Function latencyDistMode

app/redis-6.2.6/src/redis-cli.c:6974–7050

}

static void latencyDistMode(void) {
    redisReply *reply;
    long long start, latency, count = 0;
    long long history_interval =
        config.interval ? config.interval/1000 :
                          LATENCY_DIST_DEFAULT_INTERVAL;
    long long history_start = ustime();
    int j, outputs = 0;

    struct distsamples samples[] = {
        /* We use a mostly logarithmic scale, with certain linear intervals
         * which are more interesting than others, like 1-10 milliseconds
         * range. */
        {10,0,'.'},         /* 0.01 ms */
        {125,0,'-'},        /* 0.125 ms */
        {250,0,'*'},        /* 0.25 ms */
        {500,0,'#'},        /* 0.5 ms */
        {1000,0,'1'},       /* 1 ms */
        {2000,0,'2'},       /* 2 ms */
        {3000,0,'3'},       /* 3 ms */
        {4000,0,'4'},       /* 4 ms */
        {5000,0,'5'},       /* 5 ms */
        {6000,0,'6'},       /* 6 ms */
        {7000,0,'7'},       /* 7 ms */
        {8000,0,'8'},       /* 8 ms */
        {9000,0,'9'},       /* 9 ms */
        {10000,0,'A'},      /* 10 ms */
        {20000,0,'B'},      /* 20 ms */
        {30000,0,'C'},      /* 30 ms */
        {40000,0,'D'},      /* 40 ms */
        {50000,0,'E'},      /* 50 ms */
        {100000,0,'F'},     /* 0.1 s */
        {200000,0,'G'},     /* 0.2 s */
        {300000,0,'H'},     /* 0.3 s */
        {400000,0,'I'},     /* 0.4 s */
        {500000,0,'J'},     /* 0.5 s */
        {1000000,0,'K'},    /* 1 s */
        {2000000,0,'L'},    /* 2 s */
        {4000000,0,'M'},    /* 4 s */
        {8000000,0,'N'},    /* 8 s */
        {16000000,0,'O'},   /* 16 s */
        {30000000,0,'P'},   /* 30 s */
        {60000000,0,'Q'},   /* 1 minute */
        {0,0,'?'},          /* > 1 minute */
    };

    if (!context) exit(1);
    while(1) {
        start = ustime();
        reply = reconnectingRedisCommand(context,"PING");
        if (reply == NULL) {
            fprintf(stderr,"\nI/O error\n");
            exit(1);
        }
        latency = ustime()-start;
        freeReplyObject(reply);
        count++;