diff options
| -rw-r--r-- | extras/nsim/setup.nsim | 25 | ||||
| -rw-r--r-- | src/plugins/nsim/node.c | 343 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.api | 27 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.c | 214 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.h | 16 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_input.c | 116 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_test.c | 62 |
7 files changed, 654 insertions, 149 deletions
diff --git a/extras/nsim/setup.nsim b/extras/nsim/setup.nsim new file mode 100644 index 00000000000..999b92a901a --- /dev/null +++ b/extras/nsim/setup.nsim @@ -0,0 +1,25 @@ +set term pag off + +loop cre + +set int ip address loop0 192.168.2.1/24 +set int state loop0 up +set nsim delay 20 ms bandwidth 1 gbit packet-size 128 +comment { add drop-fraction 0.8 or some such} +nsim output-feature enable-disable loop0 + +packet-generator new { + name icmp + limit 0 + size 128-128 + interface local0 + node ethernet-input + data { + IP4: 0001.dead.beef -> 0002.dead.beef + ICMP: 192.168.1.2 -> 192.168.2.2 + incrementing 30 + } +} + +set int ip address pg0 192.168.1.1/24 +set ip arp loop0 192.168.2.2 0003.dead.beef diff --git a/src/plugins/nsim/node.c b/src/plugins/nsim/node.c index 25112abe299..559147b1280 100644 --- a/src/plugins/nsim/node.c +++ b/src/plugins/nsim/node.c @@ -80,20 +80,24 @@ typedef enum always_inline uword nsim_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame, int is_trace) + 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; 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; - int is_drop0; - u32 no_error = node->errors[NSIM_ERROR_BUFFERED]; + 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; ASSERT (wp); @@ -104,24 +108,246 @@ nsim_inline (vlib_main_t * vm, vlib_get_buffers (vm, from, bufs, n_left_from); b = bufs; next = nexts; + drop = drops; + + while (n_left_from >= 8) + { + vlib_prefetch_buffer_header (b[4], STORE); + vlib_prefetch_buffer_header (b[5], STORE); + 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_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[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[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_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[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[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_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_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]; + + b += 4; + next += 4; + from += 4; + n_left_from -= 4; + } + +slow_path: - /* There is no point in trying to do more than 1 pkt here */ while (n_left_from > 0) { - b[0]->error = no_error; next[0] = NSIM_NEXT_DROP; - is_drop0 = 0; + 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] */ - f64 rnd = random_f64 (&nsm->seed); + rnd[0] = random_f64 (&nsm->seed); /* Drop the pkt? */ - if (rnd <= nsm->drop_fraction) + if (rnd[0] <= nsm->drop_fraction) { b[0]->error = loss_error; - is_drop0 = 1; + is_drop[0] = 1; goto do_trace; } } @@ -133,18 +359,30 @@ nsim_inline (vlib_main_t * vm, wp->cursize++; ep->tx_time = expires; - ep->tx_sw_if_index = - (vnet_buffer (b[0])->sw_if_index[VLIB_RX] == nsm->sw_if_index0) - ? nsm->sw_if_index1 : nsm->sw_if_index0; - ep->current_length = vlib_buffer_length_in_chain (vm, b[0]); - ASSERT (ep->current_length <= WHEEL_ENTRY_DATA_SIZE); - clib_memcpy_fast (ep->data, vlib_buffer_get_current (b[0]), - ep->current_length); + 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_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 */ { b[0]->error = no_buffer_error; - is_drop0 = 1; + is_drop[0] = 1; } do_trace: @@ -154,17 +392,42 @@ nsim_inline (vlib_main_t * vm, { nsim_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->expires = expires; - t->is_drop = is_drop0; + t->is_drop = is_drop[0]; t->is_lost = b[0]->error == loss_error; - t->tx_sw_if_index = (is_drop0 == 0) ? ep->tx_sw_if_index : 0; + t->tx_sw_if_index = (is_drop[0] == 0) ? ep->tx_sw_if_index : 0; } } b += 1; next += 1; + if (PREDICT_FALSE (is_drop[0])) + { + drop[0] = from[0]; + drop++; + } + from++; n_left_from -= 1; } - vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + 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; + } + } + vlib_node_increment_counter (vm, node->node_index, + NSIM_ERROR_BUFFERED, buffered); return frame->n_vectors; } @@ -172,9 +435,11 @@ VLIB_NODE_FN (nsim_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) - return nsim_inline (vm, node, frame, 1 /* is_trace */ ); + return nsim_inline (vm, node, frame, + 1 /* is_trace */ , 1 /* is_cross_connect */ ); else - return nsim_inline (vm, node, frame, 0 /* is_trace */ ); + return nsim_inline (vm, node, frame, + 0 /* is_trace */ , 1 /* is_cross_connect */ ); } /* *INDENT-OFF* */ @@ -199,6 +464,40 @@ VLIB_REGISTER_NODE (nsim_node) = #endif /* CLIB_MARCH_VARIANT */ /* *INDENT-ON* */ +VLIB_NODE_FN (nsim_feature_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) + return nsim_inline (vm, node, frame, + 1 /* is_trace */ , 0 /* is_cross_connect */ ); + else + return nsim_inline (vm, node, frame, + 0 /* is_trace */ , 0 /* is_cross_connect */ ); +} + +/* *INDENT-OFF* */ +#ifndef CLIB_MARCH_VARIANT +VLIB_REGISTER_NODE (nsim_feature_node) = +{ + .name = "nsim-output-feature", + .vector_size = sizeof (u32), + .format_trace = format_nsim_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(nsim_error_strings), + .error_strings = nsim_error_strings, + + .n_next_nodes = NSIM_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [NSIM_NEXT_DROP] = "error-drop", + }, +}; +#endif /* CLIB_MARCH_VARIANT */ +/* *INDENT-ON* */ + /* * fd.io coding-style-patch-verification: ON * diff --git a/src/plugins/nsim/nsim.api b/src/plugins/nsim/nsim.api index 7bb84bafacd..42531cd2e0f 100644 --- a/src/plugins/nsim/nsim.api +++ b/src/plugins/nsim/nsim.api @@ -3,7 +3,7 @@ * @brief VPP control-plane API messages for the network delay simulator */ -option version = "1.1.0"; +option version = "2.1.0"; /** \brief enable / disable the network delay simulation cross-connect @param client_index - opaque cookie to identify the sender @@ -12,7 +12,7 @@ option version = "1.1.0"; @param sw_if_index0 - one interface to cross-connect @param sw_if_index1 - the other interface to cross-connect */ -autoreply define nsim_enable_disable +autoreply define nsim_cross_connect_enable_disable { /* Client identifier, set from api_main.my_client_index */ u32 client_index; @@ -28,6 +28,27 @@ autoreply define nsim_enable_disable u32 sw_if_index1; }; +/** \brief enable / disable the network delay simulation output feature + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param enable_disable - enable or disable the feature + @param sw_if_index0 - interface +*/ +autoreply define nsim_output_feature_enable_disable +{ + /* Client identifier, set from api_main.my_client_index */ + u32 client_index; + + /* Arbitrary context, so client can match reply to request */ + u32 context; + + /* Enable / disable the feature on the interfaces */ + u8 enable_disable; + + /* Interface handles */ + u32 sw_if_index; +}; + /** \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 @@ -49,3 +70,5 @@ autoreply define nsim_configure u64 bandwidth_in_bits_per_second; u32 packets_per_drop; }; + + diff --git a/src/plugins/nsim/nsim.c b/src/plugins/nsim/nsim.c index ce3396c5845..4120585c282 100644 --- a/src/plugins/nsim/nsim.c +++ b/src/plugins/nsim/nsim.c @@ -60,15 +60,16 @@ nsim_main_t nsim_main; /* List of message types that this plugin understands */ -#define foreach_nsim_plugin_api_msg \ -_(NSIM_ENABLE_DISABLE, nsim_enable_disable) \ +#define foreach_nsim_plugin_api_msg \ +_(NSIM_CROSS_CONNECT_ENABLE_DISABLE, nsim_cross_connect_enable_disable) \ +_(NSIM_OUTPUT_FEATURE_ENABLE_DISABLE, nsim_output_feature_enable_disable) \ _(NSIM_CONFIGURE, nsim_configure) -/* Action function shared between message handler and debug CLI */ +/* Action functions shared between message handlers and debug CLI */ int -nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0, - u32 sw_if_index1, int enable_disable) +nsim_cross_connect_enable_disable (nsim_main_t * nsm, u32 sw_if_index0, + u32 sw_if_index1, int enable_disable) { vnet_sw_interface_t *sw; vnet_hw_interface_t *hw; @@ -117,6 +118,41 @@ nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0, return rv; } +int +nsim_output_feature_enable_disable (nsim_main_t * nsm, u32 sw_if_index, + int enable_disable) +{ + vnet_sw_interface_t *sw; + vnet_hw_interface_t *hw; + int rv = 0; + + if (nsm->is_configured == 0) + return VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE; + + /* Utterly wrong? */ + if (pool_is_free_index (nsm->vnet_main->interface_main.sw_interfaces, + sw_if_index)) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + /* Not a physical port? */ + sw = vnet_get_sw_interface (nsm->vnet_main, sw_if_index); + if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + /* Add a graph arc for the input / wheel scraper node */ + hw = vnet_get_hw_interface (nsm->vnet_main, sw_if_index); + vec_validate_init_empty (nsm->output_next_index_by_sw_if_index, sw_if_index, + ~0); + /* Note: use the tx node, this pkt has already visited the output node... */ + nsm->output_next_index_by_sw_if_index[sw_if_index] = + vlib_node_add_next (nsm->vlib_main, nsim_input_node.index, + hw->tx_node_index); + + vnet_feature_enable_disable ("interface-output", "nsim-output-feature", + sw_if_index, enable_disable, 0, 0); + return rv; +} + static int nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, f64 drop_fraction) @@ -134,7 +170,7 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, if (delay == 0.0) return VNET_API_ERROR_INVALID_VALUE_2; - if (packet_size < 64.0 || packet_size > (f64) WHEEL_ENTRY_DATA_SIZE) + if (packet_size < 64.0 || packet_size > 9000.0) return VNET_API_ERROR_INVALID_VALUE_3; /* Toss the old wheel(s)... */ @@ -171,7 +207,6 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, nsm->packet_size = packet_size; vec_validate (nsm->wheel_by_thread, num_workers); - vec_validate (nsm->buffer_indices_by_thread, num_workers); /* Initialize the output scheduler wheels */ for (i = num_workers ? 1 : 0; i < num_workers + 1; i++) @@ -192,8 +227,6 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, wp->tail = 0; wp->entries = (void *) (wp + 1); nsm->wheel_by_thread[i] = wp; - vec_validate (nsm->buffer_indices_by_thread[i], VLIB_FRAME_SIZE - 1); - _vec_len (nsm->buffer_indices_by_thread[i]) = 0; } vlib_worker_thread_barrier_sync (vm); @@ -217,22 +250,27 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, * enable or disable the cross-connect */ static clib_error_t * -nsim_enable_disable_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) +nsim_cross_connect_enable_disable_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) { nsim_main_t *nsm = &nsim_main; + unformat_input_t _line_input, *line_input = &_line_input; u32 sw_if_index0 = ~0; u32 sw_if_index1 = ~0; int enable_disable = 1; u32 tmp; int rv; - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + /* Get a line of input. */ + if (!unformat_user (input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { - if (unformat (input, "disable")) + if (unformat (line_input, "disable")) enable_disable = 0; - else if (unformat (input, "%U", unformat_vnet_sw_interface, + else if (unformat (line_input, "%U", unformat_vnet_sw_interface, nsm->vnet_main, &tmp)) { if (sw_if_index0 == ~0) @@ -244,10 +282,13 @@ nsim_enable_disable_command_fn (vlib_main_t * vm, break; } + unformat_free (line_input); + if (sw_if_index0 == ~0 || sw_if_index1 == ~0) return clib_error_return (0, "Please specify two interfaces..."); - rv = nsim_enable_disable (nsm, sw_if_index0, sw_if_index1, enable_disable); + rv = nsim_cross_connect_enable_disable (nsm, sw_if_index0, + sw_if_index1, enable_disable); switch (rv) { @@ -284,34 +325,49 @@ nsim_enable_disable_command_fn (vlib_main_t * vm, * @cliexpar * To enable or disable network simulation cross-connect * @clistart - * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 - * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 disable + * nsim cross-connect enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 + * nsim cross-connect enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 disable * @cliend * @cliexcmd{nsim enable-disable <intfc> <intfc> [disable]} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (nsim_enable_disable_command, static) = { - .path = "nsim enable-disable", + .path = "nsim cross-connect enable-disable", .short_help = - "nsim enable-disable <interface-name-1> <interface-name-2> [disable]", - .function = nsim_enable_disable_command_fn, + "nsim cross-connect enable-disable <interface-name-1> " + "<interface-name-2> [disable]", + .function = nsim_cross_connect_enable_disable_command_fn, }; /* *INDENT-ON* */ /* API message handler */ -static void vl_api_nsim_enable_disable_t_handler - (vl_api_nsim_enable_disable_t * mp) +static void vl_api_nsim_cross_connect_enable_disable_t_handler + (vl_api_nsim_cross_connect_enable_disable_t * mp) { - vl_api_nsim_enable_disable_reply_t *rmp; + vl_api_nsim_cross_connect_enable_disable_reply_t *rmp; nsim_main_t *nsm = &nsim_main; int rv; - rv = nsim_enable_disable (nsm, ntohl (mp->sw_if_index0), - ntohl (mp->sw_if_index1), - (int) (mp->enable_disable)); + rv = nsim_cross_connect_enable_disable (nsm, ntohl (mp->sw_if_index0), + ntohl (mp->sw_if_index1), + (int) (mp->enable_disable)); - REPLY_MACRO (VL_API_NSIM_ENABLE_DISABLE_REPLY); + REPLY_MACRO (VL_API_NSIM_CROSS_CONNECT_ENABLE_DISABLE_REPLY); +} + +/* API message handler */ +static void vl_api_nsim_output_feature_enable_disable_t_handler + (vl_api_nsim_output_feature_enable_disable_t * mp) +{ + vl_api_nsim_output_feature_enable_disable_reply_t *rmp; + nsim_main_t *nsm = &nsim_main; + int rv; + + rv = nsim_output_feature_enable_disable (nsm, ntohl (mp->sw_if_index), + (int) (mp->enable_disable)); + + REPLY_MACRO (VL_API_NSIM_OUTPUT_FEATURE_ENABLE_DISABLE_REPLY); } /* API message handler */ @@ -340,6 +396,96 @@ vl_api_nsim_configure_t_handler (vl_api_nsim_configure_t * mp) } +/* + * enable or disable the output_feature + */ +static clib_error_t * +nsim_output_feature_enable_disable_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + nsim_main_t *nsm = &nsim_main; + unformat_input_t _line_input, *line_input = &_line_input; + u32 sw_if_index = ~0; + int enable_disable = 1; + int rv; + + /* Get a line of input. */ + if (!unformat_user (input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "disable")) + enable_disable = 0; + else if (unformat (line_input, "%U", unformat_vnet_sw_interface, + nsm->vnet_main, &sw_if_index)) + ; + else + { + clib_error_t *error = clib_error_return (0, "unknown input `%U'", + format_unformat_error, + line_input); + unformat_free (line_input); + return error; + } + } + + unformat_free (line_input); + + if (sw_if_index == ~0) + return clib_error_return (0, "Please specify one interface..."); + + rv = nsim_output_feature_enable_disable (nsm, sw_if_index, enable_disable); + + switch (rv) + { + case 0: + break; + + case VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE: + return clib_error_return (0, "Not configured, please 'set nsim' first"); + + case VNET_API_ERROR_INVALID_SW_IF_INDEX: + return clib_error_return + (0, "Invalid interface, only works on physical ports"); + break; + + case VNET_API_ERROR_UNIMPLEMENTED: + return clib_error_return (0, + "Device driver doesn't support redirection"); + break; + + default: + return clib_error_return + (0, "nsim_output_feature_enable_disable returned %d", rv); + } + return 0; +} + +/*? + * Enable or disable network simulation output feature on an interface + * The network simulator must have already been configured, see + * the "nsim_configure" command. + * + * @cliexpar + * To enable or disable network simulation output feature + * @clistart + * nsim output-feature enable-disable TenGigabitEthernet2/0/0 + * nsim output-feature enable-disable TenGigabitEthernet2/0/0 disable + * @cliend + * @cliexcmd{nsim output-feature enable-disable <intfc> [disable]} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (nsim_output_feature_enable_disable_command, static) = +{ + .path = "nsim output-feature enable-disable", + .short_help = + "nsim output-feature enable-disable <interface-name> [disable]", + .function = nsim_output_feature_enable_disable_command_fn, +}; +/* *INDENT-ON* */ + /* Set up the API message handling tables */ static clib_error_t * nsim_plugin_api_hookup (vlib_main_t * vm) @@ -409,6 +555,15 @@ VNET_FEATURE_INIT (nsim, static) = /* *INDENT-ON */ /* *INDENT-OFF* */ +VNET_FEATURE_INIT (nsim_feature, static) = +{ + .arc_name = "interface-output", + .node_name = "nsim-output-feature", + .runs_before = VNET_FEATURES ("interface-tx"), +}; +/* *INDENT-ON */ + +/* *INDENT-OFF* */ VLIB_PLUGIN_REGISTER () = { .version = VPP_BUILD_VER, @@ -541,7 +696,8 @@ set_nsim_command_fn (vlib_main_t * vm, VLIB_CLI_COMMAND (set_nsim_command, static) = { .path = "set nsim", - .short_help = "set nsim delay <time> bandwidth <bps> packet-size <nbytes>", + .short_help = "set nsim delay <time> bandwidth <bps> packet-size <nbytes>\n" + " [packets-per-drop <nn>][drop-fraction <f64: 0.0 - 1.0>]", .function = set_nsim_command_fn, }; /* *INDENT-ON*/ diff --git a/src/plugins/nsim/nsim.h b/src/plugins/nsim/nsim.h index c5264ecb244..6afe32dc7f7 100644 --- a/src/plugins/nsim/nsim.h +++ b/src/plugins/nsim/nsim.h @@ -25,15 +25,14 @@ #include <vppinfra/hash.h> #include <vppinfra/error.h> -#define WHEEL_ENTRY_DATA_SIZE 1536 /* an even multiple of 64, pls */ - typedef struct { f64 tx_time; + u32 rx_sw_if_index; u32 tx_sw_if_index; - u32 current_length; - CLIB_CACHE_LINE_ALIGN_MARK (pad); - u8 data[WHEEL_ENTRY_DATA_SIZE]; + u32 output_next_index; + u32 buffer_index; + u32 pad; /* pad to 32-bytes */ } nsim_wheel_entry_t; typedef struct @@ -54,12 +53,15 @@ typedef struct /* Two interfaces, cross-connected with delay */ u32 sw_if_index0, sw_if_index1; u32 output_next_index0, output_next_index1; + + /* N interfaces, using the output feature */ + u32 *output_next_index_by_sw_if_index; + /* Random seed for loss-rate simulation */ u32 seed; - /* Per-thread buffer / scheduler wheels */ + /* Per-thread scheduler wheels */ nsim_wheel_t **wheel_by_thread; - u32 **buffer_indices_by_thread; /* Config parameters */ f64 delay; diff --git a/src/plugins/nsim/nsim_input.c b/src/plugins/nsim/nsim_input.c index 44c9f535f92..def6fcd9f26 100644 --- a/src/plugins/nsim/nsim_input.c +++ b/src/plugins/nsim/nsim_input.c @@ -24,7 +24,7 @@ typedef struct { f64 expired; - u32 tx_sw_if_index; + u32 next_index; } nsim_tx_trace_t; #ifndef CLIB_MARCH_VARIANT @@ -36,22 +36,20 @@ format_nsim_tx_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); nsim_tx_trace_t *t = va_arg (*args, nsim_tx_trace_t *); - s = format (s, "NSIM: tx at %.6f sw_if_index %d", - t->expired, t->tx_sw_if_index); + s = format (s, "NSIM: tx at %.6f next_index %d", t->expired, t->next_index); return s; } #endif /* CLIB_MARCH_VARIANT */ -#define foreach_nsim_tx_error \ -_(TX, "Packets transmitted") \ -_(DROPPED, "No buffer drops") +#define foreach_nsim_tx_error \ +_(TRANSMITTED, "Packets transmitted") typedef enum { #define _(sym,str) NSIM_TX_ERROR_##sym, foreach_nsim_tx_error #undef _ - NSIM_N_ERROR, + NSIM_TX_N_ERROR, } nsim_tx_error_t; #ifndef CLIB_MARCH_VARIANT @@ -74,12 +72,9 @@ nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, { nsim_main_t *nsm = &nsim_main; u32 my_thread_index = vm->thread_index; - u32 *my_buffer_cache = nsm->buffer_indices_by_thread[my_thread_index]; nsim_wheel_t *wp = nsm->wheel_by_thread[my_thread_index]; - u32 n_trace = vlib_get_trace_count (vm, node); f64 now = vlib_time_now (vm); - uword n_rx_packets = 0; - vlib_buffer_t *b0; + uword n_tx_packets = 0; u32 bi0, next0; u32 *to_next; u32 next_index; @@ -93,85 +88,30 @@ nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, /* First entry on the wheel isn't expired? */ ep = wp->entries + wp->head; if (ep->tx_time > now) - return n_rx_packets; + return n_tx_packets; - /* - * We use per-thread buffer caches, so we need the freelist to - * initialize them... - */ next_index = node->cached_next_index; - while (wp->cursize) + /* Be aware: this is not the usual coding pattern */ + while (wp->cursize && ep->tx_time <= now) { - /* Be aware: this is not the usual coding pattern */ + vlib_buffer_t *b0; + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - while (n_left_to_next > 0 && ep->tx_time <= now) + while (n_left_to_next > 0) { - /* Out of local buffer cache? */ - if (PREDICT_FALSE (_vec_len (my_buffer_cache) == 0)) - { - u32 n = - vlib_buffer_alloc (vm, my_buffer_cache, VLIB_FRAME_SIZE); - _vec_len (my_buffer_cache) = n; - - /* Ugh, drop the rest of the expired entries */ - if (n == 0) - { - u32 drops = 0; - while (ep->tx_time <= now && wp->cursize) - { - wp->head++; - if (wp->head == wp->wheel_size) - wp->head = 0; - ep = wp->entries + wp->head; - wp->cursize--; - drops++; - } - /* Count the drops */ - vlib_node_increment_counter (vm, node->node_index, - NSIM_TX_ERROR_DROPPED, drops); - /* Ship any pkts we already processed */ - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - return n_rx_packets + drops; - } - } - - /* Allocate a buffer */ - bi0 = my_buffer_cache[_vec_len (my_buffer_cache) - 1]; - _vec_len (my_buffer_cache) -= 1; + /* prefetch one line / 2 entries ahead */ + if ((((uword) ep) & (CLIB_CACHE_LINE_BYTES - 1)) == 0) + CLIB_PREFETCH ((ep + 2), CLIB_CACHE_LINE_BYTES, LOAD); + /* Pick up buffer from the wheel */ + bi0 = ep->buffer_index; to_next[0] = bi0; to_next += 1; n_left_to_next -= 1; - b0 = vlib_get_buffer (vm, bi0); - /* Initialize the buffer */ - - b0->current_data = 0; - b0->current_length = ep->current_length; - - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); - - if (PREDICT_FALSE (n_trace)) - { - nsim_tx_trace_t *t0; - vlib_trace_buffer (vm, node, next_index, b0, - 0 /* follow_chain */ ); - t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); - t0->expired = ep->tx_time; - t0->tx_sw_if_index = ep->tx_sw_if_index; - } - - /* Copy data from the ring */ - clib_memcpy_fast (b0->data, ep->data, ep->current_length); - b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = ep->tx_sw_if_index; - vnet_buffer (b0)->sw_if_index[VLIB_RX] = - (ep->tx_sw_if_index == nsm->sw_if_index0) ? nsm->sw_if_index1 : - nsm->sw_if_index0; - next0 = (ep->tx_sw_if_index == nsm->sw_if_index0) ? - nsm->output_next_index0 : nsm->output_next_index1; + next0 = ep->output_next_index; /* verify speculative enqueue, maybe switch current next frame */ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, @@ -183,7 +123,19 @@ nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, wp->head = 0; wp->cursize--; ep = wp->entries + wp->head; - n_rx_packets++; + n_tx_packets++; + + if (is_trace) + { + b0 = vlib_get_buffer (vm, ep->buffer_index); + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + nsim_tx_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->expired = now; + t->next_index = next0; + } + } /* Out of ring entries? */ if (PREDICT_FALSE (wp->cursize == 0)) @@ -196,7 +148,9 @@ nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (ep->tx_time > now) break; } - return n_rx_packets; + vlib_node_increment_counter (vm, node->node_index, + NSIM_TX_ERROR_TRANSMITTED, n_tx_packets); + return n_tx_packets; } VLIB_NODE_FN (nsim_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -221,7 +175,7 @@ VLIB_REGISTER_NODE (nsim_input_node) = .format_trace = format_nsim_tx_trace, - .n_errors = NSIM_N_ERROR, + .n_errors = NSIM_TX_N_ERROR, .error_strings = nsim_tx_error_strings, }; #endif /* CLIB_MARCH_VARIANT */ diff --git a/src/plugins/nsim/nsim_test.c b/src/plugins/nsim/nsim_test.c index 7123703fd42..35f222eadf0 100644 --- a/src/plugins/nsim/nsim_test.c +++ b/src/plugins/nsim/nsim_test.c @@ -60,7 +60,8 @@ nsim_test_main_t nsim_test_main; #include <vlibapi/vat_helper_macros.h> #define foreach_standard_reply_retval_handler \ -_(nsim_enable_disable_reply) \ +_(nsim_cross_connect_enable_disable_reply) \ +_(nsim_output_feature_enable_disable_reply) \ _(nsim_configure_reply) #define _(n) \ @@ -83,19 +84,22 @@ foreach_standard_reply_retval_handler; * Table of message reply handlers, must include boilerplate handlers * we just generated */ -#define foreach_vpe_api_reply_msg \ -_(NSIM_ENABLE_DISABLE_REPLY, nsim_enable_disable_reply) \ +#define foreach_vpe_api_reply_msg \ +_(NSIM_CROSS_CONNECT_ENABLE_DISABLE_REPLY, \ +nsim_cross_connect_enable_disable_reply) \ +_(NSIM_OUTPUT_FEATURE_ENABLE_DISABLE_REPLY, \ +nsim_output_feature_enable_disable_reply) \ _(NSIM_CONFIGURE_REPLY, nsim_configure_reply) static int -api_nsim_enable_disable (vat_main_t * vam) +api_nsim_cross_connect_enable_disable (vat_main_t * vam) { unformat_input_t *i = vam->input; int enable_disable = 1; u32 sw_if_index0 = ~0; u32 sw_if_index1 = ~0; u32 tmp; - vl_api_nsim_enable_disable_t *mp; + vl_api_nsim_cross_connect_enable_disable_t *mp; int ret; /* Parse args required to build the message */ @@ -128,7 +132,7 @@ api_nsim_enable_disable (vat_main_t * vam) } /* Construct the API message */ - M (NSIM_ENABLE_DISABLE, mp); + M (NSIM_CROSS_CONNECT_ENABLE_DISABLE, mp); mp->sw_if_index0 = ntohl (sw_if_index0); mp->sw_if_index1 = ntohl (sw_if_index1); mp->enable_disable = enable_disable; @@ -141,6 +145,47 @@ api_nsim_enable_disable (vat_main_t * vam) return ret; } +static int +api_nsim_output_feature_enable_disable (vat_main_t * vam) +{ + unformat_input_t *i = vam->input; + int enable_disable = 1; + u32 sw_if_index = ~0; + vl_api_nsim_output_feature_enable_disable_t *mp; + int ret; + + /* Parse args required to build the message */ + while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) + { + if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index)) + ; + else if (unformat (i, "sw_if_index %d", &sw_if_index)) + ; + else if (unformat (i, "disable")) + enable_disable = 0; + else + break; + } + + if (sw_if_index == ~0) + { + errmsg ("missing interface name / explicit sw_if_index number \n"); + return -99; + } + + /* Construct the API message */ + M (NSIM_OUTPUT_FEATURE_ENABLE_DISABLE, mp); + mp->sw_if_index = ntohl (sw_if_index); + mp->enable_disable = enable_disable; + + /* send it... */ + S (mp); + + /* Wait for a reply... */ + W (ret); + return ret; +} + static uword unformat_delay (unformat_input_t * input, va_list * args) { @@ -229,9 +274,10 @@ api_nsim_configure (vat_main_t * vam) * and that the data plane plugin processes */ #define foreach_vpe_api_msg \ -_(nsim_enable_disable, \ +_(nsim_cross_connect_enable_disable, \ "[<intfc0> | sw_if_index <swif0>] [<intfc1> | sw_if_index <swif1>] [disable]") \ -_(nsim_configure, "delay <time> bandwidth <bw> [packet-size <nn>]" \ +_(nsim_output_feature_enable_disable,"[<intfc> | sw_if_index <nnn> [disable]") \ +_(nsim_configure, "delay <time> bandwidth <bw> [packet-size <nn>]" \ "[packets-per-drop <nnnn>]") static void |