diff mbox

[dpdk-dev,RFC,v4,1/4] eventtimer: introduce event timer adapter

Message ID 1511890808-6072-2-git-send-email-erik.g.carrillo@intel.com (mailing list archive)
State Superseded, archived
Headers show

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Carrillo, Erik G Nov. 28, 2017, 5:40 p.m. UTC
Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
---
 doc/api/doxy-api-index.md                     |   1 +
 lib/librte_eventdev/Makefile                  |   1 +
 lib/librte_eventdev/rte_event_timer_adapter.h | 427 ++++++++++++++++++++++++++
 lib/librte_eventdev/rte_eventdev.h            |   4 +-
 4 files changed, 431 insertions(+), 2 deletions(-)
 create mode 100644 lib/librte_eventdev/rte_event_timer_adapter.h

Comments

Pavan Nikhilesh Nov. 29, 2017, 10:29 a.m. UTC | #1
On Tue, Nov 28, 2017 at 11:40:05AM -0600, Erik Gabriel Carrillo wrote:
>  # versioning export map
>  EXPORT_MAP := rte_eventdev_version.map
> diff --git a/lib/librte_eventdev/rte_event_timer_adapter.h b/lib/librte_eventdev/rte_event_timer_adapter.h
> new file mode 100644
> index 0000000..14661b5
> --- /dev/null
> +++ b/lib/librte_eventdev/rte_event_timer_adapter.h
> @@ -0,0 +1,427 @@
> +/*-
> + *   BSD LICENSE
> + *
> + *   Copyright(c) 2017 Intel Corporation. All rights reserved.
Please add dual licensing here with reference to [1]

> + *
> + *   Redistribution and use in source and binary forms, with or without
> + *   modification, are permitted provided that the following conditions
> + *   are met:
> + *
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * Redistributions in binary form must reproduce the above copyright
> + *       notice, this list of conditions and the following disclaimer in
> + *       the documentation and/or other materials provided with the
> + *       distribution.
> + *     * Neither the name of Intel Corporation nor the names of its
> + *       contributors may be used to endorse or promote products derived
> + *       from this software without specific prior written permission.
> + *
> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +#ifndef __RTE_EVENT_TIMER_ADAPTER_H__
> +#define __RTE_EVENT_TIMER_ADAPTER_H__
> +
> +/**
> + * @file
> + *
> + * RTE Event Timer Adapter
> + *
> + * TODO: description
Addin the description from the proposed RFC[1]


<snip>
> +/**
> + * Event timer state.
> + */
> +enum rte_event_timer_state {
> +	RTE_EVENT_TIMER_NOT_ARMED = 0,
> +	/**< Event timer is in not armed state.*/
> +	RTE_EVENT_TIMER_ARMED = 1,
Add a state to indicate TIMER_CANCELLED as per [1]
> +	/**< Event timer successfully armed.*/
> +	RTE_EVENT_TIMER_ERROR = -1,
> +	/**< Generic event timer error.*/
> +	RTE_EVENT_TIMER_ERROR_TOOEARLY = -2,
> +	/**< Event timer timeout tick is too little to add to the adapter. */
> +	RTE_EVENT_TIMER_ERROR_TOOLATE = -3,
> +	/**< Event timer timeout tick is greater than the maximum timeout.*/
> +};
> +

[1] http://dpdk.org/ml/archives/dev/2017-August/072981.html

-Pavan
diff mbox

Patch

diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index 3492702..3110658 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -46,6 +46,7 @@  The public API headers are grouped by topics:
   [security]           (@ref rte_security.h),
   [eventdev]           (@ref rte_eventdev.h),
   [event_eth_rx_adapter]   (@ref rte_event_eth_rx_adapter.h),
+  [event_timer_adapter]    (@ref rte_event_timer_adapter.h),
   [metrics]            (@ref rte_metrics.h),
   [bitrate]            (@ref rte_bitrate.h),
   [latency]            (@ref rte_latencystats.h),
diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index 5ac22cd..6ef7c1c 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -53,6 +53,7 @@  SYMLINK-y-include += rte_eventdev_pmd_pci.h
 SYMLINK-y-include += rte_eventdev_pmd_vdev.h
 SYMLINK-y-include += rte_event_ring.h
 SYMLINK-y-include += rte_event_eth_rx_adapter.h
+SYMLINK-y-include += rte_event_timer_adapter.h
 
 # versioning export map
 EXPORT_MAP := rte_eventdev_version.map
diff --git a/lib/librte_eventdev/rte_event_timer_adapter.h b/lib/librte_eventdev/rte_event_timer_adapter.h
new file mode 100644
index 0000000..14661b5
--- /dev/null
+++ b/lib/librte_eventdev/rte_event_timer_adapter.h
@@ -0,0 +1,427 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __RTE_EVENT_TIMER_ADAPTER_H__
+#define __RTE_EVENT_TIMER_ADAPTER_H__
+
+/**
+ * @file
+ *
+ * RTE Event Timer Adapter
+ *
+ * TODO: description
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_spinlock.h>
+#include <rte_memory.h>
+
+#include "rte_eventdev.h"
+
+#define RTE_EVENT_TIMER_ADAPTER_NUM_MAX 64
+
+/**
+ * Timer adapter clock source
+ */
+enum rte_event_timer_adapter_clk_src {
+	RTE_EVENT_TIMER_ADAPTER_CPU_CLK,
+	/**< Use CPU clock as the clock source. */
+	RTE_EVENT_TIMER_ADAPTER_EXT_CLK0,
+	/**< Platform dependent external clock source 0. */
+	RTE_EVENT_TIMER_ADAPTER_EXT_CLK1,
+	/**< Platform dependent external clock source 1. */
+	RTE_EVENT_TIMER_ADAPTER_EXT_CLK2,
+	/**< Platform dependent external clock source 2. */
+	RTE_EVENT_TIMER_ADAPTER_EXT_CLK3,
+	/**< Platform dependent external clock source 3. */
+};
+
+#define RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES	(1ULL << 0)
+/**< The event timer adapter implementation may have constraints on the
+ * resolution (timer_tick_ns) and maximum timer expiry timeout(max_tmo_ns)
+ * based on the given timer adapter or system.  If this flag is set, the
+ * implementation adjusts the resolution and maximum timeout to the best
+ * possible configuration. On successful timer adapter creation, the
+ * application can get the configured resolution and max timeout with
+ * ``rte_event_timer_adapter_get_info()``.
+ */
+#define RTE_EVENT_TIMER_ADAPTER_F_SP_PUT	(1ULL << 1)
+/**< ``rte_event_timer_arm_burst()`` API to be used in single producer mode.
+ *
+ * @see struct rte_event_timer_adapter_conf::flags
+ */
+
+/*
+ * Timer adapter configuration structure
+ */
+struct rte_event_timer_adapter_conf {
+	uint8_t event_dev_id;
+	/**< Event device identifier */
+	uint16_t timer_adapter_id;
+	/**< Event timer adapter identifier */
+	uint32_t socket_id;
+	/**< Identifer of socket from which to allocate memory for adapter */
+	enum rte_event_timer_adapter_clk_src clk_src;
+	/**< Clock source for timer adapter */
+	uint64_t timer_tick_ns;
+	/**< Timer adapter resolution in ns */
+	uint64_t max_tmo_ns;
+	/**< Maximum timer timeout(expiry) in ns */
+	uint64_t nb_timers;
+	/**< Total number of timers per adapter */
+	uint64_t flags;
+	/**< Timer adapter config flags (RTE_EVENT_TIMER_ADAPTER_F_*) */
+};
+
+struct rte_event_timer_adapter;
+
+/*
+ * Callback function type for producer port creation.
+ */
+typedef int (*rte_event_timer_adapter_port_conf_cb_t)(uint16_t id,
+						      uint8_t event_dev_id,
+						      uint8_t *event_port_id,
+						      void *conf_arg);
+
+/*
+ * Create an event timer adapter.
+ *
+ * This function must be invoked first before any other function in the API.
+ *
+ * @param conf
+ *   The event timer adapter configuration structure.
+ *
+ * @return
+ *   A pointer to the new allocated event timer adapter on success.
+ *   NULL on error with rte_errno set appropriately.
+ *   Possible rte_errno values include:
+ *   - ERANGE: timer_tick_ns is not in supported range.
+ */
+struct rte_event_timer_adapter *rte_event_timer_adapter_create(
+			const struct rte_event_timer_adapter_conf *conf);
+
+/*
+ * Create a timer adapter with the supplied callback.
+ *
+ * This function can be used to have a more granular control over the timer
+ * adapter creation.  If a built-in port is absent, then the function uses the
+ * callback provided to create and get the port id to be used as a producer
+ * port.
+ *
+ * @param conf
+ *   The timer adapter configuration structure
+ * @param conf_cb
+ *   The port config callback function.
+ * @param conf_arg
+ *   Opaque pointer to the argument for the callback function
+ * @param id_ptr[out]
+ *   Address of variable to store adapter identifier in
+ *
+ * @return
+ *   A pointer to the new allocated event timer adapter on success.
+ *   NULL on error with rte_errno set appropriately.
+ *   Possible rte_errno values include:
+ *   - ERANGE: timer_tick_ns is not in supported range.
+ *   - ENOMEM: unable to allocate sufficient memory for adapter instances
+ *   - EINVAL: invalid event device identifier specified in config
+ *   - ENOSPC: maximum number of adapters already created
+ */
+struct rte_event_timer_adapter *rte_event_timer_adapter_create_ext(
+			const struct rte_event_timer_adapter_conf *conf,
+			rte_event_timer_adapter_port_conf_cb_t conf_cb,
+			void *conf_arg);
+
+/*
+ * Timer adapter info structure.
+ */
+struct rte_event_timer_adapter_info {
+	uint64_t min_resolution_ns;
+	/**< Minimum timer adapter resolution in ns */
+	uint64_t max_tmo_ns;
+	/**< Maximum timer timeout(expire) in ns */
+	struct rte_event_timer_adapter_conf conf;
+	/**< Configured timer adapter attributes */
+	uint32_t caps;
+	/**< Event timer adapter capabilities */
+	int16_t event_dev_port_id;
+	/**< Event device port ID, if applicable */
+	int32_t service_id;
+	/**< Service ID, if applicable */
+};
+
+/**
+ * Retrieve the contextual information of an event timer adapter.
+ *
+ * @param adapter
+ *   A pointer to the event timer adapter structure.
+ *
+ * @param[out] adapter_info
+ *   A pointer to a structure of type *rte_event_timer_adapter_info* to be
+ *   filled with the contextual information of the adapter.
+ *
+ * @return
+ *   - 0: Success, driver updates the contextual information of the
+ *   timer adapter
+ *   - <0: Error code returned by the driver info get function.
+ *   - -EINVAL if adapter identifier invalid
+ *
+ * @see RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES,
+ *   struct rte_event_timer_adapter_info
+ *
+ */
+int rte_event_timer_adapter_get_info(
+		const struct rte_event_timer_adapter *adapter,
+		struct rte_event_timer_adapter_info *adapter_info);
+
+/**
+ * Start a timer adapter.
+ *
+ * The adapter start step is the last one and consists of setting the timer
+ * adapter to start accepting the timers and schedules to event queues.
+ *
+ * On success, all basic functions exported by the API (timer arm,
+ * timer cancel and so on) can be invoked.
+ *
+ * @param adapter
+ *   A pointer to the event timer adapter structure.
+ *
+ * @return
+ *   - 0: Success, adapter started.
+ *   - <0: Error code returned by the driver start function.
+ *   - -EINVAL if adapter identifier invalid
+ */
+int rte_event_timer_adapter_start(
+		const struct rte_event_timer_adapter *adapter);
+
+/**
+ * Stop an event timer adapter.
+ *
+ * The adapter can be restarted with a call to
+ * ``rte_event_timer_adapter_start()``.
+ *
+ * @param adapter
+ *   A pointer to the event timer adapter structure.
+ *
+ * @return
+ *   - 0: Success, adapter stopped.
+ *   - <0: Error code returned by the driver stop function.
+ *   - -EINVAL if adapter identifier invalid
+ */
+int rte_event_timer_adapter_stop(const struct rte_event_timer_adapter *adapter);
+
+/*
+ * Lookup an event timer adapter using its identifier.
+ *
+ * If an event timer adapter was created in another process with the same
+ * identifier, this function will locate its state and set up access to it
+ * so that it can be used in this process.
+ *
+ * @param adapter_id
+ *  The event timer adapter identifier.
+ *
+ * @return
+ *  A pointer to the event timer adapter matching the identifier on success.
+ *  NULL on error with rte_errno set appropriately.
+ *  Possible rte_errno values include:
+ *   - ENOENT - required entry not available to return.
+ */
+struct rte_event_timer_adapter *rte_event_timer_adapter_lookup(
+							uint16_t adapter_id);
+
+/*
+ * Free an event timer adapter.
+ *
+ * Destroy an event timer adapter, freeing all resources.
+ *
+ * Before invoking this function, the application must wait for all the
+ * armed timers to expire or cancel the outstanding armed timers.
+ *
+ * @param adapter
+ *   A pointer to an event timer adapter structure.
+ *
+ * @return
+ *   - 0: Successfully freed the event timer adapter resources.
+ *   - <0: Failed to free the event timer adapter resources.
+ *   - -EAGAIN:  adapter is busy; timers outstanding
+ *   - -EBUSY: stop hasn't been called for this adapter yet
+ *   - -EINVAL: adapter id invalid, or adapter invalid
+ */
+int rte_event_timer_adapter_free(struct rte_event_timer_adapter *adapter);
+
+/**
+ * Event timer state.
+ */
+enum rte_event_timer_state {
+	RTE_EVENT_TIMER_NOT_ARMED = 0,
+	/**< Event timer is in not armed state.*/
+	RTE_EVENT_TIMER_ARMED = 1,
+	/**< Event timer successfully armed.*/
+	RTE_EVENT_TIMER_ERROR = -1,
+	/**< Generic event timer error.*/
+	RTE_EVENT_TIMER_ERROR_TOOEARLY = -2,
+	/**< Event timer timeout tick is too little to add to the adapter. */
+	RTE_EVENT_TIMER_ERROR_TOOLATE = -3,
+	/**< Event timer timeout tick is greater than the maximum timeout.*/
+};
+
+/**
+ * The generic *rte_event_timer* structure to hold the event timer attributes
+ * for arm and cancel operations.
+ */
+RTE_STD_C11
+struct rte_event_timer {
+	struct rte_event ev;
+	/**<
+	 * Expiry event attributes.  On successful event timer timeout,
+	 * the following attributes will be used to inject the expiry event to
+	 * the eventdev:
+	 *  - event_queue_id: Targeted event queue id for expiry events.
+	 *  - event_priority: Event priority of the event expiry event in the
+	 *  event queue relative to other events.
+	 *  - sched_type: Scheduling type of the expiry event.
+	 *  - flow_id: Flow id of the expiry event.
+	 *  - op: RTE_EVENT_OP_NEW
+	 *  - event_type: RTE_EVENT_TYPE_TIMER
+	 */
+	enum rte_event_timer_state state;
+	/**< State of the event timer. */
+	uint64_t timeout_ticks;
+	/**< Expiry timer ticks expressed in number of *timer_ticks_ns* from
+	 * now.
+	 * @see struct rte_event_timer_adapter_info::adapter_conf::timer_tick_ns
+	 */
+	uint64_t impl_opaque[2];
+	/**< Implementation-specific opaque data.
+	 * An event timer adapter implementation use this field to hold
+	 * implementation specific values to share between the arm and cancel
+	 * operations.  The application should not modify this field.
+	 */
+	uint8_t user_meta[];
+	/**< Memory to store user specific metadata.
+	 * The event timer adapter implementation should not modify this area.
+	 */
+} __rte_cache_aligned;
+
+/**
+ * Arm a burst of event timers with separate expiration timeout tick for each
+ * event timer.
+ *
+ * Before calling this function, the application allocates
+ * ``struct rte_event_timer`` objects from mempool or huge page backed
+ * application buffers of desired size. On successful allocation,
+ * application updates the `struct rte_event_timer`` attributes such as
+ * expiry event attributes, timeout ticks from now.
+ * This function submits the event timer arm requests to the event timer adapter
+ * and on expiry, the events will be injected to designated event queue.
+ *
+ * @param adapter
+ *   A pointer to an event timer adapter structure.
+ * @param event_timers
+ *   Pointer to an array of objects of type *rte_event_timer* structure.
+ * @param nb_event_timers
+ *   Number of event timers in the supplied array.
+ *
+ * @return
+ *   The number of successfully armed event timers. The return value can be less
+ *   than the value of the *nb_timers* parameter. If the return value is less
+ *   than *nb_events*, the remaining event timers at the end of *tim*
+ *   are not consumed, and the caller has to take care of them, and rte_errno
+ *   is set accordingly. Possible errno values include:
+ *   - -EINVAL  Invalid timer adapter identifier, expiry event queue ID is
+ *   invalid, or an expiry event's sched type doesn't match the capabilities of
+ *   the destination event queue.
+ *   - -EAGAIN Specified timer adapter is not running
+ */
+int rte_event_timer_arm_burst(const struct rte_event_timer_adapter *adapter,
+			      struct rte_event_timer **event_timers,
+			      uint16_t nb_event_timers);
+
+/**
+ * Arm a burst of event timers with same expiration timeout tick.
+ *
+ * Provides the same functionality as ``rte_event_timer_arm_burst()``, except
+ * that application can use this API when all the event timers have the
+ * same timeout expiration tick. This specialized function can provide the
+ * additional hint to the adapter implementation and optimize if possible.
+ *
+ * @param adapter
+ *   A pointer to an event timer adapter structure.
+ * @param event_timers
+ *   Points to an array of objects of type *rte_event_timer* structure.
+ * @param timeout_ticks
+ *   The number of ticks in which the timers should expire.
+ * @param nb_event_timers
+ *   Number of event timers in the supplied array.
+ *
+ * @return
+ *   The number of successfully armed event timers. The return value can be less
+ *   than the value of the *nb_timers* parameter. If the return value is less
+ *   than *nb_events*, the remaining event timers at the end of *tim*
+ *   are not consumed, and the caller has to take care of them, and rte_errno
+ *   is set accordingly. Possible errno values include:
+ *   - -EINVAL  Invalid timer adapter identifier, expiry event queue ID is
+ *   invalid, or an expiry event's sched type doesn't match the capabilities of
+ *   the destination event queue.
+ *   - -EAGAIN Specified event timer adapter is not running
+ */
+int rte_event_timer_arm_tmo_tick_burst(
+			const struct rte_event_timer_adapter *adapter,
+			struct rte_event_timer **event_timers,
+			const uint64_t timeout_ticks,
+			const uint16_t nb_event_timers);
+
+/**
+ * Cancel a burst of event timer from being scheduled to the event device.
+ *
+ * @param adapter
+ *   A pointer to an event timer adapter structure.
+ * @param event_timers
+ *   Points to an array of objects of type *rte_event_timer* structure
+ * @param nb_event_timers
+ *   Number of event timer instances in the supplied array.
+ *
+ * @return
+ *   The number of successfully canceled event timers. The return value can be
+ *   less than the value of the *nb_timers* parameter. If the return value is
+ *   less than *nb_events*, the remaining event timers at the end of *tim*
+ *   are not consumed, and the caller has to take care of them, and rte_errno
+ *   is set accordingly. Possible errno values include:
+ *   - -EINVAL  Invalid timer adapter identifier
+ *   - -EAGAIN  Specified timer adapter is not running
+ */
+int rte_event_timer_cancel_burst(const struct rte_event_timer_adapter *adapter,
+				 struct rte_event_timer **event_timers,
+				 uint16_t nb_event_timers);
+
+#endif /* __RTE_EVENT_TIMER_ADAPTER_H__ */
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index f1949ff..a650f7a 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -875,8 +875,8 @@  rte_event_dev_close(uint8_t dev_id);
 /**< The event generated from ethdev subsystem */
 #define RTE_EVENT_TYPE_CRYPTODEV        0x1
 /**< The event generated from crypodev subsystem */
-#define RTE_EVENT_TYPE_TIMERDEV         0x2
-/**< The event generated from timerdev subsystem */
+#define RTE_EVENT_TYPE_TIMER		0x2
+/**< The event generated from event timer adapter */
 #define RTE_EVENT_TYPE_CPU              0x3
 /**< The event generated from cpu for pipelining.
  * Application may use *sub_event_type* to further classify the event