#include <errno.h>
#include <rte_launch.h>
+#include <rte_eal_trace.h>
#include <rte_atomic.h>
#include <rte_pause.h>
#include <rte_lcore.h>
#include "eal_private.h"
+#include "eal_thread.h"
/*
* Wait until a lcore finished its job.
rte_eal_wait_lcore(unsigned worker_id)
{
while (__atomic_load_n(&lcore_config[worker_id].state,
- __ATOMIC_ACQUIRE) != WAIT)
+ __ATOMIC_ACQUIRE) != WAIT)
rte_pause();
return lcore_config[worker_id].ret;
}
+/*
+ * Send a message to a worker lcore identified by worker_id to call a
+ * function f with argument arg. Once the execution is done, the
+ * remote lcore switches to WAIT state.
+ */
+int
+rte_eal_remote_launch(lcore_function_t *f, void *arg, unsigned int worker_id)
+{
+ int rc = -EBUSY;
+
+ /* Check if the worker is in 'WAIT' state. Use acquire order
+ * since 'state' variable is used as the guard variable.
+ */
+ if (__atomic_load_n(&lcore_config[worker_id].state,
+ __ATOMIC_ACQUIRE) != WAIT)
+ goto finish;
+
+ lcore_config[worker_id].arg = arg;
+ /* Ensure that all the memory operations are completed
+ * before the worker thread starts running the function.
+ * Use worker thread function as the guard variable.
+ */
+ __atomic_store_n(&lcore_config[worker_id].f, f, __ATOMIC_RELEASE);
+
+ eal_thread_wake_worker(worker_id);
+ rc = 0;
+
+finish:
+ rte_eal_trace_thread_remote_launch(f, arg, worker_id, rc);
+ return rc;
+}
+
/*
* Check that every WORKER lcores are in WAIT state, then call
* rte_eal_remote_launch() for all of them. If call_main is true