This patch adds support to configure and use periodic event
timers in software timer adapter.
The structure ``rte_event_timer_adapter_stats`` is extended
by adding a new field, ``evtim_drop_count``. This stat
represents the number of times an event_timer expiry event
is dropped by the event timer adapter.
update the software eventdev pmd timer_adapter_caps_get
callback function to report the support of periodic
event timer capability
Signed-off-by: Naga Harish K S V <s.v.naga.haris...@intel.com>
---
doc/guides/rel_notes/deprecation.rst | 7 --
doc/guides/rel_notes/release_22_11.rst | 3 +
drivers/event/sw/sw_evdev.c | 2 +-
lib/eventdev/eventdev_pmd.h | 3 +
lib/eventdev/rte_event_timer_adapter.c | 106 ++++++++++++++++---------
lib/eventdev/rte_event_timer_adapter.h | 2 +
lib/eventdev/rte_eventdev.c | 6 +-
7 files changed, 84 insertions(+), 45 deletions(-)
diff --git a/doc/guides/rel_notes/deprecation.rst
b/doc/guides/rel_notes/deprecation.rst
index e7583cae4c..fd8ef4dff7 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -186,13 +186,6 @@ Deprecation Notices
Event will be one of the configuration fields,
together with additional vector parameters.
-* eventdev: The structure ``rte_event_timer_adapter_stats`` will be
- extended by adding a new field ``evtim_drop_count``.
- This counter will represent the number of times an event_timer expiry event
- is dropped by the timer adapter.
- This field will be used to add periodic mode support
- to the software timer adapter in DPDK 22.11.
-
* eventdev: The function pointer declaration ``eventdev_stop_flush_t``
will be renamed to ``rte_eventdev_stop_flush_t`` in DPDK 22.11.
diff --git a/doc/guides/rel_notes/release_22_11.rst
b/doc/guides/rel_notes/release_22_11.rst
index c32c18ff49..1bbdd7068a 100644
--- a/doc/guides/rel_notes/release_22_11.rst
+++ b/doc/guides/rel_notes/release_22_11.rst
@@ -94,6 +94,9 @@ API Changes
ABI Changes
-----------
+* eventdev: Added ``evtim_drop_count`` field to
``rte_event_timer_adapter_stats``
+ structure.
+
.. This section should contain ABI changes. Sample format:
* sample: Add a short 1-2 sentence description of the ABI change
diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
index c9efe35bf4..e866150379 100644
--- a/drivers/event/sw/sw_evdev.c
+++ b/drivers/event/sw/sw_evdev.c
@@ -564,7 +564,7 @@ sw_timer_adapter_caps_get(const struct rte_eventdev *dev,
uint64_t flags,
{
RTE_SET_USED(dev);
RTE_SET_USED(flags);
- *caps = 0;
+ *caps = RTE_EVENT_TIMER_ADAPTER_SW_CAP;
/* Use default SW ops */
*ops = NULL;
diff --git a/lib/eventdev/eventdev_pmd.h b/lib/eventdev/eventdev_pmd.h
index f514a37575..085563ff52 100644
--- a/lib/eventdev/eventdev_pmd.h
+++ b/lib/eventdev/eventdev_pmd.h
@@ -81,6 +81,9 @@ extern "C" {
* the ethdev to eventdev use a SW service function
*/
+#define RTE_EVENT_TIMER_ADAPTER_SW_CAP \
+ RTE_EVENT_TIMER_ADAPTER_CAP_PERIODIC
+
#define RTE_EVENTDEV_DETACHED (0)
#define RTE_EVENTDEV_ATTACHED (1)
diff --git a/lib/eventdev/rte_event_timer_adapter.c
b/lib/eventdev/rte_event_timer_adapter.c
index e0d978d641..d2480060c5 100644
--- a/lib/eventdev/rte_event_timer_adapter.c
+++ b/lib/eventdev/rte_event_timer_adapter.c
@@ -53,6 +53,14 @@ static const struct event_timer_adapter_ops swtim_ops;
#define EVTIM_SVC_LOG_DBG(...) (void)0
#endif
+static inline enum rte_timer_type
+get_timer_type(const struct rte_event_timer_adapter *adapter)
+{
+ return (adapter->data->conf.flags &
+ RTE_EVENT_TIMER_ADAPTER_F_PERIODIC) ?
+ PERIODICAL : SINGLE;
+}
+
static int
default_port_conf_cb(uint16_t id, uint8_t event_dev_id, uint8_t *event_port_id,
void *conf_arg)
@@ -195,13 +203,14 @@ rte_event_timer_adapter_create_ext(
adapter->data->conf = *conf; /* copy conf structure */
/* Query eventdev PMD for timer adapter capabilities and ops */
- ret = dev->dev_ops->timer_adapter_caps_get(dev,
- adapter->data->conf.flags,
- &adapter->data->caps,
- &adapter->ops);
- if (ret < 0) {
- rte_errno = -ret;
- goto free_memzone;
+ if (dev->dev_ops->timer_adapter_caps_get) {
+ ret = dev->dev_ops->timer_adapter_caps_get(dev,
+ adapter->data->conf.flags,
+ &adapter->data->caps, &adapter->ops);
+ if (ret < 0) {
+ rte_errno = -ret;
+ goto free_memzone;
+ }
}
if (!(adapter->data->caps &
@@ -348,13 +357,14 @@ rte_event_timer_adapter_lookup(uint16_t adapter_id)
dev = &rte_eventdevs[adapter->data->event_dev_id];
/* Query eventdev PMD for timer adapter capabilities and ops */
- ret = dev->dev_ops->timer_adapter_caps_get(dev,
- adapter->data->conf.flags,
- &adapter->data->caps,
- &adapter->ops);
- if (ret < 0) {
- rte_errno = EINVAL;
- return NULL;
+ if (dev->dev_ops->timer_adapter_caps_get) {
+ ret = dev->dev_ops->timer_adapter_caps_get(dev,
+ adapter->data->conf.flags,
+ &adapter->data->caps, &adapter->ops);
+ if (ret < 0) {
+ rte_errno = EINVAL;
+ return NULL;
+ }
}
/* If eventdev PMD did not provide ops, use default software
@@ -612,35 +622,44 @@ swtim_callback(struct rte_timer *tim)
uint64_t opaque;
int ret;
int n_lcores;
+ enum rte_timer_type type;
opaque = evtim->impl_opaque[1];
adapter = (struct rte_event_timer_adapter *)(uintptr_t)opaque;
sw = swtim_pmd_priv(adapter);
+ type = get_timer_type(adapter);
+
+ if (unlikely(sw->in_use[lcore].v == 0)) {
+ sw->in_use[lcore].v = 1;
+ n_lcores = __atomic_fetch_add(&sw->n_poll_lcores, 1,
+ __ATOMIC_RELAXED);
+ __atomic_store_n(&sw->poll_lcores[n_lcores], lcore,
+ __ATOMIC_RELAXED);
+ }
ret = event_buffer_add(&sw->buffer, &evtim->ev);
if (ret < 0) {
- /* If event buffer is full, put timer back in list with
- * immediate expiry value, so that we process it again on the
- * next iteration.
- */
- ret = rte_timer_alt_reset(sw->timer_data_id, tim, 0, SINGLE,
- lcore, NULL, evtim);
- if (ret < 0) {
- EVTIM_LOG_DBG("event buffer full, failed to reset "
- "timer with immediate expiry value");
+ if (type == SINGLE) {
+ /* If event buffer is full, put timer back in list with
+ * immediate expiry value, so that we process it again
+ * on the next iteration.
+ */
+ ret = rte_timer_alt_reset(sw->timer_data_id, tim, 0,
+ SINGLE, lcore, NULL, evtim);
+ if (ret < 0) {
+ EVTIM_LOG_DBG("event buffer full, failed to "
+ "reset timer with immediate "
+ "expiry value");
+ } else {
+ sw->stats.evtim_retry_count++;
+ EVTIM_LOG_DBG("event buffer full, resetting "
+ "rte_timer with immediate "
+ "expiry value");
+ }
} else {
- sw->stats.evtim_retry_count++;
- EVTIM_LOG_DBG("event buffer full, resetting rte_timer "
- "with immediate expiry value");
+ sw->stats.evtim_drop_count++;
}
- if (unlikely(sw->in_use[lcore].v == 0)) {
- sw->in_use[lcore].v = 1;
- n_lcores = __atomic_fetch_add(&sw->n_poll_lcores, 1,
- __ATOMIC_RELAXED);
- __atomic_store_n(&sw->poll_lcores[n_lcores], lcore,
- __ATOMIC_RELAXED);
- }
} else {
EVTIM_BUF_LOG_DBG("buffered an event timer expiry event");
@@ -654,10 +673,15 @@ swtim_callback(struct rte_timer *tim)
sw->n_expired_timers = 0;
}
- sw->expired_timers[sw->n_expired_timers++] = tim;
+ /* Don't free rte_timer for a periodic event timer until
+ * it is cancelled
+ */
+ if (type == SINGLE)
+ sw->expired_timers[sw->n_expired_timers++] = tim;
sw->stats.evtim_exp_count++;
- __atomic_store_n(&evtim->state, RTE_EVENT_TIMER_NOT_ARMED,
+ if (type == SINGLE)
+ __atomic_store_n(&evtim->state,
RTE_EVENT_TIMER_NOT_ARMED,
__ATOMIC_RELEASE);
}
@@ -947,6 +971,12 @@ swtim_uninit(struct rte_event_timer_adapter *adapter)
swtim_free_tim,
sw);
+ ret = rte_timer_data_dealloc(sw->timer_data_id);
+ if (ret < 0) {
+ EVTIM_LOG_ERR("failed to deallocate timer data instance");
+ return ret;
+ }
+
ret = rte_service_component_unregister(sw->service_id);
if (ret < 0) {
EVTIM_LOG_ERR("failed to unregister service component");
@@ -1053,6 +1083,7 @@ __swtim_arm_burst(const struct rte_event_timer_adapter
*adapter,
/* Timer list for this lcore is not in use. */
uint16_t exp_state = 0;
enum rte_event_timer_state n_state;
+ enum rte_timer_type type = SINGLE;
#ifdef RTE_LIBRTE_EVENTDEV_DEBUG
/* Check that the service is running. */
@@ -1092,6 +1123,9 @@ __swtim_arm_burst(const struct rte_event_timer_adapter
*adapter,
return 0;
}
+ /* update timer type for periodic adapter */
+ type = get_timer_type(adapter);
+
for (i = 0; i < nb_evtims; i++) {
n_state = __atomic_load_n(&evtims[i]->state, __ATOMIC_ACQUIRE);
if (n_state == RTE_EVENT_TIMER_ARMED) {
@@ -1135,7 +1169,7 @@ __swtim_arm_burst(const struct rte_event_timer_adapter
*adapter,
cycles = get_timeout_cycles(evtims[i], adapter);
ret = rte_timer_alt_reset(sw->timer_data_id, tim, cycles,
- SINGLE, lcore_id, NULL, evtims[i]);
+ type, lcore_id, NULL, evtims[i]);
if (ret < 0) {
/* tim was in RUNNING or CONFIG state */
__atomic_store_n(&evtims[i]->state,
diff --git a/lib/eventdev/rte_event_timer_adapter.h
b/lib/eventdev/rte_event_timer_adapter.h
index eab8e59a57..cd10db19e4 100644
--- a/lib/eventdev/rte_event_timer_adapter.h
+++ b/lib/eventdev/rte_event_timer_adapter.h
@@ -193,6 +193,8 @@ struct rte_event_timer_adapter_stats {
/**< Event timer retry count */
uint64_t adapter_tick_count;
/**< Tick count for the adapter, at its resolution */
+ uint64_t evtim_drop_count;
+ /**< event timer expiries dropped */
};
struct rte_event_timer_adapter;
diff --git a/lib/eventdev/rte_eventdev.c b/lib/eventdev/rte_eventdev.c
index 1dc4f966be..59d8b49ef6 100644
--- a/lib/eventdev/rte_eventdev.c
+++ b/lib/eventdev/rte_eventdev.c
@@ -139,7 +139,11 @@ rte_event_timer_adapter_caps_get(uint8_t dev_id, uint32_t
*caps)
if (caps == NULL)
return -EINVAL;
- *caps = 0;
+
+ if (dev->dev_ops->timer_adapter_caps_get == NULL)
+ *caps = RTE_EVENT_TIMER_ADAPTER_SW_CAP;
+ else
+ *caps = 0;
return dev->dev_ops->timer_adapter_caps_get ?
(*dev->dev_ops->timer_adapter_caps_get)(dev,
--
2.25.1
