src/redis-benchmark.c

   1 /* Redis benchmark utility.
   2  *
   3  * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   * Redistributions of source code must retain the above copyright notice,
  10  *     this list of conditions and the following disclaimer.
  11  *   * Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *   * Neither the name of Redis nor the names of its contributors may be used
  15  *     to endorse or promote products derived from this software without
  16  *     specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "fmacros.h"
  32
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <errno.h>
  38 #include <sys/time.h>
  39 #include <signal.h>
  40 #include <assert.h>
  41
  42 #include "ae.h"
  43 #include "anet.h"
  44 #include "sds.h"
  45 #include "adlist.h"
  46 #include "zmalloc.h"
  47
  48 #define REPLY_INT 0
  49 #define REPLY_RETCODE 1
  50 #define REPLY_BULK 2
  51 #define REPLY_MBULK 3
  52
  53 #define CLIENT_CONNECTING 0
  54 #define CLIENT_SENDQUERY 1
  55 #define CLIENT_READREPLY 2
  56
  57 #define MAX_LATENCY 5000
  58
  59 #define REDIS_NOTUSED(V) ((void) V)
  60
  61 static struct config {
  62     int debug;
  63     int numclients;
  64     int requests;
  65     int liveclients;
  66     int donerequests;
  67     int keysize;
  68     int datasize;
  69     int randomkeys;
  70     int randomkeys_keyspacelen;
  71     aeEventLoop *el;
  72     char *hostip;
  73     int hostport;
  74     int keepalive;
  75     long long start;
  76     long long totlatency;
  77     int *latency;
  78     char *title;
  79     list *clients;
  80     int quiet;
  81     int loop;
  82     int idlemode;
  83 } config;
  84
  85 typedef struct _client {
  86     int state;
  87     int fd;
  88     sds obuf;
  89     sds ibuf;
  90     int mbulk;          /* Number of elements in an mbulk reply */
  91     int readlen;        /* readlen == -1 means read a single line */
  92     int totreceived;
  93     unsigned int written;        /* bytes of 'obuf' already written */
  94     int replytype;
  95     long long start;    /* start time in milliseconds */
  96 } *client;
  97
  98 /* Prototypes */
  99 static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 100 static void createMissingClients(client c);
 101
 102 /* Implementation */
 103 static long long mstime(void) {
 104     struct timeval tv;
 105     long long mst;
 106
 107     gettimeofday(&tv, NULL);
 108     mst = ((long)tv.tv_sec)*1000;
 109     mst += tv.tv_usec/1000;
 110     return mst;
 111 }
 112
 113 static void freeClient(client c) {
 114     listNode *ln;
 115
 116     aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 117     aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
 118     sdsfree(c->ibuf);
 119     sdsfree(c->obuf);
 120     close(c->fd);
 121     zfree(c);
 122     config.liveclients--;
 123     ln = listSearchKey(config.clients,c);
 124     assert(ln != NULL);
 125     listDelNode(config.clients,ln);
 126 }
 127
 128 static void freeAllClients(void) {
 129     listNode *ln = config.clients->head, *next;
 130
 131     while(ln) {
 132         next = ln->next;
 133         freeClient(ln->value);
 134         ln = next;
 135     }
 136 }
 137
 138 static void resetClient(client c) {
 139     aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 140     aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
 141     aeCreateFileEvent(config.el,c->fd, AE_WRITABLE,writeHandler,c);
 142     sdsfree(c->ibuf);
 143     c->ibuf = sdsempty();
 144     c->readlen = (c->replytype == REPLY_BULK ||
 145                   c->replytype == REPLY_MBULK) ? -1 : 0;
 146     c->mbulk = -1;
 147     c->written = 0;
 148     c->totreceived = 0;
 149     c->state = CLIENT_SENDQUERY;
 150     c->start = mstime();
 151     createMissingClients(c);
 152 }
 153
 154 static void randomizeClientKey(client c) {
 155     char *p;
 156     char buf[32];
 157     long r;
 158
 159     p = strstr(c->obuf, "_rand");
 160     if (!p) return;
 161     p += 5;
 162     r = random() % config.randomkeys_keyspacelen;
 163     sprintf(buf,"%ld",r);
 164     memcpy(p,buf,strlen(buf));
 165 }
 166
 167 static void prepareClientForReply(client c, int type) {
 168     if (type == REPLY_BULK) {
 169         c->replytype = REPLY_BULK;
 170         c->readlen = -1;
 171     } else if (type == REPLY_MBULK) {
 172         c->replytype = REPLY_MBULK;
 173         c->readlen = -1;
 174         c->mbulk = -1;
 175     } else {
 176         c->replytype = type;
 177         c->readlen = 0;
 178     }
 179 }
 180
 181 static void clientDone(client c) {
 182     static int last_tot_received = 1;
 183
 184     long long latency;
 185     config.donerequests ++;
 186     latency = mstime() - c->start;
 187     if (latency > MAX_LATENCY) latency = MAX_LATENCY;
 188     config.latency[latency]++;
 189
 190     if (config.debug && last_tot_received != c->totreceived) {
 191         printf("Tot bytes received: %d\n", c->totreceived);
 192         last_tot_received = c->totreceived;
 193     }
 194     if (config.donerequests == config.requests) {
 195         freeClient(c);
 196         aeStop(config.el);
 197         return;
 198     }
 199     if (config.keepalive) {
 200         resetClient(c);
 201         if (config.randomkeys) randomizeClientKey(c);
 202     } else {
 203         config.liveclients--;
 204         createMissingClients(c);
 205         config.liveclients++;
 206         freeClient(c);
 207     }
 208 }
 209
 210 /* Read a length from the buffer pointed to by *p, store the length in *len,
 211  * and return the number of bytes that the cursor advanced. */
 212 static int readLen(char *p, int *len) {
 213     char *tail = strstr(p,"\r\n");
 214     if (tail == NULL)
 215         return 0;
 216     *tail = '\0';
 217     *len = atoi(p+1);
 218     return tail+2-p;
 219 }
 220
 221 static void readHandler(aeEventLoop *el, int fd, void *privdata, int mask)
 222 {
 223     char buf[1024], *p;
 224     int nread, pos=0, len=0;
 225     client c = privdata;
 226     REDIS_NOTUSED(el);
 227     REDIS_NOTUSED(fd);
 228     REDIS_NOTUSED(mask);
 229
 230     nread = read(c->fd,buf,sizeof(buf));
 231     if (nread == -1) {
 232         fprintf(stderr, "Reading from socket: %s\n", strerror(errno));
 233         freeClient(c);
 234         return;
 235     }
 236     if (nread == 0) {
 237         fprintf(stderr, "EOF from client\n");
 238         freeClient(c);
 239         return;
 240     }
 241     c->totreceived += nread;
 242     c->ibuf = sdscatlen(c->ibuf,buf,nread);
 243     len = sdslen(c->ibuf);
 244
 245     if (c->replytype == REPLY_INT ||
 246         c->replytype == REPLY_RETCODE)
 247     {
 248         /* Check if the first line is complete. This is everything we need
 249          * when waiting for an integer or status code reply.*/
 250         if ((p = strstr(c->ibuf,"\r\n")) != NULL)
 251             goto done;
 252     } else if (c->replytype == REPLY_BULK) {
 253         int advance = 0;
 254         if (c->readlen < 0) {
 255             advance = readLen(c->ibuf+pos,&c->readlen);
 256             if (advance) {
 257                 pos += advance;
 258                 if (c->readlen == -1) {
 259                     goto done;
 260                 } else {
 261                     /* include the trailing \r\n */
 262                     c->readlen += 2;
 263                 }
 264             } else {
 265                 goto skip;
 266             }
 267         }
 268
 269         int canconsume;
 270         if (c->readlen > 0) {
 271             canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
 272             c->readlen -= canconsume;
 273             pos += canconsume;
 274         }
 275
 276         if (c->readlen == 0)
 277             goto done;
 278     } else if (c->replytype == REPLY_MBULK) {
 279         int advance = 0;
 280         if (c->mbulk == -1) {
 281             advance = readLen(c->ibuf+pos,&c->mbulk);
 282             if (advance) {
 283                 pos += advance;
 284                 if (c->mbulk == -1)
 285                     goto done;
 286             } else {
 287                 goto skip;
 288             }
 289         }
 290
 291         int canconsume;
 292         while(c->mbulk > 0 && pos < len) {
 293             if (c->readlen > 0) {
 294                 canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
 295                 c->readlen -= canconsume;
 296                 pos += canconsume;
 297                 if (c->readlen == 0)
 298                     c->mbulk--;
 299             } else {
 300                 advance = readLen(c->ibuf+pos,&c->readlen);
 301                 if (advance) {
 302                     pos += advance;
 303                     if (c->readlen == -1) {
 304                         c->mbulk--;
 305                         continue;
 306                     } else {
 307                         /* include the trailing \r\n */
 308                         c->readlen += 2;
 309                     }
 310                 } else {
 311                     goto skip;
 312                 }
 313             }
 314         }
 315
 316         if (c->mbulk == 0)
 317             goto done;
 318     }
 319
 320 skip:
 321     c->ibuf = sdsrange(c->ibuf,pos,-1);
 322     return;
 323 done:
 324     clientDone(c);
 325     return;
 326 }
 327
 328 static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask)
 329 {
 330     client c = privdata;
 331     REDIS_NOTUSED(el);
 332     REDIS_NOTUSED(fd);
 333     REDIS_NOTUSED(mask);
 334
 335     if (c->state == CLIENT_CONNECTING) {
 336         c->state = CLIENT_SENDQUERY;
 337         c->start = mstime();
 338     }
 339     if (sdslen(c->obuf) > c->written) {
 340         void *ptr = c->obuf+c->written;
 341         int len = sdslen(c->obuf) - c->written;
 342         int nwritten = write(c->fd, ptr, len);
 343         if (nwritten == -1) {
 344             if (errno != EPIPE)
 345                 fprintf(stderr, "Writing to socket: %s\n", strerror(errno));
 346             freeClient(c);
 347             return;
 348         }
 349         c->written += nwritten;
 350         if (sdslen(c->obuf) == c->written) {
 351             aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 352             aeCreateFileEvent(config.el,c->fd,AE_READABLE,readHandler,c);
 353             c->state = CLIENT_READREPLY;
 354         }
 355     }
 356 }
 357
 358 static client createClient(void) {
 359     client c = zmalloc(sizeof(struct _client));
 360     char err[ANET_ERR_LEN];
 361
 362     c->fd = anetTcpNonBlockConnect(err,config.hostip,config.hostport);
 363     if (c->fd == ANET_ERR) {
 364         zfree(c);
 365         fprintf(stderr,"Connect: %s\n",err);
 366         return NULL;
 367     }
 368     anetTcpNoDelay(NULL,c->fd);
 369     c->obuf = sdsempty();
 370     c->ibuf = sdsempty();
 371     c->mbulk = -1;
 372     c->readlen = 0;
 373     c->written = 0;
 374     c->totreceived = 0;
 375     c->state = CLIENT_CONNECTING;
 376     aeCreateFileEvent(config.el, c->fd, AE_WRITABLE, writeHandler, c);
 377     config.liveclients++;
 378     listAddNodeTail(config.clients,c);
 379     return c;
 380 }
 381
 382 static void createMissingClients(client c) {
 383     while(config.liveclients < config.numclients) {
 384         client new = createClient();
 385         if (!new) continue;
 386         sdsfree(new->obuf);
 387         new->obuf = sdsdup(c->obuf);
 388         if (config.randomkeys) randomizeClientKey(c);
 389         prepareClientForReply(new,c->replytype);
 390     }
 391 }
 392
 393 static void showLatencyReport(void) {
 394     int j, seen = 0;
 395     float perc, reqpersec;
 396
 397     reqpersec = (float)config.donerequests/((float)config.totlatency/1000);
 398     if (!config.quiet) {
 399         printf("====== %s ======\n", config.title);
 400         printf("  %d requests completed in %.2f seconds\n", config.donerequests,
 401             (float)config.totlatency/1000);
 402         printf("  %d parallel clients\n", config.numclients);
 403         printf("  %d bytes payload\n", config.datasize);
 404         printf("  keep alive: %d\n", config.keepalive);
 405         printf("\n");
 406         for (j = 0; j <= MAX_LATENCY; j++) {
 407             if (config.latency[j]) {
 408                 seen += config.latency[j];
 409                 perc = ((float)seen*100)/config.donerequests;
 410                 printf("%.2f%% <= %d milliseconds\n", perc, j);
 411             }
 412         }
 413         printf("%.2f requests per second\n\n", reqpersec);
 414     } else {
 415         printf("%s: %.2f requests per second\n", config.title, reqpersec);
 416     }
 417 }
 418
 419 static void prepareForBenchmark(char *title) {
 420     memset(config.latency,0,sizeof(int)*(MAX_LATENCY+1));
 421     config.title = title;
 422     config.start = mstime();
 423     config.donerequests = 0;
 424 }
 425
 426 static void endBenchmark(void) {
 427     config.totlatency = mstime()-config.start;
 428     showLatencyReport();
 429     freeAllClients();
 430 }
 431
 432 void parseOptions(int argc, char **argv) {
 433     int i;
 434
 435     for (i = 1; i < argc; i++) {
 436         int lastarg = i==argc-1;
 437
 438         if (!strcmp(argv[i],"-c") && !lastarg) {
 439             config.numclients = atoi(argv[i+1]);
 440             i++;
 441         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 442             config.requests = atoi(argv[i+1]);
 443             i++;
 444         } else if (!strcmp(argv[i],"-k") && !lastarg) {
 445             config.keepalive = atoi(argv[i+1]);
 446             i++;
 447         } else if (!strcmp(argv[i],"-h") && !lastarg) {
 448             char *ip = zmalloc(32);
 449             if (anetResolve(NULL,argv[i+1],ip) == ANET_ERR) {
 450                 printf("Can't resolve %s\n", argv[i]);
 451                 exit(1);
 452             }
 453             config.hostip = ip;
 454             i++;
 455         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 456             config.hostport = atoi(argv[i+1]);
 457             i++;
 458         } else if (!strcmp(argv[i],"-d") && !lastarg) {
 459             config.datasize = atoi(argv[i+1]);
 460             i++;
 461             if (config.datasize < 1) config.datasize=1;
 462             if (config.datasize > 1024*1024) config.datasize = 1024*1024;
 463         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 464             config.randomkeys = 1;
 465             config.randomkeys_keyspacelen = atoi(argv[i+1]);
 466             if (config.randomkeys_keyspacelen < 0)
 467                 config.randomkeys_keyspacelen = 0;
 468             i++;
 469         } else if (!strcmp(argv[i],"-q")) {
 470             config.quiet = 1;
 471         } else if (!strcmp(argv[i],"-l")) {
 472             config.loop = 1;
 473         } else if (!strcmp(argv[i],"-D")) {
 474             config.debug = 1;
 475         } else if (!strcmp(argv[i],"-I")) {
 476             config.idlemode = 1;
 477         } else {
 478             printf("Wrong option '%s' or option argument missing\n\n",argv[i]);
 479             printf("Usage: redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]\n\n");
 480             printf(" -h <hostname>      Server hostname (default 127.0.0.1)\n");
 481             printf(" -p <hostname>      Server port (default 6379)\n");
 482             printf(" -c <clients>       Number of parallel connections (default 50)\n");
 483             printf(" -n <requests>      Total number of requests (default 10000)\n");
 484             printf(" -d <size>          Data size of SET/GET value in bytes (default 2)\n");
 485             printf(" -k <boolean>       1=keep alive 0=reconnect (default 1)\n");
 486             printf(" -r <keyspacelen>   Use random keys for SET/GET/INCR, random values for SADD\n");
 487             printf("  Using this option the benchmark will get/set keys\n");
 488             printf("  in the form mykey_rand000000012456 instead of constant\n");
 489             printf("  keys, the <keyspacelen> argument determines the max\n");
 490             printf("  number of values for the random number. For instance\n");
 491             printf("  if set to 10 only rand000000000000 - rand000000000009\n");
 492             printf("  range will be allowed.\n");
 493             printf(" -q                 Quiet. Just show query/sec values\n");
 494             printf(" -l                 Loop. Run the tests forever\n");
 495             printf(" -I                 Idle mode. Just open N idle connections and wait.\n");
 496             printf(" -D                 Debug mode. more verbose.\n");
 497             exit(1);
 498         }
 499     }
 500 }
 501
 502 int showThroughput(struct aeEventLoop *eventLoop, long long id, void *clientData) {
 503     REDIS_NOTUSED(eventLoop);
 504     REDIS_NOTUSED(id);
 505     REDIS_NOTUSED(clientData);
 506
 507     float dt = (float)(mstime()-config.start)/1000.0;
 508     float rps = (float)config.donerequests/dt;
 509     printf("%s: %.2f\r", config.title, rps);
 510     fflush(stdout);
 511     return 250; /* every 250ms */
 512 }
 513
 514 int main(int argc, char **argv) {
 515     client c;
 516
 517     signal(SIGHUP, SIG_IGN);
 518     signal(SIGPIPE, SIG_IGN);
 519
 520     config.debug = 0;
 521     config.numclients = 50;
 522     config.requests = 10000;
 523     config.liveclients = 0;
 524     config.el = aeCreateEventLoop();
 525     aeCreateTimeEvent(config.el,1,showThroughput,NULL,NULL);
 526     config.keepalive = 1;
 527     config.donerequests = 0;
 528     config.datasize = 3;
 529     config.randomkeys = 0;
 530     config.randomkeys_keyspacelen = 0;
 531     config.quiet = 0;
 532     config.loop = 0;
 533     config.idlemode = 0;
 534     config.latency = NULL;
 535     config.clients = listCreate();
 536     config.latency = zmalloc(sizeof(int)*(MAX_LATENCY+1));
 537
 538     config.hostip = "127.0.0.1";
 539     config.hostport = 6379;
 540
 541     parseOptions(argc,argv);
 542
 543     if (config.keepalive == 0) {
 544         printf("WARNING: keepalive disabled, you probably need 'echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse' for Linux and 'sudo sysctl -w net.inet.tcp.msl=1000' for Mac OS X in order to use a lot of clients/requests\n");
 545     }
 546
 547     if (config.idlemode) {
 548         printf("Creating %d idle connections and waiting forever (Ctrl+C when done)\n", config.numclients);
 549         prepareForBenchmark("IDLE");
 550         c = createClient();
 551         if (!c) exit(1);
 552         c->obuf = sdsempty();
 553         prepareClientForReply(c,REPLY_RETCODE); /* will never receive it */
 554         createMissingClients(c);
 555         aeMain(config.el);
 556         /* and will wait for every */
 557     }
 558
 559     do {
 560         prepareForBenchmark("PING");
 561         c = createClient();
 562         if (!c) exit(1);
 563         c->obuf = sdscat(c->obuf,"PING\r\n");
 564         prepareClientForReply(c,REPLY_RETCODE);
 565         createMissingClients(c);
 566         aeMain(config.el);
 567         endBenchmark();
 568
 569         prepareForBenchmark("PING (multi bulk)");
 570         c = createClient();
 571         if (!c) exit(1);
 572         c->obuf = sdscat(c->obuf,"*1\r\n$4\r\nPING\r\n");
 573         prepareClientForReply(c,REPLY_RETCODE);
 574         createMissingClients(c);
 575         aeMain(config.el);
 576         endBenchmark();
 577
 578         prepareForBenchmark("SET");
 579         c = createClient();
 580         if (!c) exit(1);
 581         c->obuf = sdscatprintf(c->obuf,"SET foo_rand000000000000 %d\r\n",config.datasize);
 582         {
 583             char *data = zmalloc(config.datasize+2);
 584             memset(data,'x',config.datasize);
 585             data[config.datasize] = '\r';
 586             data[config.datasize+1] = '\n';
 587             c->obuf = sdscatlen(c->obuf,data,config.datasize+2);
 588         }
 589         prepareClientForReply(c,REPLY_RETCODE);
 590         createMissingClients(c);
 591         aeMain(config.el);
 592         endBenchmark();
 593
 594         prepareForBenchmark("GET");
 595         c = createClient();
 596         if (!c) exit(1);
 597         c->obuf = sdscat(c->obuf,"GET foo_rand000000000000\r\n");
 598         prepareClientForReply(c,REPLY_BULK);
 599         createMissingClients(c);
 600         aeMain(config.el);
 601         endBenchmark();
 602
 603         prepareForBenchmark("INCR");
 604         c = createClient();
 605         if (!c) exit(1);
 606         c->obuf = sdscat(c->obuf,"INCR counter_rand000000000000\r\n");
 607         prepareClientForReply(c,REPLY_INT);
 608         createMissingClients(c);
 609         aeMain(config.el);
 610         endBenchmark();
 611
 612         prepareForBenchmark("LPUSH");
 613         c = createClient();
 614         if (!c) exit(1);
 615         c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
 616         prepareClientForReply(c,REPLY_INT);
 617         createMissingClients(c);
 618         aeMain(config.el);
 619         endBenchmark();
 620
 621         prepareForBenchmark("LPOP");
 622         c = createClient();
 623         if (!c) exit(1);
 624         c->obuf = sdscat(c->obuf,"LPOP mylist\r\n");
 625         prepareClientForReply(c,REPLY_BULK);
 626         createMissingClients(c);
 627         aeMain(config.el);
 628         endBenchmark();
 629
 630         prepareForBenchmark("SADD");
 631         c = createClient();
 632         if (!c) exit(1);
 633         c->obuf = sdscat(c->obuf,"SADD myset 24\r\ncounter_rand000000000000\r\n");
 634         prepareClientForReply(c,REPLY_RETCODE);
 635         createMissingClients(c);
 636         aeMain(config.el);
 637         endBenchmark();
 638
 639         prepareForBenchmark("SPOP");
 640         c = createClient();
 641         if (!c) exit(1);
 642         c->obuf = sdscat(c->obuf,"SPOP myset\r\n");
 643         prepareClientForReply(c,REPLY_BULK);
 644         createMissingClients(c);
 645         aeMain(config.el);
 646         endBenchmark();
 647
 648         prepareForBenchmark("LPUSH (again, in order to bench LRANGE)");
 649         c = createClient();
 650         if (!c) exit(1);
 651         c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
 652         prepareClientForReply(c,REPLY_RETCODE);
 653         createMissingClients(c);
 654         aeMain(config.el);
 655         endBenchmark();
 656
 657         prepareForBenchmark("LRANGE (first 100 elements)");
 658         c = createClient();
 659         if (!c) exit(1);
 660         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 99\r\n");
 661         prepareClientForReply(c,REPLY_MBULK);
 662         createMissingClients(c);
 663         aeMain(config.el);
 664         endBenchmark();
 665
 666         prepareForBenchmark("LRANGE (first 300 elements)");
 667         c = createClient();
 668         if (!c) exit(1);
 669         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 299\r\n");
 670         prepareClientForReply(c,REPLY_MBULK);
 671         createMissingClients(c);
 672         aeMain(config.el);
 673         endBenchmark();
 674
 675         prepareForBenchmark("LRANGE (first 450 elements)");
 676         c = createClient();
 677         if (!c) exit(1);
 678         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 449\r\n");
 679         prepareClientForReply(c,REPLY_MBULK);
 680         createMissingClients(c);
 681         aeMain(config.el);
 682         endBenchmark();
 683
 684         prepareForBenchmark("LRANGE (first 600 elements)");
 685         c = createClient();
 686         if (!c) exit(1);
 687         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 599\r\n");
 688         prepareClientForReply(c,REPLY_MBULK);
 689         createMissingClients(c);
 690         aeMain(config.el);
 691         endBenchmark();
 692
 693         printf("\n");
 694     } while(config.loop);
 695
 696     return 0;
 697 }