Make replication faster (biggest gain for small number of slaves)

[redis.git] / src / redis-benchmark.c

diff --git a/src/redis-benchmark.c b/src/redis-benchmark.c
index 297ecc6c5a87ab28cc8f135fcd7842de4c26f4d4..618d9c030a8e761956514f070b305c861bd9eb86 100644 (file)
--- a/src/redis-benchmark.c
+++ b/src/redis-benchmark.c
@@ -40,22 +40,11 @@
 #include <assert.h>
 
 #include "ae.h"
 #include <assert.h>
 
 #include "ae.h"

-#include "anet.h"
+#include "hiredis.h"

 #include "sds.h"
 #include "adlist.h"
 #include "zmalloc.h"
 
 #include "sds.h"
 #include "adlist.h"
 #include "zmalloc.h"
 

-#define REPLY_INT 0
-#define REPLY_RETCODE 1
-#define REPLY_BULK 2
-#define REPLY_MBULK 3
-
-#define CLIENT_CONNECTING 0
-#define CLIENT_SENDQUERY 1
-#define CLIENT_READREPLY 2
-
-#define MAX_LATENCY 5000
-

 #define REDIS_NOTUSED(V) ((void) V)
 
 static struct config {
 #define REDIS_NOTUSED(V) ((void) V)
 
 static struct config {


@@ -71,10 +60,11 @@ static struct config {
     aeEventLoop *el;
     char *hostip;
     int hostport;
     aeEventLoop *el;
     char *hostip;
     int hostport;

+    char *hostsocket;

     int keepalive;
     long long start;
     long long totlatency;
     int keepalive;
     long long start;
     long long totlatency;

-    int *latency;
+    long long *latency;

     char *title;
     list *clients;
     int quiet;
     char *title;
     list *clients;
     int quiet;


@@ -83,16 +73,13 @@ static struct config {
 } config;
 
 typedef struct _client {
 } config;
 
 typedef struct _client {

-    int state;
-    int fd;
+    redisContext *context;

     sds obuf;
     sds obuf;

-    sds ibuf;
-    int mbulk;          /* Number of elements in an mbulk reply */
-    int readlen;        /* readlen == -1 means read a single line */
-    int totreceived;
-    unsigned int written;        /* bytes of 'obuf' already written */
-    int replytype;
-    long long start;    /* start time in milliseconds */
+    char *randptr[10]; /* needed for MSET against 10 keys */
+    size_t randlen;
+    unsigned int written; /* bytes of 'obuf' already written */
+    long long start; /* start time of a request */
+    long long latency; /* request latency */

 } *client;
 
 /* Prototypes */
 } *client;
 
 /* Prototypes */


@@ -100,6 +87,16 @@ static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 static void createMissingClients(client c);
 
 /* Implementation */
 static void createMissingClients(client c);
 
 /* Implementation */

+static long long ustime(void) {
+    struct timeval tv;
+    long long ust;
+
+    gettimeofday(&tv, NULL);
+    ust = ((long)tv.tv_sec)*1000000;
+    ust += tv.tv_usec;
+    return ust;
+}
+

 static long long mstime(void) {
     struct timeval tv;
     long long mst;
 static long long mstime(void) {
     struct timeval tv;
     long long mst;


@@ -112,12 +109,10 @@ static long long mstime(void) {
 
 static void freeClient(client c) {
     listNode *ln;
 
 static void freeClient(client c) {
     listNode *ln;

-
-    aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
-    aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
-    sdsfree(c->ibuf);
+    aeDeleteFileEvent(config.el,c->context->fd,AE_WRITABLE);
+    aeDeleteFileEvent(config.el,c->context->fd,AE_READABLE);
+    redisFree(c->context);

     sdsfree(c->obuf);
     sdsfree(c->obuf);

-    close(c->fd);

     zfree(c);
     config.liveclients--;
     ln = listSearchKey(config.clients,c);
     zfree(c);
     config.liveclients--;
     ln = listSearchKey(config.clients,c);


@@ -136,61 +131,24 @@ static void freeAllClients(void) {
 }
 
 static void resetClient(client c) {
 }
 
 static void resetClient(client c) {

-    aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
-    aeDeleteFileEvent(config.el,c->fd,AE_READABLE);
-    aeCreateFileEvent(config.el,c->fd, AE_WRITABLE,writeHandler,c);
-    sdsfree(c->ibuf);
-    c->ibuf = sdsempty();
-    c->readlen = (c->replytype == REPLY_BULK ||
-                  c->replytype == REPLY_MBULK) ? -1 : 0;
-    c->mbulk = -1;
+    aeDeleteFileEvent(config.el,c->context->fd,AE_WRITABLE);
+    aeDeleteFileEvent(config.el,c->context->fd,AE_READABLE);
+    aeCreateFileEvent(config.el,c->context->fd,AE_WRITABLE,writeHandler,c);

     c->written = 0;
     c->written = 0;

-    c->totreceived = 0;
-    c->state = CLIENT_SENDQUERY;
-    c->start = mstime();
-    createMissingClients(c);

 }
 
 static void randomizeClientKey(client c) {
 }
 
 static void randomizeClientKey(client c) {

-    char *p;

     char buf[32];
     char buf[32];

-    long r;
-
-    p = strstr(c->obuf, "_rand");
-    if (!p) return;
-    p += 5;
-    r = random() % config.randomkeys_keyspacelen;
-    sprintf(buf,"%ld",r);
-    memcpy(p,buf,strlen(buf));
-}
+    size_t i, r;

 
 

-static void prepareClientForReply(client c, int type) {
-    if (type == REPLY_BULK) {
-        c->replytype = REPLY_BULK;
-        c->readlen = -1;
-    } else if (type == REPLY_MBULK) {
-        c->replytype = REPLY_MBULK;
-        c->readlen = -1;
-        c->mbulk = -1;
-    } else {
-        c->replytype = type;
-        c->readlen = 0;
+    for (i = 0; i < c->randlen; i++) {
+        r = random() % config.randomkeys_keyspacelen;
+        snprintf(buf,sizeof(buf),"%012zu",r);
+        memcpy(c->randptr[i],buf,12);

     }
 }
 
 static void clientDone(client c) {
     }
 }
 
 static void clientDone(client c) {

-    static int last_tot_received = 1;
-
-    long long latency;
-    config.donerequests ++;
-    latency = mstime() - c->start;
-    if (latency > MAX_LATENCY) latency = MAX_LATENCY;
-    config.latency[latency]++;
-
-    if (config.debug && last_tot_received != c->totreceived) {
-        printf("Tot bytes received: %d\n", c->totreceived);
-        last_tot_received = c->totreceived;
-    }

     if (config.donerequests == config.requests) {
         freeClient(c);
         aeStop(config.el);
     if (config.donerequests == config.requests) {
         freeClient(c);
         aeStop(config.el);


@@ -198,7 +156,6 @@ static void clientDone(client c) {
     }
     if (config.keepalive) {
         resetClient(c);
     }
     if (config.keepalive) {
         resetClient(c);

-        if (config.randomkeys) randomizeClientKey(c);

     } else {
         config.liveclients--;
         createMissingClients(c);
     } else {
         config.liveclients--;
         createMissingClients(c);


@@ -207,139 +164,55 @@ static void clientDone(client c) {
     }
 }
 
     }
 }
 

-/* Read a length from the buffer pointed to by *p, store the length in *len,
- * and return the number of bytes that the cursor advanced. */
-static int readLen(char *p, int *len) {
-    char *tail = strstr(p,"\r\n");
-    if (tail == NULL)
-        return 0;
-    *tail = '\0';
-    *len = atoi(p+1);
-    return tail+2-p;
-}
-
-static void readHandler(aeEventLoop *el, int fd, void *privdata, int mask)
-{
-    char buf[1024], *p;
-    int nread, pos=0, len=0;
+static void readHandler(aeEventLoop *el, int fd, void *privdata, int mask) {

     client c = privdata;
     client c = privdata;

+    void *reply = NULL;

     REDIS_NOTUSED(el);
     REDIS_NOTUSED(fd);
     REDIS_NOTUSED(mask);
 
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(fd);
     REDIS_NOTUSED(mask);
 

-    nread = read(c->fd,buf,sizeof(buf));
-    if (nread == -1) {
-        fprintf(stderr, "Reading from socket: %s\n", strerror(errno));
-        freeClient(c);
-        return;
-    }
-    if (nread == 0) {
-        fprintf(stderr, "EOF from client\n");
-        freeClient(c);
-        return;
-    }
-    c->totreceived += nread;
-    c->ibuf = sdscatlen(c->ibuf,buf,nread);
-    len = sdslen(c->ibuf);
-
-    if (c->replytype == REPLY_INT ||
-        c->replytype == REPLY_RETCODE)
-    {
-        /* Check if the first line is complete. This is everything we need
-         * when waiting for an integer or status code reply.*/
-        if ((p = strstr(c->ibuf,"\r\n")) != NULL)
-            goto done;
-    } else if (c->replytype == REPLY_BULK) {
-        int advance = 0;
-        if (c->readlen < 0) {
-            advance = readLen(c->ibuf+pos,&c->readlen);
-            if (advance) {
-                pos += advance;
-                if (c->readlen == -1) {
-                    goto done;
-                } else {
-                    /* include the trailing \r\n */
-                    c->readlen += 2;
-                }
-            } else {
-                goto skip;
-            }
-        }
+    /* Calculate latency only for the first read event. This means that the
+     * server already sent the reply and we need to parse it. Parsing overhead
+     * is not part of the latency, so calculate it only once, here. */
+    if (c->latency < 0) c->latency = ustime()-(c->start);

 
 

-        int canconsume;
-        if (c->readlen > 0) {
-            canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
-            c->readlen -= canconsume;
-            pos += canconsume;
+    if (redisBufferRead(c->context) != REDIS_OK) {
+        fprintf(stderr,"Error: %s\n",c->context->errstr);
+        exit(1);
+    } else {
+        if (redisGetReply(c->context,&reply) != REDIS_OK) {
+            fprintf(stderr,"Error: %s\n",c->context->errstr);
+            exit(1);

         }
         }

-
-        if (c->readlen == 0)
-            goto done;
-    } else if (c->replytype == REPLY_MBULK) {
-        int advance = 0;
-        if (c->mbulk == -1) {
-            advance = readLen(c->ibuf+pos,&c->mbulk);
-            if (advance) {
-                pos += advance;
-                if (c->mbulk == -1)
-                    goto done;
-            } else {
-                goto skip;
+        if (reply != NULL) {
+            if (reply == (void*)REDIS_REPLY_ERROR) {
+                fprintf(stderr,"Unexpected error reply, exiting...\n");
+                exit(1);

             }
             }

-        }

 
 

-        int canconsume;
-        while(c->mbulk > 0 && pos < len) {
-            if (c->readlen > 0) {
-                canconsume = c->readlen > (len-pos) ? (len-pos) : c->readlen;
-                c->readlen -= canconsume;
-                pos += canconsume;
-                if (c->readlen == 0)
-                    c->mbulk--;
-            } else {
-                advance = readLen(c->ibuf+pos,&c->readlen);
-                if (advance) {
-                    pos += advance;
-                    if (c->readlen == -1) {
-                        c->mbulk--;
-                        continue;
-                    } else {
-                        /* include the trailing \r\n */
-                        c->readlen += 2;
-                    }
-                } else {
-                    goto skip;
-                }
-            }
+            if (config.donerequests < config.requests)
+                config.latency[config.donerequests++] = c->latency;
+            clientDone(c);

         }
         }

-
-        if (c->mbulk == 0)
-            goto done;

     }
     }

-
-skip:
-    c->ibuf = sdsrange(c->ibuf,pos,-1);
-    return;
-done:
-    clientDone(c);
-    return;

 }
 
 }
 

-static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask)
-{
+static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask) {

     client c = privdata;
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(fd);
     REDIS_NOTUSED(mask);
 
     client c = privdata;
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(fd);
     REDIS_NOTUSED(mask);
 

-    if (c->state == CLIENT_CONNECTING) {
-        c->state = CLIENT_SENDQUERY;
-        c->start = mstime();
+    /* When nothing was written yet, randomize keys and set start time. */
+    if (c->written == 0) {
+        if (config.randomkeys) randomizeClientKey(c);
+        c->start = ustime();
+        c->latency = -1;

     }
     }

+

     if (sdslen(c->obuf) > c->written) {
         void *ptr = c->obuf+c->written;
     if (sdslen(c->obuf) > c->written) {
         void *ptr = c->obuf+c->written;

-        int len = sdslen(c->obuf) - c->written;
-        int nwritten = write(c->fd, ptr, len);
+        int nwritten = write(c->context->fd,ptr,sdslen(c->obuf)-c->written);

         if (nwritten == -1) {
             if (errno != EPIPE)
                 fprintf(stderr, "Writing to socket: %s\n", strerror(errno));
         if (nwritten == -1) {
             if (errno != EPIPE)
                 fprintf(stderr, "Writing to socket: %s\n", strerror(errno));


@@ -348,50 +221,70 @@ static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask)
         }
         c->written += nwritten;
         if (sdslen(c->obuf) == c->written) {
         }
         c->written += nwritten;
         if (sdslen(c->obuf) == c->written) {

-            aeDeleteFileEvent(config.el,c->fd,AE_WRITABLE);
-            aeCreateFileEvent(config.el,c->fd,AE_READABLE,readHandler,c);
-            c->state = CLIENT_READREPLY;
+            aeDeleteFileEvent(config.el,c->context->fd,AE_WRITABLE);
+            aeCreateFileEvent(config.el,c->context->fd,AE_READABLE,readHandler,c);

         }
     }
 }
 
         }
     }
 }
 

-static client createClient(void) {
+static client createClient(char *cmd, int len) {

     client c = zmalloc(sizeof(struct _client));
     client c = zmalloc(sizeof(struct _client));

-    char err[ANET_ERR_LEN];
-
-    c->fd = anetTcpNonBlockConnect(err,config.hostip,config.hostport);
-    if (c->fd == ANET_ERR) {
-        zfree(c);
-        fprintf(stderr,"Connect: %s\n",err);
-        return NULL;
+    if (config.hostsocket == NULL) {
+        c->context = redisConnectNonBlock(config.hostip,config.hostport);
+    } else {
+        c->context = redisConnectUnixNonBlock(config.hostsocket);
+    }
+    if (c->context->err) {
+        fprintf(stderr,"Could not connect to Redis at ");
+        if (config.hostsocket == NULL)
+            fprintf(stderr,"%s:%d: %s\n",config.hostip,config.hostport,c->context->errstr);
+        else
+            fprintf(stderr,"%s: %s\n",config.hostsocket,c->context->errstr);
+        exit(1);

     }
     }

-    anetTcpNoDelay(NULL,c->fd);
-    c->obuf = sdsempty();
-    c->ibuf = sdsempty();
-    c->mbulk = -1;
-    c->readlen = 0;
+    c->obuf = sdsnewlen(cmd,len);
+    c->randlen = 0;

     c->written = 0;
     c->written = 0;

-    c->totreceived = 0;
-    c->state = CLIENT_CONNECTING;
-    aeCreateFileEvent(config.el, c->fd, AE_WRITABLE, writeHandler, c);
-    config.liveclients++;
+
+    /* Find substrings in the output buffer that need to be randomized. */
+    if (config.randomkeys) {
+        char *p = c->obuf, *newline;
+        while ((p = strstr(p,":rand:")) != NULL) {
+            newline = strstr(p,"\r\n");
+            assert(newline-(p+6) == 12); /* 12 chars for randomness */
+            assert(c->randlen < (signed)(sizeof(c->randptr)/sizeof(char*)));
+            c->randptr[c->randlen++] = p+6;
+            p = newline+2;
+        }
+    }
+
+    redisSetReplyObjectFunctions(c->context,NULL);
+    aeCreateFileEvent(config.el,c->context->fd,AE_WRITABLE,writeHandler,c);

     listAddNodeTail(config.clients,c);
     listAddNodeTail(config.clients,c);

+    config.liveclients++;

     return c;
 }
 
 static void createMissingClients(client c) {
     return c;
 }
 
 static void createMissingClients(client c) {

+    int n = 0;
+

     while(config.liveclients < config.numclients) {
     while(config.liveclients < config.numclients) {

-        client new = createClient();
-        if (!new) continue;
-        sdsfree(new->obuf);
-        new->obuf = sdsdup(c->obuf);
-        if (config.randomkeys) randomizeClientKey(c);
-        prepareClientForReply(new,c->replytype);
+        createClient(c->obuf,sdslen(c->obuf));
+
+        /* Listen backlog is quite limited on most systems */
+        if (++n > 64) {
+            usleep(50000);
+            n = 0;
+        }

     }
 }
 
     }
 }
 

+static int compareLatency(const void *a, const void *b) {
+    return (*(long long*)a)-(*(long long*)b);
+}
+

 static void showLatencyReport(void) {
 static void showLatencyReport(void) {

-    int j, seen = 0;
+    int i, curlat = 0;

     float perc, reqpersec;
 
     reqpersec = (float)config.donerequests/((float)config.totlatency/1000);
     float perc, reqpersec;
 
     reqpersec = (float)config.donerequests/((float)config.totlatency/1000);


@@ -403,11 +296,13 @@ static void showLatencyReport(void) {
         printf("  %d bytes payload\n", config.datasize);
         printf("  keep alive: %d\n", config.keepalive);
         printf("\n");
         printf("  %d bytes payload\n", config.datasize);
         printf("  keep alive: %d\n", config.keepalive);
         printf("\n");

-        for (j = 0; j <= MAX_LATENCY; j++) {
-            if (config.latency[j]) {
-                seen += config.latency[j];
-                perc = ((float)seen*100)/config.donerequests;
-                printf("%.2f%% <= %d milliseconds\n", perc, j);
+
+        qsort(config.latency,config.requests,sizeof(long long),compareLatency);
+        for (i = 0; i < config.requests; i++) {
+            if (config.latency[i]/1000 != curlat || i == (config.requests-1)) {
+                curlat = config.latency[i]/1000;
+                perc = ((float)(i+1)*100)/config.requests;
+                printf("%.2f%% <= %d milliseconds\n", perc, curlat);

             }
         }
         printf("%.2f requests per second\n\n", reqpersec);
             }
         }
         printf("%.2f requests per second\n\n", reqpersec);


@@ -416,15 +311,19 @@ static void showLatencyReport(void) {
     }
 }
 
     }
 }
 

-static void prepareForBenchmark(char *title) {
-    memset(config.latency,0,sizeof(int)*(MAX_LATENCY+1));
+static void benchmark(char *title, char *cmd, int len) {
+    client c;
+

     config.title = title;
     config.title = title;

-    config.start = mstime();

     config.donerequests = 0;
     config.donerequests = 0;

-}

 
 

-static void endBenchmark(void) {
+    c = createClient(cmd,len);
+    createMissingClients(c);
+
+    config.start = mstime();
+    aeMain(config.el);

     config.totlatency = mstime()-config.start;
     config.totlatency = mstime()-config.start;

+

     showLatencyReport();
     freeAllClients();
 }
     showLatencyReport();
     freeAllClients();
 }


@@ -445,16 +344,14 @@ void parseOptions(int argc, char **argv) {
             config.keepalive = atoi(argv[i+1]);
             i++;
         } else if (!strcmp(argv[i],"-h") && !lastarg) {
             config.keepalive = atoi(argv[i+1]);
             i++;
         } else if (!strcmp(argv[i],"-h") && !lastarg) {

-            char *ip = zmalloc(32);
-            if (anetResolve(NULL,argv[i+1],ip) == ANET_ERR) {
-                printf("Can't resolve %s\n", argv[i]);
-                exit(1);
-            }
-            config.hostip = ip;
+            config.hostip = argv[i+1];

             i++;
         } else if (!strcmp(argv[i],"-p") && !lastarg) {
             config.hostport = atoi(argv[i+1]);
             i++;
             i++;
         } else if (!strcmp(argv[i],"-p") && !lastarg) {
             config.hostport = atoi(argv[i+1]);
             i++;

+        } else if (!strcmp(argv[i],"-s") && !lastarg) {
+            config.hostsocket = argv[i+1];
+            i++;

         } else if (!strcmp(argv[i],"-d") && !lastarg) {
             config.datasize = atoi(argv[i+1]);
             i++;
         } else if (!strcmp(argv[i],"-d") && !lastarg) {
             config.datasize = atoi(argv[i+1]);
             i++;


@@ -478,7 +375,8 @@ void parseOptions(int argc, char **argv) {
             printf("Wrong option '%s' or option argument missing\n\n",argv[i]);
             printf("Usage: redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]\n\n");
             printf(" -h <hostname>      Server hostname (default 127.0.0.1)\n");
             printf("Wrong option '%s' or option argument missing\n\n",argv[i]);
             printf("Usage: redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]\n\n");
             printf(" -h <hostname>      Server hostname (default 127.0.0.1)\n");

-            printf(" -p <hostname>      Server port (default 6379)\n");
+            printf(" -p <port>          Server port (default 6379)\n");
+            printf(" -s <socket>        Server socket (overrides host and port)\n");

             printf(" -c <clients>       Number of parallel connections (default 50)\n");
             printf(" -n <requests>      Total number of requests (default 10000)\n");
             printf(" -d <size>          Data size of SET/GET value in bytes (default 2)\n");
             printf(" -c <clients>       Number of parallel connections (default 50)\n");
             printf(" -n <requests>      Total number of requests (default 10000)\n");
             printf(" -d <size>          Data size of SET/GET value in bytes (default 2)\n");


@@ -512,6 +410,7 @@ int showThroughput(struct aeEventLoop *eventLoop, long long id, void *clientData
 }
 
 int main(int argc, char **argv) {
 }
 
 int main(int argc, char **argv) {

+    int i;

     client c;
 
     signal(SIGHUP, SIG_IGN);
     client c;
 
     signal(SIGHUP, SIG_IGN);


@@ -533,12 +432,12 @@ int main(int argc, char **argv) {
     config.idlemode = 0;
     config.latency = NULL;
     config.clients = listCreate();
     config.idlemode = 0;
     config.latency = NULL;
     config.clients = listCreate();

-    config.latency = zmalloc(sizeof(int)*(MAX_LATENCY+1));
-

     config.hostip = "127.0.0.1";
     config.hostport = 6379;
     config.hostip = "127.0.0.1";
     config.hostport = 6379;

+    config.hostsocket = NULL;

 
     parseOptions(argc,argv);
 
     parseOptions(argc,argv);

+    config.latency = zmalloc(sizeof(long long)*config.requests);

 
     if (config.keepalive == 0) {
         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");
 
     if (config.keepalive == 0) {
         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");


@@ -546,149 +445,83 @@ int main(int argc, char **argv) {
 
     if (config.idlemode) {
         printf("Creating %d idle connections and waiting forever (Ctrl+C when done)\n", config.numclients);
 
     if (config.idlemode) {
         printf("Creating %d idle connections and waiting forever (Ctrl+C when done)\n", config.numclients);

-        prepareForBenchmark("IDLE");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdsempty();
-        prepareClientForReply(c,REPLY_RETCODE); /* will never receive it */
+        c = createClient("",0); /* will never receive a reply */

         createMissingClients(c);
         aeMain(config.el);
         /* and will wait for every */
     }
 
     do {
         createMissingClients(c);
         aeMain(config.el);
         /* and will wait for every */
     }
 
     do {

-        prepareForBenchmark("PING");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"PING\r\n");
-        prepareClientForReply(c,REPLY_RETCODE);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        char *data, *cmd;
+        int len;

 
 

-        prepareForBenchmark("PING (multi bulk)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"*1\r\n$4\r\nPING\r\n");
-        prepareClientForReply(c,REPLY_RETCODE);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
-
-        prepareForBenchmark("SET");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscatprintf(c->obuf,"SET foo_rand000000000000 %d\r\n",config.datasize);
-        {
-            char *data = zmalloc(config.datasize+2);
-            memset(data,'x',config.datasize);
-            data[config.datasize] = '\r';
-            data[config.datasize+1] = '\n';
-            c->obuf = sdscatlen(c->obuf,data,config.datasize+2);
+        data = zmalloc(config.datasize+1);
+        memset(data,'x',config.datasize);
+        data[config.datasize] = '\0';
+
+        benchmark("PING (inline)","PING\r\n",6);
+
+        len = redisFormatCommand(&cmd,"PING");
+        benchmark("PING",cmd,len);
+        free(cmd);
+
+        const char *argv[21];
+        argv[0] = "MSET";
+        for (i = 1; i < 21; i += 2) {
+            argv[i] = "foo:rand:000000000000";
+            argv[i+1] = data;

         }
         }

-        prepareClientForReply(c,REPLY_RETCODE);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommandArgv(&cmd,21,argv,NULL);
+        benchmark("MSET (10 keys)",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("GET");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"GET foo_rand000000000000\r\n");
-        prepareClientForReply(c,REPLY_BULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"SET foo:rand:000000000000 %s",data);
+        benchmark("SET",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("INCR");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"INCR counter_rand000000000000\r\n");
-        prepareClientForReply(c,REPLY_INT);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"GET foo:rand:000000000000");
+        benchmark("GET",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LPUSH");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
-        prepareClientForReply(c,REPLY_INT);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"INCR counter:rand:000000000000");
+        benchmark("INCR",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LPOP");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LPOP mylist\r\n");
-        prepareClientForReply(c,REPLY_BULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LPUSH mylist %s",data);
+        benchmark("LPUSH",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("SADD");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"SADD myset 24\r\ncounter_rand000000000000\r\n");
-        prepareClientForReply(c,REPLY_RETCODE);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LPOP mylist");
+        benchmark("LPOP",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("SPOP");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"SPOP myset\r\n");
-        prepareClientForReply(c,REPLY_BULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"SADD myset counter:rand:000000000000");
+        benchmark("SADD",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LPUSH (again, in order to bench LRANGE)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LPUSH mylist 3\r\nbar\r\n");
-        prepareClientForReply(c,REPLY_RETCODE);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"SPOP myset");
+        benchmark("SPOP",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LRANGE (first 100 elements)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LRANGE mylist 0 99\r\n");
-        prepareClientForReply(c,REPLY_MBULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LPUSH mylist %s",data);
+        benchmark("LPUSH (again, in order to bench LRANGE)",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LRANGE (first 300 elements)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LRANGE mylist 0 299\r\n");
-        prepareClientForReply(c,REPLY_MBULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LRANGE mylist 0 99");
+        benchmark("LRANGE (first 100 elements)",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LRANGE (first 450 elements)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LRANGE mylist 0 449\r\n");
-        prepareClientForReply(c,REPLY_MBULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LRANGE mylist 0 299");
+        benchmark("LRANGE (first 300 elements)",cmd,len);
+        free(cmd);

 
 

-        prepareForBenchmark("LRANGE (first 600 elements)");
-        c = createClient();
-        if (!c) exit(1);
-        c->obuf = sdscat(c->obuf,"LRANGE mylist 0 599\r\n");
-        prepareClientForReply(c,REPLY_MBULK);
-        createMissingClients(c);
-        aeMain(config.el);
-        endBenchmark();
+        len = redisFormatCommand(&cmd,"LRANGE mylist 0 449");
+        benchmark("LRANGE (first 450 elements)",cmd,len);
+        free(cmd);
+
+        len = redisFormatCommand(&cmd,"LRANGE mylist 0 599");
+        benchmark("LRANGE (first 600 elements)",cmd,len);
+        free(cmd);

 
         printf("\n");
     } while(config.loop);
 
         printf("\n");
     } while(config.loop);