3998e2a072
Replace the BSD license header with the SPDX tag for files with only an Intel copyright on them. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2016 Intel Corporation
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/wait.h>
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#include <sys/queue.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <rte_keepalive.h>
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#include <shm.h>
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#define MAX_TIMEOUTS 4
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#define SEM_TIMEOUT_SECS 2
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static struct rte_keepalive_shm *ka_shm_create(void)
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{
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int fd = shm_open(RTE_KEEPALIVE_SHM_NAME, O_RDWR, 0666);
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size_t size = sizeof(struct rte_keepalive_shm);
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struct rte_keepalive_shm *shm;
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if (fd < 0)
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printf("Failed to open %s as SHM:%s\n",
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RTE_KEEPALIVE_SHM_NAME,
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strerror(errno));
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else {
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shm = (struct rte_keepalive_shm *) mmap(
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0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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close(fd);
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if (shm == MAP_FAILED)
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printf("Failed to mmap SHM:%s\n", strerror(errno));
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else
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return shm;
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}
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/* Reset to zero, as it was set to MAP_FAILED aka: (void *)-1 */
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shm = 0;
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return NULL;
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}
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int main(void)
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{
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struct rte_keepalive_shm *shm = ka_shm_create();
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struct timespec timeout = { .tv_nsec = 0 };
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int idx_core;
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int cnt_cores;
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uint64_t last_seen_alive_time = 0;
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uint64_t most_recent_alive_time;
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int cnt_timeouts = 0;
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int sem_errno;
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if (shm == NULL) {
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printf("Unable to access shared core state\n");
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return 1;
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}
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while (1) {
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most_recent_alive_time = 0;
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for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
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idx_core++)
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if (shm->core_last_seen_times[idx_core] >
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most_recent_alive_time)
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most_recent_alive_time =
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shm->core_last_seen_times[idx_core];
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timeout.tv_sec = time(NULL) + SEM_TIMEOUT_SECS;
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if (sem_timedwait(&shm->core_died, &timeout) == -1) {
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/* Assume no core death signals and no change in any
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* last-seen times is the keepalive monitor itself
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* failing.
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*/
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sem_errno = errno;
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last_seen_alive_time = most_recent_alive_time;
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if (sem_errno == ETIMEDOUT) {
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if (last_seen_alive_time ==
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most_recent_alive_time &&
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cnt_timeouts++ >
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MAX_TIMEOUTS) {
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printf("No updates. Exiting..\n");
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break;
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}
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} else
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printf("sem_timedwait() error (%s)\n",
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strerror(sem_errno));
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continue;
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}
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cnt_timeouts = 0;
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cnt_cores = 0;
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for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
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idx_core++)
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if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
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cnt_cores++;
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if (cnt_cores == 0) {
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/* Can happen if core was restarted since Semaphore
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* was sent, due to agent being offline.
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*/
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printf("Warning: Empty dead core report\n");
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continue;
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}
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printf("%i dead cores: ", cnt_cores);
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for (idx_core = 0;
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idx_core < RTE_KEEPALIVE_MAXCORES;
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idx_core++)
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if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
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printf("%d, ", idx_core);
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printf("\b\b\n");
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}
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if (munmap(shm, sizeof(struct rte_keepalive_shm)) != 0)
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printf("Warning: munmap() failed\n");
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return 0;
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}
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