--- name: "rte_event_dev_info" section: "3" platform: "linux" package: "dpdk-doc" version: "24.11.4-0+deb13u1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/rte_event_dev_info" --- # rte\_event\_dev\_info(3) ## NAME rte\_event\_dev\_info ## SYNOPSIS `#include ` ### Data Fields const char \* **driver\_name**\ struct rte\_device \* **dev**\ uint32\_t **min\_dequeue\_timeout\_ns**\ uint32\_t **max\_dequeue\_timeout\_ns**\ uint32\_t **dequeue\_timeout\_ns**\ uint8\_t **max\_event\_queues**\ uint32\_t **max\_event\_queue\_flows**\ uint8\_t **max\_event\_queue\_priority\_levels**\ uint8\_t **max\_event\_priority\_levels**\ uint8\_t **max\_event\_ports**\ uint8\_t **max\_event\_port\_dequeue\_depth**\ uint32\_t **max\_event\_port\_enqueue\_depth**\ uint8\_t **max\_event\_port\_links**\ int32\_t **max\_num\_events**\ uint32\_t **event\_dev\_cap**\ uint8\_t **max\_single\_link\_event\_port\_queue\_pairs**\ uint8\_t **max\_profiles\_per\_port**\ ## Detailed Description Event device information Definition at line **600** of file **rte\_eventdev.h**. ## Field Documentation ### const char\* driver\_name Event driver name. Definition at line **601** of file **rte\_eventdev.h**. ### struct rte\_device\* dev Device information. Definition at line **602** of file **rte\_eventdev.h**. ### uint32\_t min\_dequeue\_timeout\_ns Minimum global dequeue timeout(ns) supported by this device. Definition at line **603** of file **rte\_eventdev.h**. ### uint32\_t max\_dequeue\_timeout\_ns Maximum global dequeue timeout(ns) supported by this device. Definition at line **605** of file **rte\_eventdev.h**. ### uint32\_t dequeue\_timeout\_ns Configured global dequeue timeout(ns) for this device. Definition at line **607** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_queues Maximum event queues supported by this device. This count excludes any queues covered by **max\_single\_link\_event\_port\_queue\_pairs**. Definition at line **609** of file **rte\_eventdev.h**. ### uint32\_t max\_event\_queue\_flows Maximum number of flows within an event queue supported by this device. Definition at line **614** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_queue\_priority\_levels Maximum number of event queue priority levels supported by this device. Valid when the device has **RTE\_EVENT\_DEV\_CAP\_QUEUE\_QOS** capability. The implementation shall normalize priority values specified between **RTE\_EVENT\_DEV\_PRIORITY\_HIGHEST** and **RTE\_EVENT\_DEV\_PRIORITY\_LOWEST** to map them internally to this range of priorities. \[For devices supporting a power-of-2 number of priority levels, this normalization will be done via a right-shift operation, so only the top log2(max\_levels) bits will be used by the event device.\] **See also** **rte\_event\_queue\_conf.priority** Definition at line **616** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_priority\_levels Maximum number of event priority levels by this device. Valid when the device has **RTE\_EVENT\_DEV\_CAP\_EVENT\_QOS** capability. The implementation shall normalize priority values specified between **RTE\_EVENT\_DEV\_PRIORITY\_HIGHEST** and **RTE\_EVENT\_DEV\_PRIORITY\_LOWEST** to map them internally to this range of priorities. \[For devices supporting a power-of-2 number of priority levels, this normalization will be done via a right-shift operation, so only the top log2(max\_levels) bits will be used by the event device.\] **See also** **rte\_event.priority** Definition at line **630** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_ports Maximum number of event ports supported by this device. This count excludes any ports covered by **max\_single\_link\_event\_port\_queue\_pairs**. Definition at line **644** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_port\_dequeue\_depth Maximum number of events that can be dequeued at a time from an event port on this device. A device that does not support burst dequeue (**RTE\_EVENT\_DEV\_CAP\_BURST\_MODE**) will set this to 1. Definition at line **649** of file **rte\_eventdev.h**. ### uint32\_t max\_event\_port\_enqueue\_depth Maximum number of events that can be enqueued at a time to an event port on this device. A device that does not support burst enqueue (**RTE\_EVENT\_DEV\_CAP\_BURST\_MODE**) will set this to 1. Definition at line **656** of file **rte\_eventdev.h**. ### uint8\_t max\_event\_port\_links Maximum number of queues that can be linked to a single event port on this device. Definition at line **663** of file **rte\_eventdev.h**. ### int32\_t max\_num\_events A *closed system* event dev has a limit on the number of events it can manage at a time. Once the number of events tracked by an eventdev exceeds this number, any enqueues of NEW events will fail. An *open system* event dev does not have a limit and will specify this as -1. Definition at line **666** of file **rte\_eventdev.h**. ### uint32\_t event\_dev\_cap Event device capabilities flags (RTE\_EVENT\_DEV\_CAP\_\*). Definition at line **673** of file **rte\_eventdev.h**. ### uint8\_t max\_single\_link\_event\_port\_queue\_pairs Maximum number of event ports and queues, supported by this device, that are optimized for (and only capable of) single-link configurations. These ports and queues are not accounted for in **max\_event\_ports** or **max\_event\_queues**. Definition at line **675** of file **rte\_eventdev.h**. ### uint8\_t max\_profiles\_per\_port Maximum number of event queue link profiles per event port. A device that doesn't support multiple profiles will set this as 1. Definition at line **681** of file **rte\_eventdev.h**. ## Author Generated automatically by Doxygen for DPDK from the source code.