind=igb_uio eth1
137 * VFIO needs to be supported in the kernel and the BIOS. More information
138 can be found at: http://dpdk.org/doc/guides/linux_gsg/build_dpdk.html.
139 * Insert the `vfio-pci.ko` module:
143 * Set the correct permissions for the VFIO device:
145 sudo /usr/bin/chmod a+x /dev/vfio
146 sudo /usr/bin/chmod 0666 /dev/vfio/*
148 * Bind the network device to `vfio-pci`:
150 sudo $DPDK_DIR/tools/dpdk_nic_bind.py --bind=vfio-pci eth1
152 **Note:** Please ensure to add appropriate commands to bind the network
153 interfaces to DPDK in a system startup script if collectd is booted at
156 * Run `ldconfig` to update the shared library cache.
160 To build static DPDK library for use with collectd:
162 * To configure DPDK to build the combined static library `libdpdk.a` ensure
163 that `CONFIG_RTE_BUILD_SHARED_LIB` is set to ānā in `config/common_base` in
164 your DPDK as follows:
167 # Compile to share library
169 CONFIG_RTE_BUILD_SHARED_LIB=n
171 * Prepare the configuration for the appropriate target as specified at:
172 http://dpdk.org/doc/guides/linux_gsg/build_dpdk.html.
176 make config T=x86_64-native-linuxapp-gcc
178 * Build the target using `-fPIC`:
180 make EXTRA_CFLAGS=-fPIC -j
182 * Install DPDK to `/usr`:
184 sudo make install prefix=/usr
186 ## Build collectd with DPDK
188 **Note:** DPDK 16.04 is the minimum version and currently supported version of
189 DPDK required for the dpdkstat plugin. This is to allow the plugin to take
190 advantage of functions added to detect if the DPDK primary process is alive.
193 **Note:** The *Address-Space Layout Randomization* (ASLR) security feature in
194 Linux should be disabled, in order for the same hugepage memory mappings to be
195 present in all DPDK multi-process applications. Note that this has security
200 echo 0 > /proc/sys/kernel/randomize_va_space
202 * To fully enable ASLR:
204 echo 2 > /proc/sys/kernel/randomize_va_space
206 See also: http://dpdk.org/doc/guides/prog_guide/multi_proc_support.html
208 * Generate the build script as specified below. (i.e. run `build.sh`).
209 * Configure collectd with the DPDK shared library:
211 ./configure --with-libdpdk=/usr
213 ### Build with the static DPDK library
215 To configure collectd with the DPDK static library:
217 * Run *configure* with the following CFLAGS:
219 ./configure --with-libdpdk=/usr CFLAGS=" -lpthread -Wl,--whole-archive -Wl,-ldpdk -Wl,-lm -Wl,-lrt -Wl,-lpcap -Wl,-ldl -Wl,--no-whole-archive"
221 * Make sure that dpdk and dpdkstat are enabled in the *configure* output.
227 libdpdk . . . . . . . . yes
231 dpdkstat . . . . . . .yes
235 make -j && make -j install.
237 **Note:** As mentioned above, if you are building on Ubuntu 14.04 with
238 GCC <= 4.8.X, you need to use:
240 make -j CFLAGS+='-mssse3' && make -j install
244 * The same PCI device configuration should be passed to the primary process as
245 the secondary process uses the same port indexes as the primary.
246 * A blacklist / whitelist of NICs isn't supported yet.
250 The *dpdkstat plugin* is copyright (c) 2016 *Intel Corporation* and licensed
251 under the *MIT license*. Full licensing terms can be found in the file