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     list *clients;
  79     int quiet;
  80     int loop;
  81     int idlemode;
  82 } config;
  83
  84 typedef struct _client {
  85     int state;
  86     int fd;
  87     sds obuf;
  88     sds ibuf;
  89     int mbulk;          /* Number of elements in an mbulk reply */
  90     int readlen;        /* readlen == -1 means read a single line */
  91     int totreceived;
  92     unsigned int written;        /* bytes of 'obuf' already written */
  93     int replytype;
  94     long long start;    /* start time in milliseconds */
  95 } *client;
  96
  97 /* Prototypes */
  98 static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask);
  99 static void createMissingClients(client c);
 100
 101 /* Implementation */
 102 static long long mstime(void) {
 103     struct timeval tv;
 104     long long mst;
 105
 106     gettimeofday(&tv, NULL);
 107     mst = ((long)tv.tv_sec)*1000;
 108     mst += tv.tv_usec/1000;
 109     return mst;
 110 }
 111
 112 static void freeClient(client c) {
 113     listNode *ln;
 114
 115     aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 116     aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
 117     sdsfree(c->ibuf);
 118     sdsfree(c->obuf);
 119     close(c->fd);
 120     zfree(c);
 121     config.liveclients--;
 122     ln = listSearchKey(config.clients,c);
 123     assert(ln != NULL);
 124     listDelNode(config.clients,ln);
 125 }
 126
 127 static void freeAllClients(void) {
 128     listNode *ln = config.clients->head, *next;
 129
 130     while(ln) {
 131         next = ln->next;
 132         freeClient(ln->value);
 133         ln = next;
 134     }
 135 }
 136
 137 static void resetClient(client c) {
 138     aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 139     aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
 140     aeCreateFileEvent(config.el,c->fd, AE_WRITABLE,writeHandler,c);
 141     sdsfree(c->ibuf);
 142     c->ibuf = sdsempty();
 143     c->readlen = (c->replytype == REPLY_BULK ||
 144                   c->replytype == REPLY_MBULK) ? -1 : 0;
 145     c->mbulk = -1;
 146     c->written = 0;
 147     c->totreceived = 0;
 148     c->state = CLIENT_SENDQUERY;
 149     c->start = mstime();
 150     createMissingClients(c);
 151 }
 152
 153 static void randomizeClientKey(client c) {
 154     char *p;
 155     char buf[32];
 156     long r;
 157
 158     p = strstr(c->obuf, "_rand");
 159     if (!p) return;
 160     p += 5;
 161     r = random() % config.randomkeys_keyspacelen;
 162     sprintf(buf,"%ld",r);
 163     memcpy(p,buf,strlen(buf));
 164 }
 165
 166 static void prepareClientForReply(client c, int type) {
 167     if (type == REPLY_BULK) {
 168         c->replytype = REPLY_BULK;
 169         c->readlen = -1;
 170     } else if (type == REPLY_MBULK) {
 171         c->replytype = REPLY_MBULK;
 172         c->readlen = -1;
 173         c->mbulk = -1;
 174     } else {
 175         c->replytype = type;
 176         c->readlen = 0;
 177     }
 178 }
 179
 180 static void clientDone(client c) {
 181     static int last_tot_received = 1;
 182
 183     long long latency;
 184     config.donerequests ++;
 185     latency = mstime() - c->start;
 186     if (latency > MAX_LATENCY) latency = MAX_LATENCY;
 187     config.latency[latency]++;
 188
 189     if (config.debug && last_tot_received != c->totreceived) {
 190         printf("Tot bytes received: %d\n", c->totreceived);
 191         last_tot_received = c->totreceived;
 192     }
 193     if (config.donerequests == config.requests) {
 194         freeClient(c);
 195         aeStop(config.el);
 196         return;
 197     }
 198     if (config.keepalive) {
 199         resetClient(c);
 200         if (config.randomkeys) randomizeClientKey(c);
 201     } else {
 202         config.liveclients--;
 203         createMissingClients(c);
 204         config.liveclients++;
 205         freeClient(c);
 206     }
 207 }
 208
 209 /* Read a length from the buffer pointed to by *p, store the length in *len,
 210  * and return the number of bytes that the cursor advanced. */
 211 static int readLen(char *p, int *len) {
 212     char *tail = strstr(p,"\r\n");
 213     if (tail == NULL)
 214         return 0;
 215     *tail = '\0';
 216     *len = atoi(p+1);
 217     return tail+2-p;
 218 }
 219
 220 static void readHandler(aeEventLoop *el, int fd, void *privdata, int mask)
 221 {
 222     char buf[1024], *p;
 223     int nread, pos=0, len=0;
 224     client c = privdata;
 225     REDIS_NOTUSED(el);
 226     REDIS_NOTUSED(fd);
 227     REDIS_NOTUSED(mask);
 228
 229     nread = read(c->fd,buf,sizeof(buf));
 230     if (nread == -1) {
 231         fprintf(stderr, "Reading from socket: %s\n", strerror(errno));
 232         freeClient(c);
 233         return;
 234     }
 235     if (nread == 0) {
 236         fprintf(stderr, "EOF from client\n");
 237         freeClient(c);
 238         return;
 239     }
 240     c->totreceived += nread;
 241     c->ibuf = sdscatlen(c->ibuf,buf,nread);
 242     len = sdslen(c->ibuf);
 243
 244     if (c->replytype == REPLY_INT ||
 245         c->replytype == REPLY_RETCODE)
 246     {
 247         /* Check if the first line is complete. This is everything we need
 248          * when waiting for an integer or status code reply.*/
 249         if ((p = strstr(c->ibuf,"\r\n")) != NULL)
 250             goto done;
 251     } else if (c->replytype == REPLY_BULK) {
 252         int advance = 0;
 253         if (c->readlen < 0) {
 254             advance = readLen(c->ibuf+pos,&c->readlen);
 255             if (advance) {
 256                 pos += advance;
 257                 if (c->readlen == -1) {
 258                     goto done;
 259                 } else {
 260                     /* include the trailing \r\n */
 261                     c->readlen += 2;
 262                 }
 263             } else {
 264                 goto skip;
 265             }
 266         }
 267
 268         int canconsume;
 269         if (c->readlen > 0) {
 270             canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
 271             c->readlen -= canconsume;
 272             pos += canconsume;
 273         }
 274
 275         if (c->readlen == 0)
 276             goto done;
 277     } else if (c->replytype == REPLY_MBULK) {
 278         int advance = 0;
 279         if (c->mbulk == -1) {
 280             advance = readLen(c->ibuf+pos,&c->mbulk);
 281             if (advance) {
 282                 pos += advance;
 283                 if (c->mbulk == -1)
 284                     goto done;
 285             } else {
 286                 goto skip;
 287             }
 288         }
 289
 290         int canconsume;
 291         while(c->mbulk > 0 && pos < len) {
 292             if (c->readlen > 0) {
 293                 canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
 294                 c->readlen -= canconsume;
 295                 pos += canconsume;
 296                 if (c->readlen == 0)
 297                     c->mbulk--;
 298             } else {
 299                 advance = readLen(c->ibuf+pos,&c->readlen);
 300                 if (advance) {
 301                     pos += advance;
 302                     if (c->readlen == -1) {
 303                         c->mbulk--;
 304                         continue;
 305                     } else {
 306                         /* include the trailing \r\n */
 307                         c->readlen += 2;
 308                     }
 309                 } else {
 310                     goto skip;
 311                 }
 312             }
 313         }
 314
 315         if (c->mbulk == 0)
 316             goto done;
 317     }
 318
 319 skip:
 320     c->ibuf = sdsrange(c->ibuf,pos,-1);
 321     return;
 322 done:
 323     clientDone(c);
 324     return;
 325 }
 326
 327 static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask)
 328 {
 329     client c = privdata;
 330     REDIS_NOTUSED(el);
 331     REDIS_NOTUSED(fd);
 332     REDIS_NOTUSED(mask);
 333
 334     if (c->state == CLIENT_CONNECTING) {
 335         c->state = CLIENT_SENDQUERY;
 336         c->start = mstime();
 337     }
 338     if (sdslen(c->obuf) > c->written) {
 339         void *ptr = c->obuf+c->written;
 340         int len = sdslen(c->obuf) - c->written;
 341         int nwritten = write(c->fd, ptr, len);
 342         if (nwritten == -1) {
 343             if (errno != EPIPE)
 344                 fprintf(stderr, "Writing to socket: %s\n", strerror(errno));
 345             freeClient(c);
 346             return;
 347         }
 348         c->written += nwritten;
 349         if (sdslen(c->obuf) == c->written) {
 350             aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
 351             aeCreateFileEvent(config.el,c->fd,AE_READABLE,readHandler,c);
 352             c->state = CLIENT_READREPLY;
 353         }
 354     }
 355 }
 356
 357 static client createClient(void) {
 358     client c = zmalloc(sizeof(struct _client));
 359     char err[ANET_ERR_LEN];
 360
 361     c->fd = anetTcpNonBlockConnect(err,config.hostip,config.hostport);
 362     if (c->fd == ANET_ERR) {
 363         zfree(c);
 364         fprintf(stderr,"Connect: %s\n",err);
 365         return NULL;
 366     }
 367     anetTcpNoDelay(NULL,c->fd);
 368     c->obuf = sdsempty();
 369     c->ibuf = sdsempty();
 370     c->mbulk = -1;
 371     c->readlen = 0;
 372     c->written = 0;
 373     c->totreceived = 0;
 374     c->state = CLIENT_CONNECTING;
 375     aeCreateFileEvent(config.el, c->fd, AE_WRITABLE, writeHandler, c);
 376     config.liveclients++;
 377     listAddNodeTail(config.clients,c);
 378     return c;
 379 }
 380
 381 static void createMissingClients(client c) {
 382     while(config.liveclients < config.numclients) {
 383         client new = createClient();
 384         if (!new) continue;
 385         sdsfree(new->obuf);
 386         new->obuf = sdsdup(c->obuf);
 387         if (config.randomkeys) randomizeClientKey(c);
 388         prepareClientForReply(new,c->replytype);
 389     }
 390 }
 391
 392 static void showLatencyReport(char *title) {
 393     int j, seen = 0;
 394     float perc, reqpersec;
 395
 396     reqpersec = (float)config.donerequests/((float)config.totlatency/1000);
 397     if (!config.quiet) {
 398         printf("====== %s ======\n", title);
 399         printf("  %d requests completed in %.2f seconds\n", config.donerequests,
 400             (float)config.totlatency/1000);
 401         printf("  %d parallel clients\n", config.numclients);
 402         printf("  %d bytes payload\n", config.datasize);
 403         printf("  keep alive: %d\n", config.keepalive);
 404         printf("\n");
 405         for (j = 0; j <= MAX_LATENCY; j++) {
 406             if (config.latency[j]) {
 407                 seen += config.latency[j];
 408                 perc = ((float)seen*100)/config.donerequests;
 409                 printf("%.2f%% <= %d milliseconds\n", perc, j);
 410             }
 411         }
 412         printf("%.2f requests per second\n\n", reqpersec);
 413     } else {
 414         printf("%s: %.2f requests per second\n", title, reqpersec);
 415     }
 416 }
 417
 418 static void prepareForBenchmark(void)
 419 {
 420     memset(config.latency,0,sizeof(int)*(MAX_LATENCY+1));
 421     config.start = mstime();
 422     config.donerequests = 0;
 423 }
 424
 425 static void endBenchmark(char *title) {
 426     config.totlatency = mstime()-config.start;
 427     showLatencyReport(title);
 428     freeAllClients();
 429 }
 430
 431 void parseOptions(int argc, char **argv) {
 432     int i;
 433
 434     for (i = 1; i < argc; i++) {
 435         int lastarg = i==argc-1;
 436
 437         if (!strcmp(argv[i],"-c") && !lastarg) {
 438             config.numclients = atoi(argv[i+1]);
 439             i++;
 440         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 441             config.requests = atoi(argv[i+1]);
 442             i++;
 443         } else if (!strcmp(argv[i],"-k") && !lastarg) {
 444             config.keepalive = atoi(argv[i+1]);
 445             i++;
 446         } else if (!strcmp(argv[i],"-h") && !lastarg) {
 447             char *ip = zmalloc(32);
 448             if (anetResolve(NULL,argv[i+1],ip) == ANET_ERR) {
 449                 printf("Can't resolve %s\n", argv[i]);
 450                 exit(1);
 451             }
 452             config.hostip = ip;
 453             i++;
 454         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 455             config.hostport = atoi(argv[i+1]);
 456             i++;
 457         } else if (!strcmp(argv[i],"-d") && !lastarg) {
 458             config.datasize = atoi(argv[i+1]);
 459             i++;
 460             if (config.datasize < 1) config.datasize=1;
 461             if (config.datasize > 1024*1024) config.datasize = 1024*1024;
 462         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 463             config.randomkeys = 1;
 464             config.randomkeys_keyspacelen = atoi(argv[i+1]);
 465             if (config.randomkeys_keyspacelen < 0)
 466                 config.randomkeys_keyspacelen = 0;
 467             i++;
 468         } else if (!strcmp(argv[i],"-q")) {
 469             config.quiet = 1;
 470         } else if (!strcmp(argv[i],"-l")) {
 471             config.loop = 1;
 472         } else if (!strcmp(argv[i],"-D")) {
 473             config.debug = 1;
 474         } else if (!strcmp(argv[i],"-I")) {
 475             config.idlemode = 1;
 476         } else {
 477             printf("Wrong option '%s' or option argument missing\n\n",argv[i]);
 478             printf("Usage: redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]\n\n");
 479             printf(" -h <hostname>      Server hostname (default 127.0.0.1)\n");
 480             printf(" -p <hostname>      Server port (default 6379)\n");
 481             printf(" -c <clients>       Number of parallel connections (default 50)\n");
 482             printf(" -n <requests>      Total number of requests (default 10000)\n");
 483             printf(" -d <size>          Data size of SET/GET value in bytes (default 2)\n");
 484             printf(" -k <boolean>       1=keep alive 0=reconnect (default 1)\n");
 485             printf(" -r <keyspacelen>   Use random keys for SET/GET/INCR, random values for SADD\n");
 486             printf("  Using this option the benchmark will get/set keys\n");
 487             printf("  in the form mykey_rand000000012456 instead of constant\n");
 488             printf("  keys, the <keyspacelen> argument determines the max\n");
 489             printf("  number of values for the random number. For instance\n");
 490             printf("  if set to 10 only rand000000000000 - rand000000000009\n");
 491             printf("  range will be allowed.\n");
 492             printf(" -q                 Quiet. Just show query/sec values\n");
 493             printf(" -l                 Loop. Run the tests forever\n");
 494             printf(" -I                 Idle mode. Just open N idle connections and wait.\n");
 495             printf(" -D                 Debug mode. more verbose.\n");
 496             exit(1);
 497         }
 498     }
 499 }
 500
 501 int main(int argc, char **argv) {
 502     client c;
 503
 504     signal(SIGHUP, SIG_IGN);
 505     signal(SIGPIPE, SIG_IGN);
 506
 507     config.debug = 0;
 508     config.numclients = 50;
 509     config.requests = 10000;
 510     config.liveclients = 0;
 511     config.el = aeCreateEventLoop();
 512     config.keepalive = 1;
 513     config.donerequests = 0;
 514     config.datasize = 3;
 515     config.randomkeys = 0;
 516     config.randomkeys_keyspacelen = 0;
 517     config.quiet = 0;
 518     config.loop = 0;
 519     config.idlemode = 0;
 520     config.latency = NULL;
 521     config.clients = listCreate();
 522     config.latency = zmalloc(sizeof(int)*(MAX_LATENCY+1));
 523
 524     config.hostip = "127.0.0.1";
 525     config.hostport = 6379;
 526
 527     parseOptions(argc,argv);
 528
 529     if (config.keepalive == 0) {
 530         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");
 531     }
 532
 533     if (config.idlemode) {
 534         printf("Creating %d idle connections and waiting forever (Ctrl+C when done)\n", config.numclients);
 535         prepareForBenchmark();
 536         c = createClient();
 537         if (!c) exit(1);
 538         c->obuf = sdsempty();
 539         prepareClientForReply(c,REPLY_RETCODE); /* will never receive it */
 540         createMissingClients(c);
 541         aeMain(config.el);
 542         /* and will wait for every */
 543     }
 544
 545     do {
 546         prepareForBenchmark();
 547         c = createClient();
 548         if (!c) exit(1);
 549         c->obuf = sdscat(c->obuf,"PING\r\n");
 550         prepareClientForReply(c,REPLY_RETCODE);
 551         createMissingClients(c);
 552         aeMain(config.el);
 553         endBenchmark("PING");
 554
 555         prepareForBenchmark();
 556         c = createClient();
 557         if (!c) exit(1);
 558         c->obuf = sdscat(c->obuf,"*1\r\n$4\r\nPING\r\n");
 559         prepareClientForReply(c,REPLY_RETCODE);
 560         createMissingClients(c);
 561         aeMain(config.el);
 562         endBenchmark("PING (multi bulk)");
 563
 564         prepareForBenchmark();
 565         c = createClient();
 566         if (!c) exit(1);
 567         c->obuf = sdscatprintf(c->obuf,"SET foo_rand000000000000 %d\r\n",config.datasize);
 568         {
 569             char *data = zmalloc(config.datasize+2);
 570             memset(data,'x',config.datasize);
 571             data[config.datasize] = '\r';
 572             data[config.datasize+1] = '\n';
 573             c->obuf = sdscatlen(c->obuf,data,config.datasize+2);
 574         }
 575         prepareClientForReply(c,REPLY_RETCODE);
 576         createMissingClients(c);
 577         aeMain(config.el);
 578         endBenchmark("SET");
 579
 580         prepareForBenchmark();
 581         c = createClient();
 582         if (!c) exit(1);
 583         c->obuf = sdscat(c->obuf,"GET foo_rand000000000000\r\n");
 584         prepareClientForReply(c,REPLY_BULK);
 585         createMissingClients(c);
 586         aeMain(config.el);
 587         endBenchmark("GET");
 588
 589         prepareForBenchmark();
 590         c = createClient();
 591         if (!c) exit(1);
 592         c->obuf = sdscat(c->obuf,"INCR counter_rand000000000000\r\n");
 593         prepareClientForReply(c,REPLY_INT);
 594         createMissingClients(c);
 595         aeMain(config.el);
 596         endBenchmark("INCR");
 597
 598         prepareForBenchmark();
 599         c = createClient();
 600         if (!c) exit(1);
 601         c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
 602         prepareClientForReply(c,REPLY_INT);
 603         createMissingClients(c);
 604         aeMain(config.el);
 605         endBenchmark("LPUSH");
 606
 607         prepareForBenchmark();
 608         c = createClient();
 609         if (!c) exit(1);
 610         c->obuf = sdscat(c->obuf,"LPOP mylist\r\n");
 611         prepareClientForReply(c,REPLY_BULK);
 612         createMissingClients(c);
 613         aeMain(config.el);
 614         endBenchmark("LPOP");
 615
 616         prepareForBenchmark();
 617         c = createClient();
 618         if (!c) exit(1);
 619         c->obuf = sdscat(c->obuf,"SADD myset 24\r\ncounter_rand000000000000\r\n");
 620         prepareClientForReply(c,REPLY_RETCODE);
 621         createMissingClients(c);
 622         aeMain(config.el);
 623         endBenchmark("SADD");
 624
 625         prepareForBenchmark();
 626         c = createClient();
 627         if (!c) exit(1);
 628         c->obuf = sdscat(c->obuf,"SPOP myset\r\n");
 629         prepareClientForReply(c,REPLY_BULK);
 630         createMissingClients(c);
 631         aeMain(config.el);
 632         endBenchmark("SPOP");
 633
 634         prepareForBenchmark();
 635         c = createClient();
 636         if (!c) exit(1);
 637         c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
 638         prepareClientForReply(c,REPLY_RETCODE);
 639         createMissingClients(c);
 640         aeMain(config.el);
 641         endBenchmark("LPUSH (again, in order to bench LRANGE)");
 642
 643         prepareForBenchmark();
 644         c = createClient();
 645         if (!c) exit(1);
 646         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 99\r\n");
 647         prepareClientForReply(c,REPLY_MBULK);
 648         createMissingClients(c);
 649         aeMain(config.el);
 650         endBenchmark("LRANGE (first 100 elements)");
 651
 652         prepareForBenchmark();
 653         c = createClient();
 654         if (!c) exit(1);
 655         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 299\r\n");
 656         prepareClientForReply(c,REPLY_MBULK);
 657         createMissingClients(c);
 658         aeMain(config.el);
 659         endBenchmark("LRANGE (first 300 elements)");
 660
 661         prepareForBenchmark();
 662         c = createClient();
 663         if (!c) exit(1);
 664         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 449\r\n");
 665         prepareClientForReply(c,REPLY_MBULK);
 666         createMissingClients(c);
 667         aeMain(config.el);
 668         endBenchmark("LRANGE (first 450 elements)");
 669
 670         prepareForBenchmark();
 671         c = createClient();
 672         if (!c) exit(1);
 673         c->obuf = sdscat(c->obuf,"LRANGE mylist 0 599\r\n");
 674         prepareClientForReply(c,REPLY_MBULK);
 675         createMissingClients(c);
 676         aeMain(config.el);
 677         endBenchmark("LRANGE (first 600 elements)");
 678
 679         printf("\n");
 680     } while(config.loop);
 681
 682     return 0;
 683 }