diff options
Diffstat (limited to 'src/dpdk/lib/librte_eal/common/rte_keepalive.c')
| -rw-r--r-- | src/dpdk/lib/librte_eal/common/rte_keepalive.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/dpdk/lib/librte_eal/common/rte_keepalive.c b/src/dpdk/lib/librte_eal/common/rte_keepalive.c new file mode 100644 index 00000000..9765d1bd --- /dev/null +++ b/src/dpdk/lib/librte_eal/common/rte_keepalive.c @@ -0,0 +1,183 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2015-2016 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. + */ + +#include <inttypes.h> + +#include <rte_common.h> +#include <rte_cycles.h> +#include <rte_lcore.h> +#include <rte_log.h> +#include <rte_keepalive.h> +#include <rte_malloc.h> +#include <rte_cycles.h> + +struct rte_keepalive { + /** Core Liveness. */ + enum rte_keepalive_state __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; + + /** Core state relay handler. */ + rte_keepalive_relay_callback_t relay_callback; + + /** + * Core state relay handler app data. + * Pointer is passed to live core handler. + */ + void *relay_callback_data; +}; + +static void +print_trace(const char *msg, struct rte_keepalive *keepcfg, int idx_core) +{ + RTE_LOG(INFO, EAL, "%sLast seen %" PRId64 "ms ago.\n", + msg, + ((rte_rdtsc() - keepcfg->last_alive[idx_core])*1000) + / rte_get_tsc_hz() + ); +} + +void +rte_keepalive_dispatch_pings(__rte_unused void *ptr_timer, + void *ptr_data) +{ + struct rte_keepalive *keepcfg = ptr_data; + int idx_core; + + for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES; idx_core++) { + if (keepcfg->active_cores[idx_core] == 0) + continue; + + switch (keepcfg->state_flags[idx_core]) { + case RTE_KA_STATE_UNUSED: + break; + case RTE_KA_STATE_ALIVE: /* Alive */ + keepcfg->state_flags[idx_core] = RTE_KA_STATE_MISSING; + keepcfg->last_alive[idx_core] = rte_rdtsc(); + break; + case RTE_KA_STATE_MISSING: /* MIA */ + print_trace("Core MIA. ", keepcfg, idx_core); + keepcfg->state_flags[idx_core] = RTE_KA_STATE_DEAD; + break; + case RTE_KA_STATE_DEAD: /* Dead */ + keepcfg->state_flags[idx_core] = RTE_KA_STATE_GONE; + print_trace("Core died. ", keepcfg, idx_core); + if (keepcfg->callback) + keepcfg->callback( + keepcfg->callback_data, + idx_core + ); + break; + case RTE_KA_STATE_GONE: /* Buried */ + break; + case RTE_KA_STATE_DOZING: /* Core going idle */ + keepcfg->state_flags[idx_core] = RTE_KA_STATE_SLEEP; + keepcfg->last_alive[idx_core] = rte_rdtsc(); + break; + case RTE_KA_STATE_SLEEP: /* Idled core */ + break; + } + if (keepcfg->relay_callback) + keepcfg->relay_callback( + keepcfg->relay_callback_data, + idx_core, + keepcfg->state_flags[idx_core], + keepcfg->last_alive[idx_core] + ); + } +} + +struct rte_keepalive * +rte_keepalive_create(rte_keepalive_failure_callback_t callback, + void *data) +{ + struct rte_keepalive *keepcfg; + + keepcfg = rte_zmalloc("RTE_EAL_KEEPALIVE", + sizeof(struct rte_keepalive), + RTE_CACHE_LINE_SIZE); + if (keepcfg != NULL) { + keepcfg->callback = callback; + keepcfg->callback_data = data; + keepcfg->tsc_initial = rte_rdtsc(); + keepcfg->tsc_mhz = rte_get_tsc_hz() / 1000; + } + return keepcfg; +} + +void rte_keepalive_register_relay_callback(struct rte_keepalive *keepcfg, + rte_keepalive_relay_callback_t callback, + void *data) +{ + keepcfg->relay_callback = callback; + keepcfg->relay_callback_data = data; +} + +void +rte_keepalive_register_core(struct rte_keepalive *keepcfg, const int id_core) +{ + if (id_core < RTE_KEEPALIVE_MAXCORES) { + keepcfg->active_cores[id_core] = RTE_KA_STATE_ALIVE; + keepcfg->last_alive[id_core] = rte_rdtsc(); + } +} + +void +rte_keepalive_mark_alive(struct rte_keepalive *keepcfg) +{ + keepcfg->state_flags[rte_lcore_id()] = RTE_KA_STATE_ALIVE; +} + +void +rte_keepalive_mark_sleep(struct rte_keepalive *keepcfg) +{ + keepcfg->state_flags[rte_lcore_id()] = RTE_KA_STATE_DOZING; +} |