332 lines
11 KiB
C
332 lines
11 KiB
C
/*
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* daemon/stats.c - collect runtime performance indicators.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file describes the data structure used to collect runtime performance
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* numbers. These 'statistics' may be of interest to the operator.
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*/
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#include "config.h"
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#include <sys/time.h>
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#include <sys/types.h>
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#include "daemon/stats.h"
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#include "daemon/worker.h"
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#include "daemon/daemon.h"
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#include "services/mesh.h"
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#include "services/outside_network.h"
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#include "services/listen_dnsport.h"
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#include "util/config_file.h"
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#include "util/tube.h"
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#include "util/timehist.h"
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#include "util/net_help.h"
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#include "validator/validator.h"
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#include "sldns/sbuffer.h"
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#include "services/cache/rrset.h"
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#include "services/cache/infra.h"
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#include "validator/val_kcache.h"
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/** add timers and the values do not overflow or become negative */
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static void
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timeval_add(struct timeval* d, const struct timeval* add)
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{
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#ifndef S_SPLINT_S
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d->tv_sec += add->tv_sec;
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d->tv_usec += add->tv_usec;
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if(d->tv_usec > 1000000) {
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d->tv_usec -= 1000000;
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d->tv_sec++;
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}
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#endif
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}
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void server_stats_init(struct server_stats* stats, struct config_file* cfg)
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{
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memset(stats, 0, sizeof(*stats));
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stats->extended = cfg->stat_extended;
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}
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void server_stats_querymiss(struct server_stats* stats, struct worker* worker)
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{
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stats->num_queries_missed_cache++;
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stats->sum_query_list_size += worker->env.mesh->all.count;
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if(worker->env.mesh->all.count > stats->max_query_list_size)
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stats->max_query_list_size = worker->env.mesh->all.count;
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}
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void server_stats_prefetch(struct server_stats* stats, struct worker* worker)
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{
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stats->num_queries_prefetch++;
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/* changes the query list size so account that, like a querymiss */
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stats->sum_query_list_size += worker->env.mesh->all.count;
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if(worker->env.mesh->all.count > stats->max_query_list_size)
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stats->max_query_list_size = worker->env.mesh->all.count;
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}
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void server_stats_log(struct server_stats* stats, struct worker* worker,
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int threadnum)
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{
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log_info("server stats for thread %d: %u queries, "
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"%u answers from cache, %u recursions, %u prefetch",
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threadnum, (unsigned)stats->num_queries,
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(unsigned)(stats->num_queries -
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stats->num_queries_missed_cache),
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(unsigned)stats->num_queries_missed_cache,
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(unsigned)stats->num_queries_prefetch);
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log_info("server stats for thread %d: requestlist max %u avg %g "
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"exceeded %u jostled %u", threadnum,
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(unsigned)stats->max_query_list_size,
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(stats->num_queries_missed_cache+stats->num_queries_prefetch)?
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(double)stats->sum_query_list_size/
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(stats->num_queries_missed_cache+
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stats->num_queries_prefetch) : 0.0,
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(unsigned)worker->env.mesh->stats_dropped,
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(unsigned)worker->env.mesh->stats_jostled);
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}
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/** get rrsets bogus number from validator */
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static size_t
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get_rrset_bogus(struct worker* worker)
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{
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int m = modstack_find(&worker->env.mesh->mods, "validator");
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struct val_env* ve;
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size_t r;
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if(m == -1)
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return 0;
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ve = (struct val_env*)worker->env.modinfo[m];
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lock_basic_lock(&ve->bogus_lock);
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r = ve->num_rrset_bogus;
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if(!worker->env.cfg->stat_cumulative)
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ve->num_rrset_bogus = 0;
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lock_basic_unlock(&ve->bogus_lock);
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return r;
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}
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void
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server_stats_compile(struct worker* worker, struct stats_info* s, int reset)
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{
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int i;
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struct listen_list* lp;
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s->svr = worker->stats;
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s->mesh_num_states = worker->env.mesh->all.count;
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s->mesh_num_reply_states = worker->env.mesh->num_reply_states;
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s->mesh_jostled = worker->env.mesh->stats_jostled;
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s->mesh_dropped = worker->env.mesh->stats_dropped;
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s->mesh_replies_sent = worker->env.mesh->replies_sent;
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s->mesh_replies_sum_wait = worker->env.mesh->replies_sum_wait;
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s->mesh_time_median = timehist_quartile(worker->env.mesh->histogram,
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0.50);
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/* add in the values from the mesh */
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s->svr.ans_secure += worker->env.mesh->ans_secure;
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s->svr.ans_bogus += worker->env.mesh->ans_bogus;
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s->svr.ans_rcode_nodata += worker->env.mesh->ans_nodata;
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for(i=0; i<16; i++)
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s->svr.ans_rcode[i] += worker->env.mesh->ans_rcode[i];
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timehist_export(worker->env.mesh->histogram, s->svr.hist,
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NUM_BUCKETS_HIST);
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/* values from outside network */
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s->svr.unwanted_replies = worker->back->unwanted_replies;
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s->svr.qtcp_outgoing = worker->back->num_tcp_outgoing;
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/* get and reset validator rrset bogus number */
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s->svr.rrset_bogus = get_rrset_bogus(worker);
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/* get cache sizes */
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s->svr.msg_cache_count = count_slabhash_entries(worker->env.msg_cache);
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s->svr.rrset_cache_count = count_slabhash_entries(&worker->env.rrset_cache->table);
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s->svr.infra_cache_count = count_slabhash_entries(worker->env.infra_cache->hosts);
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if(worker->env.key_cache)
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s->svr.key_cache_count = count_slabhash_entries(worker->env.key_cache->slab);
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else s->svr.key_cache_count = 0;
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/* get tcp accept usage */
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s->svr.tcp_accept_usage = 0;
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for(lp = worker->front->cps; lp; lp = lp->next) {
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if(lp->com->type == comm_tcp_accept)
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s->svr.tcp_accept_usage += lp->com->cur_tcp_count;
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}
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if(reset && !worker->env.cfg->stat_cumulative) {
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worker_stats_clear(worker);
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}
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}
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void server_stats_obtain(struct worker* worker, struct worker* who,
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struct stats_info* s, int reset)
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{
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uint8_t *reply = NULL;
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uint32_t len = 0;
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if(worker == who) {
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/* just fill it in */
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server_stats_compile(worker, s, reset);
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return;
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}
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/* communicate over tube */
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verbose(VERB_ALGO, "write stats cmd");
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if(reset)
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worker_send_cmd(who, worker_cmd_stats);
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else worker_send_cmd(who, worker_cmd_stats_noreset);
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verbose(VERB_ALGO, "wait for stats reply");
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if(!tube_read_msg(worker->cmd, &reply, &len, 0))
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fatal_exit("failed to read stats over cmd channel");
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if(len != (uint32_t)sizeof(*s))
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fatal_exit("stats on cmd channel wrong length %d %d",
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(int)len, (int)sizeof(*s));
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memcpy(s, reply, (size_t)len);
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free(reply);
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}
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void server_stats_reply(struct worker* worker, int reset)
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{
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struct stats_info s;
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server_stats_compile(worker, &s, reset);
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verbose(VERB_ALGO, "write stats replymsg");
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if(!tube_write_msg(worker->daemon->workers[0]->cmd,
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(uint8_t*)&s, sizeof(s), 0))
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fatal_exit("could not write stat values over cmd channel");
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}
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void server_stats_add(struct stats_info* total, struct stats_info* a)
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{
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total->svr.num_queries += a->svr.num_queries;
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total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
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total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
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total->svr.sum_query_list_size += a->svr.sum_query_list_size;
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/* the max size reached is upped to higher of both */
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if(a->svr.max_query_list_size > total->svr.max_query_list_size)
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total->svr.max_query_list_size = a->svr.max_query_list_size;
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if(a->svr.extended) {
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int i;
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total->svr.qtype_big += a->svr.qtype_big;
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total->svr.qclass_big += a->svr.qclass_big;
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total->svr.qtcp += a->svr.qtcp;
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total->svr.qtcp_outgoing += a->svr.qtcp_outgoing;
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total->svr.qipv6 += a->svr.qipv6;
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total->svr.qbit_QR += a->svr.qbit_QR;
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total->svr.qbit_AA += a->svr.qbit_AA;
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total->svr.qbit_TC += a->svr.qbit_TC;
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total->svr.qbit_RD += a->svr.qbit_RD;
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total->svr.qbit_RA += a->svr.qbit_RA;
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total->svr.qbit_Z += a->svr.qbit_Z;
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total->svr.qbit_AD += a->svr.qbit_AD;
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total->svr.qbit_CD += a->svr.qbit_CD;
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total->svr.qEDNS += a->svr.qEDNS;
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total->svr.qEDNS_DO += a->svr.qEDNS_DO;
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total->svr.ans_rcode_nodata += a->svr.ans_rcode_nodata;
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total->svr.ans_secure += a->svr.ans_secure;
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total->svr.ans_bogus += a->svr.ans_bogus;
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total->svr.rrset_bogus += a->svr.rrset_bogus;
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total->svr.unwanted_replies += a->svr.unwanted_replies;
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total->svr.unwanted_queries += a->svr.unwanted_queries;
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total->svr.tcp_accept_usage += a->svr.tcp_accept_usage;
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for(i=0; i<STATS_QTYPE_NUM; i++)
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total->svr.qtype[i] += a->svr.qtype[i];
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for(i=0; i<STATS_QCLASS_NUM; i++)
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total->svr.qclass[i] += a->svr.qclass[i];
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for(i=0; i<STATS_OPCODE_NUM; i++)
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total->svr.qopcode[i] += a->svr.qopcode[i];
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for(i=0; i<STATS_RCODE_NUM; i++)
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total->svr.ans_rcode[i] += a->svr.ans_rcode[i];
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for(i=0; i<NUM_BUCKETS_HIST; i++)
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total->svr.hist[i] += a->svr.hist[i];
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}
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total->mesh_num_states += a->mesh_num_states;
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total->mesh_num_reply_states += a->mesh_num_reply_states;
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total->mesh_jostled += a->mesh_jostled;
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total->mesh_dropped += a->mesh_dropped;
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total->mesh_replies_sent += a->mesh_replies_sent;
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timeval_add(&total->mesh_replies_sum_wait, &a->mesh_replies_sum_wait);
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/* the medians are averaged together, this is not as accurate as
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* taking the median over all of the data, but is good and fast
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* added up here, division later*/
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total->mesh_time_median += a->mesh_time_median;
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}
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void server_stats_insquery(struct server_stats* stats, struct comm_point* c,
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uint16_t qtype, uint16_t qclass, struct edns_data* edns,
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struct comm_reply* repinfo)
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{
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uint16_t flags = sldns_buffer_read_u16_at(c->buffer, 2);
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if(qtype < STATS_QTYPE_NUM)
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stats->qtype[qtype]++;
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else stats->qtype_big++;
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if(qclass < STATS_QCLASS_NUM)
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stats->qclass[qclass]++;
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else stats->qclass_big++;
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stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
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if(c->type != comm_udp)
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stats->qtcp++;
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if(repinfo && addr_is_ip6(&repinfo->addr, repinfo->addrlen))
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stats->qipv6++;
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if( (flags&BIT_QR) )
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stats->qbit_QR++;
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if( (flags&BIT_AA) )
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stats->qbit_AA++;
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if( (flags&BIT_TC) )
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stats->qbit_TC++;
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if( (flags&BIT_RD) )
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stats->qbit_RD++;
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if( (flags&BIT_RA) )
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stats->qbit_RA++;
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if( (flags&BIT_Z) )
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stats->qbit_Z++;
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if( (flags&BIT_AD) )
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stats->qbit_AD++;
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if( (flags&BIT_CD) )
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stats->qbit_CD++;
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if(edns->edns_present) {
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stats->qEDNS++;
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if( (edns->bits & EDNS_DO) )
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stats->qEDNS_DO++;
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}
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}
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void server_stats_insrcode(struct server_stats* stats, sldns_buffer* buf)
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{
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if(stats->extended && sldns_buffer_limit(buf) != 0) {
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int r = (int)LDNS_RCODE_WIRE( sldns_buffer_begin(buf) );
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stats->ans_rcode[r] ++;
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if(r == 0 && LDNS_ANCOUNT( sldns_buffer_begin(buf) ) == 0)
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stats->ans_rcode_nodata ++;
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}
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}
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