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From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
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Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Thu, 29 Jun 2017 19:49:53 +0530
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Subject: [dpdk-dev] [PATCH 2/5] eventdev: introduce specialized enqueue new
op variant
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Introducing the rte_event_enqueue_new_burst() for enabling the
PMD, an optimization opportunity to optimize if all the events in
the enqueue burst has the op type of RTE_EVENT_OP_NEW.
If a PMD does not have any optimization opportunity
for this operation then the PMD can choose the generic enqueue
burst PMD callback as the fallback.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
This patch is based on the following dicussion on ml
http://dpdk.org/ml/archives/dev/2017-June/068859.html
---
drivers/event/octeontx/ssovf_evdev.c | 1 +
drivers/event/sw/sw_evdev.c | 1 +
lib/librte_eventdev/rte_eventdev.h | 51 ++++++++++++++++++++++++++++++++++++
3 files changed, 53 insertions(+)
diff --git a/drivers/event/octeontx/ssovf_evdev.c b/drivers/event/octeontx/ssovf_evdev.c
index 8dc7b2ef8..0d0c6a186 100644
--- a/drivers/event/octeontx/ssovf_evdev.c
+++ b/drivers/event/octeontx/ssovf_evdev.c
@@ -158,6 +158,7 @@ ssovf_fastpath_fns_set(struct rte_eventdev *dev)
dev->schedule = NULL;
dev->enqueue = ssows_enq;
dev->enqueue_burst = ssows_enq_burst;
+ dev->enqueue_new_burst = ssows_enq_burst;
dev->dequeue = ssows_deq;
dev->dequeue_burst = ssows_deq_burst;
diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
index fe2a61e2f..951ad1b33 100644
--- a/drivers/event/sw/sw_evdev.c
+++ b/drivers/event/sw/sw_evdev.c
@@ -796,6 +796,7 @@ sw_probe(struct rte_vdev_device *vdev)
dev->dev_ops = &evdev_sw_ops;
dev->enqueue = sw_event_enqueue;
dev->enqueue_burst = sw_event_enqueue_burst;
+ dev->enqueue_new_burst = sw_event_enqueue_burst;
dev->dequeue = sw_event_dequeue;
dev->dequeue_burst = sw_event_dequeue_burst;
dev->schedule = sw_event_schedule;
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index c4d623a62..132f75fda 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -1065,6 +1065,8 @@ struct rte_eventdev {
/**< Pointer to PMD enqueue function. */
event_enqueue_burst_t enqueue_burst;
/**< Pointer to PMD enqueue burst function. */
+ event_enqueue_burst_t enqueue_new_burst;
+ /**< Pointer to PMD enqueue burst function(op new variant) */
event_dequeue_t dequeue;
/**< Pointer to PMD dequeue function. */
event_dequeue_burst_t dequeue_burst;
@@ -1181,6 +1183,55 @@ rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id,
}
/**
+ * Enqueue a burst of events objects of operation type *RTE_EVENT_OP_NEW* on
+ * an event device designated by its *dev_id* through the event port specified
+ * by *port_id*.
+ *
+ * Provides the same functionality as rte_event_enqueue_burst(), expect that
+ * application can use this API when the all objects in the burst contains
+ * the enqueue operation of the type *RTE_EVENT_OP_NEW*. This specialized
+ * function can provide the additional hint to the PMD and optimize if possible.
+ *
+ * The rte_event_enqueue_new_burst() result is undefined if the enqueue burst
+ * has event object of operation type != RTE_EVENT_OP_NEW.
+ *
+ * @param dev_id
+ * The identifier of the device.
+ * @param port_id
+ * The identifier of the event port.
+ * @param ev
+ * Points to an array of *nb_events* objects of type *rte_event* structure
+ * which contain the event object enqueue operations to be processed.
+ * @param nb_events
+ * The number of event objects to enqueue, typically number of
+ * rte_event_port_enqueue_depth() available for this port.
+ *
+ * @return
+ * The number of event objects actually enqueued on the event device. The
+ * return value can be less than the value of the *nb_events* parameter when
+ * the event devices queue is full or if invalid parameters are specified in a
+ * *rte_event*. If the return value is less than *nb_events*, the remaining
+ * events at the end of ev[] are not consumed and the caller has to take care
+ * of them, and rte_errno is set accordingly. Possible errno values include:
+ * - -EINVAL The port ID is invalid, device ID is invalid, an event's queue
+ * ID is invalid, or an event's sched type doesn't match the
+ * capabilities of the destination queue.
+ * - -ENOSPC The event port was backpressured and unable to enqueue
+ * one or more events. This error code is only applicable to
+ * closed systems.
+ * @see rte_event_port_enqueue_depth() rte_event_enqueue_burst()
+ */
+static inline uint16_t
+rte_event_enqueue_new_burst(uint8_t dev_id, uint8_t port_id,
+ const struct rte_event ev[], uint16_t nb_events)
+{
+ const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
+
+ return __rte_event_enqueue_burst(dev_id, port_id, ev, nb_events,
+ dev->enqueue_new_burst);
+}
+
+/**
* Converts nanoseconds to *timeout_ticks* value for rte_event_dequeue_burst()
*
* If the device is configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT flag
--
2.13.2