#define included_vlib_threads_h
#include <vlib/main.h>
+#include <vppinfra/callback.h>
+#ifdef __linux__
#include <linux/sched.h>
-
-extern vlib_main_t **vlib_mains;
+#elif __FreeBSD__
+#include <sys/sched.h>
+#endif /* __linux__ */
void vlib_set_thread_name (char *name);
uword *coremask;
} vlib_thread_registration_t;
-/*
- * Frames have their cpu / vlib_main_t index in the low-order N bits
- * Make VLIB_MAX_CPUS a power-of-two, please...
- */
-
-#ifndef VLIB_MAX_CPUS
-#define VLIB_MAX_CPUS 256
-#endif
-
-#if VLIB_MAX_CPUS > CLIB_MAX_MHEAPS
-#error Please increase number of per-cpu mheaps
-#endif
-
-#define VLIB_CPU_MASK (VLIB_MAX_CPUS - 1) /* 0x3f, max */
-#define VLIB_OFFSET_MASK (~VLIB_CPU_MASK)
-
-#define VLIB_LOG2_THREAD_STACK_SIZE (20)
+#define VLIB_LOG2_THREAD_STACK_SIZE (21)
#define VLIB_THREAD_STACK_SIZE (1<<VLIB_LOG2_THREAD_STACK_SIZE)
-typedef enum
-{
- VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME,
-} vlib_frame_queue_msg_type_t;
-
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
volatile u32 valid;
- u32 msg_type;
+ u32 maybe_trace : 1;
u32 n_vectors;
- u32 last_n_vectors;
+ u32 offset;
+ STRUCT_MARK (end_of_reset);
- /* 256 * 4 = 1024 bytes, even mult of cache line size */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
u32 buffer_index[VLIB_FRAME_SIZE];
+ u32 aux_data[VLIB_FRAME_SIZE];
}
vlib_frame_queue_elt_t;
vlib_thread_registration_t *registration;
u8 *name;
u64 barrier_sync_count;
+ u8 barrier_elog_enabled;
+ const char *barrier_caller;
+ const char *barrier_context;
+ volatile u32 *node_reforks_required;
+ volatile u32 wait_before_barrier;
+ volatile u32 workers_before_barrier;
+ volatile u32 done_work_before_barrier;
long lwp;
- int lcore_id;
+ int cpu_id;
+ int core_id;
+ int numa_id;
pthread_t thread_id;
} vlib_worker_thread_t;
typedef struct
{
- /* enqueue side */
+ /* static data */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
- volatile u64 tail;
- u64 enqueues;
- u64 enqueue_ticks;
- u64 enqueue_vectors;
- u32 enqueue_full_events;
-
- /* dequeue side */
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
- volatile u64 head;
- u64 dequeues;
- u64 dequeue_ticks;
- u64 dequeue_vectors;
- u64 trace;
+ vlib_frame_queue_elt_t *elts;
u64 vector_threshold;
+ u64 trace;
+ u32 nelts;
- /* dequeue hint to enqueue side */
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
- volatile u64 head_hint;
+ /* modified by enqueue side */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
+ volatile u64 tail;
- /* read-only, constant, shared */
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline3);
- vlib_frame_queue_elt_t *elts;
- u32 nelts;
+ /* modified by dequeue side */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
+ volatile u64 head;
}
vlib_frame_queue_t;
-typedef struct
+struct vlib_frame_queue_main_t_;
+typedef u32 (vlib_frame_queue_dequeue_fn_t) (
+ vlib_main_t *vm, struct vlib_frame_queue_main_t_ *fqm);
+typedef struct vlib_frame_queue_main_t_
{
u32 node_index;
+ u32 frame_queue_nelts;
+
vlib_frame_queue_t **vlib_frame_queues;
/* for frame queue tracing */
frame_queue_trace_t *frame_queue_traces;
frame_queue_nelt_counter_t *frame_queue_histogram;
+ vlib_frame_queue_dequeue_fn_t *frame_queue_dequeue_fn;
} vlib_frame_queue_main_t;
+typedef struct
+{
+ uword node_index;
+ uword type_opaque;
+ uword data;
+} vlib_process_signal_event_mt_args_t;
+
/* 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);
-
-int
-vlib_frame_queue_dequeue (vlib_main_t * vm, vlib_frame_queue_main_t * fqm);
-
void vlib_worker_thread_node_runtime_update (void);
void vlib_create_worker_threads (vlib_main_t * vm, int n,
#define BARRIER_SYNC_TIMEOUT (1.0)
#endif
-void vlib_worker_thread_barrier_sync (vlib_main_t * vm);
+#define vlib_worker_thread_barrier_sync(X) {vlib_worker_thread_barrier_sync_int(X, __FUNCTION__);}
+
+void vlib_worker_thread_barrier_sync_int (vlib_main_t * vm,
+ const char *func_name);
void vlib_worker_thread_barrier_release (vlib_main_t * vm);
+u8 vlib_worker_thread_barrier_held (void);
+void vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm);
+void vlib_worker_thread_node_refork (void);
+/**
+ * Wait until each of the workers has been once around the track
+ */
+void vlib_worker_wait_one_loop (void);
+/**
+ * Flush worker's pending rpc requests to main thread's rpc queue
+ */
+void vlib_worker_flush_pending_rpc_requests (vlib_main_t *vm);
+
+static_always_inline uword
+vlib_get_thread_index (void)
+{
+ return __os_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__);
}
}
-typedef enum
+always_inline int
+__foreach_vlib_main_helper (vlib_main_t *ii, vlib_main_t **p)
{
- VLIB_WORKER_THREAD_FORK_FIXUP_ILLEGAL = 0,
- VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX,
-} vlib_fork_fixup_t;
+ vlib_main_t *vm;
+ u32 index = ii - (vlib_main_t *) 0;
-void vlib_worker_thread_fork_fixup (vlib_fork_fixup_t which);
+ if (index >= vec_len (vlib_global_main.vlib_mains))
+ return 0;
-static inline void
-vlib_worker_thread_barrier_check (void)
-{
- if (PREDICT_FALSE (*vlib_worker_threads->wait_at_barrier))
- {
- clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, 1);
- while (*vlib_worker_threads->wait_at_barrier)
- ;
- clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, -1);
- }
+ *p = vm = vlib_global_main.vlib_mains[index];
+ ASSERT (index == 0 || vm->parked_at_barrier == 1);
+ return 1;
}
-#define foreach_vlib_main(body) \
-do { \
- vlib_main_t ** __vlib_mains = 0, *this_vlib_main; \
- int ii; \
- \
- for (ii = 0; ii < vec_len (vlib_mains); ii++) \
- { \
- this_vlib_main = vlib_mains[ii]; \
- if (this_vlib_main) \
- vec_add1 (__vlib_mains, this_vlib_main); \
- } \
- \
- for (ii = 0; ii < vec_len (__vlib_mains); ii++) \
- { \
- this_vlib_main = __vlib_mains[ii]; \
- /* body uses this_vlib_main... */ \
- (body); \
- } \
- vec_free (__vlib_mains); \
-} while (0);
-
-#define foreach_sched_policy \
- _(SCHED_OTHER, OTHER, "other") \
- _(SCHED_BATCH, BATCH, "batch") \
- _(SCHED_IDLE, IDLE, "idle") \
- _(SCHED_FIFO, FIFO, "fifo") \
- _(SCHED_RR, RR, "rr")
+#define foreach_vlib_main() \
+ for (vlib_main_t *ii = 0, *this_vlib_main; \
+ __foreach_vlib_main_helper (ii, &this_vlib_main); ii++) \
+ if (this_vlib_main)
+
+#define foreach_sched_policy_posix \
+ _ (SCHED_OTHER, OTHER, "other") \
+ _ (SCHED_FIFO, FIFO, "fifo") \
+ _ (SCHED_RR, RR, "rr")
+#define foreach_sched_policy_linux \
+ _ (SCHED_BATCH, BATCH, "batch") \
+ _ (SCHED_IDLE, IDLE, "idle")
+
+#ifdef __linux__
+#define foreach_sched_policy \
+ foreach_sched_policy_posix foreach_sched_policy_linux
+#else
+#define foreach_sched_policy foreach_sched_policy_posix
+#endif /* __linux__ */
typedef enum
{
SCHED_POLICY_N,
} sched_policy_t;
-typedef struct
-{
- clib_error_t *(*vlib_launch_thread_cb) (void *fp, vlib_worker_thread_t * w,
- unsigned lcore_id);
- clib_error_t *(*vlib_thread_set_lcore_cb) (u32 thread, u16 lcore);
-} vlib_thread_callbacks_t;
-
typedef struct
{
/* Link list of registrations, built by constructors */
vlib_worker_thread_t *worker_threads;
- /*
- * Launch all threads as pthreads,
- * not eal_rte_launch (strict affinity) threads
- */
int use_pthreads;
/* Number of vlib_main / vnet_main clones */
u8 *thread_prefix;
/* main thread lcore */
- u8 main_lcore;
+ u32 main_lcore;
/* Bitmap of available CPU cores */
uword *cpu_core_bitmap;
/* scheduling policy priority */
u32 sched_priority;
- /* callbacks */
- vlib_thread_callbacks_t cb;
- int extern_thread_mgmt;
+ /* NUMA-bound heap size */
+ uword numa_heap_size;
+
} vlib_thread_main_t;
extern vlib_thread_main_t vlib_thread_main;
+#include <vlib/global_funcs.h>
+
#define VLIB_REGISTER_THREAD(x,...) \
__VA_ARGS__ vlib_thread_registration_t x; \
static void __vlib_add_thread_registration_##x (void) \
x.next = tm->next; \
tm->next = &x; \
} \
+static void __vlib_rm_thread_registration_##x (void) \
+ __attribute__((__destructor__)) ; \
+static void __vlib_rm_thread_registration_##x (void) \
+{ \
+ vlib_thread_main_t * tm = &vlib_thread_main; \
+ VLIB_REMOVE_FROM_LINKED_LIST (tm->next, &x, next); \
+} \
__VA_ARGS__ vlib_thread_registration_t x
always_inline u32
}
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
+vlib_worker_thread_barrier_check (void)
+{
+ if (PREDICT_FALSE (*vlib_worker_threads->wait_at_barrier))
+ {
+ vlib_global_main_t *vgm = vlib_get_global_main ();
+ vlib_main_t *vm = vlib_get_main ();
+ u32 thread_index = vm->thread_index;
+ f64 t = vlib_time_now (vm);
+
+ if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
+ clib_call_callbacks (vm->barrier_perf_callbacks, vm,
+ vm->clib_time.last_cpu_time, 0 /* enter */ );
+
+ if (PREDICT_FALSE (vlib_worker_threads->barrier_elog_enabled))
+ {
+ vlib_worker_thread_t *w = vlib_worker_threads + thread_index;
+ ELOG_TYPE_DECLARE (e) = {
+ .format = "barrier-wait-thread-%d",
+ .format_args = "i4",
+ };
+
+ struct
+ {
+ u32 thread_index;
+ } __clib_packed *ed;
+
+ ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track);
+ ed->thread_index = thread_index;
+ }
+
+ if (CLIB_DEBUG > 0)
+ {
+ vm = vlib_get_main ();
+ vm->parked_at_barrier = 1;
+ }
+ clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
+ while (*vlib_worker_threads->wait_at_barrier)
+ ;
+
+ /*
+ * Recompute the offset from thread-0 time.
+ * Note that vlib_time_now adds vm->time_offset, so
+ * clear it first. Save the resulting idea of "now", to
+ * see how well we're doing. See show_clock_command_fn(...)
+ */
+ {
+ f64 now;
+ vm->time_offset = 0.0;
+ now = vlib_time_now (vm);
+ vm->time_offset = vgm->vlib_mains[0]->time_last_barrier_release - now;
+ vm->time_last_barrier_release = vlib_time_now (vm);
+ }
+
+ if (CLIB_DEBUG > 0)
+ vm->parked_at_barrier = 0;
+ clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
+
+ if (PREDICT_FALSE (*vlib_worker_threads->node_reforks_required))
+ {
+ if (PREDICT_FALSE (vlib_worker_threads->barrier_elog_enabled))
+ {
+ t = vlib_time_now (vm) - t;
+ vlib_worker_thread_t *w = vlib_worker_threads + thread_index;
+ ELOG_TYPE_DECLARE (e) = {
+ .format = "barrier-refork-thread-%d",
+ .format_args = "i4",
+ };
+
+ struct
+ {
+ u32 thread_index;
+ } __clib_packed *ed;
+
+ ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
+ w->elog_track);
+ ed->thread_index = thread_index;
+ }
+
+ vlib_worker_thread_node_refork ();
+ clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
+ -1);
+ while (*vlib_worker_threads->node_reforks_required)
+ ;
+ }
+ if (PREDICT_FALSE (vlib_worker_threads->barrier_elog_enabled))
+ {
+ t = vlib_time_now (vm) - t;
+ vlib_worker_thread_t *w = vlib_worker_threads + thread_index;
+ ELOG_TYPE_DECLARE (e) = {
+ .format = "barrier-released-thread-%d: %dus",
+ .format_args = "i4i4",
+ };
+
+ struct
+ {
+ u32 thread_index;
+ u32 duration;
+ } __clib_packed *ed;
+
+ ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track);
+ ed->thread_index = thread_index;
+ ed->duration = (int) (1000000.0 * t);
+ }
+
+ if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
+ clib_call_callbacks (vm->barrier_perf_callbacks, vm,
+ vm->clib_time.last_cpu_time, 1 /* leave */ );
+ }
}
always_inline vlib_main_t *
vlib_main_t *vm;
vlib_thread_main_t *tm = &vlib_thread_main;
ASSERT (worker_index < tm->n_vlib_mains - 1);
- vm = vlib_mains[worker_index + 1];
+ vm = vlib_get_main_by_index (worker_index + 1);
ASSERT (vm);
return vm;
}
-static inline void
-vlib_put_frame_queue_elt (vlib_frame_queue_elt_t * hf)
-{
- CLIB_MEMORY_BARRIER ();
- hf->valid = 1;
-}
-
-static inline vlib_frame_queue_elt_t *
-vlib_get_frame_queue_elt (u32 frame_queue_index, u32 index)
-{
- vlib_frame_queue_t *fq;
- vlib_frame_queue_elt_t *elt;
- vlib_thread_main_t *tm = &vlib_thread_main;
- vlib_frame_queue_main_t *fqm =
- vec_elt_at_index (tm->frame_queue_mains, frame_queue_index);
- u64 new_tail;
-
- fq = fqm->vlib_frame_queues[index];
- ASSERT (fq);
-
- new_tail = __sync_add_and_fetch (&fq->tail, 1);
-
- /* Wait until a ring slot is available */
- while (new_tail >= fq->head_hint + fq->nelts)
- vlib_worker_thread_barrier_check ();
-
- elt = fq->elts + (new_tail & (fq->nelts - 1));
-
- /* this would be very bad... */
- while (elt->valid)
- ;
-
- elt->msg_type = VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME;
- elt->last_n_vectors = elt->n_vectors = 0;
-
- return elt;
-}
-
-static inline vlib_frame_queue_t *
-is_vlib_frame_queue_congested (u32 frame_queue_index,
- u32 index,
- u32 queue_hi_thresh,
- vlib_frame_queue_t **
- handoff_queue_by_worker_index)
+static inline u8
+vlib_thread_is_main_w_barrier (void)
{
- vlib_frame_queue_t *fq;
- vlib_thread_main_t *tm = &vlib_thread_main;
- vlib_frame_queue_main_t *fqm =
- vec_elt_at_index (tm->frame_queue_mains, frame_queue_index);
-
- fq = handoff_queue_by_worker_index[index];
- if (fq != (vlib_frame_queue_t *) (~0))
- return fq;
-
- fq = fqm->vlib_frame_queues[index];
- ASSERT (fq);
-
- if (PREDICT_FALSE (fq->tail >= (fq->head_hint + queue_hi_thresh)))
- {
- /* a valid entry in the array will indicate the queue has reached
- * the specified threshold and is congested
- */
- handoff_queue_by_worker_index[index] = fq;
- fq->enqueue_full_events++;
- return fq;
- }
-
- return NULL;
+ return (!vlib_num_workers ()
+ || ((vlib_get_thread_index () == 0
+ && vlib_worker_threads->wait_at_barrier[0])));
}
-static inline vlib_frame_queue_elt_t *
-vlib_get_worker_handoff_queue_elt (u32 frame_queue_index,
- u32 vlib_worker_index,
- vlib_frame_queue_elt_t **
- handoff_queue_elt_by_worker_index)
-{
- vlib_frame_queue_elt_t *elt;
-
- if (handoff_queue_elt_by_worker_index[vlib_worker_index])
- return handoff_queue_elt_by_worker_index[vlib_worker_index];
+u8 *vlib_thread_stack_init (uword thread_index);
+extern void *rpc_call_main_thread_cb_fn;
- elt = vlib_get_frame_queue_elt (frame_queue_index, vlib_worker_index);
+void
+vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
+ args);
+void vlib_rpc_call_main_thread (void *function, u8 * args, u32 size);
+void vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id);
+vlib_thread_main_t *vlib_get_thread_main_not_inline (void);
- handoff_queue_elt_by_worker_index[vlib_worker_index] = elt;
-
- return elt;
-}
-
-int vlib_thread_cb_register (struct vlib_main_t *vm,
- vlib_thread_callbacks_t * cb);
+/**
+ * Force workers sync from within worker
+ *
+ * Must be paired with @ref vlib_workers_continue
+ */
+void vlib_workers_sync (void);
+/**
+ * Release barrier after workers sync
+ */
+void vlib_workers_continue (void);
#endif /* included_vlib_threads_h */
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