unbound/daemon/stats.c

   1 /*
   2  * daemon/stats.c - collect runtime performance indicators.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file describes the data structure used to collect runtime performance
  40  * numbers. These 'statistics' may be of interest to the operator.
  41  */
  42 #include "config.h"
  43 #ifdef HAVE_TIME_H
  44 #include <time.h>
  45 #endif
  46 #include <sys/time.h>
  47 #include <sys/types.h>
  48 #include "daemon/stats.h"
  49 #include "daemon/worker.h"
  50 #include "daemon/daemon.h"
  51 #include "services/mesh.h"
  52 #include "services/outside_network.h"
  53 #include "util/config_file.h"
  54 #include "util/tube.h"
  55 #include "util/timehist.h"
  56 #include "util/net_help.h"
  57 #include "validator/validator.h"
  58 #include "ldns/sbuffer.h"
  59 #include "services/cache/rrset.h"
  60 #include "services/cache/infra.h"
  61 #include "validator/val_kcache.h"
  62
  63 /** add timers and the values do not overflow or become negative */
  64 static void
  65 timeval_add(struct timeval* d, const struct timeval* add)
  66 {
  67 #ifndef S_SPLINT_S
  68         d->tv_sec += add->tv_sec;
  69         d->tv_usec += add->tv_usec;
  70         if(d->tv_usec > 1000000) {
  71                 d->tv_usec -= 1000000;
  72                 d->tv_sec++;
  73         }
  74 #endif
  75 }
  76
  77 void server_stats_init(struct server_stats* stats, struct config_file* cfg)
  78 {
  79         memset(stats, 0, sizeof(*stats));
  80         stats->extended = cfg->stat_extended;
  81 }
  82
  83 void server_stats_querymiss(struct server_stats* stats, struct worker* worker)
  84 {
  85         stats->num_queries_missed_cache++;
  86         stats->sum_query_list_size += worker->env.mesh->all.count;
  87         if(worker->env.mesh->all.count > stats->max_query_list_size)
  88                 stats->max_query_list_size = worker->env.mesh->all.count;
  89 }
  90
  91 void server_stats_prefetch(struct server_stats* stats, struct worker* worker)
  92 {
  93         stats->num_queries_prefetch++;
  94         /* changes the query list size so account that, like a querymiss */
  95         stats->sum_query_list_size += worker->env.mesh->all.count;
  96         if(worker->env.mesh->all.count > stats->max_query_list_size)
  97                 stats->max_query_list_size = worker->env.mesh->all.count;
  98 }
  99
 100 void server_stats_log(struct server_stats* stats, struct worker* worker,
 101         int threadnum)
 102 {
 103         log_info("server stats for thread %d: %u queries, "
 104                 "%u answers from cache, %u recursions, %u prefetch",
 105                 threadnum, (unsigned)stats->num_queries,
 106                 (unsigned)(stats->num_queries -
 107                         stats->num_queries_missed_cache),
 108                 (unsigned)stats->num_queries_missed_cache,
 109                 (unsigned)stats->num_queries_prefetch);
 110         log_info("server stats for thread %d: requestlist max %u avg %g "
 111                 "exceeded %u jostled %u", threadnum,
 112                 (unsigned)stats->max_query_list_size,
 113                 (stats->num_queries_missed_cache+stats->num_queries_prefetch)?
 114                         (double)stats->sum_query_list_size/
 115                         (stats->num_queries_missed_cache+
 116                         stats->num_queries_prefetch) : 0.0,
 117                 (unsigned)worker->env.mesh->stats_dropped,
 118                 (unsigned)worker->env.mesh->stats_jostled);
 119 }
 120
 121 /** get rrsets bogus number from validator */
 122 static size_t
 123 get_rrset_bogus(struct worker* worker)
 124 {
 125         int m = modstack_find(&worker->env.mesh->mods, "validator");
 126         struct val_env* ve;
 127         size_t r;
 128         if(m == -1)
 129                 return 0;
 130         ve = (struct val_env*)worker->env.modinfo[m];
 131         lock_basic_lock(&ve->bogus_lock);
 132         r = ve->num_rrset_bogus;
 133         if(!worker->env.cfg->stat_cumulative)
 134                 ve->num_rrset_bogus = 0;
 135         lock_basic_unlock(&ve->bogus_lock);
 136         return r;
 137 }
 138
 139 void
 140 server_stats_compile(struct worker* worker, struct stats_info* s, int reset)
 141 {
 142         int i;
 143
 144         s->svr = worker->stats;
 145         s->mesh_num_states = worker->env.mesh->all.count;
 146         s->mesh_num_reply_states = worker->env.mesh->num_reply_states;
 147         s->mesh_jostled = worker->env.mesh->stats_jostled;
 148         s->mesh_dropped = worker->env.mesh->stats_dropped;
 149         s->mesh_replies_sent = worker->env.mesh->replies_sent;
 150         s->mesh_replies_sum_wait = worker->env.mesh->replies_sum_wait;
 151         s->mesh_time_median = timehist_quartile(worker->env.mesh->histogram,
 152                 0.50);
 153
 154         /* add in the values from the mesh */
 155         s->svr.ans_secure += worker->env.mesh->ans_secure;
 156         s->svr.ans_bogus += worker->env.mesh->ans_bogus;
 157         s->svr.ans_rcode_nodata += worker->env.mesh->ans_nodata;
 158         for(i=0; i<16; i++)
 159                 s->svr.ans_rcode[i] += worker->env.mesh->ans_rcode[i];
 160         timehist_export(worker->env.mesh->histogram, s->svr.hist,
 161                 NUM_BUCKETS_HIST);
 162         /* values from outside network */
 163         s->svr.unwanted_replies = worker->back->unwanted_replies;
 164         s->svr.qtcp_outgoing = worker->back->num_tcp_outgoing;
 165
 166         /* get and reset validator rrset bogus number */
 167         s->svr.rrset_bogus = get_rrset_bogus(worker);
 168
 169         /* get cache sizes */
 170         s->svr.msg_cache_count = count_slabhash_entries(worker->env.msg_cache);
 171         s->svr.rrset_cache_count = count_slabhash_entries(&worker->env.rrset_cache->table);
 172         s->svr.infra_cache_count = count_slabhash_entries(worker->env.infra_cache->hosts);
 173         if(worker->env.key_cache)
 174                 s->svr.key_cache_count = count_slabhash_entries(worker->env.key_cache->slab);
 175         else    s->svr.key_cache_count = 0;
 176
 177         if(reset && !worker->env.cfg->stat_cumulative) {
 178                 worker_stats_clear(worker);
 179         }
 180 }
 181
 182 void server_stats_obtain(struct worker* worker, struct worker* who,
 183         struct stats_info* s, int reset)
 184 {
 185         uint8_t *reply = NULL;
 186         uint32_t len = 0;
 187         if(worker == who) {
 188                 /* just fill it in */
 189                 server_stats_compile(worker, s, reset);
 190                 return;
 191         }
 192         /* communicate over tube */
 193         verbose(VERB_ALGO, "write stats cmd");
 194         if(reset)
 195                 worker_send_cmd(who, worker_cmd_stats);
 196         else    worker_send_cmd(who, worker_cmd_stats_noreset);
 197         verbose(VERB_ALGO, "wait for stats reply");
 198         if(!tube_read_msg(worker->cmd, &reply, &len, 0))
 199                 fatal_exit("failed to read stats over cmd channel");
 200         if(len != (uint32_t)sizeof(*s))
 201                 fatal_exit("stats on cmd channel wrong length %d %d",
 202                         (int)len, (int)sizeof(*s));
 203         memcpy(s, reply, (size_t)len);
 204         free(reply);
 205 }
 206
 207 void server_stats_reply(struct worker* worker, int reset)
 208 {
 209         struct stats_info s;
 210         server_stats_compile(worker, &s, reset);
 211         verbose(VERB_ALGO, "write stats replymsg");
 212         if(!tube_write_msg(worker->daemon->workers[0]->cmd,
 213                 (uint8_t*)&s, sizeof(s), 0))
 214                 fatal_exit("could not write stat values over cmd channel");
 215 }
 216
 217 void server_stats_add(struct stats_info* total, struct stats_info* a)
 218 {
 219         total->svr.num_queries += a->svr.num_queries;
 220         total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
 221         total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
 222         total->svr.sum_query_list_size += a->svr.sum_query_list_size;
 223         /* the max size reached is upped to higher of both */
 224         if(a->svr.max_query_list_size > total->svr.max_query_list_size)
 225                 total->svr.max_query_list_size = a->svr.max_query_list_size;
 226
 227         if(a->svr.extended) {
 228                 int i;
 229                 total->svr.qtype_big += a->svr.qtype_big;
 230                 total->svr.qclass_big += a->svr.qclass_big;
 231                 total->svr.qtcp += a->svr.qtcp;
 232                 total->svr.qtcp_outgoing += a->svr.qtcp_outgoing;
 233                 total->svr.qipv6 += a->svr.qipv6;
 234                 total->svr.qbit_QR += a->svr.qbit_QR;
 235                 total->svr.qbit_AA += a->svr.qbit_AA;
 236                 total->svr.qbit_TC += a->svr.qbit_TC;
 237                 total->svr.qbit_RD += a->svr.qbit_RD;
 238                 total->svr.qbit_RA += a->svr.qbit_RA;
 239                 total->svr.qbit_Z += a->svr.qbit_Z;
 240                 total->svr.qbit_AD += a->svr.qbit_AD;
 241                 total->svr.qbit_CD += a->svr.qbit_CD;
 242                 total->svr.qEDNS += a->svr.qEDNS;
 243                 total->svr.qEDNS_DO += a->svr.qEDNS_DO;
 244                 total->svr.ans_rcode_nodata += a->svr.ans_rcode_nodata;
 245                 total->svr.ans_secure += a->svr.ans_secure;
 246                 total->svr.ans_bogus += a->svr.ans_bogus;
 247                 total->svr.rrset_bogus += a->svr.rrset_bogus;
 248                 total->svr.unwanted_replies += a->svr.unwanted_replies;
 249                 total->svr.unwanted_queries += a->svr.unwanted_queries;
 250                 for(i=0; i<STATS_QTYPE_NUM; i++)
 251                         total->svr.qtype[i] += a->svr.qtype[i];
 252                 for(i=0; i<STATS_QCLASS_NUM; i++)
 253                         total->svr.qclass[i] += a->svr.qclass[i];
 254                 for(i=0; i<STATS_OPCODE_NUM; i++)
 255                         total->svr.qopcode[i] += a->svr.qopcode[i];
 256                 for(i=0; i<STATS_RCODE_NUM; i++)
 257                         total->svr.ans_rcode[i] += a->svr.ans_rcode[i];
 258                 for(i=0; i<NUM_BUCKETS_HIST; i++)
 259                         total->svr.hist[i] += a->svr.hist[i];
 260         }
 261
 262         total->mesh_num_states += a->mesh_num_states;
 263         total->mesh_num_reply_states += a->mesh_num_reply_states;
 264         total->mesh_jostled += a->mesh_jostled;
 265         total->mesh_dropped += a->mesh_dropped;
 266         total->mesh_replies_sent += a->mesh_replies_sent;
 267         timeval_add(&total->mesh_replies_sum_wait, &a->mesh_replies_sum_wait);
 268         /* the medians are averaged together, this is not as accurate as
 269          * taking the median over all of the data, but is good and fast
 270          * added up here, division later*/
 271         total->mesh_time_median += a->mesh_time_median;
 272 }
 273
 274 void server_stats_insquery(struct server_stats* stats, struct comm_point* c,
 275         uint16_t qtype, uint16_t qclass, struct edns_data* edns,
 276         struct comm_reply* repinfo)
 277 {
 278         uint16_t flags = sldns_buffer_read_u16_at(c->buffer, 2);
 279         if(qtype < STATS_QTYPE_NUM)
 280                 stats->qtype[qtype]++;
 281         else    stats->qtype_big++;
 282         if(qclass < STATS_QCLASS_NUM)
 283                 stats->qclass[qclass]++;
 284         else    stats->qclass_big++;
 285         stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
 286         if(c->type != comm_udp)
 287                 stats->qtcp++;
 288         if(repinfo && addr_is_ip6(&repinfo->addr, repinfo->addrlen))
 289                 stats->qipv6++;
 290         if( (flags&BIT_QR) )
 291                 stats->qbit_QR++;
 292         if( (flags&BIT_AA) )
 293                 stats->qbit_AA++;
 294         if( (flags&BIT_TC) )
 295                 stats->qbit_TC++;
 296         if( (flags&BIT_RD) )
 297                 stats->qbit_RD++;
 298         if( (flags&BIT_RA) )
 299                 stats->qbit_RA++;
 300         if( (flags&BIT_Z) )
 301                 stats->qbit_Z++;
 302         if( (flags&BIT_AD) )
 303                 stats->qbit_AD++;
 304         if( (flags&BIT_CD) )
 305                 stats->qbit_CD++;
 306         if(edns->edns_present) {
 307                 stats->qEDNS++;
 308                 if( (edns->bits & EDNS_DO) )
 309                         stats->qEDNS_DO++;
 310         }
 311 }
 312
 313 void server_stats_insrcode(struct server_stats* stats, sldns_buffer* buf)
 314 {
 315         if(stats->extended && sldns_buffer_limit(buf) != 0) {
 316                 int r = (int)LDNS_RCODE_WIRE( sldns_buffer_begin(buf) );
 317                 stats->ans_rcode[r] ++;
 318                 if(r == 0 && LDNS_ANCOUNT( sldns_buffer_begin(buf) ) == 0)
 319                         stats->ans_rcode_nodata ++;
 320         }
 321 }