Add completion percentiles to results output
[fio.git] / stat.c
diff --git a/stat.c b/stat.c
index 25dd179..40ca1d3 100644 (file)
--- a/stat.c
+++ b/stat.c
@@ -9,23 +9,24 @@
 
 #include "fio.h"
 #include "diskutil.h"
+#include "lib/ieee754.h"
 
 void update_rusage_stat(struct thread_data *td)
 {
        struct thread_stat *ts = &td->ts;
 
-       getrusage(RUSAGE_SELF, &ts->ru_end);
+       getrusage(RUSAGE_SELF, &td->ru_end);
 
-       ts->usr_time += mtime_since(&ts->ru_start.ru_utime,
-                                       &ts->ru_end.ru_utime);
-       ts->sys_time += mtime_since(&ts->ru_start.ru_stime,
-                                       &ts->ru_end.ru_stime);
-       ts->ctx += ts->ru_end.ru_nvcsw + ts->ru_end.ru_nivcsw
-                       - (ts->ru_start.ru_nvcsw + ts->ru_start.ru_nivcsw);
-       ts->minf += ts->ru_end.ru_minflt - ts->ru_start.ru_minflt;
-       ts->majf += ts->ru_end.ru_majflt - ts->ru_start.ru_majflt;
+       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,
+                                       &td->ru_end.ru_stime);
+       ts->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw
+                       - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw);
+       ts->minf += td->ru_end.ru_minflt - td->ru_start.ru_minflt;
+       ts->majf += td->ru_end.ru_majflt - td->ru_start.ru_majflt;
 
-       memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
+       memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
 }
 
 /*
@@ -47,8 +48,10 @@ static unsigned int plat_val_to_idx(unsigned int val)
        else
                msb = (sizeof(val)*8) - __builtin_clz(val) - 1;
 
-       /* MSB <= (FIO_IO_U_PLAT_BITS-1), cannot be rounded off. Use
-        * all bits of the sample as index */
+       /*
+        * MSB <= (FIO_IO_U_PLAT_BITS-1), cannot be rounded off. Use
+        * all bits of the sample as index
+        */
        if (msb <= FIO_IO_U_PLAT_BITS)
                return val;
 
@@ -58,8 +61,10 @@ static unsigned int plat_val_to_idx(unsigned int val)
        /* Compute the number of buckets before the group */
        base = (error_bits + 1) << FIO_IO_U_PLAT_BITS;
 
-       /* Discard the error bits and apply the mask to find the
-         * index for the buckets in the group */
+       /*
+        * Discard the error bits and apply the mask to find the
+         * 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) */
@@ -97,67 +102,138 @@ static unsigned int plat_idx_to_val(unsigned int idx)
 
 static int double_cmp(const void *a, const void *b)
 {
-       const double fa = *(const double *)a;
-       const double fb = *(const double *)b;
+       const fio_fp64_t fa = *(const fio_fp64_t *) a;
+       const fio_fp64_t fb = *(const fio_fp64_t *) b;
        int cmp = 0;
 
-       if (fa > fb)
+       if (fa.u.f > fb.u.f)
                cmp = 1;
-       else if (fa < fb)
+       else if (fa.u.f < fb.u.f)
                cmp = -1;
 
        return cmp;
 }
 
-/*
- * Find and display the p-th percentile of clat
- */
-static void show_clat_percentiles(unsigned int* io_u_plat, unsigned long nr,
-                                double* user_list)
+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;
-       static const double def_list[FIO_IO_U_LIST_MAX_LEN] = {
-                       1.0, 5.0, 10.0, 20.0, 30.0,
-                       40.0, 50.0, 60.0, 70.0, 80.0,
-                       90.0, 95.0, 99.0, 99.5, 99.9};
+       unsigned int oval_len = 0;
+       unsigned int *ovals = NULL;
+       int is_last;
 
-       const double* plist = user_list? user_list: def_list;
-       for (len = 0; len <FIO_IO_U_LIST_MAX_LEN && plist[len] != 0; len++) {}
+       *minv = -1U;
+       *maxv = 0;
 
-       /* Sort the user-specified list. Note that this does not work
-          for NaN values */
-       if (user_list && len > 1)
-               qsort((void*)user_list, len, sizeof(user_list[0]), double_cmp);
+       len = 0;
+       while (len < FIO_IO_U_LIST_MAX_LEN && plist[len].u.f != 0.0)
+               len++;
 
-       int is_last = 0;
-       log_info("    clat percentiles (usec) :");
+       if (!len)
+               return 0;
 
-       for (i = 0; i <FIO_IO_U_PLAT_NR && !is_last; i++) {
-               sum += io_u_plat[i];
-               while (sum >= (plist[j]/100 * nr)) {
-                       assert(plist[j] <= 100.0);
+       /*
+        * Sort the percentile list. Note that it may already be sorted if
+        * we are using the default values, but since it's a short list this
+        * 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);
 
-                       if (j!=0 && (j%4) == 0) /* for formatting */
-                               log_info("                             ");
+       /*
+        * Calculate bucket values, note down max and min values
+        */
+       is_last = 0;
+       for (i = 0; i < FIO_IO_U_PLAT_NR && !is_last; i++) {
+               sum += io_u_plat[i];
+               while (sum >= (plist[j].u.f / 100.0 * nr)) {
+                       assert(plist[j].u.f <= 100.0);
 
-                       /* end of the list */
-                       is_last = (j == len - 1);
+                       if (j == oval_len) {
+                               oval_len += 100;
+                               ovals = realloc(ovals, oval_len * sizeof(unsigned int));
+                       }
 
-                       log_info(" %2.2fth=%u%c", plist[j], plat_idx_to_val(i),
-                                (is_last? '\n' : ','));
+                       ovals[j] = plat_idx_to_val(i);
+                       if (ovals[j] < *minv)
+                               *minv = ovals[j];
+                       if (ovals[j] > *maxv)
+                               *maxv = ovals[j];
 
-                       if (is_last) break;
+                       is_last = (j == len - 1);
+                       if (is_last)
+                               break;
 
-                       if (j%4 == 3)   /* for formatting */
-                               log_info("\n");
                        j++;
                }
        }
+
+       *output = ovals;
+       return len;
+}
+
+/*
+ * 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)
+{
+       unsigned int len, j = 0, minv, maxv;
+       unsigned int *ovals;
+       int is_last, scale_down;
+
+       len = calc_clat_percentiles(io_u_plat, nr, plist, &ovals, &maxv, &minv);
+       if (!len)
+               goto out;
+
+       /*
+        * We default to usecs, but if the value range is such that we
+        * should scale down to msecs, do that.
+        */
+       if (minv > 2000 && maxv > 99999) {
+               scale_down = 1;
+               log_info("    clat percentiles (msec):\n     |");
+       } else {
+               scale_down = 0;
+               log_info("    clat percentiles (usec):\n     |");
+       }
+
+       for (j = 0; j < len; j++) {
+               char fbuf[8];
+
+               /* for formatting */
+               if (j != 0 && (j % 4) == 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);
+
+               if (scale_down)
+                       ovals[j] = (ovals[j] + 999) / 1000;
+
+               log_info(" %sth=[%5u]%c", fbuf, ovals[j], is_last ? '\n' : ',');
+
+               if (is_last)
+                       break;
+
+               if (j % 4 == 3) /* for formatting */
+                       log_info("\n");
+       }
+
+out:
+       if (ovals)
+               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;
 
@@ -168,23 +244,23 @@ static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
        *max = is->max_val;
 
        n = (double) is->samples;
-       *mean = is->mean;
+       *mean = is->mean.u.f;
 
        if (n > 1.0)
-               *dev = sqrt(is->S / (n - 1.0));
+               *dev = sqrt(is->S.u.f / (n - 1.0));
        else
                *dev = 0;
 
        return 1;
 }
 
-static void show_group_stats(struct group_run_stats *rs, int id)
+void show_group_stats(struct group_run_stats *rs)
 {
        char *p1, *p2, *p3, *p4;
        const char *ddir_str[] = { "   READ", "  WRITE" };
        int i;
 
-       log_info("\nRun status group %d (all jobs):\n", id);
+       log_info("\nRun status group %d (all jobs):\n", rs->groupid);
 
        for (i = 0; i <= DDIR_WRITE; i++) {
                const int i2p = is_power_of_2(rs->kb_base);
@@ -261,18 +337,23 @@ static 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);
+       maxp = num2str(max, 6, 1, 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,
@@ -308,81 +389,55 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
        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);
        }
        if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
-               double p_of_agg;
+               double p_of_agg = 100.0;
+               const char *bw_str = "KB";
+
+               if (rs->agg[ddir]) {
+                       p_of_agg = mean * 100 / (double) rs->agg[ddir];
+                       if (p_of_agg > 100.0)
+                               p_of_agg = 100.0;
+               }
+
+               if (mean > 999999.9) {
+                       min /= 1000.0;
+                       max /= 1000.0;
+                       mean /= 1000.0;
+                       dev /= 1000.0;
+                       bw_str = "MB";
+               }
 
-               p_of_agg = mean * 100 / (double) rs->agg[ddir];
-               log_info("    bw (KB/s) : min=%5lu, max=%5lu, per=%3.2f%%,"
-                        " avg=%5.02f, stdev=%5.02f\n", min, max, p_of_agg,
-                                                       mean, dev);
+               log_info("    bw (%s/s)  : min=%5lu, max=%5lu, per=%3.2f%%,"
+                        " avg=%5.02f, stdev=%5.02f\n", bw_str, min, max,
+                                                       p_of_agg, mean, dev);
        }
 }
 
-static void show_lat(double *io_u_lat, int nr, const char **ranges,
-                    const char *msg)
+static int show_lat(double *io_u_lat, int nr, const char **ranges,
+                   const char *msg)
 {
-       int new_line = 1, i, line = 0;
+       int new_line = 1, i, line = 0, shown = 0;
 
        for (i = 0; i < nr; i++) {
                if (io_u_lat[i] <= 0.0)
                        continue;
+               shown = 1;
                if (new_line) {
                        if (line)
                                log_info("\n");
-                       log_info("     lat (%s): ", msg);
+                       log_info("    lat (%s) : ", msg);
                        new_line = 0;
                        line = 0;
                }
@@ -393,6 +448,11 @@ static void show_lat(double *io_u_lat, int nr, const char **ranges,
                if (line == 5)
                        new_line = 1;
        }
+
+       if (shown)
+               log_info("\n");
+
+       return shown;
 }
 
 static void show_lat_u(double *io_u_lat_u)
@@ -412,16 +472,17 @@ 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,
+                          double *io_u_lat_m)
 {
+       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);
-       log_info("\n");
        show_lat_m(io_u_lat_m);
-       log_info("\n");
 }
 
-static void show_thread_status(struct thread_stat *ts,
-                              struct group_run_stats *rs)
+void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs)
 {
        double usr_cpu, sys_cpu;
        unsigned long runtime;
@@ -443,7 +504,7 @@ static void show_thread_status(struct thread_stat *ts,
                                        ts->error, ts->verror, (int) ts->pid);
        }
 
-       if (ts->description)
+       if (strlen(ts->description))
                log_info("  Description  : [%s]\n", ts->description);
 
        if (ts->io_bytes[DDIR_READ])
@@ -451,6 +512,8 @@ static void show_thread_status(struct thread_stat *ts,
        if (ts->io_bytes[DDIR_WRITE])
                show_ddir_status(rs, ts, DDIR_WRITE);
 
+       show_latencies(ts, io_u_lat_u, io_u_lat_m);
+
        runtime = ts->total_run_time;
        if (runtime) {
                double runt = (double) runtime;
@@ -484,14 +547,12 @@ static void show_thread_status(struct thread_stat *ts,
                                        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 r/w/d: total=%lu/%lu/%lu, short=%lu/%lu/%lu\n",
+       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]);
-       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);
        if (ts->continue_on_error) {
                log_info("     errors    : total=%lu, first_error=%d/<%s>\n",
                                        ts->total_err_count,
@@ -504,16 +565,23 @@ static void show_ddir_status_terse(struct thread_stat *ts,
                                   struct group_run_stats *rs, int ddir)
 {
        unsigned long min, max;
-       unsigned long long bw;
+       unsigned long long bw, iops;
+       unsigned int *ovals = NULL;
        double mean, dev;
+       unsigned int len, minv, maxv;
+       int i;
 
        assert(ddir_rw(ddir));
 
-       bw = 0;
-       if (ts->runtime[ddir])
-               bw = ts->io_bytes[ddir] / ts->runtime[ddir];
+       iops = bw = 0;
+       if (ts->runtime[ddir]) {
+               uint64_t runt = ts->runtime[ddir];
+
+               bw = ts->io_bytes[ddir] / runt;
+               iops = (1000 * (uint64_t) ts->total_io_u[ddir]) / runt;
+       }
 
-       log_info(";%llu;%llu;%llu", ts->io_bytes[ddir] >> 10, bw,
+       log_info(";%llu;%llu;%llu;%llu", ts->io_bytes[ddir] >> 10, bw, iops,
                                                        ts->runtime[ddir]);
 
        if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
@@ -526,24 +594,46 @@ static void show_ddir_status_terse(struct thread_stat *ts,
        else
                log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 
+       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;
+
+       for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
+               if (i >= len) {
+                       log_info(";0%%=0");
+                       continue;
+               }
+               log_info(";%2.2f%%=%u", ts->percentile_list[i].u.f, ovals[i]);
+       }
+
        if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
                log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
        else
                log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 
+       if (ovals)
+               free(ovals);
+
        if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
-               double p_of_agg;
+               double p_of_agg = 100.0;
+
+               if (rs->agg[ddir]) {
+                       p_of_agg = mean * 100 / (double) rs->agg[ddir];
+                       if (p_of_agg > 100.0)
+                               p_of_agg = 100.0;
+               }
 
-               p_of_agg = mean * 100 / (double) rs->agg[ddir];
                log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
        } else
                log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 }
 
-#define FIO_TERSE_VERSION      "2"
-
-static void show_thread_status_terse(struct thread_stat *ts,
-                                    struct group_run_stats *rs)
+static void show_thread_status_terse_v2(struct thread_stat *ts,
+                                       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];
@@ -552,8 +642,7 @@ static void show_thread_status_terse(struct thread_stat *ts,
        int i;
 
        /* General Info */
-       log_info("%s;%s;%d;%d", FIO_TERSE_VERSION, ts->name, ts->groupid,
-                               ts->error);
+       log_info("2;%s;%d;%d", ts->name, ts->groupid, ts->error);
        /* Log Read Status */
        show_ddir_status_terse(ts, rs, 0);
        /* Log Write Status */
@@ -601,10 +690,87 @@ static void show_thread_status_terse(struct thread_stat *ts,
        log_info("\n");
 }
 
+#define FIO_TERSE_VERSION      "3"
+
+static void show_thread_status_terse_v3(struct thread_stat *ts,
+                                       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];
+       double io_u_lat_m[FIO_IO_U_LAT_M_NR];
+       double usr_cpu, sys_cpu;
+       int i;
+
+       /* General Info */
+       log_info("%s;%s;%s;%d;%d", FIO_TERSE_VERSION, fio_version_string,
+                                       ts->name, ts->groupid, ts->error);
+       /* Log Read Status */
+       show_ddir_status_terse(ts, rs, 0);
+       /* Log Write Status */
+       show_ddir_status_terse(ts, rs, 1);
+
+       /* 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;
+       }
+
+       log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf,
+                                                               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_lat_u(ts, io_u_lat_u);
+       stat_calc_lat_m(ts, io_u_lat_m);
+
+       /* Only show fixed 7 I/O depth levels*/
+       log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
+                       io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
+                       io_u_dist[4], io_u_dist[5], io_u_dist[6]);
+
+       /* Microsecond latency */
+       for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
+               log_info(";%3.2f%%", io_u_lat_u[i]);
+       /* Millisecond latency */
+       for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
+               log_info(";%3.2f%%", io_u_lat_m[i]);
+
+       /* disk util stats, if any */
+       show_disk_util(1);
+
+       /* 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("\n");
+
+       /* Additional output if description is set */
+       if (strlen(ts->description))
+               log_info(";%s", ts->description);
+}
+
+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
+               log_err("fio: bad terse version!? %d\n", terse_version);
+}
+
 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
 {
        double mean, S;
 
+       if (src->samples == 0)
+               return;
+
        dst->min_val = min(dst->min_val, src->min_val);
        dst->max_val = max(dst->max_val, src->max_val);
 
@@ -614,23 +780,114 @@ static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
         *  #Parallel_algorithm>
         */
        if (nr == 1) {
-               mean = src->mean;
-               S = src->S;
+               mean = src->mean.u.f;
+               S = src->S.u.f;
        } else {
-               double delta = src->mean - dst->mean;
+               double delta = src->mean.u.f - dst->mean.u.f;
 
-               mean = ((src->mean * src->samples) +
-                       (dst->mean * dst->samples)) /
+               mean = ((src->mean.u.f * src->samples) +
+                       (dst->mean.u.f * dst->samples)) /
                        (dst->samples + src->samples);
 
-               S =  src->S + dst->S + pow(delta, 2.0) *
+               S =  src->S.u.f + dst->S.u.f + pow(delta, 2.0) *
                        (dst->samples * src->samples) /
                        (dst->samples + src->samples);
        }
 
        dst->samples += src->samples;
-       dst->mean = mean;
-       dst->S = S;
+       dst->mean.u.f = mean;
+       dst->S.u.f = S;
+}
+
+void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src)
+{
+       int i;
+
+       for (i = 0; i < 2; 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])
+                       dst->min_run[i] = src->min_run[i];
+               if (dst->max_bw[i] < src->max_bw[i])
+                       dst->max_bw[i] = src->max_bw[i];
+               if (dst->min_bw[i] && dst->min_bw[i] > src->min_bw[i])
+                       dst->min_bw[i] = src->min_bw[i];
+
+               dst->io_kb[i] += src->io_kb[i];
+               dst->agg[i] += src->agg[i];
+       }
+
+}
+
+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);
+
+               dst->io_bytes[l] += src->io_bytes[l];
+
+               if (dst->runtime[l] < src->runtime[l])
+                       dst->runtime[l] = src->runtime[l];
+       }
+
+       dst->usr_time += src->usr_time;
+       dst->sys_time += src->sys_time;
+       dst->ctx += src->ctx;
+       dst->majf += src->majf;
+       dst->minf += src->minf;
+
+       for (k = 0; k < FIO_IO_U_MAP_NR; k++)
+               dst->io_u_map[k] += src->io_u_map[k];
+       for (k = 0; k < FIO_IO_U_MAP_NR; k++)
+               dst->io_u_submit[k] += src->io_u_submit[k];
+       for (k = 0; k < FIO_IO_U_MAP_NR; k++)
+               dst->io_u_complete[k] += src->io_u_complete[k];
+       for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
+               dst->io_u_lat_u[k] += src->io_u_lat_u[k];
+       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_WRITE; 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];
+       }
+
+       dst->total_run_time += src->total_run_time;
+       dst->total_submit += src->total_submit;
+       dst->total_complete += src->total_complete;
+}
+
+void init_group_run_stat(struct group_run_stats *gs)
+{
+       memset(gs, 0, sizeof(*gs));
+       gs->min_bw[0] = gs->min_run[0] = ~0UL;
+       gs->min_bw[1] = gs->min_run[1] = ~0UL;
+}
+
+void init_thread_stat(struct thread_stat *ts)
+{
+       int j;
+
+       memset(ts, 0, sizeof(*ts));
+
+       for (j = 0; j <= DDIR_WRITE; j++) {
+               ts->lat_stat[j].min_val = -1UL;
+               ts->clat_stat[j].min_val = -1UL;
+               ts->slat_stat[j].min_val = -1UL;
+               ts->bw_stat[j].min_val = -1UL;
+       }
+       ts->groupid = -1;
 }
 
 void show_run_stats(void)
@@ -638,18 +895,13 @@ void show_run_stats(void)
        struct group_run_stats *runstats, *rs;
        struct thread_data *td;
        struct thread_stat *threadstats, *ts;
-       int i, j, k, l, nr_ts, last_ts, idx;
+       int i, j, nr_ts, last_ts, idx;
        int kb_base_warned = 0;
 
        runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 
-       for (i = 0; i < groupid + 1; i++) {
-               rs = &runstats[i];
-
-               memset(rs, 0, sizeof(*rs));
-               rs->min_bw[0] = rs->min_run[0] = ~0UL;
-               rs->min_bw[1] = rs->min_run[1] = ~0UL;
-       }
+       for (i = 0; i < groupid + 1; i++)
+               init_group_run_stat(&runstats[i]);
 
        /*
         * find out how many threads stats we need. if group reporting isn't
@@ -671,18 +923,8 @@ void show_run_stats(void)
 
        threadstats = malloc(nr_ts * sizeof(struct thread_stat));
 
-       for (i = 0; i < nr_ts; i++) {
-               ts = &threadstats[i];
-
-               memset(ts, 0, sizeof(*ts));
-               for (j = 0; j <= DDIR_WRITE; j++) {
-                       ts->lat_stat[j].min_val = -1UL;
-                       ts->clat_stat[j].min_val = -1UL;
-                       ts->slat_stat[j].min_val = -1UL;
-                       ts->bw_stat[j].min_val = -1UL;
-               }
-               ts->groupid = -1;
-       }
+       for (i = 0; i < nr_ts; i++)
+               init_thread_stat(&threadstats[i]);
 
        j = 0;
        last_ts = -1;
@@ -700,9 +942,9 @@ void show_run_stats(void)
 
                ts->clat_percentiles = td->o.clat_percentiles;
                if (td->o.overwrite_plist)
-                       ts->percentile_list = td->o.percentile_list;
+                       memcpy(ts->percentile_list, td->o.percentile_list, sizeof(td->o.percentile_list));
                else
-                       ts->percentile_list = NULL;
+                       memcpy(ts->percentile_list, def_percentile_list, sizeof(def_percentile_list));
 
                idx++;
                ts->members++;
@@ -711,8 +953,13 @@ void show_run_stats(void)
                        /*
                         * These are per-group shared already
                         */
-                       ts->name = td->o.name;
-                       ts->description = td->o.description;
+                       strncpy(ts->name, td->o.name, FIO_JOBNAME_SIZE);
+                       if (td->o.description)
+                               strncpy(ts->description, td->o.description,
+                                               FIO_JOBNAME_SIZE);
+                       else
+                               memset(ts->description, 0, FIO_JOBNAME_SIZE);
+
                        ts->groupid = td->groupid;
 
                        /*
@@ -734,56 +981,14 @@ void show_run_stats(void)
                        if (!td->error && td->o.continue_on_error &&
                            td->first_error) {
                                ts->error = td->first_error;
-                               ts->verror = td->verror;
+                               strcpy(ts->verror, td->verror);
                        } else  if (td->error) {
                                ts->error = td->error;
-                               ts->verror = td->verror;
+                               strcpy(ts->verror, td->verror);
                        }
                }
 
-               for (l = 0; l <= DDIR_WRITE; l++) {
-                       sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
-                       sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
-                       sum_stat(&ts->lat_stat[l], &td->ts.lat_stat[l], idx);
-                       sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
-
-                       ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
-                       ts->io_bytes[l] += td->ts.io_bytes[l];
-
-                       if (ts->runtime[l] < td->ts.runtime[l])
-                               ts->runtime[l] = td->ts.runtime[l];
-               }
-
-               ts->usr_time += td->ts.usr_time;
-               ts->sys_time += td->ts.sys_time;
-               ts->ctx += td->ts.ctx;
-               ts->majf += td->ts.majf;
-               ts->minf += td->ts.minf;
-
-               for (k = 0; k < FIO_IO_U_MAP_NR; k++)
-                       ts->io_u_map[k] += td->ts.io_u_map[k];
-               for (k = 0; k < FIO_IO_U_MAP_NR; k++)
-                       ts->io_u_submit[k] += td->ts.io_u_submit[k];
-               for (k = 0; k < FIO_IO_U_MAP_NR; k++)
-                       ts->io_u_complete[k] += td->ts.io_u_complete[k];
-               for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
-                       ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
-               for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
-                       ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
-
-
-               for (k = 0; k <= 2; k++) {
-                       ts->total_io_u[k] += td->ts.total_io_u[k];
-                       ts->short_io_u[k] += td->ts.short_io_u[k];
-
-                       int m;
-                       for (m = 0; m < FIO_IO_U_PLAT_NR; m++)
-                               ts->io_u_plat[k][m] += td->ts.io_u_plat[k][m];
-               }
-
-               ts->total_run_time += td->ts.total_run_time;
-               ts->total_submit += td->ts.total_submit;
-               ts->total_complete += td->ts.total_complete;
+               sum_thread_stats(ts, &td->ts, idx);
        }
 
        for (i = 0; i < nr_ts; i++) {
@@ -840,19 +1045,31 @@ void show_run_stats(void)
                ts = &threadstats[i];
                rs = &runstats[ts->groupid];
 
-               if (terse_output)
+               if (is_backend)
+                       fio_server_send_ts(ts, rs);
+               else if (terse_output)
                        show_thread_status_terse(ts, rs);
                else
                        show_thread_status(ts, rs);
        }
 
-       if (!terse_output) {
-               for (i = 0; i < groupid + 1; i++)
-                       show_group_stats(&runstats[i], i);
+       for (i = 0; i < groupid + 1; i++) {
+               rs = &runstats[i];
 
-               show_disk_util();
+               rs->groupid = i;
+               if (is_backend)
+                       fio_server_send_gs(rs);
+               else if (!terse_output)
+                       show_group_stats(rs);
        }
 
+       if (is_backend)
+               fio_server_send_du();
+       else if (!terse_output)
+               show_disk_util(0);
+
+       free_disk_util();
+
        free(runstats);
        free(threadstats);
 }
@@ -867,10 +1084,10 @@ static inline void add_stat_sample(struct io_stat *is, unsigned long data)
        if (data < is->min_val)
                is->min_val = data;
 
-       delta = val - is->mean;
+       delta = val - is->mean.u.f;
        if (delta) {
-               is->mean += delta / (is->samples + 1.0);
-               is->S += delta * (val - is->mean);
+               is->mean.u.f += delta / (is->samples + 1.0);
+               is->S.u.f += delta * (val - is->mean.u.f);
        }
 
        is->samples++;
@@ -882,6 +1099,9 @@ static void __add_log_sample(struct io_log *iolog, unsigned long val,
 {
        const int nr_samples = iolog->nr_samples;
 
+       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;
 
@@ -896,14 +1116,66 @@ static void __add_log_sample(struct io_log *iolog, unsigned long val,
        iolog->nr_samples++;
 }
 
+static inline void reset_io_stat(struct io_stat *ios)
+{
+       ios->max_val = ios->min_val = ios->samples = 0;
+       ios->mean.u.f = ios->S.u.f = 0;
+}
+
 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
                           unsigned long val, enum fio_ddir ddir,
                           unsigned int bs)
 {
+       unsigned long elapsed, this_window;
+
        if (!ddir_rw(ddir))
                return;
 
-       __add_log_sample(iolog, val, ddir, bs, mtime_since_now(&td->epoch));
+       elapsed = mtime_since_now(&td->epoch);
+
+       /*
+        * If no time averaging, just add the log sample.
+        */
+       if (!iolog->avg_msec) {
+               __add_log_sample(iolog, val, ddir, bs, elapsed);
+               return;
+       }
+
+       /*
+        * Add the sample. If the time period has passed, then
+        * add that entry to the log and clear.
+        */
+       add_stat_sample(&iolog->avg_window[ddir], val);
+
+       /*
+        * If period hasn't passed, adding the above sample is all we
+        * need to do.
+        */
+       this_window = elapsed - iolog->avg_last;
+       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;
+
+               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;
+
+               mw = iolog->avg_window[DDIR_WRITE].mean.u.f + 0.50;
+               __add_log_sample(iolog, mw, DDIR_WRITE, 0, elapsed);
+       }
+
+       reset_io_stat(&iolog->avg_window[DDIR_READ]);
+       reset_io_stat(&iolog->avg_window[DDIR_WRITE]);
+       iolog->avg_last = elapsed;
 }
 
 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
@@ -936,8 +1208,8 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 
        add_stat_sample(&ts->clat_stat[ddir], usec);
 
-       if (ts->clat_log)
-               add_log_sample(td, ts->clat_log, usec, ddir, bs);
+       if (td->clat_log)
+               add_log_sample(td, td->clat_log, usec, ddir, bs);
 
        if (ts->clat_percentiles)
                add_clat_percentile_sample(ts, usec, ddir);
@@ -953,8 +1225,8 @@ void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 
        add_stat_sample(&ts->slat_stat[ddir], usec);
 
-       if (ts->slat_log)
-               add_log_sample(td, ts->slat_log, usec, ddir, bs);
+       if (td->slat_log)
+               add_log_sample(td, td->slat_log, usec, ddir, bs);
 }
 
 void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
@@ -967,8 +1239,8 @@ void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
 
        add_stat_sample(&ts->lat_stat[ddir], usec);
 
-       if (ts->lat_log)
-               add_log_sample(td, ts->lat_log, usec, ddir, bs);
+       if (td->lat_log)
+               add_log_sample(td, td->lat_log, usec, ddir, bs);
 }
 
 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
@@ -980,17 +1252,63 @@ void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
        if (!ddir_rw(ddir))
                return;
 
-       spent = mtime_since(&ts->stat_sample_time[ddir], t);
+       spent = mtime_since(&td->bw_sample_time, t);
        if (spent < td->o.bw_avg_time)
                return;
 
-       rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) *
-                       1000 / spent / 1024;
-       add_stat_sample(&ts->bw_stat[ddir], rate);
+       /*
+        * Compute both read and write rates for the interval.
+        */
+       for (ddir = DDIR_READ; ddir <= DDIR_WRITE; 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;
+               add_stat_sample(&ts->bw_stat[ddir], rate);
+
+               if (td->bw_log)
+                       add_log_sample(td, td->bw_log, rate, ddir, bs);
+
+               td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
+       }
+
+       fio_gettime(&td->bw_sample_time, NULL);
+}
+
+void add_iops_sample(struct thread_data *td, enum fio_ddir ddir,
+                    struct timeval *t)
+{
+       struct thread_stat *ts = &td->ts;
+       unsigned long spent, iops;
+
+       if (!ddir_rw(ddir))
+               return;
+
+       spent = mtime_since(&td->iops_sample_time, t);
+       if (spent < td->o.iops_avg_time)
+               return;
+
+       /*
+        * Compute both read and write rates for the interval.
+        */
+       for (ddir = DDIR_READ; ddir <= DDIR_WRITE; ddir++) {
+               uint64_t delta;
 
-       if (ts->bw_log)
-               add_log_sample(td, ts->bw_log, rate, ddir, bs);
+               delta = td->this_io_blocks[ddir] - td->stat_io_blocks[ddir];
+               if (!delta)
+                       continue; /* No entries for interval */
+
+               iops = (delta * 1000) / spent;
+               add_stat_sample(&ts->iops_stat[ddir], iops);
+
+               if (td->iops_log)
+                       add_log_sample(td, td->iops_log, iops, ddir, 0);
+
+               td->stat_io_blocks[ddir] = td->this_io_blocks[ddir];
+       }
 
-       fio_gettime(&ts->stat_sample_time[ddir], NULL);
-       ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
+       fio_gettime(&td->iops_sample_time, NULL);
 }