-/*-
- * BSD LICENSE
- *
- * Copyright 2015 Intel Shannon Ltd. 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2015-2016 Intel Corporation.
*/
/**
#ifndef _KEEPALIVE_H_
#define _KEEPALIVE_H_
+#include <rte_config.h>
#include <rte_memory.h>
#ifndef RTE_KEEPALIVE_MAXCORES
#define RTE_KEEPALIVE_MAXCORES RTE_MAX_LCORE
#endif
+enum rte_keepalive_state {
+ RTE_KA_STATE_UNUSED = 0,
+ RTE_KA_STATE_ALIVE = 1,
+ RTE_KA_STATE_MISSING = 4,
+ RTE_KA_STATE_DEAD = 2,
+ RTE_KA_STATE_GONE = 3,
+ RTE_KA_STATE_DOZING = 5,
+ RTE_KA_STATE_SLEEP = 6
+};
/**
* Keepalive failure callback.
*
* Receives a data pointer passed to rte_keepalive_create() and the id of the
* failed core.
+ * @param data Data pointer passed to rte_keepalive_create()
+ * @param id_core ID of the core that has failed
*/
typedef void (*rte_keepalive_failure_callback_t)(
void *data,
const int id_core);
+/**
+ * Keepalive relay callback.
+ *
+ * Receives a data pointer passed to rte_keepalive_register_relay_callback(),
+ * the id of the core for which state is to be forwarded, and details of the
+ * current core state.
+ * @param data Data pointer passed to rte_keepalive_register_relay_callback()
+ * @param id_core ID of the core for which state is being reported
+ * @param core_state The current state of the core
+ * @param Timestamp of when core was last seen alive
+ */
+typedef void (*rte_keepalive_relay_callback_t)(
+ void *data,
+ const int id_core,
+ enum rte_keepalive_state core_state,
+ uint64_t last_seen
+ );
/**
* Keepalive state structure.
* @internal
*/
-struct rte_keepalive {
- /** Core Liveness. */
- enum {
- ALIVE = 1,
- MISSING = 0,
- DEAD = 2,
- GONE = 3
- } __rte_cache_aligned state_flags[RTE_KEEPALIVE_MAXCORES];
-
- /** Last-seen-alive timestamps */
- uint64_t last_alive[RTE_KEEPALIVE_MAXCORES];
-
- /**
- * Cores to check.
- * Indexed by core id, non-zero if the core should be checked.
- */
- uint8_t active_cores[RTE_KEEPALIVE_MAXCORES];
-
- /** Dead core handler. */
- rte_keepalive_failure_callback_t callback;
-
- /**
- * Dead core handler app data.
- * Pointer is passed to dead core handler.
- */
- void *callback_data;
- uint64_t tsc_initial;
- uint64_t tsc_mhz;
-};
-
+struct rte_keepalive;
/**
* Initialise keepalive sub-system.
rte_keepalive_failure_callback_t callback,
void *data);
-
/**
* Checks & handles keepalive state of monitored cores.
* @param *ptr_timer Triggering timer (unused)
*/
void rte_keepalive_dispatch_pings(void *ptr_timer, void *ptr_data);
-
/**
* Registers a core for keepalive checks.
* @param *keepcfg
void rte_keepalive_register_core(struct rte_keepalive *keepcfg,
const int id_core);
-
/**
* Per-core keepalive check.
* @param *keepcfg
* This function needs to be called from within the main process loop of
* the LCore to be checked.
*/
-static inline void
-rte_keepalive_mark_alive(struct rte_keepalive *keepcfg)
-{
- keepcfg->state_flags[rte_lcore_id()] = ALIVE;
-}
+void
+rte_keepalive_mark_alive(struct rte_keepalive *keepcfg);
+/**
+ * Per-core sleep-time indication.
+ * @param *keepcfg
+ * Keepalive structure pointer
+ *
+ * If CPU idling is enabled, this function needs to be called from within
+ * the main process loop of the LCore going to sleep, in order to avoid
+ * the LCore being mis-detected as dead.
+ */
+void
+rte_keepalive_mark_sleep(struct rte_keepalive *keepcfg);
+
+/**
+ * Registers a 'live core' callback.
+ *
+ * The complement of the 'dead core' callback. This is called when a
+ * core is known to be alive, and is intended for cases when an app
+ * needs to know 'liveness' beyond just knowing when a core has died.
+ *
+ * @param *keepcfg
+ * Keepalive structure pointer
+ * @param callback
+ * Function called upon detection of a dead core.
+ * @param data
+ * Data pointer to be passed to function callback.
+ */
+void
+rte_keepalive_register_relay_callback(struct rte_keepalive *keepcfg,
+ rte_keepalive_relay_callback_t callback,
+ void *data);
#endif /* _KEEPALIVE_H_ */