vcl: move vls pool lock to process local state

We only support one vls worker per process and therefore should not
share lock between processes.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I57bb536cf3bf04e8de031b07cb885f80b4fa03c9

diff --git a/src/vcl/vcl_locked.c b/src/vcl/vcl_locked.c
index b006d89..6027fd1 100644 (file)
--- a/src/vcl/vcl_locked.c
+++ b/src/vcl/vcl_locked.c
@@ -118,6 +118,7 @@ typedef struct vls_local_
 {
   int vls_wrk_index;                 /**< vls wrk index, 1 per process */
   volatile int vls_mt_n_threads;      /**< number of threads detected */
+  clib_rwlock_t vls_pool_lock;       /**< per process/wrk vls pool locks */
   pthread_mutex_t vls_mt_mq_mlock;    /**< vcl mq lock */
   pthread_mutex_t vls_mt_spool_mlock; /**< vcl select or pool lock */
   volatile u8 select_mp_check;       /**< flag set if select checks done */
@@ -129,7 +130,6 @@ static vls_process_local_t *vlsl = &vls_local;
 typedef struct vls_main_
 {
   vls_worker_t *workers;              /**< pool of vls workers */
-  clib_rwlock_t vls_pool_lock;        /**< per process/wrk vls pool locks */
   vls_shared_data_t *shared_data_pool; /**< inter proc pool of shared data */
   clib_rwlock_t shared_data_lock;      /**< shared data pool lock */
   clib_spinlock_t worker_rpc_lock;     /**< lock for inter-worker rpcs */
@@ -247,28 +247,28 @@ static inline void
 vls_mt_pool_rlock (void)
 {
   if (vlsl->vls_mt_n_threads > 1)
-    clib_rwlock_reader_lock (&vlsm->vls_pool_lock);
+    clib_rwlock_reader_lock (&vlsl->vls_pool_lock);
 }
 
 static inline void
 vls_mt_pool_runlock (void)
 {
   if (vlsl->vls_mt_n_threads > 1)
-    clib_rwlock_reader_unlock (&vlsm->vls_pool_lock);
+    clib_rwlock_reader_unlock (&vlsl->vls_pool_lock);
 }
 
 static inline void
 vls_mt_pool_wlock (void)
 {
   if (vlsl->vls_mt_n_threads > 1)
-    clib_rwlock_writer_lock (&vlsm->vls_pool_lock);
+    clib_rwlock_writer_lock (&vlsl->vls_pool_lock);
 }
 
 static inline void
 vls_mt_pool_wunlock (void)
 {
   if (vlsl->vls_mt_n_threads > 1)
-    clib_rwlock_writer_unlock (&vlsm->vls_pool_lock);
+    clib_rwlock_writer_unlock (&vlsl->vls_pool_lock);
 }
 
 typedef enum
@@ -1769,6 +1769,7 @@ vls_app_fork_child_handler (void)
   vlsl->vls_mt_n_threads = 0;
   vlsl->vls_wrk_index = vcl_get_worker_index ();
   vlsl->select_mp_check = 0;
+  clib_rwlock_init (&vlsl->vls_pool_lock);
   vls_mt_locks_init ();
 
   parent_wrk = vcl_worker_get (parent_wrk_index);
@@ -1940,7 +1941,6 @@ vls_app_create (char *app_name)
 
   vlsm = clib_mem_alloc (sizeof (vls_main_t));
   clib_memset (vlsm, 0, sizeof (*vlsm));
-  clib_rwlock_init (&vlsm->vls_pool_lock);
   clib_rwlock_init (&vlsm->shared_data_lock);
   clib_spinlock_init (&vlsm->worker_rpc_lock);
   pool_alloc (vlsm->workers, vcm->cfg.max_workers);
@@ -1950,6 +1950,7 @@ vls_app_create (char *app_name)
   atexit (vls_app_exit);
   vls_worker_alloc ();
   vlsl->vls_wrk_index = vcl_get_worker_index ();
+  clib_rwlock_init (&vlsl->vls_pool_lock);
   vls_mt_locks_init ();
   vcm->wrk_rpc_fn = vls_rpc_handler;
   return VPPCOM_OK;