struct flist_head io_logs;
uint32_t cur_log_max;
+ /*
+ * When the current log runs out of space, store events here until
+ * we have a chance to regrow
+ */
+ struct io_logs *pending;
+
unsigned int log_ddir_mask;
char *filename;
struct io_logs *iolog_cur_log(struct io_log *);
uint64_t iolog_nr_samples(struct io_log *);
+void regrow_logs(struct thread_data *);
static inline struct io_sample *get_sample(struct io_log *iolog,
struct io_logs *cur_log,
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;
- cur_log = iolog_cur_log(iolog);
- if (!cur_log) {
- cur_log = get_new_log(iolog);
- if (!cur_log)
- return NULL;
- }
+ if (!iolog || iolog->disabled)
+ return NULL;
+ cur_log = iolog_cur_log(iolog);
if (cur_log->nr_samples < cur_log->max_samples)
return cur_log;
* Get a new log array, and add to our list
*/
cur_log = get_new_log(iolog);
- if (cur_log)
+ if (!cur_log) {
+ log_err("fio: failed extending iolog! Will stop logging.\n");
+ return NULL;
+ }
+
+ if (!iolog->pending || !iolog->pending->nr_samples)
return cur_log;
- log_err("fio: failed extending iolog! Will stop logging.\n");
- return NULL;
+ /*
+ * 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;
+}
+
+void regrow_logs(struct thread_data *td)
+{
+ if (!regrow_log(td->slat_log))
+ td->slat_log->disabled = true;
+ if (!regrow_log(td->clat_log))
+ td->clat_log->disabled = true;
+ if (!regrow_log(td->lat_log))
+ td->lat_log->disabled = true;
+ if (!regrow_log(td->bw_log))
+ td->bw_log->disabled = true;
+ if (!regrow_log(td->iops_log))
+ td->iops_log->disabled = true;
+
+ 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,