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Add new CELL_STATS event.
Jointly authored with Rob Jansen <jansen@cs.umn.edu>.
This commit is contained in:
Karsten Loesing
parent
8d1f78c556
commit
c386d2d6ce
165
src/or/control.c
165
src/or/control.c
@ -83,7 +83,8 @@
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#define EVENT_SIGNAL 0x0018
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#define EVENT_CONF_CHANGED 0x0019
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#define EVENT_CONN_BW 0x001A
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#define EVENT_MAX_ 0x001A
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#define EVENT_CELL_STATS 0x001B
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#define EVENT_MAX_ 0x001B
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/* If EVENT_MAX_ ever hits 0x0020, we need to make the mask wider. */
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/** Bitfield: The bit 1<<e is set if <b>any</b> open control
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@ -960,6 +961,7 @@ static const struct control_event_t control_event_table[] = {
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{ EVENT_SIGNAL, "SIGNAL" },
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{ EVENT_CONF_CHANGED, "CONF_CHANGED"},
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{ EVENT_CONN_BW, "CONN_BW" },
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{ EVENT_CELL_STATS, "CELL_STATS" },
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{ 0, NULL },
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};
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@ -3956,6 +3958,167 @@ control_event_conn_bandwidth_used(void)
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return 0;
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}
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extern circuit_t *global_circuitlist;
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/** Convert the cell <b>command</b> into a lower-case, human-readable
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* string. */
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static const char *
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cell_command_to_string(uint8_t command)
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{
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switch (command) {
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case CELL_PADDING: return "padding";
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case CELL_CREATE: return "create";
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case CELL_CREATED: return "created";
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case CELL_RELAY: return "relay";
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case CELL_DESTROY: return "destroy";
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case CELL_CREATE_FAST: return "create_fast";
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case CELL_CREATED_FAST: return "created_fast";
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case CELL_VERSIONS: return "versions";
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case CELL_NETINFO: return "netinfo";
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case CELL_RELAY_EARLY: return "relay_early";
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case CELL_CREATE2: return "create2";
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case CELL_CREATED2: return "created2";
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case CELL_VPADDING: return "vpadding";
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case CELL_CERTS: return "certs";
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case CELL_AUTH_CHALLENGE: return "auth_challenge";
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case CELL_AUTHENTICATE: return "authenticate";
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case CELL_AUTHORIZE: return "authorize";
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default: return "unrecognized";
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}
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}
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/** Helper: append a cell statistics string to <code>event_parts</code>,
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* prefixed with <code>key</code>=. Statistics consist of comma-separated
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* key:value pairs with lower-case command strings as keys and cell
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* numbers or total waiting times as values. A key:value pair is included
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* if the entry in <code>include_if_positive</code> is positive, but with
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* the (possibly zero) entry from <code>number_to_include</code>. If no
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* entry in <code>include_if_positive</code> is positive, no string will
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* be added to <code>event_parts</code>. */
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static void
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append_cell_stats_by_command(smartlist_t *event_parts, const char *key,
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uint64_t *include_if_positive,
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uint64_t *number_to_include)
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{
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smartlist_t *key_value_strings = smartlist_new();
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int i;
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for (i = 0; i <= CELL_MAX_; i++) {
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if (include_if_positive[i] > 0) {
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smartlist_add_asprintf(key_value_strings, "%s:"U64_FORMAT,
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cell_command_to_string(i),
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U64_PRINTF_ARG(number_to_include[i]));
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}
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}
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if (key_value_strings->num_used > 0) {
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char *joined = smartlist_join_strings(key_value_strings, ",", 0, NULL);
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char *result;
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tor_asprintf(&result, "%s=%s", key, joined);
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smartlist_add(event_parts, result);
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SMARTLIST_FOREACH(key_value_strings, char *, cp, tor_free(cp));
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tor_free(joined);
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}
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smartlist_free(key_value_strings);
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}
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/** A second or more has elapsed: tell any interested control connection
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* how many cells have been processed for a given circuit. */
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int
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control_event_circuit_cell_stats(void)
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{
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/* These arrays temporarily consume slightly over 6 KiB on the stack
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* every second, most of which are wasted for the non-existant commands
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* between CELL_RELAY_EARLY (9) and CELL_VPADDING (128). But nothing
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* beats the stack when it comes to performance. */
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uint64_t added_cells_appward[CELL_MAX_ + 1],
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added_cells_exitward[CELL_MAX_ + 1],
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removed_cells_appward[CELL_MAX_ + 1],
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removed_cells_exitward[CELL_MAX_ + 1],
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total_time_appward[CELL_MAX_ + 1],
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total_time_exitward[CELL_MAX_ + 1];
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circuit_t *circ;
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if (!get_options()->TestingTorNetwork ||
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!EVENT_IS_INTERESTING(EVENT_CELL_STATS))
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return 0;
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for (circ = global_circuitlist; circ; circ = circ->next) {
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smartlist_t *event_parts;
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char *event_string;
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if (!circ->testing_cell_stats)
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continue;
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memset(added_cells_appward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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memset(added_cells_exitward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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memset(removed_cells_appward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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memset(removed_cells_exitward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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memset(total_time_appward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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memset(total_time_exitward, 0, (CELL_MAX_ + 1) * sizeof(uint64_t));
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SMARTLIST_FOREACH_BEGIN(circ->testing_cell_stats,
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testing_cell_stats_entry_t *, ent) {
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tor_assert(ent->command <= CELL_MAX_);
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if (!ent->removed && !ent->exit_ward) {
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added_cells_appward[ent->command] += 1;
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} else if (!ent->removed && ent->exit_ward) {
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added_cells_exitward[ent->command] += 1;
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} else if (!ent->exit_ward) {
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removed_cells_appward[ent->command] += 1;
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total_time_appward[ent->command] += ent->waiting_time * 10;
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} else {
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removed_cells_exitward[ent->command] += 1;
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total_time_exitward[ent->command] += ent->waiting_time * 10;
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}
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tor_free(ent);
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} SMARTLIST_FOREACH_END(ent);
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smartlist_free(circ->testing_cell_stats);
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circ->testing_cell_stats = NULL;
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event_parts = smartlist_new();
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if (CIRCUIT_IS_ORIGIN(circ)) {
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origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
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char *id_string;
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tor_asprintf(&id_string, "ID=%lu",
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(unsigned long)ocirc->global_identifier);
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smartlist_add(event_parts, id_string);
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} else {
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or_circuit_t *or_circ = TO_OR_CIRCUIT(circ);
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char *queue_string, *conn_string;
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tor_asprintf(&queue_string, "InboundQueue=%lu",
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(unsigned long)or_circ->p_circ_id);
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tor_asprintf(&conn_string, "InboundConn="U64_FORMAT,
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U64_PRINTF_ARG(or_circ->p_chan->global_identifier));
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smartlist_add(event_parts, queue_string);
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smartlist_add(event_parts, conn_string);
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append_cell_stats_by_command(event_parts, "InboundAdded",
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added_cells_appward, added_cells_appward);
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append_cell_stats_by_command(event_parts, "InboundRemoved",
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removed_cells_appward, removed_cells_appward);
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append_cell_stats_by_command(event_parts, "InboundTime",
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removed_cells_appward, total_time_appward);
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}
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if (circ->n_chan) {
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char *queue_string, *conn_string;
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tor_asprintf(&queue_string, "OutboundQueue=%lu",
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(unsigned long)circ->n_circ_id);
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tor_asprintf(&conn_string, "OutboundConn="U64_FORMAT,
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U64_PRINTF_ARG(circ->n_chan->global_identifier));
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smartlist_add(event_parts, queue_string);
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smartlist_add(event_parts, conn_string);
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append_cell_stats_by_command(event_parts, "OutboundAdded",
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added_cells_exitward, added_cells_exitward);
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append_cell_stats_by_command(event_parts, "OutboundRemoved",
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removed_cells_exitward, removed_cells_exitward);
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append_cell_stats_by_command(event_parts, "OutboundTime",
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removed_cells_exitward, total_time_exitward);
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}
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event_string = smartlist_join_strings(event_parts, " ", 0, NULL);
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send_control_event(EVENT_CELL_STATS, ALL_FORMATS,
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"650 CELL_STATS %s\r\n", event_string);
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SMARTLIST_FOREACH(event_parts, char *, cp, tor_free(cp));
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smartlist_free(event_parts);
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tor_free(event_string);
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}
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return 0;
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}
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/** A second or more has elapsed: tell any interested control
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* connections how much bandwidth we used. */
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int
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@ -52,6 +52,7 @@ int control_event_stream_bandwidth(edge_connection_t *edge_conn);
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int control_event_stream_bandwidth_used(void);
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int control_event_conn_bandwidth(connection_t *conn);
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int control_event_conn_bandwidth_used(void);
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int control_event_circuit_cell_stats(void);
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void control_event_logmsg(int severity, uint32_t domain, const char *msg);
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int control_event_descriptors_changed(smartlist_t *routers);
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int control_event_address_mapped(const char *from, const char *to,
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@ -1641,6 +1641,7 @@ second_elapsed_callback(periodic_timer_t *timer, void *arg)
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control_event_bandwidth_used((uint32_t)bytes_read,(uint32_t)bytes_written);
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control_event_stream_bandwidth_used();
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control_event_conn_bandwidth_used();
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control_event_circuit_cell_stats();
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if (server_mode(options) &&
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!net_is_disabled() &&
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36
src/or/or.h
36
src/or/or.h
@ -839,6 +839,7 @@ typedef enum {
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#define CELL_AUTH_CHALLENGE 130
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#define CELL_AUTHENTICATE 131
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#define CELL_AUTHORIZE 132
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#define CELL_MAX_ 132
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/** How long to test reachability before complaining to the user. */
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#define TIMEOUT_UNTIL_UNREACHABILITY_COMPLAINT (20*60)
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@ -1087,6 +1088,21 @@ typedef struct insertion_time_queue_t {
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struct insertion_time_elem_t *last; /**< Last element in queue. */
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} insertion_time_queue_t;
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/** Number of cells with the same command consecutively added to a circuit
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* queue; used for cell statistics only in TestingTorNetwork mode. */
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typedef struct insertion_command_elem_t {
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struct insertion_command_elem_t *next; /**< Next element in queue. */
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/** Which command did these consecutively added cells have? */
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uint8_t command;
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unsigned counter; /**< How many cells were inserted? */
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} insertion_command_elem_t;
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/** Queue of insertion commands. */
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typedef struct insertion_command_queue_t {
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struct insertion_command_elem_t *first; /**< First element in queue. */
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struct insertion_command_elem_t *last; /**< Last element in queue. */
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} insertion_command_queue_t;
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/** A queue of cells on a circuit, waiting to be added to the
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* or_connection_t's outbuf. */
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typedef struct cell_queue_t {
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@ -1094,6 +1110,8 @@ typedef struct cell_queue_t {
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packed_cell_t *tail; /**< The last cell, or NULL if the queue is empty. */
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int n; /**< The number of cells in the queue. */
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insertion_time_queue_t *insertion_times; /**< Insertion times of cells. */
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/** Commands of inserted cells. */
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insertion_command_queue_t *insertion_commands;
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} cell_queue_t;
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/** Beginning of a RELAY cell payload. */
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@ -2730,6 +2748,19 @@ typedef struct {
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struct create_cell_t;
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/** Entry in the cell stats list of a circuit; used only when
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* TestingTorNetwork is set. */
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typedef struct testing_cell_stats_entry_t {
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uint8_t command; /**< cell command number. */
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/** Waiting time in centiseconds if this event is for a removed cell,
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* or 0 if this event is for adding a cell to the queue. 22 bits can
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* store more than 11 hours, enough to assume that a circuit with this
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* delay would long have been closed. */
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unsigned int waiting_time:22;
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unsigned int removed:1; /**< 0 for added to, 1 for removed from queue. */
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unsigned int exit_ward:1; /**< 0 for app-ward, 1 for exit-ward. */
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} testing_cell_stats_entry_t;
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/**
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* A circuit is a path over the onion routing
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* network. Applications can connect to one end of the circuit, and can
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@ -2855,6 +2886,11 @@ typedef struct circuit_t {
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* cells to n_conn. NULL if we have no cells pending, or if we're not
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* linked to an OR connection. */
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struct circuit_t *prev_active_on_n_chan;
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/** Various statistics about cells being added to or removed from this
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* circuit's queues; used only when TestingTorNetwork is set and cleared
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* after being sent to control port. */
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smartlist_t *testing_cell_stats;
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} circuit_t;
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/** Largest number of relay_early cells that we can send on a given
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@ -2045,6 +2045,10 @@ static mp_pool_t *cell_pool = NULL;
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* statistics. */
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static mp_pool_t *it_pool = NULL;
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/** Memory pool to allocate insertion_command_elem_t objects used for cell
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* statistics in TestingTorNetwork mode. */
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static mp_pool_t *ic_pool = NULL;
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/** Allocate structures to hold cells. */
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void
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init_cell_pool(void)
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@ -2053,8 +2057,8 @@ init_cell_pool(void)
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cell_pool = mp_pool_new(sizeof(packed_cell_t), 128*1024);
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}
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/** Free all storage used to hold cells (and insertion times if we measure
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* cell statistics). */
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/** Free all storage used to hold cells (and insertion times/commands if we
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* measure cell statistics and/or are in TestingTorNetwork mode). */
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void
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free_cell_pool(void)
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{
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@ -2067,6 +2071,10 @@ free_cell_pool(void)
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mp_pool_destroy(it_pool);
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it_pool = NULL;
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}
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if (ic_pool) {
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mp_pool_destroy(ic_pool);
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ic_pool = NULL;
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}
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}
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/** Free excess storage in cell pool. */
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@ -2145,14 +2153,16 @@ cell_queue_append(cell_queue_t *queue, packed_cell_t *cell)
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++queue->n;
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}
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/** Append a newly allocated copy of <b>cell</b> to the end of <b>queue</b> */
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/** Append a newly allocated copy of <b>cell</b> to the end of the
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* <b>exit_ward</b> (or app-ward) <b>queue</b> of <b>circ</b>. */
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void
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cell_queue_append_packed_copy(cell_queue_t *queue, const cell_t *cell,
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cell_queue_append_packed_copy(circuit_t *circ, cell_queue_t *queue,
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int exit_ward, const cell_t *cell,
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int wide_circ_ids)
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{
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packed_cell_t *copy = packed_cell_copy(cell, wide_circ_ids);
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/* Remember the time when this cell was put in the queue. */
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if (get_options()->CellStatistics) {
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if (get_options()->CellStatistics || get_options()->TestingTorNetwork) {
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struct timeval now;
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uint32_t added;
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insertion_time_queue_t *it_queue = queue->insertion_times;
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@ -2181,6 +2191,38 @@ cell_queue_append_packed_copy(cell_queue_t *queue, const cell_t *cell,
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}
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}
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}
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/* Remember that we added a cell to the queue, and remember the cell
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* command. */
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if (get_options()->TestingTorNetwork) {
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insertion_command_queue_t *ic_queue = queue->insertion_commands;
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testing_cell_stats_entry_t *ent =
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tor_malloc_zero(sizeof(testing_cell_stats_entry_t));
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ent->command = cell->command;
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ent->exit_ward = exit_ward;
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if (!circ->testing_cell_stats)
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circ->testing_cell_stats = smartlist_new();
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smartlist_add(circ->testing_cell_stats, ent);
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if (!ic_pool)
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ic_pool = mp_pool_new(sizeof(insertion_command_elem_t), 1024);
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if (!ic_queue) {
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ic_queue = tor_malloc_zero(sizeof(insertion_command_queue_t));
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queue->insertion_commands = ic_queue;
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}
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if (ic_queue->last && ic_queue->last->command == cell->command) {
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ic_queue->last->counter++;
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} else {
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insertion_command_elem_t *elem = mp_pool_get(ic_pool);
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elem->next = NULL;
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elem->command = cell->command;
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elem->counter = 1;
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if (ic_queue->last) {
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ic_queue->last->next = elem;
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ic_queue->last = elem;
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} else {
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ic_queue->first = ic_queue->last = elem;
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}
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}
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}
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cell_queue_append(queue, copy);
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}
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@ -2386,7 +2428,8 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max)
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cell = cell_queue_pop(queue);
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/* Calculate the exact time that this cell has spent in the queue. */
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if (get_options()->CellStatistics && !CIRCUIT_IS_ORIGIN(circ)) {
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if (get_options()->CellStatistics ||
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get_options()->TestingTorNetwork) {
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struct timeval tvnow;
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uint32_t flushed;
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uint32_t cell_waiting_time;
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@ -2400,7 +2443,6 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max)
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"recently enabled.");
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} else {
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insertion_time_elem_t *elem = it_queue->first;
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or_circ = TO_OR_CIRCUIT(circ);
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cell_waiting_time =
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(uint32_t)((flushed * 10L + SECONDS_IN_A_DAY * 1000L -
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elem->insertion_time * 10L) %
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@ -2413,9 +2455,39 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max)
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it_queue->last = NULL;
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mp_pool_release(elem);
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}
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||||
if (get_options()->CellStatistics && !CIRCUIT_IS_ORIGIN(circ)) {
|
||||
or_circ = TO_OR_CIRCUIT(circ);
|
||||
or_circ->total_cell_waiting_time += cell_waiting_time;
|
||||
or_circ->processed_cells++;
|
||||
}
|
||||
if (get_options()->TestingTorNetwork) {
|
||||
insertion_command_queue_t *ic_queue = queue->insertion_commands;
|
||||
if (!ic_queue || !ic_queue->first) {
|
||||
log_info(LD_BUG, "Cannot determine command of cell, which "
|
||||
"is a bug, because TestingTorNetwork cannot "
|
||||
"be enabled while running.");
|
||||
} else {
|
||||
testing_cell_stats_entry_t *ent =
|
||||
tor_malloc_zero(sizeof(testing_cell_stats_entry_t));
|
||||
insertion_command_elem_t *ic_elem = ic_queue->first;
|
||||
ent->command = ic_elem->command;
|
||||
ic_elem->counter--;
|
||||
if (ic_elem->counter < 1) {
|
||||
ic_queue->first = ic_elem->next;
|
||||
if (ic_elem == ic_queue->last)
|
||||
ic_queue->last = NULL;
|
||||
mp_pool_release(ic_elem);
|
||||
}
|
||||
ent->waiting_time = (unsigned int)cell_waiting_time / 10;
|
||||
ent->removed = 1;
|
||||
if (circ->n_chan == chan)
|
||||
ent->exit_ward = 1;
|
||||
if (!circ->testing_cell_stats)
|
||||
circ->testing_cell_stats = smartlist_new();
|
||||
smartlist_add(circ->testing_cell_stats, ent);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* If we just flushed our queue and this circuit is used for a
|
||||
@ -2470,10 +2542,12 @@ append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
|
||||
{
|
||||
cell_queue_t *queue;
|
||||
int streams_blocked;
|
||||
int exit_ward;
|
||||
if (circ->marked_for_close)
|
||||
return;
|
||||
|
||||
if (direction == CELL_DIRECTION_OUT) {
|
||||
exit_ward = (direction == CELL_DIRECTION_OUT);
|
||||
if (exit_ward) {
|
||||
queue = &circ->n_chan_cells;
|
||||
streams_blocked = circ->streams_blocked_on_n_chan;
|
||||
} else {
|
||||
@ -2482,7 +2556,8 @@ append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
|
||||
streams_blocked = circ->streams_blocked_on_p_chan;
|
||||
}
|
||||
|
||||
cell_queue_append_packed_copy(queue, cell, chan->wide_circ_ids);
|
||||
cell_queue_append_packed_copy(circ, queue, exit_ward, cell,
|
||||
chan->wide_circ_ids);
|
||||
|
||||
/* If we have too many cells on the circuit, we should stop reading from
|
||||
* the edge streams for a while. */
|
||||
|
||||
@ -52,7 +52,8 @@ void packed_cell_free(packed_cell_t *cell);
|
||||
|
||||
void cell_queue_clear(cell_queue_t *queue);
|
||||
void cell_queue_append(cell_queue_t *queue, packed_cell_t *cell);
|
||||
void cell_queue_append_packed_copy(cell_queue_t *queue, const cell_t *cell,
|
||||
void cell_queue_append_packed_copy(circuit_t *circ, cell_queue_t *queue,
|
||||
int exit_ward, const cell_t *cell,
|
||||
int wide_circ_ids);
|
||||
|
||||
void append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user