rte_distributor_single.h - Man Page

#define RTE_DISTRIBUTOR_NAMESIZE   32

struct rte_distributor_single * rte_distributor_create_single (const char *name, unsigned int socket_id, unsigned int num_workers)
int rte_distributor_process_single (struct rte_distributor_single *d, struct rte_mbuf **mbufs, unsigned int num_mbufs)
int rte_distributor_returned_pkts_single (struct rte_distributor_single *d, struct rte_mbuf **mbufs, unsigned int max_mbufs)
int rte_distributor_flush_single (struct rte_distributor_single *d)
void rte_distributor_clear_returns_single (struct rte_distributor_single *d)
struct rte_mbuf * rte_distributor_get_pkt_single (struct rte_distributor_single *d, unsigned int worker_id, struct rte_mbuf *oldpkt)
int rte_distributor_return_pkt_single (struct rte_distributor_single *d, unsigned int worker_id, struct rte_mbuf *mbuf)
void rte_distributor_request_pkt_single (struct rte_distributor_single *d, unsigned int worker_id, struct rte_mbuf *oldpkt)
struct rte_mbuf * rte_distributor_poll_pkt_single (struct rte_distributor_single *d, unsigned int worker_id)

Length of name for instance

Definition at line 20 of file rte_distributor_single.h.

Function to create a new distributor instance

Reserves the memory needed for the distributor operation and initializes the distributor to work with the configured number of workers.

Parameters

name The name to be given to the distributor instance.
socket_id The NUMA node on which the memory is to be allocated
num_workers The maximum number of workers that will request packets from this distributor

Returns

The newly created distributor instance

Process a set of packets by distributing them among workers that request packets. The distributor will ensure that no two packets that have the same flow id, or tag, in the mbuf will be processed at the same time.

The user is advocated to set tag for each mbuf before calling this function. If user doesn't set the tag, the tag value can be various values depending on driver implementation and configuration.

This is not multi-thread safe and should only be called on a single lcore.

Parameters

d The distributor instance to be used
mbufs The mbufs to be distributed
num_mbufs The number of mbufs in the mbufs array

Returns

The number of mbufs processed.

Get a set of mbufs that have been returned to the distributor by workers

This should only be called on the same lcore as rte_distributor_process()

Parameters

d The distributor instance to be used
mbufs The mbufs pointer array to be filled in
max_mbufs The size of the mbufs array

Returns

The number of mbufs returned in the mbufs array.

Flush the distributor component, so that there are no in-flight or backlogged packets awaiting processing

This should only be called on the same lcore as rte_distributor_process()

Parameters

d The distributor instance to be used

Returns

The number of queued/in-flight packets that were completed by this call.

Clears the array of returned packets used as the source for the rte_distributor_returned_pkts() API call.

This should only be called on the same lcore as rte_distributor_process()

Parameters

d The distributor instance to be used

API called by a worker to get a new packet to process. Any previous packet given to the worker is assumed to have completed processing, and may be optionally returned to the distributor via the oldpkt parameter.

Parameters

d The distributor instance to be used
worker_id The worker instance number to use - must be less that num_workers passed at distributor creation time.
oldpkt The previous packet, if any, being processed by the worker

Returns

A new packet to be processed by the worker thread.

API called by a worker to return a completed packet without requesting a new packet, for example, because a worker thread is shutting down

Parameters

d The distributor instance to be used
worker_id The worker instance number to use - must be less that num_workers passed at distributor creation time.
mbuf The previous packet being processed by the worker

API called by a worker to request a new packet to process. Any previous packet given to the worker is assumed to have completed processing, and may be optionally returned to the distributor via the oldpkt parameter. Unlike rte_distributor_get_pkt(), this function does not wait for a new packet to be provided by the distributor.

NOTE: after calling this function, rte_distributor_poll_pkt() should be used to poll for the packet requested. The rte_distributor_get_pkt() API should not be used to try and retrieve the new packet.

Parameters

d The distributor instance to be used
worker_id The worker instance number to use - must be less that num_workers passed at distributor creation time.
oldpkt The previous packet, if any, being processed by the worker

API called by a worker to check for a new packet that was previously requested by a call to rte_distributor_request_pkt(). It does not wait for the new packet to be available, but returns NULL if the request has not yet been fulfilled by the distributor.

Parameters

d The distributor instance to be used
worker_id The worker instance number to use - must be less that num_workers passed at distributor creation time.

Returns

A new packet to be processed by the worker thread, or NULL if no packet is yet available.