Allow random overwrite workloads to write io_limit
[fio.git] / backend.c
index e32d84165273cb5c71fc520d4926b2afd1708a18..3430e6612d4312740f31045d6ebf6ff4ff96950b 100644 (file)
--- a/backend.c
+++ b/backend.c
 #include "lib/getrusage.h"
 #include "idletime.h"
 #include "err.h"
-#include "tp.h"
+#include "lib/tp.h"
+
+static pthread_t helper_thread;
+static pthread_mutex_t helper_lock;
+pthread_cond_t helper_cond;
+int helper_do_stat = 0;
 
-static pthread_t disk_util_thread;
-static struct fio_mutex *disk_thread_mutex;
 static struct fio_mutex *startup_mutex;
 static struct flist_head *cgroup_list;
 static char *cgroup_mnt;
@@ -73,7 +76,7 @@ unsigned int stat_number = 0;
 int shm_id = 0;
 int temp_stall_ts;
 unsigned long done_secs = 0;
-volatile int disk_util_exit = 0;
+volatile int helper_exit = 0;
 
 #define PAGE_ALIGN(buf)        \
        (char *) (((uintptr_t) (buf) + page_mask) & ~page_mask)
@@ -87,7 +90,7 @@ static void sig_int(int sig)
                        fio_server_got_signal(sig);
                else {
                        log_info("\nfio: terminating on signal %d\n", sig);
-                       fflush(stdout);
+                       log_info_flush();
                        exit_value = 128;
                }
 
@@ -391,7 +394,7 @@ static int break_on_this_error(struct thread_data *td, enum fio_ddir ddir,
                         * fill_device option is set.
                         */
                        td_clear_error(td);
-                       td->terminate = 1;
+                       fio_mark_td_terminate(td);
                        return 1;
                } else {
                        /*
@@ -415,6 +418,34 @@ static void check_update_rusage(struct thread_data *td)
        }
 }
 
+static int wait_for_completions(struct thread_data *td, struct timeval *time,
+                               uint64_t *bytes_done)
+{
+       const int full = queue_full(td);
+       int min_evts = 0;
+       int ret;
+
+       /*
+        * if the queue is full, we MUST reap at least 1 event
+        */
+       min_evts = min(td->o.iodepth_batch_complete, td->cur_depth);
+       if (full && !min_evts)
+               min_evts = 1;
+
+       if (time && (__should_check_rate(td, DDIR_READ) ||
+           __should_check_rate(td, DDIR_WRITE) ||
+           __should_check_rate(td, DDIR_TRIM)))
+               fio_gettime(time, NULL);
+
+       do {
+               ret = io_u_queued_complete(td, min_evts, bytes_done);
+               if (ret < 0)
+                       break;
+       } while (full && (td->cur_depth > td->o.iodepth_low));
+
+       return ret;
+}
+
 /*
  * The main verify engine. Runs over the writes we previously submitted,
  * reads the blocks back in, and checks the crc/md5 of the data.
@@ -460,7 +491,7 @@ static void do_verify(struct thread_data *td, uint64_t verify_bytes)
                if (runtime_exceeded(td, &td->tv_cache)) {
                        __update_tv_cache(td);
                        if (runtime_exceeded(td, &td->tv_cache)) {
-                               td->terminate = 1;
+                               fio_mark_td_terminate(td);
                                break;
                        }
                }
@@ -523,12 +554,19 @@ static void do_verify(struct thread_data *td, uint64_t verify_bytes)
                                break;
                }
 
+               if (verify_state_should_stop(td, io_u)) {
+                       put_io_u(td, io_u);
+                       break;
+               }
+
                if (td->o.verify_async)
                        io_u->end_io = verify_io_u_async;
                else
                        io_u->end_io = verify_io_u;
 
                ddir = io_u->ddir;
+               if (!td->o.disable_slat)
+                       fio_gettime(&io_u->start_time, NULL);
 
                ret = td_io_queue(td, io_u);
                switch (ret) {
@@ -591,27 +629,9 @@ sync_done:
                 */
 reap:
                full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
-               if (full || !td->o.iodepth_batch_complete) {
-                       min_events = min(td->o.iodepth_batch_complete,
-                                        td->cur_depth);
-                       /*
-                        * if the queue is full, we MUST reap at least 1 event
-                        */
-                       if (full && !min_events)
-                               min_events = 1;
+               if (full || !td->o.iodepth_batch_complete)
+                       ret = wait_for_completions(td, NULL, bytes_done);
 
-                       do {
-                               /*
-                                * Reap required number of io units, if any,
-                                * and do the verification on them through
-                                * the callback handler
-                                */
-                               if (io_u_queued_complete(td, min_events, bytes_done) < 0) {
-                                       ret = -1;
-                                       break;
-                               }
-                       } while (full && (td->cur_depth > td->o.iodepth_low));
-               }
                if (ret < 0)
                        break;
        }
@@ -644,7 +664,28 @@ static unsigned int exceeds_number_ios(struct thread_data *td)
        return number_ios >= td->o.number_ios;
 }
 
-static int io_bytes_exceeded(struct thread_data *td)
+static int io_issue_bytes_exceeded(struct thread_data *td)
+{
+       unsigned long long bytes, limit;
+
+       if (td_rw(td))
+               bytes = td->io_issue_bytes[DDIR_READ] + td->io_issue_bytes[DDIR_WRITE];
+       else if (td_write(td))
+               bytes = td->io_issue_bytes[DDIR_WRITE];
+       else if (td_read(td))
+               bytes = td->io_issue_bytes[DDIR_READ];
+       else
+               bytes = td->io_issue_bytes[DDIR_TRIM];
+
+       if (td->o.io_limit)
+               limit = td->o.io_limit;
+       else
+               limit = td->o.size;
+
+       return bytes >= limit || exceeds_number_ios(td);
+}
+
+static int io_complete_bytes_exceeded(struct thread_data *td)
 {
        unsigned long long bytes, limit;
 
@@ -685,21 +726,26 @@ static uint64_t do_io(struct thread_data *td)
 
        lat_target_init(td);
 
+       total_bytes = td->o.size;
+       /*
+       * Allow random overwrite workloads to write up to io_limit
+       * before starting verification phase as 'size' doesn't apply.
+       */
+       if (td_write(td) && td_random(td) && td->o.norandommap)
+               total_bytes = max(total_bytes, (uint64_t) td->o.io_limit);
        /*
         * If verify_backlog is enabled, we'll run the verify in this
         * handler as well. For that case, we may need up to twice the
         * amount of bytes.
         */
-       total_bytes = td->o.size;
        if (td->o.verify != VERIFY_NONE &&
           (td_write(td) && td->o.verify_backlog))
                total_bytes += td->o.size;
 
        while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
-               (!flist_empty(&td->trim_list)) || !io_bytes_exceeded(td) ||
+               (!flist_empty(&td->trim_list)) || !io_issue_bytes_exceeded(td) ||
                td->o.time_based) {
                struct timeval comp_time;
-               int min_evts = 0;
                struct io_u *io_u;
                int ret2, full;
                enum fio_ddir ddir;
@@ -714,7 +760,7 @@ static uint64_t do_io(struct thread_data *td)
                if (runtime_exceeded(td, &td->tv_cache)) {
                        __update_tv_cache(td);
                        if (runtime_exceeded(td, &td->tv_cache)) {
-                               td->terminate = 1;
+                               fio_mark_td_terminate(td);
                                break;
                        }
                }
@@ -750,9 +796,14 @@ static uint64_t do_io(struct thread_data *td)
                    ((io_u->flags & IO_U_F_VER_LIST) || !td_rw(td))) {
 
                        if (!td->o.verify_pattern_bytes) {
-                               io_u->rand_seed = __rand(&td->__verify_state);
+                               io_u->rand_seed = __rand(&td->verify_state);
                                if (sizeof(int) != sizeof(long *))
-                                       io_u->rand_seed *= __rand(&td->__verify_state);
+                                       io_u->rand_seed *= __rand(&td->verify_state);
+                       }
+
+                       if (verify_state_should_stop(td, io_u)) {
+                               put_io_u(td, io_u);
+                               break;
                        }
 
                        if (td->o.verify_async)
@@ -858,28 +909,8 @@ sync_done:
                 */
 reap:
                full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
-               if (full || !td->o.iodepth_batch_complete) {
-                       min_evts = min(td->o.iodepth_batch_complete,
-                                       td->cur_depth);
-                       /*
-                        * if the queue is full, we MUST reap at least 1 event
-                        */
-                       if (full && !min_evts)
-                               min_evts = 1;
-
-                       if (__should_check_rate(td, DDIR_READ) ||
-                           __should_check_rate(td, DDIR_WRITE) ||
-                           __should_check_rate(td, DDIR_TRIM))
-                               fio_gettime(&comp_time, NULL);
-
-                       do {
-                               ret = io_u_queued_complete(td, min_evts, bytes_done);
-                               if (ret < 0)
-                                       break;
-
-                       } while (full && (td->cur_depth > td->o.iodepth_low));
-               }
-
+               if (full || !td->o.iodepth_batch_complete)
+                       ret = wait_for_completions(td, &comp_time, bytes_done);
                if (ret < 0)
                        break;
                if (!ddir_rw_sum(bytes_done) && !(td->io_ops->flags & FIO_NOIO))
@@ -922,7 +953,7 @@ reap:
 
        if (td->o.fill_device && td->error == ENOSPC) {
                td->error = 0;
-               td->terminate = 1;
+               fio_mark_td_terminate(td);
        }
        if (!td->error) {
                struct fio_file *f;
@@ -974,6 +1005,9 @@ static void cleanup_io_u(struct thread_data *td)
        io_u_rexit(&td->io_u_requeues);
        io_u_qexit(&td->io_u_freelist);
        io_u_qexit(&td->io_u_all);
+
+       if (td->last_write_comp)
+               sfree(td->last_write_comp);
 }
 
 static int init_io_u(struct thread_data *td)
@@ -1090,6 +1124,14 @@ static int init_io_u(struct thread_data *td)
                p += max_bs;
        }
 
+       if (td->o.verify != VERIFY_NONE) {
+               td->last_write_comp = scalloc(max_units, sizeof(uint64_t));
+               if (!td->last_write_comp) {
+                       log_err("fio: failed to alloc write comp data\n");
+                       return 1;
+               }
+       }
+
        return 0;
 }
 
@@ -1218,7 +1260,7 @@ static uint64_t do_dry_run(struct thread_data *td)
        td_set_runstate(td, TD_RUNNING);
 
        while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
-               (!flist_empty(&td->trim_list)) || !io_bytes_exceeded(td)) {
+               (!flist_empty(&td->trim_list)) || !io_complete_bytes_exceeded(td)) {
                struct io_u *io_u;
                int ret;
 
@@ -1321,7 +1363,7 @@ static void *thread_main(void *data)
         * Set affinity first, in case it has an impact on the memory
         * allocations.
         */
-       if (o->cpumask_set) {
+       if (fio_option_is_set(o, cpumask)) {
                if (o->cpus_allowed_policy == FIO_CPUS_SPLIT) {
                        ret = fio_cpus_split(&o->cpumask, td->thread_number - 1);
                        if (!ret) {
@@ -1340,16 +1382,16 @@ static void *thread_main(void *data)
 
 #ifdef CONFIG_LIBNUMA
        /* numa node setup */
-       if (o->numa_cpumask_set || o->numa_memmask_set) {
+       if (fio_option_is_set(o, numa_cpunodes) ||
+           fio_option_is_set(o, numa_memnodes)) {
                struct bitmask *mask;
-               int ret;
 
                if (numa_available() < 0) {
                        td_verror(td, errno, "Does not support NUMA API\n");
                        goto err;
                }
 
-               if (o->numa_cpumask_set) {
+               if (fio_option_is_set(o, numa_cpunodes)) {
                        mask = numa_parse_nodestring(o->numa_cpunodes);
                        ret = numa_run_on_node_mask(mask);
                        numa_free_nodemask(mask);
@@ -1360,8 +1402,7 @@ static void *thread_main(void *data)
                        }
                }
 
-               if (o->numa_memmask_set) {
-
+               if (fio_option_is_set(o, numa_memnodes)) {
                        mask = NULL;
                        if (o->numa_memnodes)
                                mask = numa_parse_nodestring(o->numa_memnodes);
@@ -1407,7 +1448,8 @@ static void *thread_main(void *data)
        if (o->verify_async && verify_async_init(td))
                goto err;
 
-       if (o->ioprio) {
+       if (fio_option_is_set(o, ioprio) ||
+           fio_option_is_set(o, ioprio_class)) {
                ret = ioprio_set(IOPRIO_WHO_PROCESS, 0, o->ioprio_class, o->ioprio);
                if (ret == -1) {
                        td_verror(td, errno, "ioprio_set");
@@ -1482,18 +1524,21 @@ static void *thread_main(void *data)
 
                clear_state = 1;
 
+               fio_mutex_down(stat_mutex);
                if (td_read(td) && td->io_bytes[DDIR_READ]) {
-                       elapsed = utime_since_now(&td->start);
+                       elapsed = mtime_since_now(&td->start);
                        td->ts.runtime[DDIR_READ] += elapsed;
                }
                if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
-                       elapsed = utime_since_now(&td->start);
+                       elapsed = mtime_since_now(&td->start);
                        td->ts.runtime[DDIR_WRITE] += elapsed;
                }
                if (td_trim(td) && td->io_bytes[DDIR_TRIM]) {
-                       elapsed = utime_since_now(&td->start);
+                       elapsed = mtime_since_now(&td->start);
                        td->ts.runtime[DDIR_TRIM] += elapsed;
                }
+               fio_gettime(&td->start, NULL);
+               fio_mutex_up(stat_mutex);
 
                if (td->error || td->terminate)
                        break;
@@ -1509,21 +1554,33 @@ static void *thread_main(void *data)
 
                do_verify(td, verify_bytes);
 
-               td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
+               fio_mutex_down(stat_mutex);
+               td->ts.runtime[DDIR_READ] += mtime_since_now(&td->start);
+               fio_gettime(&td->start, NULL);
+               fio_mutex_up(stat_mutex);
 
                if (td->error || td->terminate)
                        break;
        }
 
        update_rusage_stat(td);
-       td->ts.runtime[DDIR_READ] = (td->ts.runtime[DDIR_READ] + 999) / 1000;
-       td->ts.runtime[DDIR_WRITE] = (td->ts.runtime[DDIR_WRITE] + 999) / 1000;
-       td->ts.runtime[DDIR_TRIM] = (td->ts.runtime[DDIR_TRIM] + 999) / 1000;
        td->ts.total_run_time = mtime_since_now(&td->epoch);
        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];
 
+       if (td->o.verify_state_save && !(td->flags & TD_F_VSTATE_SAVED) &&
+           (td->o.verify != VERIFY_NONE && td_write(td))) {
+               struct all_io_list *state;
+               size_t sz;
+
+               state = get_all_io_list(td->thread_number, &sz);
+               if (state) {
+                       __verify_save_state(state, "local");
+                       free(state);
+               }
+       }
+
        fio_unpin_memory(td);
 
        fio_writeout_logs(td);
@@ -1549,11 +1606,12 @@ err:
        cleanup_io_u(td);
        close_ioengine(td);
        cgroup_shutdown(td, &cgroup_mnt);
+       verify_free_state(td);
 
-       if (o->cpumask_set) {
-               int ret = fio_cpuset_exit(&o->cpumask);
-
-               td_verror(td, ret, "fio_cpuset_exit");
+       if (fio_option_is_set(o, cpumask)) {
+               ret = fio_cpuset_exit(&o->cpumask);
+               if (ret)
+                       td_verror(td, ret, "fio_cpuset_exit");
        }
 
        /*
@@ -1562,13 +1620,17 @@ err:
        if (o->write_iolog_file)
                write_iolog_close(td);
 
-       fio_mutex_remove(td->rusage_sem);
-       td->rusage_sem = NULL;
-
        fio_mutex_remove(td->mutex);
        td->mutex = NULL;
 
        td_set_runstate(td, TD_EXITED);
+
+       /*
+        * Do this last after setting our runstate to exited, so we
+        * know that the stat thread is signaled.
+        */
+       check_update_rusage(td);
+
        return (void *) (uintptr_t) td->error;
 }
 
@@ -1603,6 +1665,13 @@ static int fork_main(int shmid, int offset)
        return (int) (uintptr_t) ret;
 }
 
+static void dump_td_info(struct thread_data *td)
+{
+       log_err("fio: job '%s' hasn't exited in %lu seconds, it appears to "
+               "be stuck. Doing forceful exit of this job.\n", td->o.name,
+                       (unsigned long) time_since_now(&td->terminate_time));
+}
+
 /*
  * Run over the job map and reap the threads that have exited, if any.
  */
@@ -1680,6 +1749,17 @@ static void reap_threads(unsigned int *nr_running, unsigned int *t_rate,
                        }
                }
 
+               /*
+                * If the job is stuck, do a forceful timeout of it and
+                * move on.
+                */
+               if (td->terminate &&
+                   time_since_now(&td->terminate_time) >= FIO_REAP_TIMEOUT) {
+                       dump_td_info(td);
+                       td_set_runstate(td, TD_REAPED);
+                       goto reaped;
+               }
+
                /*
                 * thread is not dead, continue
                 */
@@ -1703,9 +1783,80 @@ reaped:
                fio_terminate_threads(TERMINATE_ALL);
 }
 
+static int __check_trigger_file(void)
+{
+       struct stat sb;
+
+       if (!trigger_file)
+               return 0;
+
+       if (stat(trigger_file, &sb))
+               return 0;
+
+       if (unlink(trigger_file) < 0)
+               log_err("fio: failed to unlink %s: %s\n", trigger_file,
+                                                       strerror(errno));
+
+       return 1;
+}
+
+static int trigger_timedout(void)
+{
+       if (trigger_timeout)
+               return time_since_genesis() >= trigger_timeout;
+
+       return 0;
+}
+
+void exec_trigger(const char *cmd)
+{
+       int ret;
+
+       if (!cmd)
+               return;
+
+       ret = system(cmd);
+       if (ret == -1)
+               log_err("fio: failed executing %s trigger\n", cmd);
+}
+
+void check_trigger_file(void)
+{
+       if (__check_trigger_file() || trigger_timedout()) {
+               if (nr_clients)
+                       fio_clients_send_trigger(trigger_remote_cmd);
+               else {
+                       verify_save_state();
+                       fio_terminate_threads(TERMINATE_ALL);
+                       exec_trigger(trigger_cmd);
+               }
+       }
+}
+
+static int fio_verify_load_state(struct thread_data *td)
+{
+       int ret;
+
+       if (!td->o.verify_state)
+               return 0;
+
+       if (is_backend) {
+               void *data;
+
+               ret = fio_server_get_verify_state(td->o.name,
+                                       td->thread_number - 1, &data);
+               if (!ret)
+                       verify_convert_assign_state(td, data);
+       } else
+               ret = verify_load_state(td, "local");
+
+       return ret;
+}
+
 static void do_usleep(unsigned int usecs)
 {
        check_for_running_stats();
+       check_trigger_file();
        usleep(usecs);
 }
 
@@ -1745,7 +1896,7 @@ static void run_threads(void)
                                                nr_process > 1 ? "es" : "");
                }
                log_info("\n");
-               fflush(stdout);
+               log_info_flush();
        }
 
        todo = thread_number;
@@ -1759,12 +1910,16 @@ static void run_threads(void)
                if (!td->o.create_serialize)
                        continue;
 
+               if (fio_verify_load_state(td))
+                       goto reap;
+
                /*
                 * do file setup here so it happens sequentially,
                 * we don't want X number of threads getting their
                 * client data interspersed on disk
                 */
                if (setup_files(td)) {
+reap:
                        exit_value++;
                        if (td->error)
                                log_err("fio: pid=%d, err=%d/%s\n",
@@ -1952,57 +2107,71 @@ static void run_threads(void)
        update_io_ticks();
 }
 
-void wait_for_disk_thread_exit(void)
+static void wait_for_helper_thread_exit(void)
 {
-       fio_mutex_down(disk_thread_mutex);
+       void *ret;
+
+       helper_exit = 1;
+       pthread_cond_signal(&helper_cond);
+       pthread_join(helper_thread, &ret);
 }
 
 static void free_disk_util(void)
 {
-       disk_util_start_exit();
-       wait_for_disk_thread_exit();
        disk_util_prune_entries();
+
+       pthread_cond_destroy(&helper_cond);
 }
 
-static void *disk_thread_main(void *data)
+static void *helper_thread_main(void *data)
 {
        int ret = 0;
 
        fio_mutex_up(startup_mutex);
 
-       while (threads && !ret) {
-               usleep(DISK_UTIL_MSEC * 1000);
-               if (!threads)
-                       break;
+       while (!ret) {
+               uint64_t sec = DISK_UTIL_MSEC / 1000;
+               uint64_t nsec = (DISK_UTIL_MSEC % 1000) * 1000000;
+               struct timespec ts;
+               struct timeval tv;
+
+               gettimeofday(&tv, NULL);
+               ts.tv_sec = tv.tv_sec + sec;
+               ts.tv_nsec = (tv.tv_usec * 1000) + nsec;
+
+               if (ts.tv_nsec >= 1000000000ULL) {
+                       ts.tv_nsec -= 1000000000ULL;
+                       ts.tv_sec++;
+               }
+
+               pthread_cond_timedwait(&helper_cond, &helper_lock, &ts);
+
                ret = update_io_ticks();
 
+               if (helper_do_stat) {
+                       helper_do_stat = 0;
+                       __show_running_run_stats();
+               }
+
                if (!is_backend)
                        print_thread_status();
        }
 
-       fio_mutex_up(disk_thread_mutex);
        return NULL;
 }
 
-static int create_disk_util_thread(void)
+static int create_helper_thread(void)
 {
        int ret;
 
        setup_disk_util();
 
-       disk_thread_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
+       pthread_cond_init(&helper_cond, NULL);
+       pthread_mutex_init(&helper_lock, NULL);
 
-       ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
+       ret = pthread_create(&helper_thread, NULL, helper_thread_main, NULL);
        if (ret) {
-               fio_mutex_remove(disk_thread_mutex);
-               log_err("Can't create disk util thread: %s\n", strerror(ret));
-               return 1;
-       }
-
-       ret = pthread_detach(disk_util_thread);
-       if (ret) {
-               fio_mutex_remove(disk_thread_mutex);
-               log_err("Can't detatch disk util thread: %s\n", strerror(ret));
+               log_err("Can't create helper thread: %s\n", strerror(ret));
                return 1;
        }
 
@@ -2042,18 +2211,18 @@ int fio_backend(void)
 
        set_genesis_time();
        stat_init();
-       create_disk_util_thread();
+       create_helper_thread();
 
        cgroup_list = smalloc(sizeof(*cgroup_list));
        INIT_FLIST_HEAD(cgroup_list);
 
        run_threads();
 
+       wait_for_helper_thread_exit();
+
        if (!fio_abort) {
-               show_run_stats();
+               __show_run_stats();
                if (write_bw_log) {
-                       int i;
-
                        for (i = 0; i < DDIR_RWDIR_CNT; i++) {
                                struct io_log *log = agg_io_log[i];
 
@@ -2063,8 +2232,13 @@ int fio_backend(void)
                }
        }
 
-       for_each_td(td, i)
+       for_each_td(td, i) {
                fio_options_free(td);
+               if (td->rusage_sem) {
+                       fio_mutex_remove(td->rusage_sem);
+                       td->rusage_sem = NULL;
+               }
+       }
 
        free_disk_util();
        cgroup_kill(cgroup_list);
@@ -2072,7 +2246,6 @@ int fio_backend(void)
        sfree(cgroup_mnt);
 
        fio_mutex_remove(startup_mutex);
-       fio_mutex_remove(disk_thread_mutex);
        stat_exit();
        return exit_value;
 }