Add group reporting
authorJens Axboe <jens.axboe@oracle.com>
Tue, 6 Mar 2007 14:19:24 +0000 (15:19 +0100)
committerJens Axboe <jens.axboe@oracle.com>
Tue, 6 Mar 2007 14:19:24 +0000 (15:19 +0100)
Still needs some testing, so the option isn't documented yet. The
standard deviation averaging also isn't mathematically sound.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
fio.c
fio.h
init.c
io_u.c
stat.c

diff --git a/fio.c b/fio.c
index ab84b60..48d65e0 100644 (file)
--- a/fio.c
+++ b/fio.c
@@ -661,7 +661,7 @@ static void clear_io_state(struct thread_data *td)
        struct fio_file *f;
        int i;
 
-       td->ts->stat_io_bytes[0] = td->ts->stat_io_bytes[1] = 0;
+       td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
        td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
        td->zone_bytes = 0;
 
@@ -751,15 +751,15 @@ static void *thread_main(void *data)
 
        fio_gettime(&td->epoch, NULL);
        memcpy(&td->timeout_end, &td->epoch, sizeof(td->epoch));
-       getrusage(RUSAGE_SELF, &td->ts->ru_start);
+       getrusage(RUSAGE_SELF, &td->ts.ru_start);
 
        runtime[0] = runtime[1] = 0;
        while (td->loops--) {
                fio_gettime(&td->start, NULL);
-               memcpy(&td->ts->stat_sample_time, &td->start, sizeof(td->start));
+               memcpy(&td->ts.stat_sample_time, &td->start, sizeof(td->start));
 
                if (td->ratemin)
-                       memcpy(&td->lastrate, &td->ts->stat_sample_time, sizeof(td->lastrate));
+                       memcpy(&td->lastrate, &td->ts.stat_sample_time, sizeof(td->lastrate));
 
                clear_io_state(td);
                prune_io_piece_log(td);
@@ -792,16 +792,18 @@ static void *thread_main(void *data)
        }
 
        update_rusage_stat(td);
-       fio_gettime(&td->end_time, NULL);
-       td->runtime[0] = runtime[0] / 1000;
-       td->runtime[1] = runtime[1] / 1000;
-
-       if (td->ts->bw_log)
-               finish_log(td, td->ts->bw_log, "bw");
-       if (td->ts->slat_log)
-               finish_log(td, td->ts->slat_log, "slat");
-       if (td->ts->clat_log)
-               finish_log(td, td->ts->clat_log, "clat");
+       td->ts.runtime[0] = runtime[0] / 1000;
+       td->ts.runtime[1] = runtime[1] / 1000;
+       td->ts.total_run_time = mtime_since_now(&td->epoch);
+       td->ts.io_bytes[0] = td->io_bytes[0];
+       td->ts.io_bytes[1] = td->io_bytes[1];
+
+       if (td->ts.bw_log)
+               finish_log(td, td->ts.bw_log, "bw");
+       if (td->ts.slat_log)
+               finish_log(td, td->ts.slat_log, "slat");
+       if (td->ts.clat_log)
+               finish_log(td, td->ts.clat_log, "clat");
        if (td->write_iolog_file)
                write_iolog_close(td);
        if (td->exec_postrun) {
diff --git a/fio.h b/fio.h
index d1d02b0..1b933ca 100644 (file)
--- a/fio.h
+++ b/fio.h
@@ -255,6 +255,13 @@ struct fio_file {
 #define FIO_IO_U_LAT_NR 12
 
 struct thread_stat {
+       char *name;
+       char *verror;
+       int error;
+       int groupid;
+       pid_t pid;
+       char *description;
+
        struct io_log *slat_log;
        struct io_log *clat_log;
        struct io_log *bw_log;
@@ -284,6 +291,10 @@ struct thread_stat {
        unsigned int io_u_map[FIO_IO_U_MAP_NR];
        unsigned int io_u_lat[FIO_IO_U_LAT_NR];
        unsigned long total_io_u;
+
+       unsigned long long io_bytes[2];
+       unsigned long runtime[2];
+       unsigned long total_run_time;
 };
 
 /*
@@ -299,8 +310,7 @@ struct thread_data {
        pthread_t thread;
        int thread_number;
        int groupid;
-       struct thread_stat *ts;
-       struct thread_stat __ts;
+       struct thread_stat ts;
        enum fio_filetype filetype;
        struct fio_file *files;
        unsigned int nr_files;
@@ -410,7 +420,6 @@ struct thread_data {
        unsigned long rate_bytes;
        struct timeval lastrate;
 
-       unsigned long runtime[2];               /* msec */
        unsigned long long io_size;
        unsigned long long total_file_size;
        unsigned long long start_offset;
@@ -436,7 +445,6 @@ struct thread_data {
 
        struct timeval start;   /* start of this loop */
        struct timeval epoch;   /* time job was started */
-       struct timeval end_time;/* time job ended */
 
        /*
         * read/write mixed workload state
diff --git a/init.c b/init.c
index 6dcd801..bbf6f2a 100644 (file)
--- a/init.c
+++ b/init.c
@@ -784,12 +784,6 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
        if (td == &def_thread)
                return 0;
 
-       /*
-        * this will later be shared between thread for group reporting
-        */
-       td->ts = &td->__ts;
-       memset(td->ts, 0, sizeof(*td->ts));
-
        assert(td->io_ops);
 
        if (td->odirect)
@@ -856,9 +850,9 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
                
        fio_sem_init(&td->mutex, 0);
 
-       td->ts->clat_stat[0].min_val = td->ts->clat_stat[1].min_val = ULONG_MAX;
-       td->ts->slat_stat[0].min_val = td->ts->slat_stat[1].min_val = ULONG_MAX;
-       td->ts->bw_stat[0].min_val = td->ts->bw_stat[1].min_val = ULONG_MAX;
+       td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
+       td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
+       td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 
        if (td->stonewall && td->thread_number > 1)
                groupid++;
@@ -869,11 +863,11 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
                goto err;
 
        if (td->write_lat_log) {
-               setup_log(&td->ts->slat_log);
-               setup_log(&td->ts->clat_log);
+               setup_log(&td->ts.slat_log);
+               setup_log(&td->ts.clat_log);
        }
        if (td->write_bw_log)
-               setup_log(&td->ts->bw_log);
+               setup_log(&td->ts.bw_log);
 
        if (!td->name)
                td->name = strdup(jobname);
diff --git a/io_u.c b/io_u.c
index 5b5802c..79a0ce8 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -286,8 +286,8 @@ static void io_u_mark_depth(struct thread_data *td)
                break;
        }
 
-       td->ts->io_u_map[index]++;
-       td->ts->total_io_u++;
+       td->ts.io_u_map[index]++;
+       td->ts.total_io_u++;
 }
 
 static void io_u_mark_latency(struct thread_data *td, unsigned long msec)
@@ -321,7 +321,7 @@ static void io_u_mark_latency(struct thread_data *td, unsigned long msec)
                break;
        }
 
-       td->ts->io_u_lat[index]++;
+       td->ts.io_u_lat[index]++;
 }
 
 /*
diff --git a/stat.c b/stat.c
index 576e5d2..ccab0c7 100644 (file)
--- a/stat.c
+++ b/stat.c
@@ -6,6 +6,7 @@
 #include <dirent.h>
 #include <libgen.h>
 #include <math.h>
+#include <assert.h>
 
 #include "fio.h"
 
@@ -322,7 +323,7 @@ void disk_util_timer_arm(void)
 
 void update_rusage_stat(struct thread_data *td)
 {
-       struct thread_stat *ts = td->ts;
+       struct thread_stat *ts = &td->ts;
 
        getrusage(RUSAGE_SELF, &ts->ru_end);
 
@@ -412,29 +413,27 @@ static void show_disk_util(void)
        }
 }
 
-static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
+static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
                             int ddir)
 {
        const char *ddir_str[] = { "read ", "write" };
-       struct thread_stat *ts;
        unsigned long min, max;
        unsigned long long bw;
        double mean, dev;
        char *io_p, *bw_p;
 
-       if (!td->runtime[ddir])
+       if (!ts->runtime[ddir])
                return;
 
-       bw = td->io_bytes[ddir] / td->runtime[ddir];
-       io_p = num2str(td->io_bytes[ddir] >> 10, 6, 1);
+       bw = ts->io_bytes[ddir] / ts->runtime[ddir];
+       io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1);
        bw_p = num2str(bw, 6, 1);
 
-       fprintf(f_out, "  %s: io=%siB, bw=%siB/s, runt=%6lumsec\n", ddir_str[ddir], io_p, bw_p, td->runtime[ddir]);
+       fprintf(f_out, "  %s: io=%siB, bw=%siB/s, runt=%6lumsec\n", ddir_str[ddir], io_p, bw_p, ts->runtime[ddir]);
 
        free(io_p);
        free(bw_p);
 
-       ts = td->ts;
        if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
                fprintf(f_out, "    slat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
 
@@ -449,7 +448,7 @@ static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
        }
 }
 
-static void show_thread_status(struct thread_data *td,
+static void show_thread_status(struct thread_stat *ts,
                               struct group_run_stats *rs)
 {
        double usr_cpu, sys_cpu;
@@ -458,37 +457,37 @@ static void show_thread_status(struct thread_data *td,
        double io_u_lat[FIO_IO_U_LAT_NR];
        int i;
 
-       if (!(td->io_bytes[0] + td->io_bytes[1]))
+       if (!(ts->io_bytes[0] + ts->io_bytes[1]))
                return;
 
-       if (!td->error)
-               fprintf(f_out, "%s: (groupid=%d): err=%2d: pid=%d\n",td->name, td->groupid, td->error, td->pid);
+       if (!ts->error)
+               fprintf(f_out, "%s: (groupid=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->error, ts->pid);
        else
-               fprintf(f_out, "%s: (groupid=%d): err=%2d (%s): pid=%d\n",td->name, td->groupid, td->error, td->verror, td->pid);
+               fprintf(f_out, "%s: (groupid=%d): err=%2d (%s): pid=%d\n", ts->name, ts->groupid, ts->error, ts->verror, ts->pid);
 
-       if (td_read(td))
-               show_ddir_status(td, rs, DDIR_READ);
-       if (td_write(td))
-               show_ddir_status(td, rs, DDIR_WRITE);
+       if (ts->io_bytes[DDIR_READ])
+               show_ddir_status(rs, ts, DDIR_READ);
+       if (ts->io_bytes[DDIR_WRITE])
+               show_ddir_status(rs, ts, DDIR_WRITE);
 
-       runtime = mtime_since(&td->epoch, &td->end_time);
+       runtime = ts->total_run_time;
        if (runtime) {
                double runt = (double) runtime;
 
-               usr_cpu = (double) td->ts->usr_time * 100 / runt;
-               sys_cpu = (double) td->ts->sys_time * 100 / runt;
+               usr_cpu = (double) ts->usr_time * 100 / runt;
+               sys_cpu = (double) ts->sys_time * 100 / runt;
        } else {
                usr_cpu = 0;
                sys_cpu = 0;
        }
 
-       fprintf(f_out, "  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, td->ts->ctx);
+       fprintf(f_out, "  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, ts->ctx);
 
        /*
         * Do depth distribution calculations
         */
        for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
-               io_u_dist[i] = (double) td->ts->io_u_map[i] / (double) td->ts->total_io_u;
+               io_u_dist[i] = (double) ts->io_u_map[i] / (double) ts->total_io_u;
                io_u_dist[i] *= 100.0;
        }
 
@@ -498,30 +497,29 @@ static void show_thread_status(struct thread_data *td,
         * Do latency distribution calculations
         */
        for (i = 0; i < FIO_IO_U_LAT_NR; i++) {
-               io_u_lat[i] = (double) td->ts->io_u_lat[i] / (double) td->ts->total_io_u;
+               io_u_lat[i] = (double) ts->io_u_lat[i] / (double) ts->total_io_u;
                io_u_lat[i] *= 100.0;
        }
 
        fprintf(f_out, "     lat (msec): 2=%3.1f%%, 4=%3.1f%%, 10=%3.1f%%, 20=%3.1f%%, 50=%3.1f%%, 100=%3.1f%%\n", io_u_lat[0], io_u_lat[1], io_u_lat[2], io_u_lat[3], io_u_lat[4], io_u_lat[5]);
        fprintf(f_out, "     lat (msec): 250=%3.1f%%, 500=%3.1f%%, 750=%3.1f%%, 1000=%3.1f%%, >=2000=%3.1f%%\n", io_u_lat[6], io_u_lat[7], io_u_lat[8], io_u_lat[9], io_u_lat[10]);
 
-       if (td->description)
-               fprintf(f_out, "%s\n", td->description);
+       if (ts->description)
+               fprintf(f_out, "%s\n", ts->description);
 }
 
-static void show_ddir_status_terse(struct thread_data *td,
+static void show_ddir_status_terse(struct thread_stat *ts,
                                   struct group_run_stats *rs, int ddir)
 {
-       struct thread_stat *ts = td->ts;
        unsigned long min, max;
        unsigned long long bw;
        double mean, dev;
 
        bw = 0;
-       if (td->runtime[ddir])
-               bw = td->io_bytes[ddir] / td->runtime[ddir];
+       if (ts->runtime[ddir])
+               bw = ts->io_bytes[ddir] / ts->runtime[ddir];
 
-       fprintf(f_out, ",%llu,%llu,%lu", td->io_bytes[ddir] >> 10, bw, td->runtime[ddir]);
+       fprintf(f_out, ",%llu,%llu,%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
 
        if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
                fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev);
@@ -540,38 +538,68 @@ static void show_ddir_status_terse(struct thread_data *td,
                fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", min, max, p_of_agg, mean, dev);
        } else
                fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", 0UL, 0UL, 0.0, 0.0, 0.0);
-               
 }
 
 
-static void show_thread_status_terse(struct thread_data *td,
+static void show_thread_status_terse(struct thread_stat *ts,
                                     struct group_run_stats *rs)
 {
        double usr_cpu, sys_cpu;
 
-       fprintf(f_out, "%s,%d,%d",td->name, td->groupid, td->error);
+       fprintf(f_out, "%s,%d,%d", ts->name, ts->groupid, ts->error);
 
-       show_ddir_status_terse(td, rs, 0);
-       show_ddir_status_terse(td, rs, 1);
+       show_ddir_status_terse(ts, rs, 0);
+       show_ddir_status_terse(ts, rs, 1);
 
-       if (td->runtime[0] + td->runtime[1]) {
-               double runt = (double) (td->runtime[0] + td->runtime[1]);
+       if (ts->total_run_time) {
+               double runt = (double) ts->total_run_time;
 
-               usr_cpu = (double) td->ts->usr_time * 100 / runt;
-               sys_cpu = (double) td->ts->sys_time * 100 / runt;
+               usr_cpu = (double) ts->usr_time * 100 / runt;
+               sys_cpu = (double) ts->sys_time * 100 / runt;
        } else {
                usr_cpu = 0;
                sys_cpu = 0;
        }
 
-       fprintf(f_out, ",%f%%,%f%%,%lu\n", usr_cpu, sys_cpu, td->ts->ctx);
+       fprintf(f_out, ",%f%%,%f%%,%lu\n", usr_cpu, sys_cpu, ts->ctx);
+}
+
+static void __sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
+{
+       double mean, S;
+
+       dst->min_val = min(dst->min_val, src->min_val);
+       dst->max_val = max(dst->max_val, src->max_val);
+       dst->samples += src->samples;
+
+       /*
+        * Needs a new method for calculating stddev, we cannot just
+        * average them we do below for nr > 1
+        */
+       if (nr == 1) {
+               mean = src->mean;
+               S = src->S;
+       } else {
+               mean = ((src->mean * (double) nr) + dst->mean) / ((double) nr + 1.0);
+               S = ((src->S * (double) nr) + dst->S) / ((double) nr + 1.0);
+       }
+
+       dst->mean = mean;
+       dst->S = S;
+}
+
+static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
+{
+       __sum_stat(&dst[DDIR_READ], &src[DDIR_READ], nr);
+       __sum_stat(&dst[DDIR_WRITE], &src[DDIR_WRITE], nr);
 }
 
 void show_run_stats(void)
 {
        struct group_run_stats *runstats, *rs;
        struct thread_data *td;
-       int i;
+       struct thread_stat *threadstats, *ts;
+       int i, j, k, nr_ts, last_ts, members;
 
        runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 
@@ -583,25 +611,118 @@ void show_run_stats(void)
                rs->min_bw[1] = rs->min_run[1] = ~0UL;
        }
 
+       /*
+        * find out how many threads stats we need. if group reporting isn't
+        * enabled, it's one-per-td.
+        */
+       nr_ts = 0;
+       last_ts = -1;
+       for_each_td(td, i) {
+               if (!td->group_reporting) {
+                       nr_ts++;
+                       continue;
+               }
+               if (last_ts == td->groupid)
+                       continue;
+
+               last_ts = td->groupid;
+               nr_ts++;
+       }
+
+       threadstats = malloc(nr_ts * sizeof(struct thread_stat));
+
+       for (i = 0; i < nr_ts; i++) {
+               ts = &threadstats[i];
+
+               memset(ts, 0, sizeof(*ts));
+               ts->clat_stat[0].min_val = -1UL;
+               ts->clat_stat[1].min_val = -1UL;
+               ts->slat_stat[0].min_val = -1UL;
+               ts->slat_stat[1].min_val = -1UL;
+               ts->bw_stat[0].min_val = -1UL;
+               ts->bw_stat[1].min_val = -1UL;
+       }
+
+       j = 0;
+       last_ts = -1;
+       members = 0;
        for_each_td(td, i) {
+               ts = &threadstats[j];
+
+               members++;
+
+               if (!ts->groupid) {
+                       ts->name = td->name;
+                       ts->description = td->description;
+                       ts->error = td->error;
+                       ts->groupid = td->groupid;
+                       ts->pid = td->pid;
+                       ts->verror = td->verror;
+               }
+
+               sum_stat(ts->clat_stat, td->ts.clat_stat, members);
+               sum_stat(ts->slat_stat, td->ts.slat_stat, members);
+               sum_stat(ts->bw_stat, td->ts.bw_stat, members);
+
+               ts->stat_io_bytes[0] += td->ts.stat_io_bytes[0];
+               ts->stat_io_bytes[1] += td->ts.stat_io_bytes[1];
+
+               ts->usr_time += td->ts.usr_time;
+               ts->sys_time += td->ts.sys_time;
+               ts->ctx += td->ts.ctx;
+
+               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_LAT_NR; k++)
+                       ts->io_u_lat[k] += td->ts.io_u_lat[k];
+
+               ts->total_io_u += td->ts.total_io_u;
+               ts->io_bytes[0] += td->ts.io_bytes[0];
+               ts->io_bytes[1] += td->ts.io_bytes[1];
+
+               if (ts->runtime[0] < td->ts.runtime[0])
+                       ts->runtime[0] = td->ts.runtime[0];
+               if (ts->runtime[1] < td->ts.runtime[1])
+                       ts->runtime[1] = td->ts.runtime[1];
+
+               ts->total_run_time += td->ts.total_run_time;
+
+               if (!td->group_reporting) {
+                       members = 0;
+                       j++;
+                       continue;
+               }
+               if (last_ts == td->groupid)
+                       continue;
+
+               if (last_ts != -1) {
+                       members = 0;
+                       j++;
+               }
+
+               last_ts = td->groupid;
+       }
+
+       for (i = 0; i < nr_ts; i++) {
                unsigned long long rbw, wbw;
 
-               rs = &runstats[td->groupid];
+               ts = &threadstats[i];
+               rs = &runstats[ts->groupid];
 
-               if (td->runtime[0] < rs->min_run[0] || !rs->min_run[0])
-                       rs->min_run[0] = td->runtime[0];
-               if (td->runtime[0] > rs->max_run[0])
-                       rs->max_run[0] = td->runtime[0];
-               if (td->runtime[1] < rs->min_run[1] || !rs->min_run[1])
-                       rs->min_run[1] = td->runtime[1];
-               if (td->runtime[1] > rs->max_run[1])
-                       rs->max_run[1] = td->runtime[1];
+               if (ts->runtime[0] < rs->min_run[0] || !rs->min_run[0])
+                       rs->min_run[0] = ts->runtime[0];
+               if (ts->runtime[0] > rs->max_run[0])
+                       rs->max_run[0] = ts->runtime[0];
+               if (ts->runtime[1] < rs->min_run[1] || !rs->min_run[1])
+                       rs->min_run[1] = ts->runtime[1];
+               if (ts->runtime[1] > rs->max_run[1])
+                       rs->max_run[1] = ts->runtime[1];
 
                rbw = wbw = 0;
-               if (td->runtime[0])
-                       rbw = td->io_bytes[0] / (unsigned long long) td->runtime[0];
-               if (td->runtime[1])
-                       wbw = td->io_bytes[1] / (unsigned long long) td->runtime[1];
+               if (ts->runtime[0])
+                       rbw = td->io_bytes[0] / (unsigned long long) ts->runtime[0];
+               if (ts->runtime[1])
+                       wbw = td->io_bytes[1] / (unsigned long long) ts->runtime[1];
 
                if (rbw < rs->min_bw[0])
                        rs->min_bw[0] = rbw;
@@ -612,8 +733,8 @@ void show_run_stats(void)
                if (wbw > rs->max_bw[1])
                        rs->max_bw[1] = wbw;
 
-               rs->io_kb[0] += td->io_bytes[0] >> 10;
-               rs->io_kb[1] += td->io_bytes[1] >> 10;
+               rs->io_kb[0] += ts->io_bytes[0] >> 10;
+               rs->io_kb[1] += ts->io_bytes[1] >> 10;
        }
 
        for (i = 0; i < groupid + 1; i++) {
@@ -631,13 +752,14 @@ void show_run_stats(void)
        if (!terse_output)
                printf("\n");
 
-       for_each_td(td, i) {
-               rs = &runstats[td->groupid];
+       for (i = 0; i < nr_ts; i++) {
+               ts = &threadstats[i];
+               rs = &runstats[ts->groupid];
 
                if (terse_output)
-                       show_thread_status_terse(td, rs);
+                       show_thread_status_terse(ts, rs);
                else
-                       show_thread_status(td, rs);
+                       show_thread_status(ts, rs);
        }
 
        if (!terse_output) {
@@ -648,6 +770,7 @@ void show_run_stats(void)
        }
 
        free(runstats);
+       free(threadstats);
 }
 
 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
@@ -700,7 +823,7 @@ void add_agg_sample(unsigned long val, enum fio_ddir ddir)
 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
                     unsigned long msec)
 {
-       struct thread_stat *ts = td->ts;
+       struct thread_stat *ts = &td->ts;
 
        add_stat_sample(&ts->clat_stat[ddir], msec);
 
@@ -711,7 +834,7 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
                     unsigned long msec)
 {
-       struct thread_stat *ts = td->ts;
+       struct thread_stat *ts = &td->ts;
 
        add_stat_sample(&ts->slat_stat[ddir], msec);
 
@@ -722,7 +845,7 @@ void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
                   struct timeval *t)
 {
-       struct thread_stat *ts = td->ts;
+       struct thread_stat *ts = &td->ts;
        unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
        unsigned long rate;