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authorDamjan Marion <damarion@cisco.com>2017-04-05 19:18:20 +0200
committerDave Barach <openvpp@barachs.net>2017-04-06 11:31:39 +0000
commit586afd762bfa149f5ca167bd5fd5a0cd59ce94fe (patch)
tree808b57c61e0fe1a181871bb1ad94398c5ba42671 /src/vlib/threads.h
parentbc799c92d761a2d45105aa6a1685b3663687d2a4 (diff)
Use thread local storage for thread index
This patch deprecates stack-based thread identification, Also removes requirement that thread stacks are adjacent. Finally, possibly annoying for some folks, it renames all occurences of cpu_index and cpu_number with thread index. Using word "cpu" is misleading here as thread can be migrated ti different CPU, and also it is not related to linux cpu index. Change-Id: I68cdaf661e701d2336fc953dcb9978d10a70f7c1 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/threads.h')
-rw-r--r--src/vlib/threads.h21
1 files changed, 14 insertions, 7 deletions
diff --git a/src/vlib/threads.h b/src/vlib/threads.h
index eca4fc268d5..101d3d4ac1f 100644
--- a/src/vlib/threads.h
+++ b/src/vlib/threads.h
@@ -153,8 +153,6 @@ typedef struct
/* Called early, in thread 0's context */
clib_error_t *vlib_thread_init (vlib_main_t * vm);
-vlib_worker_thread_t *vlib_alloc_thread (vlib_main_t * vm);
-
int vlib_frame_queue_enqueue (vlib_main_t * vm, u32 node_runtime_index,
u32 frame_queue_index, vlib_frame_t * frame,
vlib_frame_queue_msg_type_t type);
@@ -183,12 +181,19 @@ u32 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts);
void vlib_worker_thread_barrier_sync (vlib_main_t * vm);
void vlib_worker_thread_barrier_release (vlib_main_t * vm);
+extern __thread uword vlib_thread_index;
+static_always_inline uword
+vlib_get_thread_index (void)
+{
+ return vlib_thread_index;
+}
+
always_inline void
vlib_smp_unsafe_warning (void)
{
if (CLIB_DEBUG > 0)
{
- if (os_get_cpu_number ())
+ if (vlib_get_thread_index ())
fformat (stderr, "%s: SMP unsafe warning...\n", __FUNCTION__);
}
}
@@ -331,21 +336,21 @@ vlib_num_workers ()
}
always_inline u32
-vlib_get_worker_cpu_index (u32 worker_index)
+vlib_get_worker_thread_index (u32 worker_index)
{
return worker_index + 1;
}
always_inline u32
-vlib_get_worker_index (u32 cpu_index)
+vlib_get_worker_index (u32 thread_index)
{
- return cpu_index - 1;
+ return thread_index - 1;
}
always_inline u32
vlib_get_current_worker_index ()
{
- return os_get_cpu_number () - 1;
+ return vlib_get_thread_index () - 1;
}
static inline void
@@ -467,6 +472,8 @@ vlib_get_worker_handoff_queue_elt (u32 frame_queue_index,
return elt;
}
+u8 *vlib_thread_stack_init (uword thread_index);
+
int vlib_thread_cb_register (struct vlib_main_t *vm,
vlib_thread_callbacks_t * cb);