Enable preadv2/pwritev2 engines by default on Linux

[fio.git] / stat.c

diff --git a/stat.c b/stat.c
index b42e886c32aeff16aca4ca3892509b192e1aa021..53848843860011441ed60c199e17437199545a6c 100644 (file)
--- a/stat.c
+++ b/stat.c
@@ -1636,16 +1636,21 @@ void __show_run_stats(void)
        if (output_format & FIO_OUTPUT_JSON) {
                struct thread_data *global;
                char time_buf[32];
-               time_t time_p;
+               struct timeval now;
+               unsigned long long ms_since_epoch;
 
-               time(&time_p);
-               os_ctime_r((const time_t *) &time_p, time_buf,
+               gettimeofday(&now, NULL);
+               ms_since_epoch = (unsigned long long)(now.tv_sec) * 1000 +
+                                (unsigned long long)(now.tv_usec) / 1000;
+
+               os_ctime_r((const time_t *) &now.tv_sec, time_buf,
                                sizeof(time_buf));
                time_buf[strlen(time_buf) - 1] = '\0';
 
                root = json_create_object();
                json_object_add_value_string(root, "fio version", fio_version_string);
-               json_object_add_value_int(root, "timestamp", time_p);
+               json_object_add_value_int(root, "timestamp", now.tv_sec);
+               json_object_add_value_int(root, "timestamp_ms", ms_since_epoch);
                json_object_add_value_string(root, "time", time_buf);
                global = get_global_options();
                json_add_job_opts(root, "global options", &global->opt_list, false);
@@ -1870,15 +1875,7 @@ static struct io_logs *get_new_log(struct io_log *iolog)
                        new_samples = MAX_LOG_ENTRIES;
        }
 
-       /*
-        * If the alloc size is sufficiently large, quiesce pending IO before
-        * attempting it. This is to avoid spending a long time in alloc with
-        * IO pending, which will unfairly skew the completion latencies of
-        * inflight IO.
-        */
        new_size = new_samples * log_entry_sz(iolog);
-       if (new_size >= LOG_QUIESCE_SZ)
-               io_u_quiesce(iolog->td);
 
        cur_log = malloc(sizeof(*cur_log));
        if (cur_log) {
@@ -1897,9 +1894,16 @@ static struct io_logs *get_new_log(struct io_log *iolog)
        return NULL;
 }
 
-static struct io_logs *get_cur_log(struct io_log *iolog)
+/*
+ * Add and return a new log chunk, or return current log if big enough
+ */
+static struct io_logs *regrow_log(struct io_log *iolog)
 {
        struct io_logs *cur_log;
+       int i;
+
+       if (!iolog || iolog->disabled)
+               goto disable;
 
        cur_log = iolog_cur_log(iolog);
        if (!cur_log) {
@@ -1931,7 +1935,63 @@ static struct io_logs *get_cur_log(struct io_log *iolog)
                return NULL;
        }
 
+       if (!iolog->pending || !iolog->pending->nr_samples)
+               return cur_log;
+
+       /*
+        * Flush pending items to new log
+        */
+       for (i = 0; i < iolog->pending->nr_samples; i++) {
+               struct io_sample *src, *dst;
+
+               src = get_sample(iolog, iolog->pending, i);
+               dst = get_sample(iolog, cur_log, i);
+               memcpy(dst, src, log_entry_sz(iolog));
+       }
+
+       iolog->pending->nr_samples = 0;
        return cur_log;
+disable:
+       if (iolog)
+               iolog->disabled = true;
+       return NULL;
+}
+
+void regrow_logs(struct thread_data *td)
+{
+       regrow_log(td->slat_log);
+       regrow_log(td->clat_log);
+       regrow_log(td->lat_log);
+       regrow_log(td->bw_log);
+       regrow_log(td->iops_log);
+       td->flags &= ~TD_F_REGROW_LOGS;
+}
+
+static struct io_logs *get_cur_log(struct io_log *iolog)
+{
+       struct io_logs *cur_log;
+
+       cur_log = iolog_cur_log(iolog);
+       if (!cur_log) {
+               cur_log = get_new_log(iolog);
+               if (!cur_log)
+                       return NULL;
+       }
+
+       if (cur_log->nr_samples < cur_log->max_samples)
+               return cur_log;
+
+       /*
+        * Out of space. If we're in IO offload mode, add a new log chunk
+        * inline. If we're doing inline submissions, flag 'td' as needing
+        * a log regrow and we'll take care of it on the submission side.
+        */
+       if (iolog->td->o.io_submit_mode == IO_MODE_OFFLOAD)
+               return regrow_log(iolog);
+
+       iolog->td->flags |= TD_F_REGROW_LOGS;
+       assert(iolog->pending->nr_samples < iolog->pending->max_samples);
+       return iolog->pending;
 }
 
 static void __add_log_sample(struct io_log *iolog, unsigned long val,