diff options
Diffstat (limited to 'src/vlibapi/node_serialize.c')
| -rw-r--r-- | src/vlibapi/node_serialize.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/src/vlibapi/node_serialize.c b/src/vlibapi/node_serialize.c new file mode 100644 index 00000000..4dc1a7d2 --- /dev/null +++ b/src/vlibapi/node_serialize.c @@ -0,0 +1,399 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include <vlib/vlib.h> + +#include <vppinfra/serialize.h> + +extern void vl_msg_api_barrier_sync (void); +extern void vl_msg_api_barrier_release (void); + +/* serialized representation of state strings */ + +#define foreach_state_string_code \ +_(STATE_DONE, "done") \ +_(STATE_DISABLED, "disabled") \ +_(STATE_TIME_WAIT, "time wait") \ +_(STATE_EVENT_WAIT, "event wait") \ +_(STATE_ANY_WAIT, "any wait") \ +_(STATE_POLLING, "polling") \ +_(STATE_INTERRUPT_WAIT, "interrupt wait") \ +_(STATE_INTERNAL, "internal") + +typedef enum +{ +#define _(a,b) a, + foreach_state_string_code +#undef _ +} state_string_enum_t; + +static char *state_strings[] = { +#define _(a,b) b, + foreach_state_string_code +#undef _ +}; + +/* + * Serialize a vlib_node_main_t. Appends the result to vector. + * Pass 0 to create a new vector, use vec_reset_length(vector) + * to recycle a vector / avoid memory allocation, etc. + * Switch heaps before/after to serialize into API client shared memory. + */ + +u8 * +vlib_node_serialize (vlib_node_main_t * nm, u8 * vector, + u32 max_threads, int include_nexts, int include_stats) +{ + serialize_main_t _sm, *sm = &_sm; + vlib_main_t *vm = vlib_get_main (); + vlib_node_t *n; + static vlib_node_t ***node_dups; + vlib_node_t **nodes; + static vlib_main_t **stat_vms; + vlib_main_t *stat_vm; + u8 *namep; + u32 name_bytes; + uword i, j, k; + u64 l, v, c, d; + state_string_enum_t state_code; + u32 threads_to_serialize; + + vec_reset_length (node_dups); + + if (vec_len (stat_vms) == 0) + { + if (vec_len (vlib_mains) == 0) + vec_add1 (stat_vms, vm); + else + { + for (i = 0; i < vec_len (vlib_mains); i++) + { + stat_vm = vlib_mains[i]; + if (stat_vm) + vec_add1 (stat_vms, stat_vm); + } + } + } + + threads_to_serialize = clib_min (max_threads, vec_len (stat_vms)); + + /* + * Barrier sync across stats scraping. + * Otherwise, the counts will be grossly inaccurate. + */ + vl_msg_api_barrier_sync (); + + for (j = 0; j < threads_to_serialize; j++) + { + stat_vm = stat_vms[j]; + nm = &stat_vm->node_main; + + if (include_stats) + { + for (i = 0; i < vec_len (nm->nodes); i++) + { + n = nm->nodes[i]; + vlib_node_sync_stats (stat_vm, n); + } + } + + nodes = vec_dup (nm->nodes); + + vec_add1 (node_dups, nodes); + } + vl_msg_api_barrier_release (); + + serialize_open_vector (sm, vector); + + serialize_likely_small_unsigned_integer (sm, vec_len (stat_vms)); + + for (j = 0; j < vec_len (stat_vms); j++) + { + stat_vm = stat_vms[j]; + nodes = node_dups[j]; + + serialize_likely_small_unsigned_integer (sm, vec_len (nodes)); + + for (i = 0; i < vec_len (nodes); i++) + { + n = nodes[i]; + + l = n->stats_total.clocks - n->stats_last_clear.clocks; + v = n->stats_total.vectors - n->stats_last_clear.vectors; + c = n->stats_total.calls - n->stats_last_clear.calls; + d = n->stats_total.suspends - n->stats_last_clear.suspends; + + state_code = STATE_INTERNAL; + + if (n->type == VLIB_NODE_TYPE_PROCESS) + { + vlib_process_t *p = vlib_get_process_from_node (vm, n); + + switch (p->flags + & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK + | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)) + { + default: + if (!(p->flags & VLIB_PROCESS_IS_RUNNING)) + state_code = STATE_DONE; + break; + + case VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK: + state_code = STATE_TIME_WAIT; + break; + + case VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT: + state_code = STATE_EVENT_WAIT; + break; + + case (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK): + state_code = + STATE_ANY_WAIT; + break; + } + } + else if (n->type != VLIB_NODE_TYPE_INTERNAL) + { + state_code = STATE_POLLING; + if (n->state == VLIB_NODE_STATE_DISABLED) + state_code = STATE_DISABLED; + else if (n->state == VLIB_NODE_STATE_INTERRUPT) + state_code = STATE_INTERRUPT_WAIT; + } + + /* See unserialize_cstring */ + name_bytes = vec_len (n->name); + serialize_likely_small_unsigned_integer (sm, name_bytes); + namep = serialize_get (sm, name_bytes); + memcpy (namep, n->name, name_bytes); + + serialize_likely_small_unsigned_integer (sm, (u64) state_code); + serialize_likely_small_unsigned_integer (sm, n->type); + + if (include_nexts) + { + serialize_likely_small_unsigned_integer + (sm, vec_len (n->next_nodes)); + for (k = 0; k < vec_len (n->next_nodes); k++) + serialize_likely_small_unsigned_integer (sm, + n->next_nodes[k]); + } + else + serialize_likely_small_unsigned_integer (sm, 0); + + if (include_stats) + { + /* stats present */ + serialize_likely_small_unsigned_integer (sm, 1); + /* total clocks */ + serialize_integer (sm, l, 8); + /* Total calls */ + serialize_integer (sm, c, 8); + /* Total vectors */ + serialize_integer (sm, v, 8); + /* Total suspends */ + serialize_integer (sm, d, 8); + } + else /* no stats */ + serialize_likely_small_unsigned_integer (sm, 0); + } + vec_free (nodes); + } + return (serialize_close_vector (sm)); +} + +vlib_node_t *** +vlib_node_unserialize (u8 * vector) +{ + serialize_main_t _sm, *sm = &_sm; + u32 nnodes, nnexts; + u32 nstat_vms; + vlib_node_t *node; + vlib_node_t **nodes; + vlib_node_t ***nodes_by_thread = 0; + int i, j, k; + u64 l, v, c, d; + state_string_enum_t state_code; + int stats_present; + + serialize_open_vector (sm, vector); + + nstat_vms = unserialize_likely_small_unsigned_integer (sm); + + vec_validate (nodes_by_thread, nstat_vms - 1); + _vec_len (nodes_by_thread) = 0; + + for (i = 0; i < nstat_vms; i++) + { + nnodes = unserialize_likely_small_unsigned_integer (sm); + + nodes = 0; + vec_validate (nodes, nnodes - 1); + vec_add1 (nodes_by_thread, nodes); + + for (j = 0; j < nnodes; j++) + { + node = 0; + vec_validate (node, 0); + nodes[j] = node; + + unserialize_cstring (sm, (char **) &(node->name)); + state_code = unserialize_likely_small_unsigned_integer (sm); + node->state_string = (u8 *) state_strings[state_code]; + + node->type = unserialize_likely_small_unsigned_integer (sm); + nnexts = unserialize_likely_small_unsigned_integer (sm); + if (nnexts > 0) + vec_validate (node->next_nodes, nnexts - 1); + for (k = 0; k < nnexts; k++) + node->next_nodes[k] = + unserialize_likely_small_unsigned_integer (sm); + + stats_present = unserialize_likely_small_unsigned_integer (sm); + + if (stats_present) + { + /* total clocks */ + unserialize_integer (sm, &l, 8); + node->stats_total.clocks = l; + node->stats_last_clear.clocks = 0; + + /* Total calls */ + unserialize_integer (sm, &c, 8); + node->stats_total.calls = c; + + /* Total vectors */ + unserialize_integer (sm, &v, 8); + node->stats_total.vectors = v; + + /* Total suspends */ + unserialize_integer (sm, &d, 8); + node->stats_total.suspends = d; + } + } + } + return nodes_by_thread; +} + +#if CLIB_DEBUG > 0 + +static clib_error_t * +test_node_serialize_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + vlib_node_main_t *nm = &vm->node_main; + u8 *vector = 0; + vlib_node_t ***nodes_by_thread; + vlib_node_t **nodes; + vlib_node_t *node; + vlib_node_t *next_node; + int i, j, k; + u32 max_threads = (u32) ~ 0; + int include_nexts = 0; + int include_stats = 0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "max-threads %d", &max_threads)) + ; + else if (unformat (input, "stats")) + include_stats = 1; + else if (unformat (input, "nexts")) + include_nexts = 1; + else + break; + } + + /* + * Keep the number of memcpy ops to a minimum (e.g. 1). + * The current size of the serialized vector is + * slightly under 4K. + */ + vec_validate (vector, 16383); + vec_reset_length (vector); + + vector = vlib_node_serialize (nm, vector, max_threads, + include_nexts, include_stats); + + vlib_cli_output (vm, "result vector %d bytes", vec_len (vector)); + + nodes_by_thread = vlib_node_unserialize (vector); + + vec_free (vector); + + for (i = 0; i < vec_len (nodes_by_thread); i++) + { + nodes = nodes_by_thread[i]; + + vlib_cli_output (vm, "thread %d", i); + + for (j = 0; j < vec_len (nodes); j++) + { + node = nodes[j]; + + vlib_cli_output (vm, "[%d] %s state %s", j, node->name, + node->state_string); + + vlib_cli_output + (vm, " clocks %lld calls %lld suspends" + " %lld vectors %lld", + node->stats_total.clocks, + node->stats_total.calls, + node->stats_total.suspends, node->stats_total.vectors); + + for (k = 0; k < vec_len (node->next_nodes); k++) + { + if (node->next_nodes[k] != ~0) + { + next_node = nodes[node->next_nodes[k]]; + vlib_cli_output (vm, " [%d] %s", k, next_node->name); + } + } + } + } + + for (j = 0; j < vec_len (nodes_by_thread); j++) + { + nodes = nodes_by_thread[j]; + + for (i = 0; i < vec_len (nodes); i++) + { + vec_free (nodes[i]->name); + vec_free (nodes[i]->next_nodes); + vec_free (nodes[i]); + } + vec_free (nodes); + } + vec_free (nodes_by_thread); + + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (test_node_serialize_node, static) = { + .path = "test node serialize", + .short_help = "test node serialize [max-threads NN] nexts stats", + .function = test_node_serialize_command_fn, +}; +/* *INDENT-ON* */ +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |