Fix infinite loop when restarting DPDK secondary process

Author: jinliu777

dpdk/lib/timer/rte_timer.c

@@ -213,6 +213,20 @@ rte_timer_init(struct rte_timer *tim)
 	rte_atomic_store_explicit(&tim->status.u32, status.u32, rte_memory_order_relaxed);
 }
 
+int
+rte_timer_meta_init(void)
+{
+    struct rte_timer_data *timer_data;
+    struct priv_timer *pt;
+    unsigned lcore_id = rte_lcore_id();
+
+    TIMER_DATA_VALID_GET_OR_ERR_RET(default_data_id, timer_data, -EINVAL);
+    pt = &timer_data->priv_timer[lcore_id];
+    memset(pt, 0, sizeof(*pt));
+    pt->prev_lcore = lcore_id;
+    return 0;
+}
+
 /*
  * if timer is pending or stopped (or running on the same core than
  * us), mark timer as configuring, and on success return the previous

dpdk/lib/timer/rte_timer.h

@@ -190,6 +190,15 @@ void rte_timer_subsystem_finalize(void);
  */
 void rte_timer_init(struct rte_timer *tim);
 
+/**
+ * Initialize the timer metadata.
+ * For f-stack internal use only.
+ * @return
+ *   - 0: Success
+ *   - -EINVAL: invalid timer data instance identifier
+ */
+int rte_timer_meta_init(void);
+
 /**
  * Reset and start the timer associated with the timer handle.
  *

lib/ff_dpdk_if.c

@@ -884,6 +884,7 @@ static int
 init_clock(void)
 {
     rte_timer_subsystem_init();
+    rte_timer_meta_init();
     uint64_t hz = rte_get_timer_hz();
     uint64_t intrs = US_PER_S / ff_global_cfg.freebsd.hz;
     uint64_t tsc = (hz + US_PER_S - 1) / US_PER_S * intrs;
@@ -897,6 +898,12 @@ init_clock(void)
     return 0;
 }
 
+static int
+stop_clock(void) {
+    rte_timer_stop_sync(&freebsd_clock);
+    return 0;
+}
+
 #if defined(FF_FLOW_ISOLATE) || defined(FF_FDIR)
 /** Print a message out of a flow error. */
 static int
@@ -2436,6 +2443,7 @@ ff_dpdk_run(loop_func_t loop, void *arg) {
     lr->arg = arg;
     rte_eal_mp_remote_launch(main_loop, lr, CALL_MAIN);
     rte_eal_mp_wait_lcore();
+    stop_clock();
     rte_free(lr);
 
     /* FIXME: Cleanup ff_config, freebsd etc. */