X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=iolog.h;h=011179a020ccd05830be26ca1d82053417623f32;hp=2c9b2b29cc7c5e6527ac3a251aa99a9394df59dd;hb=0c13c9699c668990a18261141bab612598bc47d5;hpb=cb7e0ace739cbd5ca8a434a40fef4de469d59a5e

diff --git a/iolog.h b/iolog.h
index 2c9b2b29..011179a0 100644
--- a/iolog.h
+++ b/iolog.h
@@ -18,13 +18,18 @@ struct io_stat {
 	fio_fp64_t S;
 };
 
+struct io_hist {
+	uint64_t samples;
+	unsigned long hist_last;
+};
+
 /*
  * A single data sample
  */
 struct io_sample {
 	uint64_t time;
 	uint64_t val;
-	uint32_t ddir;
+	uint32_t __ddir;
 	uint32_t bs;
 };
 
@@ -39,6 +44,17 @@ enum {
 	IO_LOG_TYPE_SLAT,
 	IO_LOG_TYPE_BW,
 	IO_LOG_TYPE_IOPS,
+	IO_LOG_TYPE_HIST,
+};
+
+#define DEF_LOG_ENTRIES		1024
+#define MAX_LOG_ENTRIES		(1024 * DEF_LOG_ENTRIES)
+
+struct io_logs {
+	struct flist_head list;
+	uint64_t nr_samples;
+	uint64_t max_samples;
+	void *log;
 };
 
 /*
@@ -48,24 +64,43 @@ struct io_log {
 	/*
 	 * Entries already logged
 	 */
-	uint64_t nr_samples;
-	uint64_t max_samples;
-	void *log;
+	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 thread_data *td;
+
 	unsigned int log_type;
 
 	/*
 	 * If we fail extending the log, stop collecting more entries.
 	 */
-	unsigned int disabled;
+	bool disabled;
 
 	/*
 	 * Log offsets
 	 */
 	unsigned int log_offset;
 
+	/*
+	 * Max size of log entries before a chunk is compressed
+	 */
+	unsigned int log_gz;
+
+	/*
+	 * Don't deflate for storing, just store the compressed bits
+	 */
+	unsigned int log_gz_store;
+
 	/*
 	 * Windowed average, for logging single entries average over some
 	 * period of time.
@@ -73,8 +108,33 @@ struct io_log {
 	struct io_stat avg_window[DDIR_RWDIR_CNT];
 	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;
 };
 
+/*
+ * If the upper bit is set, then we have the offset as well
+ */
+#define LOG_OFFSET_SAMPLE_BIT	0x80000000U
+#define io_sample_ddir(io)	((io)->__ddir & ~LOG_OFFSET_SAMPLE_BIT)
+
+static inline void io_sample_set_ddir(struct io_log *log,
+				      struct io_sample *io,
+				      enum fio_ddir ddir)
+{
+	io->__ddir = ddir | log->log_ddir_mask;
+}
+
 static inline size_t __log_entry_sz(int log_offset)
 {
 	if (log_offset)
@@ -91,13 +151,19 @@ static inline size_t log_entry_sz(struct io_log *log)
 static inline struct io_sample *__get_sample(void *samples, int log_offset,
 					     uint64_t sample)
 {
-	return samples + sample * __log_entry_sz(log_offset);
+	uint64_t sample_offset = sample * __log_entry_sz(log_offset);
+	return (struct io_sample *) ((char *) samples + sample_offset);
 }
 
+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,
 					   uint64_t sample)
 {
-	return __get_sample(iolog->log, iolog->log_offset, sample);
+	return __get_sample(cur_log->log, iolog->log_offset, sample);
 }
 
 enum {
@@ -143,38 +209,58 @@ enum file_log_act {
 
 struct io_u;
 extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
-extern void log_io_u(struct thread_data *, struct io_u *);
+extern void log_io_u(const struct thread_data *, const struct io_u *);
 extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
 extern int __must_check init_iolog(struct thread_data *td);
 extern void log_io_piece(struct thread_data *, struct io_u *);
 extern void unlog_io_piece(struct thread_data *, struct io_u *);
-extern void trim_io_piece(struct thread_data *, struct io_u *);
+extern void trim_io_piece(struct thread_data *, const struct io_u *);
 extern void queue_io_piece(struct thread_data *, struct io_piece *);
 extern void prune_io_piece_log(struct thread_data *);
 extern void write_iolog_close(struct thread_data *);
+extern int iolog_compress_init(struct thread_data *, struct sk_out *);
+extern void iolog_compress_exit(struct thread_data *);
+extern size_t log_chunk_sizes(struct io_log *);
+
+#ifdef CONFIG_ZLIB
+extern int iolog_file_inflate(const char *);
+#endif
 
 /*
  * Logging
  */
-extern void finalize_logs(struct thread_data *td);
-extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long,
-				unsigned int, uint64_t);
-extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long,
-				unsigned int, uint64_t);
-extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long,
-				unsigned int, uint64_t);
-extern void add_bw_sample(struct thread_data *, enum fio_ddir, unsigned int,
-				struct timeval *);
-extern void add_iops_sample(struct thread_data *, enum fio_ddir, unsigned int,
-				struct timeval *);
-extern void init_disk_util(struct thread_data *);
-extern void update_rusage_stat(struct thread_data *);
-extern void setup_log(struct io_log **, unsigned long, int, int, const char *);
-extern void __finish_log(struct io_log *);
-extern struct io_log *agg_io_log[DDIR_RWDIR_CNT];
-extern int write_bw_log;
-extern void add_agg_sample(unsigned long, enum fio_ddir, unsigned int);
-extern void fio_writeout_logs(struct thread_data *);
+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;
+	int log_gz_store;
+	int log_compress;
+};
+
+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);
+extern void flush_samples(FILE *, void *, uint64_t);
+extern void free_log(struct io_log *);
+extern void fio_writeout_logs(bool);
+extern void td_writeout_logs(struct thread_data *, bool);
+extern int iolog_cur_flush(struct io_log *, struct io_logs *);
 
 static inline void init_ipo(struct io_piece *ipo)
 {
@@ -182,4 +268,11 @@ static inline void init_ipo(struct io_piece *ipo)
 	INIT_FLIST_HEAD(&ipo->trim_list);
 }
 
+struct iolog_compress {
+	struct flist_head list;
+	void *buf;
+	size_t len;
+	unsigned int seq;
+};
+
 #endif