X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=iolog.h;h=011179a020ccd05830be26ca1d82053417623f32;hb=39f5379e9658470545e3b5f9577f4aee7e4f3f66;hp=a58e3f09376b843775f57428c8023c1fe31cb3e9;hpb=883e4841d5466955ad464ee3a6b37e009cfa80ef;p=fio.git

diff --git a/iolog.h b/iolog.h
index a58e3f09..011179a0 100644
--- a/iolog.h
+++ b/iolog.h
@@ -18,6 +18,11 @@ struct io_stat {
 	fio_fp64_t S;
 };
 
+struct io_hist {
+	uint64_t samples;
+	unsigned long hist_last;
+};
+
 /*
  * A single data sample
  */
@@ -39,6 +44,7 @@ enum {
 	IO_LOG_TYPE_SLAT,
 	IO_LOG_TYPE_BW,
 	IO_LOG_TYPE_IOPS,
+	IO_LOG_TYPE_HIST,
 };
 
 #define DEF_LOG_ENTRIES		1024
@@ -103,6 +109,14 @@ struct io_log {
 	unsigned long avg_msec;
 	unsigned long avg_last;
 
+  /*
+   * Windowed latency histograms, for keeping track of when we need to
+   * save a copy of the histogram every approximately hist_msec milliseconds.
+   */
+	struct io_hist hist_window[DDIR_RWDIR_CNT];
+	unsigned long hist_msec;
+	int hist_coarseness;
+
 	pthread_mutex_t chunk_lock;
 	unsigned int chunk_seq;
 	struct flist_head chunk_list;
@@ -218,6 +232,8 @@ extern int iolog_file_inflate(const char *);
 struct log_params {
 	struct thread_data *td;
 	unsigned long avg_msec;
+	unsigned long hist_msec;
+	int hist_coarseness;
 	int log_type;
 	int log_offset;
 	int log_gz;
@@ -230,6 +246,13 @@ static inline bool per_unit_log(struct io_log *log)
 	return log && !log->avg_msec;
 }
 
+static inline bool inline_log(struct io_log *log)
+{
+	return log->log_type == IO_LOG_TYPE_LAT ||
+		log->log_type == IO_LOG_TYPE_CLAT ||
+		log->log_type == IO_LOG_TYPE_SLAT;
+}
+
 extern void finalize_logs(struct thread_data *td, bool);
 extern void setup_log(struct io_log **, struct log_params *, const char *);
 extern void flush_log(struct io_log *, bool);