#include <vppinfra/tw_timer_1t_3w_1024sl_ov.h>
#include <vlib/unix/unix.h>
-#include <vlib/unix/cj.h>
-
-CJ_GLOBAL_LOG_PROTOTYPE;
/* Actually allocate a few extra slots of vector data to support
speculative vector enqueues which overflow vector data in next frame. */
return vlib_get_frame (vm, f);
}
+static inline void
+vlib_validate_frame_indices (vlib_frame_t * f)
+{
+ if (CLIB_DEBUG > 0)
+ {
+ int i;
+ u32 *from = vlib_frame_vector_args (f);
+
+ /* Check for bad buffer index values */
+ for (i = 0; i < f->n_vectors; i++)
+ {
+ if (from[i] == 0)
+ {
+ clib_warning ("BUG: buffer index 0 at index %d", i);
+ ASSERT (0);
+ }
+ else if (from[i] == 0xfefefefe)
+ {
+ clib_warning ("BUG: frame poison pattern at index %d", i);
+ ASSERT (0);
+ }
+ }
+ }
+}
+
void
vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
{
if (f->n_vectors == 0)
return;
+ vlib_validate_frame_indices (f);
+
to_node = vlib_get_node (vm, to_node_index);
vec_add2 (vm->node_main.pending_frames, p, 1);
f = vlib_get_frame (vm, nf->frame);
ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
+
+ vlib_validate_frame_indices (f);
+
n_after = VLIB_FRAME_SIZE - n_vectors_left;
n_before = f->n_vectors;
{
}
+static_always_inline u64
+dispatch_pending_interrupts (vlib_main_t * vm, vlib_node_main_t * nm,
+ u64 cpu_time_now)
+{
+ vlib_node_runtime_t *n;
+
+ for (int i = 0; i < _vec_len (nm->pending_local_interrupts); i++)
+ {
+ vlib_node_interrupt_t *in;
+ in = vec_elt_at_index (nm->pending_local_interrupts, i);
+ n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
+ in->node_runtime_index);
+ n->interrupt_data = in->data;
+ cpu_time_now = dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
+ VLIB_NODE_STATE_INTERRUPT, /* frame */ 0,
+ cpu_time_now);
+ }
+ vec_reset_length (nm->pending_local_interrupts);
+ return cpu_time_now;
+}
static_always_inline void
vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
vlib_thread_main_t *tm = vlib_get_thread_main ();
uword i;
u64 cpu_time_now;
+ f64 now;
vlib_frame_queue_main_t *fqm;
- u32 *last_node_runtime_indices = 0;
u32 frame_queue_check_counter = 0;
/* Initialize pending node vector. */
cpu_time_now = clib_cpu_time_now ();
/* Pre-allocate interupt runtime indices and lock. */
- vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
- vec_alloc (last_node_runtime_indices, 32);
- if (!is_main)
- clib_spinlock_init (&nm->pending_interrupt_lock);
+ vec_alloc (nm->pending_local_interrupts, 32);
+ vec_alloc (nm->pending_remote_interrupts, 32);
+ clib_spinlock_init (&nm->pending_interrupt_lock);
/* Pre-allocate expired nodes. */
if (!nm->polling_threshold_vector_length)
vm->cpu_id = clib_get_current_cpu_id ();
vm->numa_node = clib_get_current_numa_node ();
+ os_set_numa_index (vm->numa_node);
/* Start all processes. */
if (is_main)
if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
vm->queue_signal_callback (vm);
- /* Next handle interrupts. */
- {
- /* unlocked read, for performance */
- uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
- uword i;
- if (PREDICT_FALSE (l > 0))
- {
- u32 *tmp;
- if (!is_main)
- {
- clib_spinlock_lock (&nm->pending_interrupt_lock);
- /* Re-read w/ lock held, in case another thread added an item */
- l = _vec_len (nm->pending_interrupt_node_runtime_indices);
- }
+ /* handle local interruots */
+ if (_vec_len (nm->pending_local_interrupts))
+ cpu_time_now = dispatch_pending_interrupts (vm, nm, cpu_time_now);
+
+ /* handle remote interruots */
+ if (_vec_len (nm->pending_remote_interrupts))
+ {
+ vlib_node_interrupt_t *in;
+
+ /* at this point it is known that
+ * vec_len (nm->pending_local_interrupts) is zero so we quickly swap
+ * local and remote vector under the spinlock */
+ clib_spinlock_lock (&nm->pending_interrupt_lock);
+ in = nm->pending_local_interrupts;
+ nm->pending_local_interrupts = nm->pending_remote_interrupts;
+ nm->pending_remote_interrupts = in;
+ clib_spinlock_unlock (&nm->pending_interrupt_lock);
+
+ cpu_time_now = dispatch_pending_interrupts (vm, nm, cpu_time_now);
+ }
- tmp = nm->pending_interrupt_node_runtime_indices;
- nm->pending_interrupt_node_runtime_indices =
- last_node_runtime_indices;
- last_node_runtime_indices = tmp;
- _vec_len (last_node_runtime_indices) = 0;
- if (!is_main)
- clib_spinlock_unlock (&nm->pending_interrupt_lock);
- for (i = 0; i < l; i++)
- {
- n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
- last_node_runtime_indices[i]);
- cpu_time_now =
- dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
- VLIB_NODE_STATE_INTERRUPT,
- /* frame */ 0,
- cpu_time_now);
- }
- }
- }
/* Input nodes may have added work to the pending vector.
Process pending vector until there is nothing left.
All pending vectors will be processed from input -> output. */
/* Record time stamp in case there are no enabled nodes and above
calls do not update time stamp. */
cpu_time_now = clib_cpu_time_now ();
+ vm->loops_this_reporting_interval++;
+ now = clib_time_now_internal (&vm->clib_time, cpu_time_now);
+ /* Time to update loops_per_second? */
+ if (PREDICT_FALSE (now >= vm->loop_interval_end))
+ {
+ /* Next sample ends in 20ms */
+ if (vm->loop_interval_start)
+ {
+ f64 this_loops_per_second;
+
+ this_loops_per_second =
+ ((f64) vm->loops_this_reporting_interval) / (now -
+ vm->loop_interval_start);
+
+ vm->loops_per_second =
+ vm->loops_per_second * vm->damping_constant +
+ (1.0 - vm->damping_constant) * this_loops_per_second;
+ if (vm->loops_per_second != 0.0)
+ vm->seconds_per_loop = 1.0 / vm->loops_per_second;
+ else
+ vm->seconds_per_loop = 0.0;
+ }
+ /* New interval starts now, and ends in 20ms */
+ vm->loop_interval_start = now;
+ vm->loop_interval_end = now + 2e-4;
+ vm->loops_this_reporting_interval = 0;
+ }
}
}
;
else if (unformat (input, "elog-post-mortem-dump"))
vm->elog_post_mortem_dump = 1;
+ else if (unformat (input, "buffer-alloc-success-rate %f",
+ &vm->buffer_alloc_success_rate))
+ {
+ if (VLIB_BUFFER_ALLOC_FAULT_INJECTOR == 0)
+ return clib_error_return
+ (0, "Buffer fault injection not configured");
+ }
+ else if (unformat (input, "buffer-alloc-success-seed %u",
+ &vm->buffer_alloc_success_seed))
+ {
+ if (VLIB_BUFFER_ALLOC_FAULT_INJECTOR == 0)
+ return clib_error_return
+ (0, "Buffer fault injection not configured");
+ }
else
return unformat_parse_error (input);
}
vm->queue_signal_callback = dummy_queue_signal_callback;
- clib_time_init (&vm->clib_time);
-
/* Turn on event log. */
if (!vm->elog_main.event_ring_size)
vm->elog_main.event_ring_size = 128 << 10;
vec_validate (vm->processing_rpc_requests, 0);
_vec_len (vm->processing_rpc_requests) = 0;
+ /* Default params for the buffer allocator fault injector, if configured */
+ if (VLIB_BUFFER_ALLOC_FAULT_INJECTOR > 0)
+ {
+ vm->buffer_alloc_success_seed = 0xdeaddabe;
+ vm->buffer_alloc_success_rate = 0.80;
+ }
+
if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
goto done;
+ /*
+ * Use exponential smoothing, with a half-life of 1 second
+ * reported_rate(t) = reported_rate(t-1) * K + rate(t)*(1-K)
+ *
+ * Sample every 20ms, aka 50 samples per second
+ * K = exp (-1.0/20.0);
+ * K = 0.95
+ */
+ vm->damping_constant = exp (-1.0 / 20.0);
+
/* Sort per-thread init functions before we start threads */
vlib_sort_init_exit_functions (&vm->worker_init_function_registrations);
Code Review / vpp.git / blobdiff