[dpdk-dev] [PATCH v3 1/5] eventdev/rx_adapter: add event buffer size configurability
Jerin Jacob
jerinjacobk at gmail.com
Thu Oct 7 10:51:38 CEST 2021
On Wed, Sep 22, 2021 at 8:44 PM Naga Harish K S V
<s.v.naga.harish.k at intel.com> wrote:
>
> Currently event buffer is static array with a default size defined
> internally.
>
> To configure event buffer size from application,
> ``rte_event_eth_rx_adapter_create_with_params`` api is added which
> takes ``struct rte_event_eth_rx_adapter_params`` to configure event
> buffer size in addition other params . The event buffer size is
> rounded up for better buffer utilization and performance . In case
> of NULL params argument, default event buffer size is used.
>
> Signed-off-by: Naga Harish K S V <s.v.naga.harish.k at intel.com>
> Signed-off-by: Ganapati Kundapura <ganapati.kundapura at intel.com>
Acked-by: Jerin Jacob <jerinj at marvell.com>
>
> ---
> v3:
> * updated documentation and code comments as per review comments.
> * updated new create api test case name with suitable one.
>
> v2:
> * Updated header file and rx adapter documentation as per review comments.
> * new api name is modified as rte_event_eth_rx_adapter_create_with_params
> as per review comments.
> * rxa_params pointer argument Value NULL is allowed to represent the
> default values
>
> v1:
> * Initial implementation with documentation and unit tests.
> ---
> .../prog_guide/event_ethernet_rx_adapter.rst | 7 ++
> lib/eventdev/rte_event_eth_rx_adapter.c | 98 +++++++++++++++++--
> lib/eventdev/rte_event_eth_rx_adapter.h | 41 +++++++-
> lib/eventdev/version.map | 2 +
> 4 files changed, 140 insertions(+), 8 deletions(-)
>
> diff --git a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
> index 0780b6f711..dd753613bd 100644
> --- a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
> +++ b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
> @@ -62,6 +62,13 @@ service function and needs to create an event port for it. The callback is
> expected to fill the ``struct rte_event_eth_rx_adapter_conf structure``
> passed to it.
>
> +If the application desires to control the event buffer size, it can use the
> +``rte_event_eth_rx_adapter_create_with_params()`` api. The event buffer size is
> +specified using ``struct rte_event_eth_rx_adapter_params::event_buf_size``.
> +The function is passed the event device to be associated with the adapter
> +and port configuration for the adapter to setup an event port if the
> +adapter needs to use a service function.
> +
> Adding Rx Queues to the Adapter Instance
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> diff --git a/lib/eventdev/rte_event_eth_rx_adapter.c b/lib/eventdev/rte_event_eth_rx_adapter.c
> index f2dc69503d..7dec9a8734 100644
> --- a/lib/eventdev/rte_event_eth_rx_adapter.c
> +++ b/lib/eventdev/rte_event_eth_rx_adapter.c
> @@ -82,7 +82,9 @@ struct rte_eth_event_enqueue_buffer {
> /* Count of events in this buffer */
> uint16_t count;
> /* Array of events in this buffer */
> - struct rte_event events[ETH_EVENT_BUFFER_SIZE];
> + struct rte_event *events;
> + /* size of event buffer */
> + uint16_t events_size;
> /* Event enqueue happens from head */
> uint16_t head;
> /* New packets from rte_eth_rx_burst is enqued from tail */
> @@ -919,7 +921,7 @@ rxa_buffer_mbufs(struct rte_event_eth_rx_adapter *rx_adapter,
> dropped = 0;
> nb_cb = dev_info->cb_fn(eth_dev_id, rx_queue_id,
> buf->last |
> - (RTE_DIM(buf->events) & ~buf->last_mask),
> + (buf->events_size & ~buf->last_mask),
> buf->count >= BATCH_SIZE ?
> buf->count - BATCH_SIZE : 0,
> &buf->events[buf->tail],
> @@ -945,7 +947,7 @@ rxa_pkt_buf_available(struct rte_eth_event_enqueue_buffer *buf)
> uint32_t nb_req = buf->tail + BATCH_SIZE;
>
> if (!buf->last) {
> - if (nb_req <= RTE_DIM(buf->events))
> + if (nb_req <= buf->events_size)
> return true;
>
> if (buf->head >= BATCH_SIZE) {
> @@ -2164,12 +2166,15 @@ rxa_ctrl(uint8_t id, int start)
> return 0;
> }
>
> -int
> -rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
> - rte_event_eth_rx_adapter_conf_cb conf_cb,
> - void *conf_arg)
> +static int
> +rxa_create(uint8_t id, uint8_t dev_id,
> + struct rte_event_eth_rx_adapter_params *rxa_params,
> + rte_event_eth_rx_adapter_conf_cb conf_cb,
> + void *conf_arg)
> {
> struct rte_event_eth_rx_adapter *rx_adapter;
> + struct rte_eth_event_enqueue_buffer *buf;
> + struct rte_event *events;
> int ret;
> int socket_id;
> uint16_t i;
> @@ -2184,6 +2189,7 @@ rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
>
> RTE_EVENT_ETH_RX_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
> RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
> +
> if (conf_cb == NULL)
> return -EINVAL;
>
> @@ -2231,11 +2237,30 @@ rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
> rte_free(rx_adapter);
> return -ENOMEM;
> }
> +
> rte_spinlock_init(&rx_adapter->rx_lock);
> +
> for (i = 0; i < RTE_MAX_ETHPORTS; i++)
> rx_adapter->eth_devices[i].dev = &rte_eth_devices[i];
>
> + /* Rx adapter event buffer allocation */
> + buf = &rx_adapter->event_enqueue_buffer;
> + buf->events_size = RTE_ALIGN(rxa_params->event_buf_size, BATCH_SIZE);
> +
> + events = rte_zmalloc_socket(rx_adapter->mem_name,
> + buf->events_size * sizeof(*events),
> + 0, socket_id);
> + if (events == NULL) {
> + RTE_EDEV_LOG_ERR("Failed to allocate mem for event buffer\n");
> + rte_free(rx_adapter->eth_devices);
> + rte_free(rx_adapter);
> + return -ENOMEM;
> + }
> +
> + rx_adapter->event_enqueue_buffer.events = events;
> +
> event_eth_rx_adapter[id] = rx_adapter;
> +
> if (conf_cb == rxa_default_conf_cb)
> rx_adapter->default_cb_arg = 1;
> rte_eventdev_trace_eth_rx_adapter_create(id, dev_id, conf_cb,
> @@ -2243,6 +2268,61 @@ rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
> return 0;
> }
>
> +int
> +rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
> + rte_event_eth_rx_adapter_conf_cb conf_cb,
> + void *conf_arg)
> +{
> + struct rte_event_eth_rx_adapter_params rxa_params;
> +
> + /* use default values for adapter params */
> + rxa_params.event_buf_size = ETH_EVENT_BUFFER_SIZE;
> +
> + return rxa_create(id, dev_id, &rxa_params, conf_cb, conf_arg);
> +}
> +
> +int
> +rte_event_eth_rx_adapter_create_with_params(uint8_t id, uint8_t dev_id,
> + struct rte_event_port_conf *port_config,
> + struct rte_event_eth_rx_adapter_params *rxa_params)
> +{
> + struct rte_event_port_conf *pc;
> + int ret;
> + struct rte_event_eth_rx_adapter_params temp_params = {0};
> +
> + if (port_config == NULL)
> + return -EINVAL;
> +
> + /* use default values if rxa_parmas is NULL */
> + if (rxa_params == NULL) {
> + rxa_params = &temp_params;
> + rxa_params->event_buf_size = ETH_EVENT_BUFFER_SIZE;
> + }
> +
> + if (rxa_params->event_buf_size == 0)
> + return -EINVAL;
> +
> + pc = rte_malloc(NULL, sizeof(*pc), 0);
> + if (pc == NULL)
> + return -ENOMEM;
> +
> + *pc = *port_config;
> +
> + /* adjust event buff size with BATCH_SIZE used for fetching packets
> + * from NIC rx queues to get full buffer utilization and prevent
> + * unnecessary rollovers.
> + */
> + rxa_params->event_buf_size = RTE_ALIGN(rxa_params->event_buf_size,
> + BATCH_SIZE);
> + rxa_params->event_buf_size += BATCH_SIZE + BATCH_SIZE;
> +
> + ret = rxa_create(id, dev_id, rxa_params, rxa_default_conf_cb, pc);
> + if (ret)
> + rte_free(pc);
> +
> + return ret;
> +}
> +
> int
> rte_event_eth_rx_adapter_create(uint8_t id, uint8_t dev_id,
> struct rte_event_port_conf *port_config)
> @@ -2252,12 +2332,14 @@ rte_event_eth_rx_adapter_create(uint8_t id, uint8_t dev_id,
>
> if (port_config == NULL)
> return -EINVAL;
> +
> RTE_EVENT_ETH_RX_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
>
> pc = rte_malloc(NULL, sizeof(*pc), 0);
> if (pc == NULL)
> return -ENOMEM;
> *pc = *port_config;
> +
> ret = rte_event_eth_rx_adapter_create_ext(id, dev_id,
> rxa_default_conf_cb,
> pc);
> @@ -2286,6 +2368,7 @@ rte_event_eth_rx_adapter_free(uint8_t id)
> if (rx_adapter->default_cb_arg)
> rte_free(rx_adapter->conf_arg);
> rte_free(rx_adapter->eth_devices);
> + rte_free(rx_adapter->event_enqueue_buffer.events);
> rte_free(rx_adapter);
> event_eth_rx_adapter[id] = NULL;
>
> @@ -2658,6 +2741,7 @@ rte_event_eth_rx_adapter_stats_get(uint8_t id,
>
> stats->rx_packets += dev_stats_sum.rx_packets;
> stats->rx_enq_count += dev_stats_sum.rx_enq_count;
> +
> return 0;
> }
>
> diff --git a/lib/eventdev/rte_event_eth_rx_adapter.h b/lib/eventdev/rte_event_eth_rx_adapter.h
> index 3f8b362295..6e8b3085f8 100644
> --- a/lib/eventdev/rte_event_eth_rx_adapter.h
> +++ b/lib/eventdev/rte_event_eth_rx_adapter.h
> @@ -26,6 +26,7 @@
> * The ethernet Rx event adapter's functions are:
> * - rte_event_eth_rx_adapter_create_ext()
> * - rte_event_eth_rx_adapter_create()
> + * - rte_event_eth_rx_adapter_create_with_params()
> * - rte_event_eth_rx_adapter_free()
> * - rte_event_eth_rx_adapter_queue_add()
> * - rte_event_eth_rx_adapter_queue_del()
> @@ -36,7 +37,7 @@
> *
> * The application creates an ethernet to event adapter using
> * rte_event_eth_rx_adapter_create_ext() or rte_event_eth_rx_adapter_create()
> - * functions.
> + * or rte_event_eth_rx_adapter_create_with_params() functions.
> * The adapter needs to know which ethernet rx queues to poll for mbufs as well
> * as event device parameters such as the event queue identifier, event
> * priority and scheduling type that the adapter should use when constructing
> @@ -256,6 +257,17 @@ struct rte_event_eth_rx_adapter_vector_limits {
> */
> };
>
> +/**
> + * A structure to hold adapter config params
> + */
> +struct rte_event_eth_rx_adapter_params {
> + uint16_t event_buf_size;
> + /**< size of event buffer for the adapter.
> + * This value is rounded up for better buffer utilization
> + * and performance.
> + */
> +};
> +
> /**
> *
> * Callback function invoked by the SW adapter before it continues
> @@ -356,6 +368,33 @@ int rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
> int rte_event_eth_rx_adapter_create(uint8_t id, uint8_t dev_id,
> struct rte_event_port_conf *port_config);
>
> +/**
> + * This is a variant of rte_event_eth_rx_adapter_create() with additional
> + * adapter params specified in ``struct rte_event_eth_rx_adapter_params``.
> + *
> + * @param id
> + * The identifier of the ethernet Rx event adapter.
> + *
> + * @param dev_id
> + * The identifier of the event device to configure.
> + *
> + * @param port_config
> + * Argument of type *rte_event_port_conf* that is passed to the conf_cb
> + * function.
> + *
> + * @param rxa_params
> + * Pointer to struct rte_event_eth_rx_adapter_params.
> + * In case of NULL, default values are used.
> + *
> + * @return
> + * - 0: Success
> + * - <0: Error code on failure
> + */
> +__rte_experimental
> +int rte_event_eth_rx_adapter_create_with_params(uint8_t id, uint8_t dev_id,
> + struct rte_event_port_conf *port_config,
> + struct rte_event_eth_rx_adapter_params *rxa_params);
> +
> /**
> * Free an event adapter
> *
> diff --git a/lib/eventdev/version.map b/lib/eventdev/version.map
> index cd86d2d908..87586de879 100644
> --- a/lib/eventdev/version.map
> +++ b/lib/eventdev/version.map
> @@ -138,6 +138,8 @@ EXPERIMENTAL {
> __rte_eventdev_trace_port_setup;
> # added in 20.11
> rte_event_pmd_pci_probe_named;
> + # added in 21.11
> + rte_event_eth_rx_adapter_create_with_params;
>
> #added in 21.05
> rte_event_vector_pool_create;
> --
> 2.25.1
>
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