#undef _
};
-#ifndef CLIB_MULTIARCH_VARIANT
+#ifndef CLIB_MARCH_VARIANT
u8 *
format_memif_device_name (u8 * s, va_list * args)
{
static_always_inline uword
memif_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, memif_if_t * mif,
- memif_ring_type_t type)
+ memif_ring_type_t type, memif_queue_t * mq,
+ memif_per_thread_data_t * ptd)
{
- u8 qid;
memif_ring_t *ring;
u32 *buffers = vlib_frame_args (frame);
u32 n_left = frame->n_vectors;
u32 n_copy_op;
u16 ring_size, mask, slot, free_slots;
- u32 thread_index = vlib_get_thread_index ();
- memif_per_thread_data_t *ptd = vec_elt_at_index (memif_main.per_thread_data,
- thread_index);
- u8 tx_queues = vec_len (mif->tx_queues);
- memif_queue_t *mq;
int n_retries = 5;
vlib_buffer_t *b0, *b1, *b2, *b3;
memif_copy_op_t *co;
memif_region_index_t last_region = ~0;
void *last_region_shm = 0;
- if (tx_queues < vec_len (vlib_mains))
- {
- ASSERT (tx_queues > 0);
- qid = thread_index % tx_queues;
- clib_spinlock_lock_if_init (&mif->lockp);
- }
- else
- qid = thread_index;
-
- mq = vec_elt_at_index (mif->tx_queues, qid);
ring = mq->ring;
ring_size = 1 << mq->log2_ring_size;
mask = ring_size - 1;
return frame->n_vectors;
}
+static_always_inline uword
+memif_interface_tx_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, memif_if_t * mif,
+ memif_queue_t * mq,
+ memif_per_thread_data_t * ptd)
+{
+ memif_ring_t *ring = mq->ring;
+ u32 *buffers = vlib_frame_args (frame);
+ u32 n_left = frame->n_vectors;
+ u16 slot, free_slots, n_free;
+ u16 ring_size = 1 << mq->log2_ring_size;
+ u16 mask = ring_size - 1;
+ int n_retries = 5;
+ vlib_buffer_t *b0;
+
+retry:
+ n_free = ring->tail - mq->last_tail;
+ if (n_free >= 16)
+ {
+ vlib_buffer_free_from_ring_no_next (vm, mq->buffers,
+ mq->last_tail & mask,
+ ring_size, n_free);
+ mq->last_tail += n_free;
+ }
+
+ slot = ring->head;
+ free_slots = ring_size - ring->head + mq->last_tail;
+
+ while (n_left && free_slots)
+ {
+ u16 s0;
+ u16 slots_in_packet = 1;
+ memif_desc_t *d0;
+ u32 bi0;
+
+ CLIB_PREFETCH (&ring->desc[(slot + 8) & mask], CLIB_CACHE_LINE_BYTES,
+ STORE);
+
+ if (PREDICT_TRUE (n_left >= 4))
+ vlib_prefetch_buffer_header (vlib_get_buffer (vm, buffers[3]), LOAD);
+
+ bi0 = buffers[0];
+
+ next_in_chain:
+ s0 = slot & mask;
+ d0 = &ring->desc[s0];
+ mq->buffers[s0] = bi0;
+ b0 = vlib_get_buffer (vm, bi0);
+
+ d0->region = b0->buffer_pool_index + 1;
+ d0->offset = (void *) b0->data + b0->current_data -
+ mif->regions[d0->region].shm;
+ d0->length = b0->current_length;
+
+ free_slots--;
+ slot++;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ if (PREDICT_FALSE (free_slots == 0))
+ {
+ /* revert to last fully processed packet */
+ free_slots += slots_in_packet;
+ slot -= slots_in_packet;
+ goto no_free_slots;
+ }
+
+ d0->flags = MEMIF_DESC_FLAG_NEXT;
+ bi0 = b0->next_buffer;
+
+ /* next */
+ slots_in_packet++;
+ goto next_in_chain;
+ }
+
+ d0->flags = 0;
+
+ /* next from */
+ buffers++;
+ n_left--;
+ }
+no_free_slots:
+
+ CLIB_MEMORY_STORE_BARRIER ();
+ ring->head = slot;
+
+ if (n_left && n_retries--)
+ goto retry;
+
+ clib_spinlock_unlock_if_init (&mif->lockp);
+
+ if (n_left)
+ {
+ vlib_error_count (vm, node->node_index, MEMIF_TX_ERROR_NO_FREE_SLOTS,
+ n_left);
+ vlib_buffer_free (vm, buffers, n_left);
+ }
+
+ if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0 && mq->int_fd > -1)
+ {
+ u64 b = 1;
+ CLIB_UNUSED (int r) = write (mq->int_fd, &b, sizeof (b));
+ mq->int_count++;
+ }
+
+ return frame->n_vectors;
+}
+
uword
CLIB_MULTIARCH_FN (memif_interface_tx) (vlib_main_t * vm,
vlib_node_runtime_t * node,
memif_main_t *nm = &memif_main;
vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
memif_if_t *mif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
+ memif_queue_t *mq;
+ u32 thread_index = vm->thread_index;
+ memif_per_thread_data_t *ptd = vec_elt_at_index (memif_main.per_thread_data,
+ thread_index);
+ u8 tx_queues = vec_len (mif->tx_queues);
+
+ if (tx_queues < vec_len (vlib_mains))
+ {
+ ASSERT (tx_queues > 0);
+ mq = vec_elt_at_index (mif->tx_queues, thread_index % tx_queues);
+ clib_spinlock_lock_if_init (&mif->lockp);
+ }
+ else
+ mq = vec_elt_at_index (mif->tx_queues, thread_index);
- if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
- return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_S2M);
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ return memif_interface_tx_zc_inline (vm, node, frame, mif, mq, ptd);
+ else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
+ return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_S2M,
+ mq, ptd);
else
- return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S);
+ return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S,
+ mq, ptd);
}
static __clib_unused void
return 0;
}
-#ifndef CLIB_MULTIARCH_VARIANT
+#ifndef CLIB_MARCH_VARIANT
/* *INDENT-OFF* */
VNET_DEVICE_CLASS (memif_device_class) = {
.name = "memif",
vlib_node_function_t __clib_weak memif_interface_tx_avx512;
vlib_node_function_t __clib_weak memif_interface_tx_avx2;
static void __clib_constructor
-dpdk_interface_tx_multiarch_select (void)
+memif_interface_tx_multiarch_select (void)
{
if (memif_interface_tx_avx512 && clib_cpu_supports_avx512f ())
memif_device_class.tx_function = memif_interface_tx_avx512;
Code Review / vpp.git / blobdiff