X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.h;h=12afa0651ae6e6800d7d316d09735a13178d88bf;hp=56ed248551a5f6158dedf99eb0e4033f2bf0bf2d;hb=5cc2da300b3fc30e00b79b4ddb3f372df3b2fe93;hpb=cec6b55da1c282b5b91ad346c7804171fccf151e

diff --git a/fio.h b/fio.h
index 56ed2485..12afa065 100644
--- a/fio.h
+++ b/fio.h
@@ -18,12 +18,19 @@
 #include "arch.h"
 #include "os.h"
 
+#ifdef FIO_HAVE_SYSLET
+#include "syslet.h"
+#endif
+
 enum fio_ddir {
 	DDIR_READ = 0,
 	DDIR_WRITE,
 	DDIR_SYNC,
 };
 
+/*
+ * Use for maintaining statistics
+ */
 struct io_stat {
 	unsigned long max_val;
 	unsigned long min_val;
@@ -33,26 +40,42 @@ struct io_stat {
 	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;
 	unsigned long long offset;
-	unsigned int len;
+	unsigned long len;
 	enum fio_ddir ddir;
 };
 
+#ifdef FIO_HAVE_SYSLET
+struct syslet_req {
+	struct syslet_uatom atom;
+	long ret;
+};
+#endif
+
 /*
  * The io unit
  */
@@ -66,17 +89,27 @@ struct io_u {
 #endif
 #ifdef FIO_HAVE_SGIO
 		struct sg_io_hdr hdr;
+#endif
+#ifdef FIO_HAVE_SYSLET
+		struct syslet_req req;
 #endif
 	};
 	struct timeval start_time;
 	struct timeval issue_time;
 
+	/*
+	 * Allocated/set buffer and length
+	 */
 	void *buf;
-	unsigned int buflen;
+	unsigned long 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 long xfer_buflen;
 
 	unsigned int resid;
 	unsigned int error;
@@ -96,14 +129,26 @@ struct io_u {
 	struct list_head list;
 };
 
+/*
+ * io_ops->queue() return values
+ */
+enum {
+	FIO_Q_COMPLETED	= 0,		/* completed sync */
+	FIO_Q_QUEUED	= 1,		/* queued, will complete async */
+	FIO_Q_BUSY	= 2,		/* no more room, call ->commit() */
+};
+
 #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;
@@ -136,19 +181,24 @@ 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_NETIO	= 1 << 4,
+	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
@@ -165,8 +215,12 @@ 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;
 };
@@ -175,6 +229,7 @@ struct fio_file {
  * How many depth levels to log
  */
 #define FIO_IO_U_MAP_NR	8
+#define FIO_IO_U_LAT_NR 12
 
 /*
  * This describes a single thread/process executing a fio job.
@@ -228,6 +283,7 @@ struct thread_data {
 	unsigned int hugepage_size;
 	unsigned int rw_min_bs;
 	unsigned int thinktime;
+	unsigned int thinktime_spin;
 	unsigned int thinktime_blocks;
 	unsigned int fsync_blocks;
 	unsigned int start_delay;
@@ -275,9 +331,11 @@ struct thread_data {
 	 */
 	unsigned int cur_depth;
 	unsigned int io_u_map[FIO_IO_U_MAP_NR];
+	unsigned int io_u_lat[FIO_IO_U_LAT_NR];
 	unsigned long total_io_u;
 	struct list_head io_u_freelist;
 	struct list_head io_u_busylist;
+	struct list_head io_u_requeues;
 
 	/*
 	 * Rate state
@@ -296,6 +354,7 @@ struct thread_data {
 	unsigned long long start_offset;
 	unsigned long long total_io_size;
 
+	unsigned long io_issues[2];
 	unsigned long long io_blocks[2];
 	unsigned long long io_bytes[2];
 	unsigned long long zone_bytes;
@@ -406,6 +465,9 @@ 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];
@@ -415,6 +477,9 @@ struct disk_util_stat {
 	unsigned time_in_queue;
 };
 
+/*
+ * Per-device disk util management
+ */
 struct disk_util {
 	struct list_head list;
 
@@ -429,13 +494,10 @@ struct disk_util {
 	struct timeval time;
 };
 
-struct io_completion_data {
-	int nr;				/* input */
-
-	int error;			/* output */
-	unsigned long bytes_done[2];	/* output */
-	struct timeval time;		/* output */
-};
+/*
+ * Callback for io completion
+ */
+typedef int (endio_handler)(struct io_u *);
 
 #define DISK_UTIL_MSEC	(250)
 
@@ -532,7 +594,7 @@ enum {
  */
 extern void populate_verify_io_u(struct thread_data *, struct io_u *);
 extern int get_next_verify(struct thread_data *td, struct io_u *);
-extern int do_io_u_verify(struct thread_data *, struct io_u **);
+extern int verify_io_u(struct io_u *);
 
 /*
  * Memory helpers
@@ -547,10 +609,11 @@ extern void free_io_mem(struct thread_data *);
  */
 #define queue_full(td)	list_empty(&(td)->io_u_freelist)
 extern struct io_u *__get_io_u(struct thread_data *);
-extern struct io_u *get_io_u(struct thread_data *, struct fio_file *);
+extern struct io_u *get_io_u(struct thread_data *);
 extern void put_io_u(struct thread_data *, struct io_u *);
-extern void ios_completed(struct thread_data *, struct io_completion_data *);
-extern void io_completed(struct thread_data *, struct io_u *, struct io_completion_data *);
+extern void requeue_io_u(struct thread_data *, struct io_u **);
+extern long io_u_sync_complete(struct thread_data *, struct io_u *, endio_handler *);
+extern long io_u_queued_complete(struct thread_data *, int, endio_handler *);
 
 /*
  * io engine entry points
@@ -560,6 +623,7 @@ extern int td_io_prep(struct thread_data *, struct io_u *);
 extern int td_io_queue(struct thread_data *, struct io_u *);
 extern int td_io_sync(struct thread_data *, struct fio_file *);
 extern int td_io_getevents(struct thread_data *, int, int, struct timespec *);
+extern int td_io_commit(struct thread_data *);
 
 /*
  * This is a pretty crappy semaphore implementation, but with the use that fio
@@ -603,15 +667,17 @@ struct ioengine_ops {
 	int (*init)(struct thread_data *);
 	int (*prep)(struct thread_data *, struct io_u *);
 	int (*queue)(struct thread_data *, struct io_u *);
+	int (*commit)(struct thread_data *);
 	int (*getevents)(struct thread_data *, int, int, struct timespec *);
 	struct io_u *(*event)(struct thread_data *, int);
 	int (*cancel)(struct thread_data *, struct io_u *);
 	void (*cleanup)(struct thread_data *);
 	void *data;
 	void *dlhandle;
+	unsigned long priv;
 };
 
-#define FIO_IOOPS_VERSION	3
+#define FIO_IOOPS_VERSION	5
 
 extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
 extern int register_ioengine(struct ioengine_ops *);
@@ -630,4 +696,14 @@ 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)) {			\
+		int *__foo = NULL;	\
+		fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond);	\
+		(td)->runstate = TD_EXITED;	\
+		(td)->error = EFAULT;		\
+		*__foo = 0;			\
+	}	\
+} while (0)
+
 #endif