#define foreach_nsim_error \
_(BUFFERED, "Packets buffered") \
_(DROPPED, "Packets dropped due to lack of space") \
-_(LOSS, "Network loss simulation drop packets")
+_(LOSS, "Network loss simulation drop packets") \
+_(REORDERED, "Packets reordered")
typedef enum
{
NSIM_N_NEXT,
} nsim_next_t;
+static void
+nsim_set_actions (nsim_main_t * nsm, vlib_buffer_t ** b,
+ nsim_node_ctx_t * ctx, u32 n_actions)
+{
+ int i;
+
+ memset (ctx->action, 0, n_actions * sizeof (ctx->action[0]));
+
+ if (PREDICT_FALSE (nsm->drop_fraction != 0.0))
+ {
+ for (i = 0; i < n_actions; i++)
+ if (random_f64 (&nsm->seed) <= nsm->drop_fraction)
+ ctx->action[i] |= NSIM_ACTION_DROP;
+ }
+
+ if (PREDICT_FALSE (nsm->reorder_fraction != 0.0))
+ {
+ for (i = 0; i < n_actions; i++)
+ if (random_f64 (&nsm->seed) <= nsm->reorder_fraction)
+ ctx->action[i] |= NSIM_ACTION_REORDER;
+ }
+}
+
+static void
+nsim_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_buffer_t * b, nsim_node_ctx_t * ctx, u32 is_drop)
+{
+ if (b->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ nsim_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
+ t->expires = ctx->expires;
+ t->is_drop = is_drop;
+ t->is_lost = ctx->action[0] & NSIM_ACTION_DROP;
+ t->tx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ }
+}
+
+always_inline void
+nsim_buffer_fwd_lookup (nsim_main_t * nsm, vlib_buffer_t * b,
+ u32 * next, u8 is_cross_connect)
+{
+ if (is_cross_connect)
+ {
+ vnet_buffer (b)->sw_if_index[VLIB_TX] =
+ (vnet_buffer (b)->sw_if_index[VLIB_RX] == nsm->sw_if_index0) ?
+ nsm->sw_if_index1 : nsm->sw_if_index0;
+ *next =
+ (vnet_buffer (b)->sw_if_index[VLIB_TX] == nsm->sw_if_index0) ?
+ nsm->output_next_index0 : nsm->output_next_index1;
+ }
+ else /* output feature, even easier... */
+ {
+ u32 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ *next = nsm->output_next_index_by_sw_if_index[sw_if_index];
+ }
+}
+
+always_inline void
+nsim_dispatch_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
+ nsim_main_t * nsm, nsim_wheel_t * wp, vlib_buffer_t * b,
+ u32 bi, nsim_node_ctx_t * ctx, u8 is_cross_connect,
+ u8 is_trace)
+{
+ if (PREDICT_TRUE (!(ctx->action[0] & NSIM_ACTION_DROP)))
+ {
+ if (PREDICT_FALSE (ctx->action[0] & NSIM_ACTION_REORDER))
+ {
+ u32 next;
+ ctx->reord[0] = bi;
+ vnet_get_config_data (&ctx->fcm->config_main,
+ &b->current_config_index, &next, 0);
+ ctx->reord_nexts[0] = next;
+ ctx->reord += 1;
+ ctx->reord_nexts += 1;
+ goto trace;
+ }
+
+ nsim_wheel_entry_t *ep = wp->entries + wp->tail;
+ wp->tail++;
+ if (wp->tail == wp->wheel_size)
+ wp->tail = 0;
+ wp->cursize++;
+
+ ep->tx_time = ctx->expires;
+ ep->rx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ nsim_buffer_fwd_lookup (nsm, b, &ep->output_next_index,
+ is_cross_connect);
+ ep->tx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ ep->buffer_index = bi;
+ ctx->n_buffered += 1;
+ }
+ else
+ {
+ ctx->n_loss += 1;
+ ctx->drop[0] = bi;
+ ctx->drop += 1;
+ }
+
+trace:
+
+ if (PREDICT_FALSE (is_trace))
+ nsim_trace_buffer (vm, node, b, ctx, 0);
+
+ ctx->action += 1;
+}
+
always_inline uword
nsim_inline (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame, int is_trace,
int is_cross_connect)
{
nsim_main_t *nsm = &nsim_main;
- u32 n_left_from, *from;
- u32 *to_next, n_left_to_next;
- u32 drops[VLIB_FRAME_SIZE], *drop;
+ u32 n_left_from, *from, drops[VLIB_FRAME_SIZE], reorders[VLIB_FRAME_SIZE];
+ nsim_wheel_t *wp = nsm->wheel_by_thread[vm->thread_index];
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
- u8 is_drop[4];
- u16 nexts[VLIB_FRAME_SIZE], *next;
- u32 my_thread_index = vm->thread_index;
- nsim_wheel_t *wp = nsm->wheel_by_thread[my_thread_index];
- f64 now = vlib_time_now (vm);
- f64 expires = now + nsm->delay;
- f64 rnd[4];
- u32 no_buffer_error = node->errors[NSIM_ERROR_DROPPED];
- u32 loss_error = node->errors[NSIM_ERROR_LOSS];
- u32 buffered = 0;
- nsim_wheel_entry_t *ep = 0;
+ u16 reorders_nexts[VLIB_FRAME_SIZE];
+ u8 actions[VLIB_FRAME_SIZE];
+ nsim_node_ctx_t ctx;
ASSERT (wp);
vlib_get_buffers (vm, from, bufs, n_left_from);
b = bufs;
- next = nexts;
- drop = drops;
+
+ ctx.fcm = vnet_feature_get_config_main (nsm->arc_index);
+ ctx.n_loss = 0;
+ ctx.n_buffered = 0;
+ ctx.drop = drops;
+ ctx.reord = reorders;
+ ctx.reord_nexts = reorders_nexts;
+ ctx.action = actions;
+ ctx.expires = vlib_time_now (vm) + nsm->delay;
+
+ nsim_set_actions (nsm, b, &ctx, n_left_from);
while (n_left_from >= 8)
{
vlib_prefetch_buffer_header (b[6], STORE);
vlib_prefetch_buffer_header (b[7], STORE);
- memset (&is_drop, 0, sizeof (is_drop));
- next[0] = next[1] = next[2] = next[3] = NSIM_NEXT_DROP;
if (PREDICT_FALSE (wp->cursize + 4 >= wp->wheel_size))
goto slow_path;
- if (PREDICT_FALSE (nsm->drop_fraction != 0.0))
- {
- rnd[0] = random_f64 (&nsm->seed);
- rnd[1] = random_f64 (&nsm->seed);
- rnd[2] = random_f64 (&nsm->seed);
- rnd[3] = random_f64 (&nsm->seed);
-
- if (rnd[0] <= nsm->drop_fraction)
- {
- b[0]->error = loss_error;
- is_drop[0] = 1;
- }
- if (rnd[1] <= nsm->drop_fraction)
- {
- b[1]->error = loss_error;
- is_drop[1] = 1;
- }
- if (rnd[2] <= nsm->drop_fraction)
- {
- b[2]->error = loss_error;
- is_drop[2] = 1;
- }
- if (rnd[3] <= nsm->drop_fraction)
- {
- b[3]->error = loss_error;
- is_drop[3] = 1;
- }
- }
-
- if (PREDICT_TRUE (is_drop[0] == 0))
- {
- ep = wp->entries + wp->tail;
- wp->tail++;
- if (wp->tail == wp->wheel_size)
- wp->tail = 0;
- wp->cursize++;
-
- ep->tx_time = expires;
- ep->rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
- if (is_cross_connect)
- {
- ep->tx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX] =
- (vnet_buffer (b[0])->sw_if_index[VLIB_RX] ==
- nsm->sw_if_index0) ? nsm->sw_if_index1 : nsm->sw_if_index0;
- ep->output_next_index =
- (ep->tx_sw_if_index ==
- nsm->sw_if_index0) ? nsm->
- output_next_index0 : nsm->output_next_index1;
- }
- else /* output feature, even easier... */
- {
- ep->tx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
- ep->output_next_index =
- nsm->output_next_index_by_sw_if_index[ep->tx_sw_if_index];
- }
- ep->buffer_index = from[0];
- buffered++;
- }
- if (is_trace)
- {
- if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
- {
- nsim_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
- t->expires = expires;
- t->is_drop = is_drop[0];
- t->is_lost = b[0]->error == loss_error;
- t->tx_sw_if_index = (is_drop[0] == 0) ? ep->tx_sw_if_index : 0;
- }
- }
- if (PREDICT_TRUE (is_drop[1] == 0))
- {
- ep = wp->entries + wp->tail;
- wp->tail++;
- if (wp->tail == wp->wheel_size)
- wp->tail = 0;
- wp->cursize++;
-
- ep->tx_time = expires;
- ep->rx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
- if (is_cross_connect)
- {
- ep->tx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX] =
- (vnet_buffer (b[1])->sw_if_index[VLIB_RX] ==
- nsm->sw_if_index0) ? nsm->sw_if_index1 : nsm->sw_if_index0;
- ep->output_next_index =
- (ep->tx_sw_if_index ==
- nsm->sw_if_index0) ? nsm->
- output_next_index0 : nsm->output_next_index1;
- }
- else /* output feature, even easier... */
- {
- ep->tx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
- ep->output_next_index =
- nsm->output_next_index_by_sw_if_index[ep->tx_sw_if_index];
- }
- ep->buffer_index = from[1];
- buffered++;
- }
-
- if (is_trace)
- {
- if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
- {
- nsim_trace_t *t = vlib_add_trace (vm, node, b[1], sizeof (*t));
- t->expires = expires;
- t->is_drop = is_drop[1];
- t->is_lost = b[1]->error == loss_error;
- t->tx_sw_if_index = (is_drop[1] == 0) ? ep->tx_sw_if_index : 0;
- }
- }
-
- if (PREDICT_TRUE (is_drop[2] == 0))
- {
- ep = wp->entries + wp->tail;
- wp->tail++;
- if (wp->tail == wp->wheel_size)
- wp->tail = 0;
- wp->cursize++;
-
- ep->tx_time = expires;
- ep->rx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
- if (is_cross_connect)
- {
- ep->tx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_TX] =
- (vnet_buffer (b[2])->sw_if_index[VLIB_RX] ==
- nsm->sw_if_index0) ? nsm->sw_if_index1 : nsm->sw_if_index0;
- ep->output_next_index =
- (ep->tx_sw_if_index ==
- nsm->sw_if_index0) ? nsm->
- output_next_index0 : nsm->output_next_index1;
- }
- else /* output feature, even easier... */
- {
- ep->tx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
- ep->output_next_index =
- nsm->output_next_index_by_sw_if_index[ep->tx_sw_if_index];
- }
- ep->buffer_index = from[2];
- buffered++;
- }
-
- if (is_trace)
- {
- if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
- {
- nsim_trace_t *t = vlib_add_trace (vm, node, b[2], sizeof (*t));
- t->expires = expires;
- t->is_drop = is_drop[2];
- t->is_lost = b[2]->error == loss_error;
- t->tx_sw_if_index = (is_drop[2] == 0) ? ep->tx_sw_if_index : 0;
- }
- }
-
- if (PREDICT_TRUE (is_drop[3] == 0))
- {
- ep = wp->entries + wp->tail;
- wp->tail++;
- if (wp->tail == wp->wheel_size)
- wp->tail = 0;
- wp->cursize++;
-
- ep->tx_time = expires;
- ep->rx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
- if (is_cross_connect)
- {
- ep->tx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_TX] =
- (vnet_buffer (b[3])->sw_if_index[VLIB_RX] ==
- nsm->sw_if_index0) ? nsm->sw_if_index1 : nsm->sw_if_index0;
- ep->output_next_index =
- (ep->tx_sw_if_index ==
- nsm->sw_if_index0) ? nsm->
- output_next_index0 : nsm->output_next_index1;
- }
- else /* output feature, even easier... */
- {
- ep->tx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
- ep->output_next_index =
- nsm->output_next_index_by_sw_if_index[ep->tx_sw_if_index];
- }
- ep->buffer_index = from[3];
- buffered++;
- }
-
- if (is_trace)
- {
- if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
- {
- nsim_trace_t *t = vlib_add_trace (vm, node, b[3], sizeof (*t));
- t->expires = expires;
- t->is_drop = is_drop[3];
- t->is_lost = b[3]->error == loss_error;
- t->tx_sw_if_index = (is_drop[3] == 0) ? ep->tx_sw_if_index : 0;
- }
- }
-
- if (PREDICT_FALSE (is_drop[0]))
- *drop++ = from[0];
- if (PREDICT_FALSE (is_drop[1]))
- *drop++ = from[1];
- if (PREDICT_FALSE (is_drop[2]))
- *drop++ = from[2];
- if (PREDICT_FALSE (is_drop[3]))
- *drop++ = from[3];
+ nsim_dispatch_buffer (vm, node, nsm, wp, b[0], from[0], &ctx,
+ is_cross_connect, is_trace);
+ nsim_dispatch_buffer (vm, node, nsm, wp, b[1], from[1], &ctx,
+ is_cross_connect, is_trace);
+ nsim_dispatch_buffer (vm, node, nsm, wp, b[2], from[2], &ctx,
+ is_cross_connect, is_trace);
+ nsim_dispatch_buffer (vm, node, nsm, wp, b[3], from[3], &ctx,
+ is_cross_connect, is_trace);
b += 4;
- next += 4;
from += 4;
n_left_from -= 4;
}
while (n_left_from > 0)
{
- next[0] = NSIM_NEXT_DROP;
- is_drop[0] = 0;
- if (PREDICT_TRUE (wp->cursize < wp->wheel_size))
- {
- if (PREDICT_FALSE (nsm->drop_fraction != 0.0))
- {
- /* Get a random number on the closed interval [0,1] */
- rnd[0] = random_f64 (&nsm->seed);
- /* Drop the pkt? */
- if (rnd[0] <= nsm->drop_fraction)
- {
- b[0]->error = loss_error;
- is_drop[0] = 1;
- goto do_trace;
- }
- }
-
- ep = wp->entries + wp->tail;
- wp->tail++;
- if (wp->tail == wp->wheel_size)
- wp->tail = 0;
- wp->cursize++;
-
- ep->tx_time = expires;
- ep->rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
- if (is_cross_connect)
- {
- ep->tx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX] =
- (vnet_buffer (b[0])->sw_if_index[VLIB_RX] ==
- nsm->sw_if_index0) ? nsm->sw_if_index1 : nsm->sw_if_index0;
- ep->output_next_index =
- (ep->tx_sw_if_index ==
- nsm->sw_if_index0) ? nsm->
- output_next_index0 : nsm->output_next_index1;
- }
- else /* output feature, even easier... */
- {
- ep->tx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
- ep->output_next_index =
- nsm->output_next_index_by_sw_if_index[ep->tx_sw_if_index];
- }
- ep->buffer_index = from[0];
- buffered++;
- }
- else /* out of wheel space, drop pkt */
+ /* Drop if out of wheel space and not drop or reorder */
+ if (PREDICT_TRUE (wp->cursize < wp->wheel_size
+ || (ctx.action[0] & NSIM_ACTION_DROP)
+ || (ctx.action[0] & NSIM_ACTION_REORDER)))
{
- b[0]->error = no_buffer_error;
- is_drop[0] = 1;
+ nsim_dispatch_buffer (vm, node, nsm, wp, b[0], from[0], &ctx,
+ is_cross_connect, is_trace);
}
-
- do_trace:
- if (is_trace)
+ else
{
- if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
- {
- nsim_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
- t->expires = expires;
- t->is_drop = is_drop[0];
- t->is_lost = b[0]->error == loss_error;
- t->tx_sw_if_index = (is_drop[0] == 0) ? ep->tx_sw_if_index : 0;
- }
+ ctx.drop[0] = from[0];
+ ctx.drop += 1;
+ if (PREDICT_FALSE (is_trace))
+ nsim_trace_buffer (vm, node, b[0], &ctx, 1);
+ ctx.action += 1;
}
b += 1;
- next += 1;
- if (PREDICT_FALSE (is_drop[0]))
- {
- drop[0] = from[0];
- drop++;
- }
- from++;
+ from += 1;
n_left_from -= 1;
}
- if (PREDICT_FALSE (drop > drops))
- {
- u32 n_left_to_drop = drop - drops;
- drop = drops;
- while (n_left_to_drop > 0)
- {
- u32 this_copy_size;
- vlib_get_next_frame (vm, node, NSIM_NEXT_DROP, to_next,
- n_left_to_next);
- this_copy_size = clib_min (n_left_to_drop, n_left_to_next);
- clib_memcpy_fast (to_next, drop, this_copy_size * sizeof (u32));
- n_left_to_next -= this_copy_size;
- vlib_put_next_frame (vm, node, NSIM_NEXT_DROP, n_left_to_next);
- drop += this_copy_size;
- n_left_to_drop -= this_copy_size;
- }
+ if (PREDICT_FALSE (ctx.drop > drops))
+ {
+ u32 n_left_to_drop = ctx.drop - drops;
+ vlib_buffer_free (vm, drops, n_left_to_drop);
+ vlib_node_increment_counter (vm, node->node_index, NSIM_ERROR_LOSS,
+ ctx.n_loss);
+ vlib_node_increment_counter (vm, node->node_index, NSIM_ERROR_DROPPED,
+ n_left_to_drop - ctx.n_loss);
+ }
+ if (PREDICT_FALSE (ctx.reord > reorders))
+ {
+ u32 n_reordered = ctx.reord - reorders;
+ vlib_buffer_enqueue_to_next (vm, node, reorders, reorders_nexts,
+ n_reordered);
+ vlib_node_increment_counter (vm, node->node_index, NSIM_ERROR_REORDERED,
+ n_reordered);
}
vlib_node_increment_counter (vm, node->node_index,
- NSIM_ERROR_BUFFERED, buffered);
+ NSIM_ERROR_BUFFERED, ctx.n_buffered);
return frame->n_vectors;
}
* @brief VPP control-plane API messages for the network delay simulator
*/
-option version = "2.1.1";
+option version = "2.2.1";
import "vnet/interface_types.api";
/** \brief enable / disable the network delay simulation cross-connect
*/
autoreply define nsim_configure
{
+ option deprecated="v21.01";
/* Client identifier, set from api_main.my_client_index */
u32 client_index;
option vat_help = "delay <time> bandwidth <bw> [packet-size <nn>] [packets-per-drop <nnnn>]";
};
+/** \brief configure the network delay simulation cross-connect
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param delay_in_usec - microseconds of link delay to simulate
+ @param average_packet_size - average packet size for wheel sizing
+ @param bandwidth_in_bits_per_second - bps for wheel sizing
+*/
+autoreply define nsim_configure2
+{
+ /* Client identifier, set from api_main.my_client_index */
+ u32 client_index;
+
+ /* Arbitrary context, so client can match reply to request */
+ u32 context;
+
+ /* Configuration parameters */
+ u32 delay_in_usec;
+ u32 average_packet_size;
+ u64 bandwidth_in_bits_per_second;
+ u32 packets_per_drop;
+ u32 packets_per_reorder;
+ option vat_help = "delay <time> bandwidth <bw> [packet-size <nn>] [packets-per-drop <nnnn>]";
+};
return rv;
}
+static nsim_wheel_t *
+nsim_wheel_alloc (nsim_main_t * nsm, u32 wheel_slots)
+{
+ u32 pagesize = getpagesize ();
+ nsim_wheel_t *wp;
+
+ nsm->mmap_size = sizeof (nsim_wheel_t)
+ + wheel_slots * sizeof (nsim_wheel_entry_t);
+
+ nsm->mmap_size += pagesize - 1;
+ nsm->mmap_size &= ~(pagesize - 1);
+
+ wp = clib_mem_vm_alloc (nsm->mmap_size);
+ ASSERT (wp != 0);
+ wp->wheel_size = wheel_slots;
+ wp->cursize = 0;
+ wp->head = 0;
+ wp->tail = 0;
+ wp->entries = (void *) (wp + 1);
+
+ return wp;
+}
+
static int
nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
- f64 drop_fraction)
+ f64 drop_fraction, f64 reorder_fraction)
{
- u64 total_buffer_size_in_bytes, per_worker_buffer_size;
- u64 wheel_slots_per_worker;
- int i;
- int num_workers = vlib_num_workers ();
- u32 pagesize = getpagesize ();
+ u64 total_buffer_size_in_bytes, per_worker_buffer_size, wheel_slots_per_wrk;
+ int i, num_workers = vlib_num_workers ();
vlib_main_t *vm = nsm->vlib_main;
if (bandwidth == 0.0)
if (packet_size < 64.0 || packet_size > 9000.0)
return VNET_API_ERROR_INVALID_VALUE_3;
+ if (reorder_fraction > 0.0 && delay == 0.0)
+ return VNET_API_ERROR_INVALID_VALUE_4;
+
/* Toss the old wheel(s)... */
if (nsm->is_configured)
{
for (i = 0; i < vec_len (nsm->wheel_by_thread); i++)
{
- nsim_wheel_t *wp = nsm->wheel_by_thread[i];
- munmap (wp, nsm->mmap_size);
+ clib_mem_vm_free (nsm->wheel_by_thread[i], nsm->mmap_size);
nsm->wheel_by_thread[i] = 0;
}
}
nsm->delay = delay;
nsm->drop_fraction = drop_fraction;
+ nsm->reorder_fraction = reorder_fraction;
/* delay in seconds, bandwidth in bits/sec */
total_buffer_size_in_bytes = ((delay * bandwidth) / 8.0) + 0.5;
else
per_worker_buffer_size = total_buffer_size_in_bytes;
- wheel_slots_per_worker = per_worker_buffer_size / packet_size;
- wheel_slots_per_worker++;
+ wheel_slots_per_wrk = per_worker_buffer_size / packet_size;
+ wheel_slots_per_wrk++;
/* Save these for the show command */
nsm->bandwidth = bandwidth;
/* Initialize the output scheduler wheels */
i = (!nsm->poll_main_thread && num_workers) ? 1 : 0;
for (; i < num_workers + 1; i++)
- {
- nsim_wheel_t *wp;
-
- nsm->mmap_size = sizeof (nsim_wheel_t)
- + wheel_slots_per_worker * sizeof (nsim_wheel_entry_t);
-
- nsm->mmap_size += pagesize - 1;
- nsm->mmap_size &= ~(pagesize - 1);
-
- wp = clib_mem_vm_alloc (nsm->mmap_size);
- ASSERT (wp != 0);
- wp->wheel_size = wheel_slots_per_worker;
- wp->cursize = 0;
- wp->head = 0;
- wp->tail = 0;
- wp->entries = (void *) (wp + 1);
- nsm->wheel_by_thread[i] = wp;
- }
+ nsm->wheel_by_thread[i] = nsim_wheel_alloc (nsm, wheel_slots_per_wrk);
vlib_worker_thread_barrier_sync (vm);
{
vl_api_nsim_configure_reply_t *rmp;
nsim_main_t *nsm = &nsim_main;
- f64 delay, bandwidth, packet_size, drop_fraction;
+ f64 delay, bandwidth, packet_size, drop_fraction = 0.0, reorder_rate = 0.0;
u32 packets_per_drop;
int rv;
packets_per_drop = ntohl (mp->packets_per_drop);
if (packets_per_drop > 0)
drop_fraction = 1.0 / (f64) (packets_per_drop);
- else
- drop_fraction = 0.0;
- rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction);
+ rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction,
+ reorder_rate);
REPLY_MACRO (VL_API_NSIM_CONFIGURE_REPLY);
}
+static void
+vl_api_nsim_configure2_t_handler (vl_api_nsim_configure2_t * mp)
+{
+ vl_api_nsim_configure_reply_t *rmp;
+ nsim_main_t *nsm = &nsim_main;
+ f64 delay, bandwidth, packet_size, drop_fraction = 0.0, reorder_rate = 0.0;
+ u32 packets_per_drop, packets_per_reorder;
+ int rv;
+
+ delay = ((f64) (ntohl (mp->delay_in_usec))) * 1e-6;
+ bandwidth = (f64) (clib_net_to_host_u64 (mp->bandwidth_in_bits_per_second));
+ packet_size = (f64) (ntohl (mp->average_packet_size));
+
+ packets_per_drop = ntohl (mp->packets_per_drop);
+ if (packets_per_drop > 0)
+ drop_fraction = 1.0 / (f64) (packets_per_drop);
+
+ packets_per_reorder = ntohl (mp->packets_per_reorder);
+ if (packets_per_reorder > 0)
+ reorder_rate = 1.0 / (f64) packets_per_reorder;
+
+ rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction,
+ reorder_rate);
+
+ REPLY_MACRO (VL_API_NSIM_CONFIGURE2_REPLY);
+}
+
/*
* enable or disable the output_feature
/* Ask for a correctly-sized block of API message decode slots */
nsm->msg_id_base = setup_message_id_table ();
-
+ nsm->arc_index = nsm->vnet_main->interface_main.output_feature_arc_index;
return 0;
}
return 1;
}
+static u8 *
+format_nsim_config (u8 * s, va_list * args)
+{
+ int verbose = va_arg (*args, int);
+ nsim_main_t *nsm = &nsim_main;
+
+ s = format (s, "configuration\n");
+ s = format (s, " delay (ms): %.2f\n", nsm->delay * 1e3);
+ if (nsm->drop_fraction)
+ s = format (s, " drop fraction: %.5f\n", nsm->drop_fraction);
+ else
+ s = format (s, " drop fraction: 0\n");
+ if (nsm->reorder_fraction)
+ s = format (s, " reorder fraction: %.5f\n", nsm->reorder_fraction);
+ else
+ s = format (s, " reorder fraction: 0\n");
+ s = format (s, " packet size: %u\n", nsm->packet_size);
+ s = format (s, " throughput (Gbps): %.2f\n", nsm->bandwidth / 1e9);
+
+ if (verbose)
+ {
+ s = format (s, " poll main thread: %u\n", nsm->poll_main_thread);
+ s = format (s, " memory: %U bytes per thread %U bytes total\n",
+ format_memory_size, nsm->mmap_size, format_memory_size,
+ nsm->mmap_size * vlib_num_workers ());
+ }
+
+ s = format (s, "\n");
+
+ if (nsm->sw_if_index0 != 0)
+ {
+ s = format (s, "cross-connect\n %U and %U\n",
+ format_vnet_sw_if_index_name, nsm->vnet_main,
+ nsm->sw_if_index0, format_vnet_sw_if_index_name,
+ nsm->vnet_main, nsm->sw_if_index1);
+ }
+ else if (vec_len (nsm->output_next_index_by_sw_if_index))
+ {
+ int i;
+ s = format (s, "output feature arcs to:\n");
+ for (i = 0; i < vec_len (nsm->output_next_index_by_sw_if_index); i++)
+ {
+ if (nsm->output_next_index_by_sw_if_index[i] != ~0)
+ s = format (s, " %U %u\n", format_vnet_sw_if_index_name,
+ nsm->vnet_main, i, i);
+ }
+ }
+ else
+ {
+ s = format (s, " nsim not enabled\n");
+ }
+
+ return s;
+}
+
static clib_error_t *
set_nsim_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
+ f64 drop_fraction = 0.0, reorder_fraction = 0.0;
+ f64 delay, bandwidth, packet_size = 1500.0;
+ u32 packets_per_drop, packets_per_reorder;
nsim_main_t *nsm = &nsim_main;
- f64 delay, bandwidth;
- f64 packet_size = 1500.0;
- f64 drop_fraction = 0.0;
- u32 packets_per_drop;
- u32 num_workers = vlib_num_workers ();
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
if (packets_per_drop > 0)
drop_fraction = 1.0 / ((f64) packets_per_drop);
}
+ else if (unformat (input, "packets-per-reorder %d",
+ &packets_per_reorder))
+ {
+ if (packets_per_reorder > 0)
+ reorder_fraction = 1.0 / ((f64) packets_per_reorder);
+ }
else if (unformat (input, "drop-fraction %f", &drop_fraction))
{
if (drop_fraction < 0.0 || drop_fraction > 1.0)
return clib_error_return
(0, "drop fraction must be between zero and 1");
}
+ else if (unformat (input, "reorder-fraction %f", &reorder_fraction))
+ {
+ if (reorder_fraction < 0.0 || reorder_fraction > 1.0)
+ return clib_error_return
+ (0, "reorder fraction must be between zero and 1");
+ }
else if (unformat (input, "poll-main-thread"))
nsm->poll_main_thread = 1;
else
break;
}
- rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction);
+ rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction,
+ reorder_fraction);
switch (rv)
{
case VNET_API_ERROR_INVALID_VALUE_3:
return clib_error_return (0, "invalid packet size %.2f", packet_size);
+ case VNET_API_ERROR_INVALID_VALUE_4:
+ return clib_error_return (0, "invalid reorder fraction %.3f for "
+ "delay %.2f", reorder_fraction, delay);
+
default:
return clib_error_return (0, "error %d", rv);
break;
}
- vlib_cli_output (vm, "Configured link delay %.2f ms, %.2f ms round-trip",
- nsm->delay * 1e3, 2.0 * nsm->delay * 1e3);
- if (nsm->drop_fraction > 0.0)
- vlib_cli_output (vm, "... simulating a network drop fraction of %.5f",
- nsm->drop_fraction);
-
-
- if (num_workers)
- vlib_cli_output (vm, "Sim uses %llu bytes per thread, %llu bytes total",
- nsm->mmap_size, nsm->mmap_size * num_workers);
- else
- vlib_cli_output (vm, "Sim uses %llu bytes total", nsm->mmap_size);
+ vlib_cli_output (vm, "%U", format_nsim_config, 1);
return 0;
}
unformat_input_t * input, vlib_cli_command_t * cmd)
{
nsim_main_t *nsm = &nsim_main;
- u32 num_workers = vlib_num_workers ();
int verbose = 0;
if (nsm->is_configured == 0)
return clib_error_return (0, "Network simulator not configured");
- if (nsm->sw_if_index0 == 0)
- return clib_error_return (0, "Network simulator not enabled");
-
if (unformat (input, "verbose"))
verbose = 1;
- vlib_cli_output (vm, "Network simulator cross-connects %U and %U",
- format_vnet_sw_if_index_name,
- nsm->vnet_main, nsm->sw_if_index0,
- format_vnet_sw_if_index_name,
- nsm->vnet_main, nsm->sw_if_index1);
-
- vlib_cli_output (vm,
- "...inserting link delay of %.2f ms, %.2f ms round-trip",
- nsm->delay * 1e3, 2.0 * nsm->delay * 1e3);
-
- if (nsm->drop_fraction > 0.0)
- vlib_cli_output (vm, "... simulating a network drop fraction of %.5f",
- nsm->drop_fraction);
-
- if (verbose)
- {
-
- vlib_cli_output (vm, " Configured bandwidth: %.2f gbit/sec",
- nsm->bandwidth / 1e9);
- vlib_cli_output (vm, " Configured packet size: %f", nsm->packet_size);
- if (num_workers)
- vlib_cli_output
- (vm, " Sim uses %llu bytes per thread, %llu bytes total",
- nsm->mmap_size, nsm->mmap_size * num_workers);
- else
- vlib_cli_output (vm, " Sim uses %llu bytes total", nsm->mmap_size);
- }
+ vlib_cli_output (vm, "%U", format_nsim_config, verbose);
return 0;
}
CLIB_CACHE_LINE_ALIGN_MARK (pad);
} nsim_wheel_t;
+typedef struct nsim_node_ctx
+{
+ vnet_feature_config_main_t *fcm;
+ f64 expires;
+ u32 *drop;
+ u32 *reord;
+ u16 *reord_nexts;
+ u8 *action;
+ u64 n_buffered;
+ u64 n_loss;
+} nsim_node_ctx_t;
+
+#define foreach_nsm_action \
+ _(DROP, "Packet loss") \
+ _(REORDER, "Packet reorder")
+
+enum nsm_action_bit
+{
+#define _(sym, str) NSIM_ACTION_##sym##_BIT,
+ foreach_nsm_action
+#undef _
+};
+
+typedef enum nsm_action
+{
+#define _(sym, str) NSIM_ACTION_##sym = 1 << NSIM_ACTION_##sym##_BIT,
+ foreach_nsm_action
+#undef _
+} nsm_action_e;
+
typedef struct
{
/* API message ID base */
u16 msg_id_base;
+ /* output feature arc index */
+ u16 arc_index;
+
/* Two interfaces, cross-connected with delay */
u32 sw_if_index0, sw_if_index1;
u32 output_next_index0, output_next_index1;
f64 bandwidth;
f64 packet_size;
f64 drop_fraction;
+ f64 reorder_fraction;
u32 poll_main_thread;
u64 mmap_size;
return ret;
}
+static int
+api_nsim_configure2 (vat_main_t * vam)
+{
+ vl_api_nsim_configure2_t *mp;
+ unformat_input_t *i = vam->input;
+ f64 delay = 0.0, bandwidth = 0.0;
+ f64 packet_size = 1500.0;
+ u32 packets_per_drop = 0, packets_per_reorder;
+ int ret;
+
+ while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (i, "delay %U", unformat_delay, &delay))
+ ;
+ else if (unformat (i, "bandwidth %U", unformat_bandwidth, &bandwidth))
+ ;
+ else if (unformat (i, "packet-size %f", &packet_size))
+ ;
+ else if (unformat (i, "packets-per-drop %u", &packets_per_drop))
+ ;
+ else if (unformat (i, "packets-per-reorder %u", &packets_per_reorder))
+ ;
+ else
+ break;
+ }
+
+ if (delay == 0.0 || bandwidth == 0.0)
+ {
+ errmsg ("must specify delay and bandwidth");
+ return -99;
+ }
+
+ /* Construct the API message */
+ M (NSIM_CONFIGURE2, mp);
+ mp->delay_in_usec = (u32) (delay * 1e6);
+ mp->delay_in_usec = ntohl (mp->delay_in_usec);
+ mp->average_packet_size = (u32) (packet_size);
+ mp->average_packet_size = ntohl (mp->average_packet_size);
+ mp->bandwidth_in_bits_per_second = (u64) (bandwidth);
+ mp->bandwidth_in_bits_per_second =
+ clib_host_to_net_u64 (mp->bandwidth_in_bits_per_second);
+ mp->packets_per_drop = ntohl (packets_per_drop);
+ mp->packets_per_reorder = ntohl (packets_per_reorder);
+
+ /* send it... */
+ S (mp);
+
+ /* Wait for a reply... */
+ W (ret);
+ return ret;
+}
+
#include <nsim/nsim.api_test.c>
/*
_(IKE_NO_PORT, -163, "port not managed by IKE") \
_(UDP_PORT_TAKEN, -164, "UDP port already taken") \
_(EAGAIN, -165, "Retry stream call with cursor") \
+_(INVALID_VALUE_4, -166, "Invalid value #4") \
typedef enum
{
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