stat: avoid hang with race in stat thread exit and rusage update
[fio.git] / stat.c
diff --git a/stat.c b/stat.c
index 542e910606ff16043547aa57272bca45aa002b90..3aae76df431e7d9acdb56ec31a2b8a172da195a1 100644 (file)
--- a/stat.c
+++ b/stat.c
 #include "fio.h"
 #include "diskutil.h"
 #include "lib/ieee754.h"
+#include "json.h"
+#include "lib/getrusage.h"
+#include "idletime.h"
+
+static struct fio_mutex *stat_mutex;
 
 void update_rusage_stat(struct thread_data *td)
 {
        struct thread_stat *ts = &td->ts;
 
-       getrusage(RUSAGE_SELF, &td->ru_end);
-
+       fio_getrusage(&td->ru_end);
        ts->usr_time += mtime_since(&td->ru_start.ru_utime,
                                        &td->ru_end.ru_utime);
        ts->sys_time += mtime_since(&td->ru_start.ru_stime,
@@ -63,12 +67,12 @@ static unsigned int plat_val_to_idx(unsigned int val)
 
        /*
         * Discard the error bits and apply the mask to find the
-         * index for the buckets in the group
+        * index for the buckets in the group
         */
        offset = (FIO_IO_U_PLAT_VAL - 1) & (val >> error_bits);
 
        /* Make sure the index does not exceed (array size - 1) */
-       idx = (base + offset) < (FIO_IO_U_PLAT_NR - 1)?
+       idx = (base + offset) < (FIO_IO_U_PLAT_NR - 1) ?
                (base + offset) : (FIO_IO_U_PLAT_NR - 1);
 
        return idx;
@@ -86,11 +90,11 @@ static unsigned int plat_idx_to_val(unsigned int idx)
 
        /* MSB <= (FIO_IO_U_PLAT_BITS-1), cannot be rounded off. Use
         * all bits of the sample as index */
-       if (idx < (FIO_IO_U_PLAT_VAL << 1) )
+       if (idx < (FIO_IO_U_PLAT_VAL << 1))
                return idx;
 
        /* Find the group and compute the minimum value of that group */
-       error_bits = (idx >> FIO_IO_U_PLAT_BITS) -1;
+       error_bits = (idx >> FIO_IO_U_PLAT_BITS) - 1;
        base = 1 << (error_bits + FIO_IO_U_PLAT_BITS);
 
        /* Find its bucket number of the group */
@@ -114,11 +118,9 @@ static int double_cmp(const void *a, const void *b)
        return cmp;
 }
 
-static unsigned int calc_clat_percentiles(unsigned int *io_u_plat,
-                                         unsigned long nr, fio_fp64_t *plist,
-                                         unsigned int **output,
-                                         unsigned int *maxv,
-                                         unsigned int *minv)
+unsigned int calc_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
+                                  fio_fp64_t *plist, unsigned int **output,
+                                  unsigned int *maxv, unsigned int *minv)
 {
        unsigned long sum = 0;
        unsigned int len, i, j = 0;
@@ -142,7 +144,7 @@ static unsigned int calc_clat_percentiles(unsigned int *io_u_plat,
         * isn't a worry. Also note that this does not work for NaN values.
         */
        if (len > 1)
-               qsort((void*)plist, len, sizeof(plist[0]), double_cmp);
+               qsort((void *)plist, len, sizeof(plist[0]), double_cmp);
 
        /*
         * Calculate bucket values, note down max and min values
@@ -180,11 +182,12 @@ static unsigned int calc_clat_percentiles(unsigned int *io_u_plat,
  * Find and display the p-th percentile of clat
  */
 static void show_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
-                                 fio_fp64_t *plist)
+                                 fio_fp64_t *plist, unsigned int precision)
 {
        unsigned int len, j = 0, minv, maxv;
        unsigned int *ovals;
-       int is_last, scale_down;
+       int is_last, per_line, scale_down;
+       char fmt[32];
 
        len = calc_clat_percentiles(io_u_plat, nr, plist, &ovals, &maxv, &minv);
        if (!len)
@@ -202,20 +205,23 @@ static void show_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
                log_info("    clat percentiles (usec):\n     |");
        }
 
+       snprintf(fmt, sizeof(fmt), "%%1.%uf", precision);
+       per_line = (80 - 7) / (precision + 14);
+
        for (j = 0; j < len; j++) {
-               char fbuf[8];
+               char fbuf[16], *ptr = fbuf;
 
                /* for formatting */
-               if (j != 0 && (j % 4) == 0)
+               if (j != 0 && (j % per_line) == 0)
                        log_info("     |");
 
                /* end of the list */
                is_last = (j == len - 1);
 
                if (plist[j].u.f < 10.0)
-                       sprintf(fbuf, " %2.2f", plist[j].u.f);
-               else
-                       sprintf(fbuf, "%2.2f", plist[j].u.f);
+                       ptr += sprintf(fbuf, " ");
+
+               snprintf(ptr, sizeof(fbuf), fmt, plist[j].u.f);
 
                if (scale_down)
                        ovals[j] = (ovals[j] + 999) / 1000;
@@ -225,7 +231,7 @@ static void show_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
                if (is_last)
                        break;
 
-               if (j % 4 == 3) /* for formatting */
+               if ((j % per_line) == per_line - 1)     /* for formatting */
                        log_info("\n");
        }
 
@@ -234,18 +240,16 @@ out:
                free(ovals);
 }
 
-static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
-                   double *mean, double *dev)
+int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
+            double *mean, double *dev)
 {
-       double n = is->samples;
+       double n = (double) is->samples;
 
-       if (is->samples == 0)
+       if (n == 0)
                return 0;
 
        *min = is->min_val;
        *max = is->max_val;
-
-       n = (double) is->samples;
        *mean = is->mean.u.f;
 
        if (n > 1.0)
@@ -259,26 +263,28 @@ static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 void show_group_stats(struct group_run_stats *rs)
 {
        char *p1, *p2, *p3, *p4;
-       const char *ddir_str[] = { "   READ", "  WRITE" };
+       const char *ddir_str[] = { "   READ", "  WRITE" , "   TRIM"};
        int i;
 
        log_info("\nRun status group %d (all jobs):\n", rs->groupid);
 
-       for (i = 0; i <= DDIR_WRITE; i++) {
+       for (i = 0; i < DDIR_RWDIR_CNT; i++) {
                const int i2p = is_power_of_2(rs->kb_base);
 
                if (!rs->max_run[i])
                        continue;
 
-               p1 = num2str(rs->io_kb[i], 6, rs->kb_base, i2p);
-               p2 = num2str(rs->agg[i], 6, rs->kb_base, i2p);
-               p3 = num2str(rs->min_bw[i], 6, rs->kb_base, i2p);
-               p4 = num2str(rs->max_bw[i], 6, rs->kb_base, i2p);
+               p1 = num2str(rs->io_kb[i], 6, rs->kb_base, i2p, 8);
+               p2 = num2str(rs->agg[i], 6, rs->kb_base, i2p, rs->unit_base);
+               p3 = num2str(rs->min_bw[i], 6, rs->kb_base, i2p, rs->unit_base);
+               p4 = num2str(rs->max_bw[i], 6, rs->kb_base, i2p, rs->unit_base);
 
-               log_info("%s: io=%sB, aggrb=%sB/s, minb=%sB/s, maxb=%sB/s,"
-                        " mint=%llumsec, maxt=%llumsec\n", ddir_str[i], p1, p2,
-                                               p3, p4, rs->min_run[i],
-                                               rs->max_run[i]);
+               log_info("%s: io=%s, aggrb=%s/s, minb=%s/s, maxb=%s/s,"
+                        " mint=%llumsec, maxt=%llumsec\n",
+                               rs->unified_rw_rep ? "  MIXED" : ddir_str[i],
+                               p1, p2, p3, p4,
+                               (unsigned long long) rs->min_run[i],
+                               (unsigned long long) rs->max_run[i]);
 
                free(p1);
                free(p2);
@@ -287,11 +293,7 @@ void show_group_stats(struct group_run_stats *rs)
        }
 }
 
-#define ts_total_io_u(ts)      \
-       ((ts)->total_io_u[0] + (ts)->total_io_u[1])
-
-static void stat_calc_dist(unsigned int *map, unsigned long total,
-                          double *io_u_dist)
+void stat_calc_dist(unsigned int *map, unsigned long total, double *io_u_dist)
 {
        int i;
 
@@ -312,7 +314,7 @@ static void stat_calc_dist(unsigned int *map, unsigned long total,
 static void stat_calc_lat(struct thread_stat *ts, double *dst,
                          unsigned int *src, int nr)
 {
-       unsigned long total = ts_total_io_u(ts);
+       unsigned long total = ddir_rw_sum(ts->total_io_u);
        int i;
 
        /*
@@ -329,34 +331,39 @@ static void stat_calc_lat(struct thread_stat *ts, double *dst,
        }
 }
 
-static void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
+void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
 {
        stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
 }
 
-static void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
+void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
 {
        stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
 }
 
-static int usec_to_msec(unsigned long *min, unsigned long *max, double *mean,
-                       double *dev)
+static void display_lat(const char *name, unsigned long min, unsigned long max,
+                       double mean, double dev)
 {
-       if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
-               *min /= 1000;
-               *max /= 1000;
-               *mean /= 1000.0;
-               *dev /= 1000.0;
-               return 0;
-       }
+       const char *base = "(usec)";
+       char *minp, *maxp;
 
-       return 1;
+       if (!usec_to_msec(&min, &max, &mean, &dev))
+               base = "(msec)";
+
+       minp = num2str(min, 6, 1, 0, 0);
+       maxp = num2str(max, 6, 1, 0, 0);
+
+       log_info("    %s %s: min=%s, max=%s, avg=%5.02f,"
+                " stdev=%5.02f\n", name, base, minp, maxp, mean, dev);
+
+       free(minp);
+       free(maxp);
 }
 
 static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
                             int ddir)
 {
-       const char *ddir_str[] = { "read ", "write" };
+       const char *ddir_str[] = { "read ", "write", "trim" };
        unsigned long min, max, runt;
        unsigned long long bw, iops;
        double mean, dev;
@@ -372,76 +379,44 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
        runt = ts->runtime[ddir];
 
        bw = (1000 * ts->io_bytes[ddir]) / runt;
-       io_p = num2str(ts->io_bytes[ddir], 6, 1, i2p);
-       bw_p = num2str(bw, 6, 1, i2p);
+       io_p = num2str(ts->io_bytes[ddir], 6, 1, i2p, 8);
+       bw_p = num2str(bw, 6, 1, i2p, ts->unit_base);
 
        iops = (1000 * (uint64_t)ts->total_io_u[ddir]) / runt;
-       iops_p = num2str(iops, 6, 1, 0);
+       iops_p = num2str(iops, 6, 1, 0, 0);
 
-       log_info("  %s: io=%sB, bw=%sB/s, iops=%s, runt=%6llumsec\n",
-                                       ddir_str[ddir], io_p, bw_p, iops_p,
-                                       ts->runtime[ddir]);
+       log_info("  %s: io=%s, bw=%s/s, iops=%s, runt=%6llumsec\n",
+                               rs->unified_rw_rep ? "mixed" : ddir_str[ddir],
+                               io_p, bw_p, iops_p,
+                               (unsigned long long) ts->runtime[ddir]);
 
        free(io_p);
        free(bw_p);
        free(iops_p);
 
-       if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
-               const char *base = "(usec)";
-               char *minp, *maxp;
-
-               if (!usec_to_msec(&min, &max, &mean, &dev))
-                       base = "(msec)";
-
-               minp = num2str(min, 6, 1, 0);
-               maxp = num2str(max, 6, 1, 0);
-
-               log_info("    slat %s: min=%s, max=%s, avg=%5.02f,"
-                        " stdev=%5.02f\n", base, minp, maxp, mean, dev);
-
-               free(minp);
-               free(maxp);
-       }
-       if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
-               const char *base = "(usec)";
-               char *minp, *maxp;
-
-               if (!usec_to_msec(&min, &max, &mean, &dev))
-                       base = "(msec)";
-
-               minp = num2str(min, 6, 1, 0);
-               maxp = num2str(max, 6, 1, 0);
-
-               log_info("    clat %s: min=%s, max=%s, avg=%5.02f,"
-                        " stdev=%5.02f\n", base, minp, maxp, mean, dev);
-
-               free(minp);
-               free(maxp);
-       }
-       if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev)) {
-               const char *base = "(usec)";
-               char *minp, *maxp;
-
-               if (!usec_to_msec(&min, &max, &mean, &dev))
-                       base = "(msec)";
-
-               minp = num2str(min, 6, 1, 0);
-               maxp = num2str(max, 6, 1, 0);
-
-               log_info("     lat %s: min=%s, max=%s, avg=%5.02f,"
-                        " stdev=%5.02f\n", base, minp, maxp, mean, dev);
+       if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
+               display_lat("slat", min, max, mean, dev);
+       if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
+               display_lat("clat", min, max, mean, dev);
+       if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
+               display_lat(" lat", min, max, mean, dev);
 
-               free(minp);
-               free(maxp);
-       }
        if (ts->clat_percentiles) {
                show_clat_percentiles(ts->io_u_plat[ddir],
                                        ts->clat_stat[ddir].samples,
-                                       ts->percentile_list);
+                                       ts->percentile_list,
+                                       ts->percentile_precision);
        }
        if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
-               double p_of_agg = 100.0;
-               const char *bw_str = "KB";
+               double p_of_agg = 100.0, fkb_base = (double)rs->kb_base;
+               const char *bw_str = (rs->unit_base == 1 ? "Kbit" : "KB");
+
+               if (rs->unit_base == 1) {
+                       min *= 8.0;
+                       max *= 8.0;
+                       mean *= 8.0;
+                       dev *= 8.0;
+               }
 
                if (rs->agg[ddir]) {
                        p_of_agg = mean * 100 / (double) rs->agg[ddir];
@@ -449,15 +424,15 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
                                p_of_agg = 100.0;
                }
 
-               if (mean > 999999.9) {
-                       min /= 1000.0;
-                       max /= 1000.0;
-                       mean /= 1000.0;
-                       dev /= 1000.0;
-                       bw_str = "MB";
+               if (mean > fkb_base * fkb_base) {
+                       min /= fkb_base;
+                       max /= fkb_base;
+                       mean /= fkb_base;
+                       dev /= fkb_base;
+                       bw_str = (rs->unit_base == 1 ? "Mbit" : "MB");
                }
 
-               log_info("    bw (%s/s)  : min=%5lu, max=%5lu, per=%3.2f%%,"
+               log_info("    bw (%-4s/s): min=%5lu, max=%5lu, per=%3.2f%%,"
                         " avg=%5.02f, stdev=%5.02f\n", bw_str, min, max,
                                                        p_of_agg, mean, dev);
        }
@@ -510,32 +485,42 @@ static void show_lat_m(double *io_u_lat_m)
        show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
 }
 
-static void show_latencies(double *io_u_lat_u, double *io_u_lat_m)
+static void show_latencies(struct thread_stat *ts)
 {
+       double io_u_lat_u[FIO_IO_U_LAT_U_NR];
+       double io_u_lat_m[FIO_IO_U_LAT_M_NR];
+
+       stat_calc_lat_u(ts, io_u_lat_u);
+       stat_calc_lat_m(ts, io_u_lat_m);
+
        show_lat_u(io_u_lat_u);
        show_lat_m(io_u_lat_m);
 }
 
-void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs)
+static void show_thread_status_normal(struct thread_stat *ts,
+                                     struct group_run_stats *rs)
 {
        double usr_cpu, sys_cpu;
        unsigned long runtime;
        double io_u_dist[FIO_IO_U_MAP_NR];
-       double io_u_lat_u[FIO_IO_U_LAT_U_NR];
-       double io_u_lat_m[FIO_IO_U_LAT_M_NR];
+       time_t time_p;
+       char time_buf[64];
 
-       if (!(ts->io_bytes[0] + ts->io_bytes[1]) &&
-           !(ts->total_io_u[0] + ts->total_io_u[1]))
+       if (!ddir_rw_sum(ts->io_bytes) && !ddir_rw_sum(ts->total_io_u))
                return;
 
+       time(&time_p);
+       os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
+
        if (!ts->error) {
-               log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n",
+               log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d: %s",
                                        ts->name, ts->groupid, ts->members,
-                                       ts->error, (int) ts->pid);
+                                       ts->error, (int) ts->pid, time_buf);
        } else {
-               log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d\n",
+               log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d: %s",
                                        ts->name, ts->groupid, ts->members,
-                                       ts->error, ts->verror, (int) ts->pid);
+                                       ts->error, ts->verror, (int) ts->pid,
+                                       time_buf);
        }
 
        if (strlen(ts->description))
@@ -545,10 +530,10 @@ void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs)
                show_ddir_status(rs, ts, DDIR_READ);
        if (ts->io_bytes[DDIR_WRITE])
                show_ddir_status(rs, ts, DDIR_WRITE);
+       if (ts->io_bytes[DDIR_TRIM])
+               show_ddir_status(rs, ts, DDIR_TRIM);
 
-       stat_calc_lat_u(ts, io_u_lat_u);
-       stat_calc_lat_m(ts, io_u_lat_m);
-       show_latencies(io_u_lat_u, io_u_lat_m);
+       show_latencies(ts);
 
        runtime = ts->total_run_time;
        if (runtime) {
@@ -561,10 +546,13 @@ void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs)
                sys_cpu = 0;
        }
 
-       log_info("  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu, majf=%lu,"
-                " minf=%lu\n", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);
+       log_info("  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%llu,"
+                " majf=%llu, minf=%llu\n", usr_cpu, sys_cpu,
+                       (unsigned long long) ts->ctx,
+                       (unsigned long long) ts->majf,
+                       (unsigned long long) ts->minf);
 
-       stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
+       stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
        log_info("  IO depths    : 1=%3.1f%%, 2=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%,"
                 " 16=%3.1f%%, 32=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
                                        io_u_dist[1], io_u_dist[2],
@@ -583,18 +571,31 @@ void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs)
                                        io_u_dist[1], io_u_dist[2],
                                        io_u_dist[3], io_u_dist[4],
                                        io_u_dist[5], io_u_dist[6]);
-       log_info("     issued    : total=r=%lu/w=%lu/d=%lu,"
-                                " short=r=%lu/w=%lu/d=%lu\n",
-                                       ts->total_io_u[0], ts->total_io_u[1],
-                                       ts->total_io_u[2],
-                                       ts->short_io_u[0], ts->short_io_u[1],
-                                       ts->short_io_u[2]);
+       log_info("     issued    : total=r=%llu/w=%llu/d=%llu,"
+                                " short=r=%llu/w=%llu/d=%llu,"
+                                " drop=r=%llu/w=%llu/d=%llu\n",
+                                       (unsigned long long) ts->total_io_u[0],
+                                       (unsigned long long) ts->total_io_u[1],
+                                       (unsigned long long) ts->total_io_u[2],
+                                       (unsigned long long) ts->short_io_u[0],
+                                       (unsigned long long) ts->short_io_u[1],
+                                       (unsigned long long) ts->short_io_u[2],
+                                       (unsigned long long) ts->drop_io_u[0],
+                                       (unsigned long long) ts->drop_io_u[1],
+                                       (unsigned long long) ts->drop_io_u[2]);
        if (ts->continue_on_error) {
-               log_info("     errors    : total=%lu, first_error=%d/<%s>\n",
-                                       ts->total_err_count,
+               log_info("     errors    : total=%llu, first_error=%d/<%s>\n",
+                                       (unsigned long long)ts->total_err_count,
                                        ts->first_error,
                                        strerror(ts->first_error));
        }
+       if (ts->latency_depth) {
+               log_info("     latency   : target=%llu, window=%llu, percentile=%.2f%%, depth=%u\n",
+                                       (unsigned long long)ts->latency_target,
+                                       (unsigned long long)ts->latency_window,
+                                       ts->latency_percentile.u.f,
+                                       ts->latency_depth);
+       }
 }
 
 static void show_ddir_status_terse(struct thread_stat *ts,
@@ -613,12 +614,13 @@ static void show_ddir_status_terse(struct thread_stat *ts,
        if (ts->runtime[ddir]) {
                uint64_t runt = ts->runtime[ddir];
 
-               bw = ts->io_bytes[ddir] / runt;
+               bw = ((1000 * ts->io_bytes[ddir]) / runt) / 1024;
                iops = (1000 * (uint64_t) ts->total_io_u[ddir]) / runt;
        }
 
-       log_info(";%llu;%llu;%llu;%llu", ts->io_bytes[ddir] >> 10, bw, iops,
-                                                       ts->runtime[ddir]);
+       log_info(";%llu;%llu;%llu;%llu",
+               (unsigned long long) ts->io_bytes[ddir] >> 10, bw, iops,
+                                       (unsigned long long) ts->runtime[ddir]);
 
        if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
                log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
@@ -643,7 +645,7 @@ static void show_ddir_status_terse(struct thread_stat *ts,
                        log_info(";0%%=0");
                        continue;
                }
-               log_info(";%2.2f%%=%u", ts->percentile_list[i].u.f, ovals[i]);
+               log_info(";%f%%=%u", ts->percentile_list[i].u.f, ovals[i]);
        }
 
        if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
@@ -668,8 +670,118 @@ static void show_ddir_status_terse(struct thread_stat *ts,
                log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 }
 
+static void add_ddir_status_json(struct thread_stat *ts,
+               struct group_run_stats *rs, int ddir, struct json_object *parent)
+{
+       unsigned long min, max;
+       unsigned long long bw, iops;
+       unsigned int *ovals = NULL;
+       double mean, dev;
+       unsigned int len, minv, maxv;
+       int i;
+       const char *ddirname[] = {"read", "write", "trim"};
+       struct json_object *dir_object, *tmp_object, *percentile_object;
+       char buf[120];
+       double p_of_agg = 100.0;
+
+       assert(ddir_rw(ddir));
+
+       if (ts->unified_rw_rep && ddir != DDIR_READ)
+               return;
+
+       dir_object = json_create_object();
+       json_object_add_value_object(parent,
+               ts->unified_rw_rep ? "mixed" : ddirname[ddir], dir_object);
+
+       iops = bw = 0;
+       if (ts->runtime[ddir]) {
+               uint64_t runt = ts->runtime[ddir];
+
+               bw = ((1000 * ts->io_bytes[ddir]) / runt) / 1024;
+               iops = (1000 * (uint64_t) ts->total_io_u[ddir]) / runt;
+       }
+
+       json_object_add_value_int(dir_object, "io_bytes", ts->io_bytes[ddir] >> 10);
+       json_object_add_value_int(dir_object, "bw", bw);
+       json_object_add_value_int(dir_object, "iops", iops);
+       json_object_add_value_int(dir_object, "runtime", ts->runtime[ddir]);
+       json_object_add_value_int(dir_object, "total_ios", ts->total_io_u[ddir]);
+       json_object_add_value_int(dir_object, "short_ios", ts->short_io_u[ddir]);
+       json_object_add_value_int(dir_object, "drop_ios", ts->drop_io_u[ddir]);
+
+       if (!calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
+               min = max = 0;
+               mean = dev = 0.0;
+       }
+       tmp_object = json_create_object();
+       json_object_add_value_object(dir_object, "slat", tmp_object);
+       json_object_add_value_int(tmp_object, "min", min);
+       json_object_add_value_int(tmp_object, "max", max);
+       json_object_add_value_float(tmp_object, "mean", mean);
+       json_object_add_value_float(tmp_object, "stddev", dev);
+
+       if (!calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
+               min = max = 0;
+               mean = dev = 0.0;
+       }
+       tmp_object = json_create_object();
+       json_object_add_value_object(dir_object, "clat", tmp_object);
+       json_object_add_value_int(tmp_object, "min", min);
+       json_object_add_value_int(tmp_object, "max", max);
+       json_object_add_value_float(tmp_object, "mean", mean);
+       json_object_add_value_float(tmp_object, "stddev", dev);
+
+       if (ts->clat_percentiles) {
+               len = calc_clat_percentiles(ts->io_u_plat[ddir],
+                                       ts->clat_stat[ddir].samples,
+                                       ts->percentile_list, &ovals, &maxv,
+                                       &minv);
+       } else
+               len = 0;
+
+       percentile_object = json_create_object();
+       json_object_add_value_object(tmp_object, "percentile", percentile_object);
+       for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
+               if (i >= len) {
+                       json_object_add_value_int(percentile_object, "0.00", 0);
+                       continue;
+               }
+               snprintf(buf, sizeof(buf), "%f", ts->percentile_list[i].u.f);
+               json_object_add_value_int(percentile_object, (const char *)buf, ovals[i]);
+       }
+
+       if (!calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev)) {
+               min = max = 0;
+               mean = dev = 0.0;
+       }
+       tmp_object = json_create_object();
+       json_object_add_value_object(dir_object, "lat", tmp_object);
+       json_object_add_value_int(tmp_object, "min", min);
+       json_object_add_value_int(tmp_object, "max", max);
+       json_object_add_value_float(tmp_object, "mean", mean);
+       json_object_add_value_float(tmp_object, "stddev", dev);
+       if (ovals)
+               free(ovals);
+
+       if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
+               if (rs->agg[ddir]) {
+                       p_of_agg = mean * 100 / (double) rs->agg[ddir];
+                       if (p_of_agg > 100.0)
+                               p_of_agg = 100.0;
+               }
+       } else {
+               min = max = 0;
+               p_of_agg = mean = dev = 0.0;
+       }
+       json_object_add_value_int(dir_object, "bw_min", min);
+       json_object_add_value_int(dir_object, "bw_max", max);
+       json_object_add_value_float(dir_object, "bw_agg", p_of_agg);
+       json_object_add_value_float(dir_object, "bw_mean", mean);
+       json_object_add_value_float(dir_object, "bw_dev", dev);
+}
+
 static void show_thread_status_terse_v2(struct thread_stat *ts,
-                                       struct group_run_stats *rs)
+                                       struct group_run_stats *rs)
 {
        double io_u_dist[FIO_IO_U_MAP_NR];
        double io_u_lat_u[FIO_IO_U_LAT_U_NR];
@@ -680,9 +792,11 @@ static void show_thread_status_terse_v2(struct thread_stat *ts,
        /* General Info */
        log_info("2;%s;%d;%d", ts->name, ts->groupid, ts->error);
        /* Log Read Status */
-       show_ddir_status_terse(ts, rs, 0);
+       show_ddir_status_terse(ts, rs, DDIR_READ);
        /* Log Write Status */
-       show_ddir_status_terse(ts, rs, 1);
+       show_ddir_status_terse(ts, rs, DDIR_WRITE);
+       /* Log Trim Status */
+       show_ddir_status_terse(ts, rs, DDIR_TRIM);
 
        /* CPU Usage */
        if (ts->total_run_time) {
@@ -695,11 +809,13 @@ static void show_thread_status_terse_v2(struct thread_stat *ts,
                sys_cpu = 0;
        }
 
-       log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf,
-                                                               ts->minf);
+       log_info(";%f%%;%f%%;%llu;%llu;%llu", usr_cpu, sys_cpu,
+                                               (unsigned long long) ts->ctx,
+                                               (unsigned long long) ts->majf,
+                                               (unsigned long long) ts->minf);
 
        /* Calc % distribution of IO depths, usecond, msecond latency */
-       stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
+       stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
        stat_calc_lat_u(ts, io_u_lat_u);
        stat_calc_lat_m(ts, io_u_lat_m);
 
@@ -716,20 +832,18 @@ static void show_thread_status_terse_v2(struct thread_stat *ts,
                log_info(";%3.2f%%", io_u_lat_m[i]);
        /* Additional output if continue_on_error set - default off*/
        if (ts->continue_on_error)
-               log_info(";%lu;%d", ts->total_err_count, ts->first_error);
+               log_info(";%llu;%d", (unsigned long long) ts->total_err_count, ts->first_error);
        log_info("\n");
 
        /* Additional output if description is set */
-       if (ts->description)
+       if (strlen(ts->description))
                log_info(";%s", ts->description);
 
        log_info("\n");
 }
 
-#define FIO_TERSE_VERSION      "3"
-
-static void show_thread_status_terse_v3(struct thread_stat *ts,
-                                       struct group_run_stats *rs)
+static void show_thread_status_terse_v3_v4(struct thread_stat *ts,
+                                          struct group_run_stats *rs, int ver)
 {
        double io_u_dist[FIO_IO_U_MAP_NR];
        double io_u_lat_u[FIO_IO_U_LAT_U_NR];
@@ -738,12 +852,15 @@ static void show_thread_status_terse_v3(struct thread_stat *ts,
        int i;
 
        /* General Info */
-       log_info("%s;%s;%s;%d;%d", FIO_TERSE_VERSION, fio_version_string,
+       log_info("%d;%s;%s;%d;%d", ver, fio_version_string,
                                        ts->name, ts->groupid, ts->error);
        /* Log Read Status */
-       show_ddir_status_terse(ts, rs, 0);
+       show_ddir_status_terse(ts, rs, DDIR_READ);
        /* Log Write Status */
-       show_ddir_status_terse(ts, rs, 1);
+       show_ddir_status_terse(ts, rs, DDIR_WRITE);
+       /* Log Trim Status */
+       if (ver == 4)
+               show_ddir_status_terse(ts, rs, DDIR_TRIM);
 
        /* CPU Usage */
        if (ts->total_run_time) {
@@ -756,11 +873,13 @@ static void show_thread_status_terse_v3(struct thread_stat *ts,
                sys_cpu = 0;
        }
 
-       log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf,
-                                                               ts->minf);
+       log_info(";%f%%;%f%%;%llu;%llu;%llu", usr_cpu, sys_cpu,
+                                               (unsigned long long) ts->ctx,
+                                               (unsigned long long) ts->majf,
+                                               (unsigned long long) ts->minf);
 
        /* Calc % distribution of IO depths, usecond, msecond latency */
-       stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
+       stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
        stat_calc_lat_u(ts, io_u_lat_u);
        stat_calc_lat_m(ts, io_u_lat_m);
 
@@ -777,11 +896,12 @@ static void show_thread_status_terse_v3(struct thread_stat *ts,
                log_info(";%3.2f%%", io_u_lat_m[i]);
 
        /* disk util stats, if any */
-       show_disk_util(1);
+       if (is_backend)
+               show_disk_util(1, NULL);
 
        /* Additional output if continue_on_error set - default off*/
        if (ts->continue_on_error)
-               log_info(";%lu;%d", ts->total_err_count, ts->first_error);
+               log_info(";%llu;%d", (unsigned long long) ts->total_err_count, ts->first_error);
 
        /* Additional output if description is set */
        if (strlen(ts->description))
@@ -790,17 +910,120 @@ static void show_thread_status_terse_v3(struct thread_stat *ts,
        log_info("\n");
 }
 
+static struct json_object *show_thread_status_json(struct thread_stat *ts,
+                                   struct group_run_stats *rs)
+{
+       struct json_object *root, *tmp;
+       double io_u_dist[FIO_IO_U_MAP_NR];
+       double io_u_lat_u[FIO_IO_U_LAT_U_NR];
+       double io_u_lat_m[FIO_IO_U_LAT_M_NR];
+       double usr_cpu, sys_cpu;
+       int i;
+
+       root = json_create_object();
+       json_object_add_value_string(root, "jobname", ts->name);
+       json_object_add_value_int(root, "groupid", ts->groupid);
+       json_object_add_value_int(root, "error", ts->error);
+
+       add_ddir_status_json(ts, rs, DDIR_READ, root);
+       add_ddir_status_json(ts, rs, DDIR_WRITE, root);
+       add_ddir_status_json(ts, rs, DDIR_TRIM, root);
+
+       /* CPU Usage */
+       if (ts->total_run_time) {
+               double runt = (double) ts->total_run_time;
+
+               usr_cpu = (double) ts->usr_time * 100 / runt;
+               sys_cpu = (double) ts->sys_time * 100 / runt;
+       } else {
+               usr_cpu = 0;
+               sys_cpu = 0;
+       }
+       json_object_add_value_float(root, "usr_cpu", usr_cpu);
+       json_object_add_value_float(root, "sys_cpu", sys_cpu);
+       json_object_add_value_int(root, "ctx", ts->ctx);
+       json_object_add_value_int(root, "majf", ts->majf);
+       json_object_add_value_int(root, "minf", ts->minf);
+
+
+       /* Calc % distribution of IO depths, usecond, msecond latency */
+       stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
+       stat_calc_lat_u(ts, io_u_lat_u);
+       stat_calc_lat_m(ts, io_u_lat_m);
+
+       tmp = json_create_object();
+       json_object_add_value_object(root, "iodepth_level", tmp);
+       /* Only show fixed 7 I/O depth levels*/
+       for (i = 0; i < 7; i++) {
+               char name[20];
+               if (i < 6)
+                       snprintf(name, 20, "%d", 1 << i);
+               else
+                       snprintf(name, 20, ">=%d", 1 << i);
+               json_object_add_value_float(tmp, (const char *)name, io_u_dist[i]);
+       }
+
+       tmp = json_create_object();
+       json_object_add_value_object(root, "latency_us", tmp);
+       /* Microsecond latency */
+       for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
+               const char *ranges[] = { "2", "4", "10", "20", "50", "100",
+                                "250", "500", "750", "1000", };
+               json_object_add_value_float(tmp, ranges[i], io_u_lat_u[i]);
+       }
+       /* Millisecond latency */
+       tmp = json_create_object();
+       json_object_add_value_object(root, "latency_ms", tmp);
+       for (i = 0; i < FIO_IO_U_LAT_M_NR; i++) {
+               const char *ranges[] = { "2", "4", "10", "20", "50", "100",
+                                "250", "500", "750", "1000", "2000",
+                                ">=2000", };
+               json_object_add_value_float(tmp, ranges[i], io_u_lat_m[i]);
+       }
+
+       /* Additional output if continue_on_error set - default off*/
+       if (ts->continue_on_error) {
+               json_object_add_value_int(root, "total_err", ts->total_err_count);
+               json_object_add_value_int(root, "first_error", ts->first_error);
+       }
+
+       if (ts->latency_depth) {
+               json_object_add_value_int(root, "latency_depth", ts->latency_depth);
+               json_object_add_value_int(root, "latency_target", ts->latency_target);
+               json_object_add_value_float(root, "latency_percentile", ts->latency_percentile.u.f);
+               json_object_add_value_int(root, "latency_window", ts->latency_window);
+       }
+
+       /* Additional output if description is set */
+       if (strlen(ts->description))
+               json_object_add_value_string(root, "desc", ts->description);
+
+       return root;
+}
+
 static void show_thread_status_terse(struct thread_stat *ts,
                                     struct group_run_stats *rs)
 {
        if (terse_version == 2)
                show_thread_status_terse_v2(ts, rs);
-       else if (terse_version == 3)
-               show_thread_status_terse_v3(ts, rs);
+       else if (terse_version == 3 || terse_version == 4)
+               show_thread_status_terse_v3_v4(ts, rs, terse_version);
        else
                log_err("fio: bad terse version!? %d\n", terse_version);
 }
 
+struct json_object *show_thread_status(struct thread_stat *ts,
+                                      struct group_run_stats *rs)
+{
+       if (output_format == FIO_OUTPUT_TERSE)
+               show_thread_status_terse(ts, rs);
+       else if (output_format == FIO_OUTPUT_JSON)
+               return show_thread_status_json(ts, rs);
+       else
+               show_thread_status_normal(ts, rs);
+       return NULL;
+}
+
 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
 {
        double mean, S;
@@ -840,7 +1063,7 @@ void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src)
 {
        int i;
 
-       for (i = 0; i < 2; i++) {
+       for (i = 0; i < DDIR_RWDIR_CNT; i++) {
                if (dst->max_run[i] < src->max_run[i])
                        dst->max_run[i] = src->max_run[i];
                if (dst->min_run[i] && dst->min_run[i] > src->min_run[i])
@@ -854,22 +1077,38 @@ void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src)
                dst->agg[i] += src->agg[i];
        }
 
+       if (!dst->kb_base)
+               dst->kb_base = src->kb_base;
+       if (!dst->unit_base)
+               dst->unit_base = src->unit_base;
 }
 
 void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr)
 {
        int l, k;
 
-       for (l = 0; l <= DDIR_WRITE; l++) {
-               sum_stat(&dst->clat_stat[l], &src->clat_stat[l], nr);
-               sum_stat(&dst->slat_stat[l], &src->slat_stat[l], nr);
-               sum_stat(&dst->lat_stat[l], &src->lat_stat[l], nr);
-               sum_stat(&dst->bw_stat[l], &src->bw_stat[l], nr);
+       for (l = 0; l < DDIR_RWDIR_CNT; l++) {
+               if (!dst->unified_rw_rep) {
+                       sum_stat(&dst->clat_stat[l], &src->clat_stat[l], nr);
+                       sum_stat(&dst->slat_stat[l], &src->slat_stat[l], nr);
+                       sum_stat(&dst->lat_stat[l], &src->lat_stat[l], nr);
+                       sum_stat(&dst->bw_stat[l], &src->bw_stat[l], nr);
+
+                       dst->io_bytes[l] += src->io_bytes[l];
 
-               dst->io_bytes[l] += src->io_bytes[l];
+                       if (dst->runtime[l] < src->runtime[l])
+                               dst->runtime[l] = src->runtime[l];
+               } else {
+                       sum_stat(&dst->clat_stat[0], &src->clat_stat[l], nr);
+                       sum_stat(&dst->slat_stat[0], &src->slat_stat[l], nr);
+                       sum_stat(&dst->lat_stat[0], &src->lat_stat[l], nr);
+                       sum_stat(&dst->bw_stat[0], &src->bw_stat[l], nr);
 
-               if (dst->runtime[l] < src->runtime[l])
-                       dst->runtime[l] = src->runtime[l];
+                       dst->io_bytes[0] += src->io_bytes[l];
+
+                       if (dst->runtime[0] < src->runtime[l])
+                               dst->runtime[0] = src->runtime[l];
+               }
        }
 
        dst->usr_time += src->usr_time;
@@ -889,15 +1128,27 @@ void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr)
        for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
                dst->io_u_lat_m[k] += src->io_u_lat_m[k];
 
-       for (k = 0; k <= 2; k++) {
-               dst->total_io_u[k] += src->total_io_u[k];
-               dst->short_io_u[k] += src->short_io_u[k];
+       for (k = 0; k < DDIR_RWDIR_CNT; k++) {
+               if (!dst->unified_rw_rep) {
+                       dst->total_io_u[k] += src->total_io_u[k];
+                       dst->short_io_u[k] += src->short_io_u[k];
+                       dst->drop_io_u[k] += src->drop_io_u[k];
+               } else {
+                       dst->total_io_u[0] += src->total_io_u[k];
+                       dst->short_io_u[0] += src->short_io_u[k];
+                       dst->drop_io_u[0] += src->drop_io_u[k];
+               }
        }
 
-       for (k = 0; k <= DDIR_WRITE; k++) {
+       for (k = 0; k < DDIR_RWDIR_CNT; k++) {
                int m;
-               for (m = 0; m < FIO_IO_U_PLAT_NR; m++)
-                       dst->io_u_plat[k][m] += src->io_u_plat[k][m];
+
+               for (m = 0; m < FIO_IO_U_PLAT_NR; m++) {
+                       if (!dst->unified_rw_rep)
+                               dst->io_u_plat[k][m] += src->io_u_plat[k][m];
+                       else
+                               dst->io_u_plat[0][m] += src->io_u_plat[k][m];
+               }
        }
 
        dst->total_run_time += src->total_run_time;
@@ -907,9 +1158,11 @@ void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr)
 
 void init_group_run_stat(struct group_run_stats *gs)
 {
+       int i;
        memset(gs, 0, sizeof(*gs));
-       gs->min_bw[0] = gs->min_run[0] = ~0UL;
-       gs->min_bw[1] = gs->min_run[1] = ~0UL;
+
+       for (i = 0; i < DDIR_RWDIR_CNT; i++)
+               gs->min_bw[i] = gs->min_run[i] = ~0UL;
 }
 
 void init_thread_stat(struct thread_stat *ts)
@@ -918,7 +1171,7 @@ void init_thread_stat(struct thread_stat *ts)
 
        memset(ts, 0, sizeof(*ts));
 
-       for (j = 0; j <= DDIR_WRITE; j++) {
+       for (j = 0; j < DDIR_RWDIR_CNT; j++) {
                ts->lat_stat[j].min_val = -1UL;
                ts->clat_stat[j].min_val = -1UL;
                ts->slat_stat[j].min_val = -1UL;
@@ -927,13 +1180,16 @@ void init_thread_stat(struct thread_stat *ts)
        ts->groupid = -1;
 }
 
-void show_run_stats(void)
+void __show_run_stats(void)
 {
        struct group_run_stats *runstats, *rs;
        struct thread_data *td;
        struct thread_stat *threadstats, *ts;
        int i, j, nr_ts, last_ts, idx;
        int kb_base_warned = 0;
+       int unit_base_warned = 0;
+       struct json_object *root = NULL;
+       struct json_array *array = NULL;
 
        runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 
@@ -978,10 +1234,8 @@ void show_run_stats(void)
                ts = &threadstats[j];
 
                ts->clat_percentiles = td->o.clat_percentiles;
-               if (td->o.overwrite_plist)
-                       memcpy(ts->percentile_list, td->o.percentile_list, sizeof(td->o.percentile_list));
-               else
-                       memcpy(ts->percentile_list, def_percentile_list, sizeof(def_percentile_list));
+               ts->percentile_precision = td->o.percentile_precision;
+               memcpy(ts->percentile_list, td->o.percentile_list, sizeof(td->o.percentile_list));
 
                idx++;
                ts->members++;
@@ -990,13 +1244,18 @@ void show_run_stats(void)
                        /*
                         * These are per-group shared already
                         */
-                       strncpy(ts->name, td->o.name, FIO_JOBNAME_SIZE);
+                       strncpy(ts->name, td->o.name, FIO_JOBNAME_SIZE - 1);
                        if (td->o.description)
                                strncpy(ts->description, td->o.description,
-                                               FIO_JOBNAME_SIZE);
+                                               FIO_JOBDESC_SIZE - 1);
                        else
-                               memset(ts->description, 0, FIO_JOBNAME_SIZE);
+                               memset(ts->description, 0, FIO_JOBDESC_SIZE);
 
+                       /*
+                        * If multiple entries in this group, this is
+                        * the first member.
+                        */
+                       ts->thread_number = td->thread_number;
                        ts->groupid = td->groupid;
 
                        /*
@@ -1005,10 +1264,16 @@ void show_run_stats(void)
                        ts->pid = td->pid;
 
                        ts->kb_base = td->o.kb_base;
+                       ts->unit_base = td->o.unit_base;
+                       ts->unified_rw_rep = td->o.unified_rw_rep;
                } else if (ts->kb_base != td->o.kb_base && !kb_base_warned) {
                        log_info("fio: kb_base differs for jobs in group, using"
                                 " %u as the base\n", ts->kb_base);
                        kb_base_warned = 1;
+               } else if (ts->unit_base != td->o.unit_base && !unit_base_warned) {
+                       log_info("fio: unit_base differs for jobs in group, using"
+                                " %u as the base\n", ts->unit_base);
+                       unit_base_warned = 1;
                }
 
                ts->continue_on_error = td->o.continue_on_error;
@@ -1018,13 +1283,20 @@ void show_run_stats(void)
                        if (!td->error && td->o.continue_on_error &&
                            td->first_error) {
                                ts->error = td->first_error;
-                               strcpy(ts->verror, td->verror);
+                               ts->verror[sizeof(ts->verror) - 1] = '\0';
+                               strncpy(ts->verror, td->verror, sizeof(ts->verror) - 1);
                        } else  if (td->error) {
                                ts->error = td->error;
-                               strcpy(ts->verror, td->verror);
+                               ts->verror[sizeof(ts->verror) - 1] = '\0';
+                               strncpy(ts->verror, td->verror, sizeof(ts->verror) - 1);
                        }
                }
 
+               ts->latency_depth = td->latency_qd;
+               ts->latency_target = td->o.latency_target;
+               ts->latency_percentile = td->o.latency_percentile;
+               ts->latency_window = td->o.latency_window;
+
                sum_thread_stats(ts, &td->ts, idx);
        }
 
@@ -1034,8 +1306,10 @@ void show_run_stats(void)
                ts = &threadstats[i];
                rs = &runstats[ts->groupid];
                rs->kb_base = ts->kb_base;
+               rs->unit_base = ts->unit_base;
+               rs->unified_rw_rep += ts->unified_rw_rep;
 
-               for (j = 0; j <= DDIR_WRITE; j++) {
+               for (j = 0; j < DDIR_RWDIR_CNT; j++) {
                        if (!ts->runtime[j])
                                continue;
                        if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
@@ -1061,19 +1335,28 @@ void show_run_stats(void)
        }
 
        for (i = 0; i < groupid + 1; i++) {
+               int ddir;
+
                rs = &runstats[i];
 
-               if (rs->max_run[0])
-                       rs->agg[0] = (rs->io_kb[0] * 1000) / rs->max_run[0];
-               if (rs->max_run[1])
-                       rs->agg[1] = (rs->io_kb[1] * 1000) / rs->max_run[1];
+               for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
+                       if (rs->max_run[ddir])
+                               rs->agg[ddir] = (rs->io_kb[ddir] * 1000) /
+                                               rs->max_run[ddir];
+               }
        }
 
        /*
         * don't overwrite last signal output
         */
-       if (!terse_output)
+       if (output_format == FIO_OUTPUT_NORMAL)
                log_info("\n");
+       else if (output_format == FIO_OUTPUT_JSON) {
+               root = json_create_object();
+               json_object_add_value_string(root, "fio version", fio_version_string);
+               array = json_create_array();
+               json_object_add_value_array(root, "jobs", array);
+       }
 
        for (i = 0; i < nr_ts; i++) {
                ts = &threadstats[i];
@@ -1081,10 +1364,23 @@ void show_run_stats(void)
 
                if (is_backend)
                        fio_server_send_ts(ts, rs);
-               else if (terse_output)
+               else if (output_format == FIO_OUTPUT_TERSE)
                        show_thread_status_terse(ts, rs);
-               else
-                       show_thread_status(ts, rs);
+               else if (output_format == FIO_OUTPUT_JSON) {
+                       struct json_object *tmp = show_thread_status_json(ts, rs);
+                       json_array_add_value_object(array, tmp);
+               } else
+                       show_thread_status_normal(ts, rs);
+       }
+       if (output_format == FIO_OUTPUT_JSON) {
+               /* disk util stats, if any */
+               show_disk_util(1, root);
+
+               show_idle_prof_stats(FIO_OUTPUT_JSON, root);
+
+               json_print_object(root);
+               log_info("\n");
+               json_free_object(root);
        }
 
        for (i = 0; i < groupid + 1; i++) {
@@ -1093,26 +1389,48 @@ void show_run_stats(void)
                rs->groupid = i;
                if (is_backend)
                        fio_server_send_gs(rs);
-               else if (!terse_output)
+               else if (output_format == FIO_OUTPUT_NORMAL)
                        show_group_stats(rs);
        }
 
        if (is_backend)
                fio_server_send_du();
-       else if (!terse_output)
-               show_disk_util(0);
+       else if (output_format == FIO_OUTPUT_NORMAL) {
+               show_disk_util(0, NULL);
+               show_idle_prof_stats(FIO_OUTPUT_NORMAL, NULL);
+       }
+
+       if ( !(output_format == FIO_OUTPUT_TERSE) && append_terse_output) {
+               log_info("\nAdditional Terse Output:\n");
+
+               for (i = 0; i < nr_ts; i++) {
+                       ts = &threadstats[i];
+                       rs = &runstats[ts->groupid];
+                       show_thread_status_terse(ts, rs);
+               }
+       }
 
+       log_info_flush();
        free(runstats);
        free(threadstats);
 }
 
-static void *__show_running_run_stats(void *arg)
+void show_run_stats(void)
+{
+       fio_mutex_down(stat_mutex);
+       __show_run_stats();
+       fio_mutex_up(stat_mutex);
+}
+
+static void __show_running_run_stats(void)
 {
        struct thread_data *td;
        unsigned long long *rt;
        struct timeval tv;
        int i;
 
+       fio_mutex_down(stat_mutex);
+
        rt = malloc(thread_number * sizeof(unsigned long long));
        fio_gettime(&tv, NULL);
 
@@ -1122,37 +1440,96 @@ static void *__show_running_run_stats(void *arg)
                        td->ts.runtime[DDIR_READ] += rt[i];
                if (td_write(td) && td->io_bytes[DDIR_WRITE])
                        td->ts.runtime[DDIR_WRITE] += rt[i];
+               if (td_trim(td) && td->io_bytes[DDIR_TRIM])
+                       td->ts.runtime[DDIR_TRIM] += rt[i];
 
-               update_rusage_stat(td);
-               td->ts.io_bytes[0] = td->io_bytes[0];
-               td->ts.io_bytes[1] = td->io_bytes[1];
+               td->update_rusage = 1;
+               td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
+               td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
+               td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
                td->ts.total_run_time = mtime_since(&td->epoch, &tv);
        }
 
-       show_run_stats();
+       for_each_td(td, i) {
+               if (td->runstate >= TD_EXITED)
+                       continue;
+               if (td->rusage_sem) {
+                       td->update_rusage = 1;
+                       fio_mutex_down(td->rusage_sem);
+               }
+               td->update_rusage = 0;
+       }
+
+       __show_run_stats();
 
        for_each_td(td, i) {
                if (td_read(td) && td->io_bytes[DDIR_READ])
                        td->ts.runtime[DDIR_READ] -= rt[i];
                if (td_write(td) && td->io_bytes[DDIR_WRITE])
                        td->ts.runtime[DDIR_WRITE] -= rt[i];
+               if (td_trim(td) && td->io_bytes[DDIR_TRIM])
+                       td->ts.runtime[DDIR_TRIM] -= rt[i];
        }
 
        free(rt);
-       return NULL;
+       fio_mutex_up(stat_mutex);
 }
 
-/*
- * Called from signal handler. It _should_ be safe to just run this inline
- * in the sig handler, but we should be disturbing the system less by just
- * creating a thread to do it.
- */
-void show_running_run_stats(void)
+static int status_interval_init;
+static struct timeval status_time;
+static int status_file_disabled;
+
+#define FIO_STATUS_FILE                "fio-dump-status"
+
+static int check_status_file(void)
 {
-       pthread_t thread;
+       struct stat sb;
+       const char *temp_dir;
+       char fio_status_file_path[PATH_MAX];
+
+       if (status_file_disabled)
+               return 0;
+
+       temp_dir = getenv("TMPDIR");
+       if (temp_dir == NULL) {
+               temp_dir = getenv("TEMP");
+               if (temp_dir && strlen(temp_dir) >= PATH_MAX)
+                       temp_dir = NULL;
+       }
+       if (temp_dir == NULL)
+               temp_dir = "/tmp";
+
+       snprintf(fio_status_file_path, sizeof(fio_status_file_path), "%s/%s", temp_dir, FIO_STATUS_FILE);
+
+       if (stat(fio_status_file_path, &sb))
+               return 0;
 
-       pthread_create(&thread, NULL, __show_running_run_stats, NULL);
-       pthread_detach(thread);
+       if (unlink(fio_status_file_path) < 0) {
+               log_err("fio: failed to unlink %s: %s\n", fio_status_file_path,
+                                                       strerror(errno));
+               log_err("fio: disabling status file updates\n");
+               status_file_disabled = 1;
+       }
+
+       return 1;
+}
+
+void check_for_running_stats(void)
+{
+       if (status_interval) {
+               if (!status_interval_init) {
+                       fio_gettime(&status_time, NULL);
+                       status_interval_init = 1;
+               } else if (mtime_since_now(&status_time) >= status_interval) {
+                       show_running_run_stats();
+                       fio_gettime(&status_time, NULL);
+                       return;
+               }
+       }
+       if (check_status_file()) {
+               show_running_run_stats();
+               return;
+       }
 }
 
 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
@@ -1176,24 +1553,55 @@ static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 
 static void __add_log_sample(struct io_log *iolog, unsigned long val,
                             enum fio_ddir ddir, unsigned int bs,
-                            unsigned long t)
+                            unsigned long t, uint64_t offset)
 {
-       const int nr_samples = iolog->nr_samples;
+       uint64_t nr_samples = iolog->nr_samples;
+       struct io_sample *s;
+
+       if (iolog->disabled)
+               return;
 
        if (!iolog->nr_samples)
                iolog->avg_last = t;
 
        if (iolog->nr_samples == iolog->max_samples) {
-               int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
+               size_t new_size;
+               void *new_log;
+
+               new_size = 2 * iolog->max_samples * log_entry_sz(iolog);
+
+               if (iolog->log_gz && (new_size > iolog->log_gz)) {
+                       if (iolog_flush(iolog, 0)) {
+                               log_err("fio: failed flushing iolog! Will stop logging.\n");
+                               iolog->disabled = 1;
+                               return;
+                       }
+                       nr_samples = iolog->nr_samples;
+               } else {
+                       new_log = realloc(iolog->log, new_size);
+                       if (!new_log) {
+                               log_err("fio: failed extending iolog! Will stop logging.\n");
+                               iolog->disabled = 1;
+                               return;
+                       }
+                       iolog->log = new_log;
+                       iolog->max_samples <<= 1;
+               }
+       }
+
+       s = get_sample(iolog, nr_samples);
+
+       s->val = val;
+       s->time = t;
+       io_sample_set_ddir(iolog, s, ddir);
+       s->bs = bs;
 
-               iolog->log = realloc(iolog->log, new_size);
-               iolog->max_samples <<= 1;
+       if (iolog->log_offset) {
+               struct io_sample_offset *so = (void *) s;
+
+               so->offset = offset;
        }
 
-       iolog->log[nr_samples].val = val;
-       iolog->log[nr_samples].time = t;
-       iolog->log[nr_samples].ddir = ddir;
-       iolog->log[nr_samples].bs = bs;
        iolog->nr_samples++;
 }
 
@@ -1203,9 +1611,76 @@ static inline void reset_io_stat(struct io_stat *ios)
        ios->mean.u.f = ios->S.u.f = 0;
 }
 
+void reset_io_stats(struct thread_data *td)
+{
+       struct thread_stat *ts = &td->ts;
+       int i, j;
+
+       for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+               reset_io_stat(&ts->clat_stat[i]);
+               reset_io_stat(&ts->slat_stat[i]);
+               reset_io_stat(&ts->lat_stat[i]);
+               reset_io_stat(&ts->bw_stat[i]);
+               reset_io_stat(&ts->iops_stat[i]);
+
+               ts->io_bytes[i] = 0;
+               ts->runtime[i] = 0;
+
+               for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
+                       ts->io_u_plat[i][j] = 0;
+       }
+
+       for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
+               ts->io_u_map[i] = 0;
+               ts->io_u_submit[i] = 0;
+               ts->io_u_complete[i] = 0;
+               ts->io_u_lat_u[i] = 0;
+               ts->io_u_lat_m[i] = 0;
+               ts->total_submit = 0;
+               ts->total_complete = 0;
+       }
+
+       for (i = 0; i < 3; i++) {
+               ts->total_io_u[i] = 0;
+               ts->short_io_u[i] = 0;
+               ts->drop_io_u[i] = 0;
+       }
+}
+
+static void _add_stat_to_log(struct io_log *iolog, unsigned long elapsed)
+{
+       /*
+        * Note an entry in the log. Use the mean from the logged samples,
+        * making sure to properly round up. Only write a log entry if we
+        * had actual samples done.
+        */
+       if (iolog->avg_window[DDIR_READ].samples) {
+               unsigned long mr;
+
+               mr = iolog->avg_window[DDIR_READ].mean.u.f + 0.50;
+               __add_log_sample(iolog, mr, DDIR_READ, 0, elapsed, 0);
+       }
+       if (iolog->avg_window[DDIR_WRITE].samples) {
+               unsigned long mw;
+
+               mw = iolog->avg_window[DDIR_WRITE].mean.u.f + 0.50;
+               __add_log_sample(iolog, mw, DDIR_WRITE, 0, elapsed, 0);
+       }
+       if (iolog->avg_window[DDIR_TRIM].samples) {
+               unsigned long mw;
+
+               mw = iolog->avg_window[DDIR_TRIM].mean.u.f + 0.50;
+               __add_log_sample(iolog, mw, DDIR_TRIM, 0, elapsed, 0);
+       }
+
+       reset_io_stat(&iolog->avg_window[DDIR_READ]);
+       reset_io_stat(&iolog->avg_window[DDIR_WRITE]);
+       reset_io_stat(&iolog->avg_window[DDIR_TRIM]);
+}
+
 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
                           unsigned long val, enum fio_ddir ddir,
-                          unsigned int bs)
+                          unsigned int bs, uint64_t offset)
 {
        unsigned long elapsed, this_window;
 
@@ -1218,7 +1693,7 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
         * If no time averaging, just add the log sample.
         */
        if (!iolog->avg_msec) {
-               __add_log_sample(iolog, val, ddir, bs, elapsed);
+               __add_log_sample(iolog, val, ddir, bs, elapsed, offset);
                return;
        }
 
@@ -1236,27 +1711,27 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
        if (this_window < iolog->avg_msec)
                return;
 
-       /*
-        * Note an entry in the log. Use the mean from the logged samples,
-        * making sure to properly round up. Only write a log entry if we
-        * had actual samples done.
-        */
-       if (iolog->avg_window[DDIR_READ].samples) {
-               unsigned long mr;
+       _add_stat_to_log(iolog, elapsed);
 
-               mr = iolog->avg_window[DDIR_READ].mean.u.f + 0.50;
-               __add_log_sample(iolog, mr, DDIR_READ, 0, elapsed);
-       }
-       if (iolog->avg_window[DDIR_WRITE].samples) {
-               unsigned long mw;
+       iolog->avg_last = elapsed;
+}
 
-               mw = iolog->avg_window[DDIR_WRITE].mean.u.f + 0.50;
-               __add_log_sample(iolog, mw, DDIR_WRITE, 0, elapsed);
-       }
+void finalize_logs(struct thread_data *td)
+{
+       unsigned long elapsed;
 
-       reset_io_stat(&iolog->avg_window[DDIR_READ]);
-       reset_io_stat(&iolog->avg_window[DDIR_WRITE]);
-       iolog->avg_last = elapsed;
+       elapsed = mtime_since_now(&td->epoch);
+
+       if (td->clat_log)
+               _add_stat_to_log(td->clat_log, elapsed);
+       if (td->slat_log)
+               _add_stat_to_log(td->slat_log, elapsed);
+       if (td->lat_log)
+               _add_stat_to_log(td->lat_log, elapsed);
+       if (td->bw_log)
+               _add_stat_to_log(td->bw_log, elapsed);
+       if (td->iops_log)
+               _add_stat_to_log(td->iops_log, elapsed);
 }
 
 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
@@ -1267,7 +1742,7 @@ void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
                return;
 
        iolog = agg_io_log[ddir];
-       __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis());
+       __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis(), 0);
 }
 
 static void add_clat_percentile_sample(struct thread_stat *ts,
@@ -1280,7 +1755,7 @@ static void add_clat_percentile_sample(struct thread_stat *ts,
 }
 
 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
-                    unsigned long usec, unsigned int bs)
+                    unsigned long usec, unsigned int bs, uint64_t offset)
 {
        struct thread_stat *ts = &td->ts;
 
@@ -1290,14 +1765,14 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
        add_stat_sample(&ts->clat_stat[ddir], usec);
 
        if (td->clat_log)
-               add_log_sample(td, td->clat_log, usec, ddir, bs);
+               add_log_sample(td, td->clat_log, usec, ddir, bs, offset);
 
        if (ts->clat_percentiles)
                add_clat_percentile_sample(ts, usec, ddir);
 }
 
 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
-                    unsigned long usec, unsigned int bs)
+                    unsigned long usec, unsigned int bs, uint64_t offset)
 {
        struct thread_stat *ts = &td->ts;
 
@@ -1307,11 +1782,11 @@ void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
        add_stat_sample(&ts->slat_stat[ddir], usec);
 
        if (td->slat_log)
-               add_log_sample(td, td->slat_log, usec, ddir, bs);
+               add_log_sample(td, td->slat_log, usec, ddir, bs, offset);
 }
 
 void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
-                   unsigned long usec, unsigned int bs)
+                   unsigned long usec, unsigned int bs, uint64_t offset)
 {
        struct thread_stat *ts = &td->ts;
 
@@ -1321,7 +1796,7 @@ void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
        add_stat_sample(&ts->lat_stat[ddir], usec);
 
        if (td->lat_log)
-               add_log_sample(td, td->lat_log, usec, ddir, bs);
+               add_log_sample(td, td->lat_log, usec, ddir, bs, offset);
 }
 
 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
@@ -1340,18 +1815,22 @@ void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
        /*
         * Compute both read and write rates for the interval.
         */
-       for (ddir = DDIR_READ; ddir <= DDIR_WRITE; ddir++) {
+       for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
                uint64_t delta;
 
                delta = td->this_io_bytes[ddir] - td->stat_io_bytes[ddir];
                if (!delta)
                        continue; /* No entries for interval */
 
-               rate = delta * 1000 / spent / 1024;
+               if (spent)
+                       rate = delta * 1000 / spent / 1024;
+               else
+                       rate = 0;
+
                add_stat_sample(&ts->bw_stat[ddir], rate);
 
                if (td->bw_log)
-                       add_log_sample(td, td->bw_log, rate, ddir, bs);
+                       add_log_sample(td, td->bw_log, rate, ddir, bs, 0);
 
                td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
        }
@@ -1359,7 +1838,7 @@ void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
        fio_gettime(&td->bw_sample_time, NULL);
 }
 
-void add_iops_sample(struct thread_data *td, enum fio_ddir ddir,
+void add_iops_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
                     struct timeval *t)
 {
        struct thread_stat *ts = &td->ts;
@@ -1375,21 +1854,90 @@ void add_iops_sample(struct thread_data *td, enum fio_ddir ddir,
        /*
         * Compute both read and write rates for the interval.
         */
-       for (ddir = DDIR_READ; ddir <= DDIR_WRITE; ddir++) {
+       for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
                uint64_t delta;
 
                delta = td->this_io_blocks[ddir] - td->stat_io_blocks[ddir];
                if (!delta)
                        continue; /* No entries for interval */
 
-               iops = (delta * 1000) / spent;
+               if (spent)
+                       iops = (delta * 1000) / spent;
+               else
+                       iops = 0;
+
                add_stat_sample(&ts->iops_stat[ddir], iops);
 
                if (td->iops_log)
-                       add_log_sample(td, td->iops_log, iops, ddir, 0);
+                       add_log_sample(td, td->iops_log, iops, ddir, bs, 0);
 
                td->stat_io_blocks[ddir] = td->this_io_blocks[ddir];
        }
 
        fio_gettime(&td->iops_sample_time, NULL);
 }
+
+void stat_init(void)
+{
+       stat_mutex = fio_mutex_init(FIO_MUTEX_UNLOCKED);
+}
+
+void stat_exit(void)
+{
+       /*
+        * When we have the mutex, we know out-of-band access to it
+        * have ended.
+        */
+       fio_mutex_down(stat_mutex);
+       fio_mutex_remove(stat_mutex);
+}
+
+static pthread_t si_thread;
+static pthread_cond_t si_cond;
+static pthread_mutex_t si_lock;
+static int si_thread_exit;
+
+/*
+ * Called from signal handler. Wake up status thread.
+ */
+void show_running_run_stats(void)
+{
+       pthread_cond_signal(&si_cond);
+}
+
+static void *si_thread_main(void *unused)
+{
+       while (!si_thread_exit) {
+               pthread_cond_wait(&si_cond, &si_lock);
+               if (si_thread_exit)
+                       break;
+
+               __show_running_run_stats();
+       }
+
+       return NULL;
+}
+
+void create_status_interval_thread(void)
+{
+       int ret;
+
+       pthread_cond_init(&si_cond, NULL);
+       pthread_mutex_init(&si_lock, NULL);
+
+       ret = pthread_create(&si_thread, NULL, si_thread_main, NULL);
+       if (ret) {
+               log_err("Can't create status thread: %s\n", strerror(ret));
+               return;
+       }
+}
+
+void wait_for_status_interval_thread_exit(void)
+{
+       void *ret;
+
+       si_thread_exit = 1;
+       pthread_cond_signal(&si_cond);
+       pthread_join(si_thread, &ret);
+       pthread_cond_destroy(&si_cond);
+}