The SIGINT and SIGTERM handler called printf() and exit() which are not async-signal-safe.
Set a flag, let the forwarding loops return, and print the stats from main() after joining the lcores. Signed-off-by: Stephen Hemminger <[email protected]> --- examples/multi_process/symmetric_mp/main.c | 26 ++++++++++++++++------ 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/examples/multi_process/symmetric_mp/main.c b/examples/multi_process/symmetric_mp/main.c index 7314a9c6ea..e2d185ab1b 100644 --- a/examples/multi_process/symmetric_mp/main.c +++ b/examples/multi_process/symmetric_mp/main.c @@ -92,18 +92,25 @@ smp_usage(const char *prgname, const char *errmsg) } -/* signal handler configured for SIGTERM and SIGINT to print stats on exit */ +/* Set by SIGTERM and SIGINT handler to stop the forwarding loops. */ +static volatile sig_atomic_t quit; + +static void +signal_handler(__rte_unused int signum) +{ + quit = 1; +} + static void -print_stats(int signum) +print_stats(void) { unsigned i; - printf("\nExiting on signal %d\n\n", signum); + for (i = 0; i < num_ports; i++){ const uint8_t p_num = ports[i]; printf("Port %u: RX - %u, TX - %u, Drop - %u\n", (unsigned)p_num, pstats[p_num].rx, pstats[p_num].tx, pstats[p_num].drop); } - exit(0); } /* Parse the argument given in the command line of the application */ @@ -344,7 +351,7 @@ lcore_main(void *arg __rte_unused) * queue number corresponding to our process number (not lcore id) */ - for (;;) { + while (!quit) { struct rte_mbuf *buf[PKT_BURST]; for (p = start_port; p < end_port; p++) { @@ -364,6 +371,8 @@ lcore_main(void *arg __rte_unused) } } } + + return 0; } /* Check the link status of all ports in up to 9s, and print them finally */ @@ -440,8 +449,8 @@ main(int argc, char **argv) struct rte_mempool *mp; /* set up signal handlers to print stats on exit */ - signal(SIGINT, print_stats); - signal(SIGTERM, print_stats); + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); /* initialise the EAL for all */ ret = rte_eal_init(argc, argv); @@ -484,6 +493,9 @@ main(int argc, char **argv) RTE_LOG(INFO, APP, "Finished Process Init.\n"); rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MAIN); + rte_eal_mp_wait_lcore(); + + print_stats(); /* clean up the EAL */ rte_eal_cleanup(); -- 2.53.0
