3. dpdk-proc-info Application

The dpdk-proc-info application is a Data Plane Development Kit (DPDK) application that runs as a DPDK secondary process and is capable of retrieving port statistics, resetting port statistics, printing DPDK memory information and displaying debug information for port. This application extends the original functionality that was supported by dump_cfg.

3.1. Running the Application

The application has a number of command line options:

./<build_dir>/app/dpdk-proc-info -- -m | [-p PORTMASK] [--stats | --xstats |
--stats-reset | --xstats-reset] [ --show-port | --show-tm | --show-crypto |
--show-ring[=name] | --show-mempool[=name] | --iter-mempool=name |
--show-port-private | --version | --firmware-version | --show-rss-reta |
--show-module-eeprom | --show-rx-descriptor queue_id:offset:num |
--show-tx-descriptor queue_id:offset:num ]

3.1.1. Parameters

-p PORTMASK: Hexadecimal bitmask of ports to configure.

–stats The stats parameter controls the printing of generic port statistics. If no port mask is specified stats are printed for all DPDK ports.

–xstats The xstats parameter controls the printing of extended port statistics. If no port mask is specified xstats are printed for all DPDK ports.

–stats-reset The stats-reset parameter controls the resetting of generic port statistics. If no port mask is specified, the generic stats are reset for all DPDK ports.

–xstats-reset The xstats-reset parameter controls the resetting of extended port statistics. If no port mask is specified xstats are reset for all DPDK ports.

-m: Print DPDK memory information.

–show-port The show-port parameter displays port level various configuration information associated to RX port queue pair.

–show-tm The show-tm parameter displays per port traffic manager settings, current configurations and statistics.

–show-crypto The show-crypto parameter displays available cryptodev configurations, settings and stats per node.

–show-ring[=name] The show-ring parameter display current allocation of all ring with debug information. Specifying the name allows to display details for specific ring. For invalid or no ring name, whole list is dump.

–show-mempool[=name] The show-mempool parameter display current allocation of all mempool debug information. Specifying the name allows to display details for specific mempool. For invalid or no mempool name, whole list is dump.

–iter-mempool=name The iter-mempool parameter iterates and displays mempool elements specified by name. For invalid or no mempool name no elements are displayed.

–show-port-private The show-port-private parameter displays ports private information.

–version The version parameter displays DPDK version.

–firmware-version The firmware-version parameter displays ethdev firmware version.

–show-rss-reta The show-rss-reta parameter displays ports rss redirection table.

–show-module-eeprom The show-module-eeprom parameter displays ports module eeprom information.

–show-rx-descriptor queue_id:offset:num The show-rx-descriptor parameter displays ports Rx descriptor information specified by queue_id, offset and num. queue_id: A Rx queue identifier on this port. offset: The offset of the descriptor starting from tail. num: The number of the descriptors to dump.

–show-tx-descriptor queue_id:offset:num The show-tx-descriptor parameter displays ports Tx descriptor information specified by queue_id, offset and num. queue_id: A Tx queue identifier on this port. offset: The offset of the descriptor starting from tail. num: The number of the descriptors to dump.

3.2. Limitations

  • dpdk-proc-info should run alongside primary process with same DPDK version.
  • When running dpdk-proc-info with shared library mode, it is required to pass the same NIC PMD libraries as used for the primary application. Any mismatch in PMD library arguments can lead to undefined behavior and results affecting primary application too.
  • Stats retrieval using dpdk-proc-info is not supported for virtual devices like PCAP and TAP.
  • Since default DPDK EAL arguments for dpdk-proc-info are -c1, -n4 & --proc-type=secondary, It is not expected that the user passes any EAL arguments.