X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.h;h=c15232a214e6919cfae4e43b0ef452c8d5e52cc9;hp=df36f14e6e895d74d8712e7cdd77ca7f842f304c;hb=437c9b71527b14a8e872c03cd821179eba351474;hpb=56bb17f297c50b2832c845b0f6cdde5063748b34

diff --git a/fio.h b/fio.h
index df36f14e..c15232a2 100644
--- a/fio.h
+++ b/fio.h
@@ -24,26 +24,39 @@ enum fio_ddir {
 	DDIR_SYNC,
 };
 
+/*
+ * Use for maintaining statistics
+ */
 struct io_stat {
-	unsigned long val;
-	unsigned long val_sq;
 	unsigned long max_val;
 	unsigned long min_val;
 	unsigned long samples;
+
+	double mean;
+	double S;
 };
 
+/*
+ * A single data sample
+ */
 struct io_sample {
 	unsigned long time;
 	unsigned long val;
 	enum fio_ddir ddir;
 };
 
+/*
+ * Dynamically growing data sample log
+ */
 struct io_log {
 	unsigned long nr_samples;
 	unsigned long max_samples;
 	struct io_sample *log;
 };
 
+/*
+ * When logging io actions, this matches a single sent io_u
+ */
 struct io_piece {
 	struct list_head list;
 	struct fio_file *file;
@@ -70,10 +83,20 @@ struct io_u {
 	struct timeval start_time;
 	struct timeval issue_time;
 
+	/*
+	 * Allocated/set buffer and length
+	 */
 	void *buf;
 	unsigned int buflen;
 	unsigned long long offset;
 
+	/*
+	 * IO engine state, may be different from above when we get
+	 * partial transfers / residual data counts
+	 */
+	void *xfer_buf;
+	unsigned int xfer_buflen;
+
 	unsigned int resid;
 	unsigned int error;
 
@@ -95,11 +118,14 @@ struct io_u {
 #define FIO_HDR_MAGIC	0xf00baaef
 
 enum {
-	VERIFY_NONE = 0,
-	VERIFY_MD5,
-	VERIFY_CRC32,
+	VERIFY_NONE = 0,		/* no verification */
+	VERIFY_MD5,			/* md5 sum data blocks */
+	VERIFY_CRC32,			/* crc32 sum data blocks */
 };
 
+/*
+ * A header structure associated with each checksummed data block
+ */
 struct verify_header {
 	unsigned int fio_magic;
 	unsigned int len;
@@ -132,18 +158,24 @@ enum fio_memtype {
  * The type of object we are working on
  */
 enum fio_filetype {
-	FIO_TYPE_FILE = 1,
-	FIO_TYPE_BD,
-	FIO_TYPE_CHAR,
+	FIO_TYPE_FILE = 1,		/* plain file */
+	FIO_TYPE_BD,			/* block device */
+	FIO_TYPE_CHAR,			/* character device */
 };
 
 enum fio_ioengine_flags {
-	FIO_SYNCIO	= 1 << 0,
-	FIO_CPUIO	= 1 << 1,
-	FIO_MMAPIO	= 1 << 2,
-	FIO_RAWIO	= 1 << 3,
+	FIO_SYNCIO	= 1 << 0,	/* io engine has synchronous ->queue */
+	FIO_CPUIO	= 1 << 1,	/* cpu burner, doesn't do real io */
+	FIO_MMAPIO	= 1 << 2,	/* uses memory mapped io */
+	FIO_RAWIO	= 1 << 3,	/* some sort of direct/raw io */
+	FIO_NETIO	= 1 << 4,	/* networked io */
+	FIO_NULLIO	= 1 << 5,	/* no real data transfer (cpu/null) */
 };
 
+/*
+ * Each thread_data structure has a number of files associated with it,
+ * this structure holds state information for a single file.
+ */
 struct fio_file {
 	/*
 	 * A file may not be a file descriptor, let the io engine decide
@@ -160,16 +192,26 @@ struct fio_file {
 	unsigned long long last_pos;
 	unsigned long long last_completed_pos;
 
+	/*
+	 * block map for random io
+	 */
 	unsigned long *file_map;
 	unsigned int num_maps;
+	unsigned int last_free_lookup;
 
 	unsigned int unlink;
 };
 
+/*
+ * How many depth levels to log
+ */
+#define FIO_IO_U_MAP_NR	8
+
 /*
  * This describes a single thread/process executing a fio job.
  */
 struct thread_data {
+	char *description;
 	char *name;
 	char *directory;
 	char *filename;
@@ -217,6 +259,7 @@ struct thread_data {
 	unsigned int hugepage_size;
 	unsigned int rw_min_bs;
 	unsigned int thinktime;
+	unsigned int thinktime_blocks;
 	unsigned int fsync_blocks;
 	unsigned int start_delay;
 	unsigned long timeout;
@@ -226,8 +269,8 @@ struct thread_data {
 	unsigned long long zone_size;
 	unsigned long long zone_skip;
 	enum fio_memtype mem_type;
-	char *hugefile;
-	int hugefd;
+	char *mmapfile;
+	int mmapfd;
 	unsigned int stonewall;
 	unsigned int numjobs;
 	unsigned int iodepth;
@@ -262,6 +305,8 @@ struct thread_data {
 	 * Current IO depth and list of free and busy io_u's.
 	 */
 	unsigned int cur_depth;
+	unsigned int io_u_map[FIO_IO_U_MAP_NR];
+	unsigned long total_io_u;
 	struct list_head io_u_freelist;
 	struct list_head io_u_busylist;
 
@@ -392,6 +437,9 @@ static inline int should_fsync(struct thread_data *td)
 	return 0;
 }
 
+/*
+ * Disk utils as read in /sys/block/<dev>/stat
+ */
 struct disk_util_stat {
 	unsigned ios[2];
 	unsigned merges[2];
@@ -401,6 +449,9 @@ struct disk_util_stat {
 	unsigned time_in_queue;
 };
 
+/*
+ * Per-device disk util management
+ */
 struct disk_util {
 	struct list_head list;
 
@@ -415,6 +466,9 @@ struct disk_util {
 	struct timeval time;
 };
 
+/*
+ * Used for passing io_u completion data
+ */
 struct io_completion_data {
 	int nr;				/* input */
 
@@ -455,7 +509,11 @@ extern void update_io_ticks(void);
 extern void disk_util_timer_arm(void);
 extern void setup_log(struct io_log **);
 extern void finish_log(struct thread_data *, struct io_log *, const char *);
+extern void __finish_log(struct io_log *, const char *);
 extern int setup_rate(struct thread_data *);
+extern struct io_log *agg_io_log[2];
+extern int write_bw_log;
+extern void add_agg_sample(unsigned long, enum fio_ddir);
 
 /*
  * Time functions
@@ -612,4 +670,13 @@ extern void close_ioengine(struct thread_data *);
 #define for_each_file(td, f, i)	\
 	for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
 
+#define fio_assert(td, cond)	do {	\
+	if (!(cond)) {			\
+		fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond);	\
+		(td)->runstate = TD_EXITED;	\
+		(td)->error = EFAULT;		\
+		exit(0);			\
+	}	\
+} while (0)
+
 #endif