Add config option to use dlmalloc instead of mheap

[vpp.git] / src / vlib / threads.c

diff --git a/src/vlib/threads.c b/src/vlib/threads.c
index edf5a0e..c53c5d6 100644 (file)
--- a/src/vlib/threads.c
+++ b/src/vlib/threads.c
@@ -348,9 +348,13 @@ vlib_thread_init (vlib_main_t * vm)
     }
 
   /* grab cpu for main thread */
-  if (!tm->main_lcore)
+  if (tm->main_lcore == ~0)
     {
-      tm->main_lcore = clib_bitmap_first_set (avail_cpu);
+      /* if main-lcore is not set, we try to use lcore 1 */
+      if (clib_bitmap_get (avail_cpu, 1))
+       tm->main_lcore = 1;
+      else
+       tm->main_lcore = clib_bitmap_first_set (avail_cpu);
       if (tm->main_lcore == (u8) ~ 0)
        return clib_error_return (0, "no available cpus to be used for the"
                                  " main thread");
@@ -723,7 +727,6 @@ start_workers (vlib_main_t * vm)
   u32 n_vlib_mains = tm->n_vlib_mains;
   u32 worker_thread_index;
   u8 *main_heap = clib_mem_get_per_cpu_heap ();
-  mheap_t *main_heap_header = mheap_header (main_heap);
 
   vec_reset_length (vlib_worker_threads);
 
@@ -738,12 +741,6 @@ start_workers (vlib_main_t * vm)
       vlib_set_thread_name ((char *) w->name);
     }
 
-  /*
-   * Truth of the matter: we always use at least two
-   * threads. So, make the main heap thread-safe
-   * and make the event log thread-safe.
-   */
-  main_heap_header->flags |= MHEAP_FLAG_THREAD_SAFE;
   vm->elog_main.lock =
     clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
   vm->elog_main.lock[0] = 0;
@@ -797,9 +794,17 @@ start_workers (vlib_main_t * vm)
              vlib_node_t *n;
 
              vec_add2 (vlib_worker_threads, w, 1);
+             /* Currently unused, may not really work */
              if (tr->mheap_size)
-               w->thread_mheap =
-                 mheap_alloc (0 /* use VM */ , tr->mheap_size);
+               {
+#if USE_DLMALLOC == 0
+                 w->thread_mheap =
+                   mheap_alloc (0 /* use VM */ , tr->mheap_size);
+#else
+                 w->thread_mheap = create_mspace (tr->mheap_size,
+                                                  0 /* unlocked */ );
+#endif
+               }
              else
                w->thread_mheap = main_heap;
 
@@ -827,7 +832,8 @@ start_workers (vlib_main_t * vm)
 
              vm_clone->thread_index = worker_thread_index;
              vm_clone->heap_base = w->thread_mheap;
-             vm_clone->mbuf_alloc_list = 0;
+             vm_clone->heap_aligned_base = (void *)
+               (((uword) w->thread_mheap) & ~(VLIB_FRAME_ALIGN - 1));
              vm_clone->init_functions_called =
                hash_create (0, /* value bytes */ 0);
              vm_clone->pending_rpc_requests = 0;
@@ -956,8 +962,15 @@ start_workers (vlib_main_t * vm)
            {
              vec_add2 (vlib_worker_threads, w, 1);
              if (tr->mheap_size)
-               w->thread_mheap =
-                 mheap_alloc (0 /* use VM */ , tr->mheap_size);
+               {
+#if USE_DLMALLOC == 0
+                 w->thread_mheap =
+                   mheap_alloc (0 /* use VM */ , tr->mheap_size);
+#else
+                 w->thread_mheap =
+                   create_mspace (tr->mheap_size, 0 /* locked */ );
+#endif
+               }
              else
                w->thread_mheap = main_heap;
              w->thread_stack =
@@ -1263,6 +1276,7 @@ cpu_config (vlib_main_t * vm, unformat_input_t * input)
   tm->n_thread_stacks = 1;     /* account for main thread */
   tm->sched_policy = ~0;
   tm->sched_priority = ~0;
+  tm->main_lcore = ~0;
 
   tr = tm->next;
 
@@ -1493,6 +1507,18 @@ vlib_worker_thread_barrier_sync_int (vlib_main_t * vm)
 
 }
 
+void vlib_stat_segment_lock (void) __attribute__ ((weak));
+void
+vlib_stat_segment_lock (void)
+{
+}
+
+void vlib_stat_segment_unlock (void) __attribute__ ((weak));
+void
+vlib_stat_segment_unlock (void)
+{
+}
+
 void
 vlib_worker_thread_barrier_release (vlib_main_t * vm)
 {
@@ -1522,6 +1548,13 @@ vlib_worker_thread_barrier_release (vlib_main_t * vm)
   /* Update (all) node runtimes before releasing the barrier, if needed */
   if (vm->need_vlib_worker_thread_node_runtime_update)
     {
+      /*
+       * Lock stat segment here, so we's safe when
+       * rebuilding the stat segment node clones from the
+       * stat thread...
+       */
+      vlib_stat_segment_lock ();
+
       /* Do stats elements on main thread */
       worker_thread_node_runtime_update_internal ();
       vm->need_vlib_worker_thread_node_runtime_update = 0;
@@ -1563,6 +1596,7 @@ vlib_worker_thread_barrier_release (vlib_main_t * vm)
              os_panic ();
            }
        }
+      vlib_stat_segment_unlock ();
     }
 
   t_closed_total = now - vm->barrier_epoch;