1. DPDK Release 19.08

1.1. New Features

  • Added MCS lock.

    MCS lock provides scalability by spinning on a CPU/thread local variable which avoids expensive cache bouncings. It provides fairness by maintaining a list of acquirers and passing the lock to each CPU/thread in the order they acquired the lock.

  • Updated the EAL Pseudo-random Number Generator.

    The lrand48()-based rte_rand() function is replaced with a DPDK-native combined Linear Feedback Shift Register (LFSR) pseudo-random number generator (PRNG).

    This new PRNG implementation is multi-thread safe, provides higher-quality pseudo-random numbers (including full 64 bit support) and improved performance.

    In addition, <rte_random.h> is extended with a new function rte_rand_max() which supplies unbiased, bounded pseudo-random numbers.

  • Updated the bnxt PMD.

    Updated the bnxt PMD. The major enhancements include:

    • Performance optimizations in non-vector Tx path
    • Added support for SSE vector mode
    • Updated HWRM API to version
  • Added support for Broadcom NetXtreme-E BCM57500 Ethernet controllers.

    Added support to the bnxt PMD for the BCM57500 (a.k.a. “Thor”) family of Ethernet controllers. These controllers support link speeds up to 200Gbps, 50G PAM-4, and PCIe 4.0.

  • Added hinic PMD.

    Added the new hinic net driver for Huawei Intelligent PCIE Network Adapters based on the Huawei Ethernet Controller Hi1822. See the HINIC Poll Mode Driver guide for more details on this new driver.

  • Updated the ice driver.

    Updated ice driver with new features and improvements, including:

    • Enabled Tx outer/inner L3/L4 checksum offload.
    • Enabled generic filter framework and supported switch filter.
    • Supported UDP tunnel port add.
  • Updated Mellanox mlx5 driver.

    Updated Mellanox mlx5 driver with new features and improvements, including:

    • Updated the packet header modification feature. Added support of TCP header sequence number and acknowledgment number modification.
    • Added support for match on ICMP/ICMP6 code and type.
    • Added support for matching on GRE’s key and C,K,S present bits.
    • Added support for IP-in-IP tunnel.
    • Accelerate flows with count action creation and destroy.
    • Accelerate flows counter query.
    • Improved Tx datapath performance with enabled HW offloads.
    • Added support for LRO.
  • Updated Solarflare network PMD.

    Updated the Solarflare sfc_efx driver with changes including:

    • Added support for Rx interrupts.
  • Added memif PMD.

    Added the new Shared Memory Packet Interface (memif) PMD. See the Memif Poll Mode Driver guide for more details on this new driver.

  • Updated the AF_XDP PMD.

    Updated the AF_XDP PMD. The new features include:

    • Enabled zero copy through mbuf’s external memory mechanism to achieve high performance
    • Added multi-queue support to allow one af_xdp vdev with multiple netdev queues
    • Enabled need_wakeup feature which can provide efficient support for case that application and driver executing on the same core.
  • Enabled infinite Rx in the PCAP PMD.

    Added an infinite Rx feature which allows packets in the Rx PCAP of a PCAP device to be received repeatedly at a high rate. This can be useful for quick performance testing of DPDK apps.

  • Enabled Receiving no packet on PCAP Rx.

    Added function to allow users to run without receiving any packets on PCAP Rx. When function is called, a dummy queue is created for each Tx queue argument passed.

  • Added a FPGA_LTE_FEC bbdev PMD.

    Added the new fpga_lte_fec bbdev driver for the Intel® FPGA PAC (Programmable Acceleration Card) N3000. See the Intel(R) FPGA LTE FEC Poll Mode Driver BBDEV guide for more details on this new driver.

  • Updated TURBO_SW bbdev PMD.

    Updated the turbo_sw bbdev driver with changes including:

    • Added option to build the driver with or without dependency of external SDK libraries.
    • Added support for 5GNR encode/decode operations.
  • Updated the QuickAssist Technology (QAT) symmetric crypto PMD.

    Added support for digest-encrypted cases where digest is appended to the data.

  • Added Intel QuickData Technology PMD

    The PMD for Intel® QuickData Technology, part of Intel® I/O Acceleration Technology (Intel I/OAT), allows data copies to be done by hardware instead of via software, reducing cycles spent copying large blocks of data in applications.

  • Added Marvell OCTEON TX2 drivers.

    Added the new ethdev, eventdev, mempool, eventdev Rx adapter, eventdev Tx adapter, eventdev Timer adapter and rawdev DMA drivers for various HW coprocessors available in OCTEON TX2 SoC.

    See Marvell OCTEON TX2 Platform Guide and driver informations:

  • Introduced NTB PMD.

    Added a PMD for Intel NTB (Non-transparent Bridge). This PMD implemented handshake between two separate hosts and can share local memory for peer host to directly access.

  • Updated IPSec library Header Reconstruction.

    Updated the IPSec library with ECN and DSCP field header reconstruction feature followed by RFC4301. The IPSec-secgw sample application is also updated to support this feature by default.

  • Updated telemetry library for global metrics support.

    Updated librte_telemetry to fetch the global metrics from the librte_metrics library.

  • Added new telemetry mode for l3fwd-power application.

    Added telemetry mode to l3fwd-power application to report application level busyness, empty and full polls of rte_eth_rx_burst().

  • Updated the pdump application.

    Add support for pdump to exit with primary process.

  • Updated test-compress-perf tool application.

    Added multiple cores feature to compression perf tool application.

1.2. Removed Items

  • Removed KNI ethtool, CONFIG_RTE_KNI_KMOD_ETHTOOL, support.
  • build: armv8 crypto extension is disabled.

1.3. API Changes

  • The rte_mem_config structure has been made private. The new accessor rte_mcfg_* functions were introduced to provide replacement for direct access to the shared mem config.

  • The network structures, definitions and functions have been prefixed by rte_ to resolve conflicts with libc headers.

  • malloc: The function rte_malloc_set_limit was never implemented is deprecated and will be removed in a future release.

  • cryptodev: the uint8_t *data member of key structure in the xforms structure (rte_crypto_cipher_xform, rte_crypto_auth_xform, and rte_crypto_aead_xform) have been changed to const uint8_t *data.

  • eventdev: No longer marked as experimental.

    The eventdev functions are no longer marked as experimental, and have become part of the normal DPDK API and ABI. Any future ABI changes will be announced at least one release before the ABI change is made. There are no ABI breaking changes planned.

  • ip_frag: IP fragmentation library converts input mbuf into fragments using input MTU size via rte_ipv4_fragment_packet interface. Once fragmentation is done, each mbuf->ol_flags are set to enable IP checksum H/W offload irrespective of the platform capability. Cleared IP checksum H/W offload flag from the library. The application must set this flag if it is supported by the platform and application wishes to use it.

  • ip_frag: IP reassembly library converts the list of fragments into a reassembled packet via rte_ipv4_frag_reassemble_packet interface. Once reassembly is done, mbuf->ol_flags are set to enable IP checksum H/W offload irrespective of the platform capability. Cleared IP checksum H/W offload flag from the library. The application must set this flag if it is supported by the platform and application wishes to use it.

  • sched: Macros RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS and RTE_SCHED_PIPE_PROFILES_PER_PORT are removed for flexible configuration of pipe traffic classes and their queues size, and for runtime configuration of maximum number of pipe profiles, respectively. In addtion, wrr_weights field of struct rte_sched_pipe_params is modifed to be used only for best-effort tc, and qsize field of struct rte_sched_port_params is changed to allow different size of the each queue.

1.4. ABI Changes

  • eventdev: Event based Rx adapter callback

    The mbuf pointer array in the event eth Rx adapter callback has been replaced with an event array. Using an event array allows the application to change attributes of the events enqueued by the SW adapter.

    The callback can drop packets and populate a callback argument with the number of dropped packets. Add a Rx adapter stats field to keep track of the total number of dropped packets.

  • cryptodev: New member in rte_cryptodev_config to allow applications to disable features supported by the crypto device. Only the following features would be allowed to be disabled this way,


    Disabling unused features would facilitate efficient usage of HW/SW offload.

  • bbdev: New operations and parameters added to support new 5GNR operations. The bbdev ABI is still kept experimental.

1.5. Shared Library Versions

The libraries prepended with a plus sign were incremented in this version.

+ librte_cryptodev.so.8
+ librte_eal.so.11
+ librte_eventdev.so.7
+ librte_sched.so.3

1.6. Known Issues

1.7. Tested Platforms