X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=iolog.h;h=981081f9a1b087cfbc6b82d25e2ffbdba5ec7b9e;hb=HEAD;hp=0da70670c796ef1e8685394d88bb455a843d917b;hpb=423671679fef3932894b58748d532f06cf0533b2;p=fio.git

diff --git a/iolog.h b/iolog.h
index 0da70670..e864d169 100644
--- a/iolog.h
+++ b/iolog.h
@@ -1,10 +1,12 @@
 #ifndef FIO_IOLOG_H
 #define FIO_IOLOG_H
 
+#include <stdio.h>
+
 #include "lib/rbtree.h"
 #include "lib/ieee754.h"
 #include "flist.h"
-#include "ioengine.h"
+#include "ioengines.h"
 
 /*
  * Use for maintaining statistics
@@ -18,19 +20,49 @@ struct io_stat {
 	fio_fp64_t S;
 };
 
+struct io_hist {
+	uint64_t samples;
+	unsigned long hist_last;
+	struct flist_head list;
+};
+
+enum {
+	IO_LOG_SAMPLE_AVG = 0,
+	IO_LOG_SAMPLE_MAX,
+	IO_LOG_SAMPLE_BOTH,
+};
+
+struct io_sample_value {
+	uint64_t val0;
+	uint64_t val1;
+};
+
+union io_sample_data {
+	struct io_sample_value val;
+	struct io_u_plat_entry *plat_entry;
+};
+
+#define sample_val(value) ((union io_sample_data) { .val.val0 = value })
+#define sample_plat(plat) ((union io_sample_data) { .plat_entry = plat })
+
 /*
  * A single data sample
  */
 struct io_sample {
 	uint64_t time;
-	uint64_t val;
+	union io_sample_data data;
 	uint32_t __ddir;
-	uint32_t bs;
+	uint16_t priority;
+	uint64_t bs;
+	uint64_t aux[];
 };
 
-struct io_sample_offset {
-	struct io_sample s;
-	uint64_t offset;
+/*
+ * Enumerate indexes of auxiliary log data in struct io_sample aux[] array
+ */
+enum {
+	IOS_AUX_OFFSET_INDEX,
+	IOS_AUX_ISSUE_TIME_INDEX,
 };
 
 enum {
@@ -39,6 +71,7 @@ enum {
 	IO_LOG_TYPE_SLAT,
 	IO_LOG_TYPE_BW,
 	IO_LOG_TYPE_IOPS,
+	IO_LOG_TYPE_HIST,
 };
 
 #define DEF_LOG_ENTRIES		1024
@@ -85,6 +118,16 @@ struct io_log {
 	 */
 	unsigned int log_offset;
 
+	/*
+	 * Log I/O priorities
+	 */
+	unsigned int log_prio;
+
+	/*
+	 * Log I/O issuing time
+	 */
+	unsigned int log_issue_time;
+
 	/*
 	 * Max size of log entries before a chunk is compressed
 	 */
@@ -101,18 +144,48 @@ struct io_log {
 	 */
 	struct io_stat avg_window[DDIR_RWDIR_CNT];
 	unsigned long avg_msec;
-	unsigned long avg_last;
+	unsigned long avg_last[DDIR_RWDIR_CNT];
+
+	/*
+	 * 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;
+	unsigned int hist_coarseness;
 
 	pthread_mutex_t chunk_lock;
 	unsigned int chunk_seq;
 	struct flist_head chunk_list;
+
+	pthread_mutex_t deferred_free_lock;
+#define IOLOG_MAX_DEFER	8
+	void *deferred_items[IOLOG_MAX_DEFER];
+	unsigned int deferred;
 };
 
 /*
  * 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)
+/*
+ * If the bit following the upper bit is set, then we have the priority
+ */
+#define LOG_PRIO_SAMPLE_BIT	0x40000000U
+/*
+ * If the bit following prioity sample vit is set, we report both avg and max
+ */
+#define LOG_AVG_MAX_SAMPLE_BIT	0x20000000U
+/*
+ * If the bit following AVG_MAX_SAMPLE_BIT is set, we report the issue time also
+ */
+#define LOG_ISSUE_TIME_SAMPLE_BIT	0x10000000U
+
+#define LOG_SAMPLE_BITS		(LOG_OFFSET_SAMPLE_BIT | LOG_PRIO_SAMPLE_BIT |\
+					LOG_AVG_MAX_SAMPLE_BIT |\
+					LOG_ISSUE_TIME_SAMPLE_BIT)
+#define io_sample_ddir(io)	((io)->__ddir & ~LOG_SAMPLE_BITS)
 
 static inline void io_sample_set_ddir(struct io_log *log,
 				      struct io_sample *io,
@@ -121,35 +194,49 @@ static inline void io_sample_set_ddir(struct io_log *log,
 	io->__ddir = ddir | log->log_ddir_mask;
 }
 
-static inline size_t __log_entry_sz(int log_offset)
+static inline size_t __log_entry_sz(bool log_offset, bool log_issue_time)
 {
+	size_t ret = sizeof(struct io_sample);
+
 	if (log_offset)
-		return sizeof(struct io_sample_offset);
-	else
-		return sizeof(struct io_sample);
+		ret += sizeof(uint64_t);
+
+	if (log_issue_time)
+		ret += sizeof(uint64_t);
+
+	return ret;
 }
 
 static inline size_t log_entry_sz(struct io_log *log)
 {
-	return __log_entry_sz(log->log_offset);
+	return __log_entry_sz(log->log_offset, log->log_issue_time);
 }
 
-static inline struct io_sample *__get_sample(void *samples, int log_offset,
+static inline size_t log_sample_sz(struct io_log *log, struct io_logs *cur_log)
+{
+	return cur_log->nr_samples * log_entry_sz(log);
+}
+
+static inline struct io_sample *__get_sample(void *samples, bool log_offset,
+					     bool log_issue_time,
 					     uint64_t sample)
 {
-	uint64_t sample_offset = sample * __log_entry_sz(log_offset);
+	uint64_t sample_offset = sample *
+		__log_entry_sz(log_offset, log_issue_time);
 	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 *);
+void regrow_agg_logs(void);
 
 static inline struct io_sample *get_sample(struct io_log *iolog,
 					   struct io_logs *cur_log,
 					   uint64_t sample)
 {
-	return __get_sample(cur_log->log, iolog->log_offset, sample);
+	return __get_sample(cur_log->log,
+			    iolog->log_offset, iolog->log_issue_time, sample);
 }
 
 enum {
@@ -164,7 +251,7 @@ enum {
  */
 struct io_piece {
 	union {
-		struct rb_node rb_node;
+		struct fio_rb_node rb_node;
 		struct flist_head list;
 	};
 	struct flist_head trim_list;
@@ -177,10 +264,8 @@ struct io_piece {
 	unsigned long len;
 	unsigned int flags;
 	enum fio_ddir ddir;
-	union {
-		unsigned long delay;
-		unsigned int file_action;
-	};
+	unsigned long delay;
+	unsigned int file_action;
 };
 
 /*
@@ -197,16 +282,20 @@ struct io_u;
 extern int __must_check read_iolog_get(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 bool __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 *, const struct io_u *);
+extern void trim_io_piece(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 *);
+int64_t iolog_items_to_fetch(struct thread_data *td);
 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 *);
+extern int init_io_u_buffers(struct thread_data *);
+extern unsigned long long delay_since_ttime(const struct thread_data *,
+					     unsigned long long);
 
 #ifdef CONFIG_ZLIB
 extern int iolog_file_inflate(const char *);
@@ -218,8 +307,12 @@ 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_prio;
+	int log_issue_time;
 	int log_gz;
 	int log_gz_store;
 	int log_compress;
@@ -227,13 +320,29 @@ struct log_params {
 
 static inline bool per_unit_log(struct io_log *log)
 {
-	return log && !log->avg_msec;
+	return log && (!log->avg_msec || log->log_gz || log->log_gz_store);
+}
+
+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;
+}
+
+static inline void ipo_bytes_align(unsigned int replay_align, struct io_piece *ipo)
+{
+	if (!replay_align)
+		return;
+
+	ipo->offset &= ~(replay_align - (uint64_t)1);
 }
 
 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 *, int);
+extern void flush_log(struct io_log *, bool);
 extern void flush_samples(FILE *, void *, uint64_t);
+extern uint64_t hist_sum(int, int, uint64_t *, uint64_t *);
 extern void free_log(struct io_log *);
 extern void fio_writeout_logs(bool);
 extern void td_writeout_logs(struct thread_data *, bool);
@@ -241,7 +350,7 @@ extern int iolog_cur_flush(struct io_log *, struct io_logs *);
 
 static inline void init_ipo(struct io_piece *ipo)
 {
-	memset(ipo, 0, sizeof(*ipo));
+	INIT_FLIST_HEAD(&ipo->list);
 	INIT_FLIST_HEAD(&ipo->trim_list);
 }