X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=io_u.c;h=c78865636b1f52f159bf8ef7d6846deb5fec5ef1;hp=8141991c27ca2619fe630aa903a7c4a959cb1e80;hb=b486f76ad31b593caded74f42468ea9adbdc21a7;hpb=e1161c325f7866bae879e686d1c673ca32ab09ae

diff --git a/io_u.c b/io_u.c
index 8141991c..c7886563 100644
--- a/io_u.c
+++ b/io_u.c
@@ -8,9 +8,13 @@
 #include "fio.h"
 #include "os.h"
 
+/*
+ * Change this define to play with the timeout handling
+ */
+#undef FIO_USE_TIMEOUT
+
 struct io_completion_data {
 	int nr;				/* input */
-	endio_handler *handler;		/* input */
 
 	int error;			/* output */
 	unsigned long bytes_done[2];	/* output */
@@ -33,10 +37,10 @@ static int random_map_free(struct thread_data *td, struct fio_file *f,
 /*
  * Mark a given offset as used in the map.
  */
-static void mark_random_map(struct thread_data *td, struct fio_file *f,
-			    struct io_u *io_u)
+static void mark_random_map(struct thread_data *td, struct io_u *io_u)
 {
 	unsigned int min_bs = td->rw_min_bs;
+	struct fio_file *f = io_u->file;
 	unsigned long long block;
 	unsigned int blocks;
 	unsigned int nr_blocks;
@@ -94,20 +98,23 @@ static int get_next_free_block(struct thread_data *td, struct fio_file *f,
  * until we find a free one. For sequential io, just return the end of
  * the last io issued.
  */
-static int get_next_offset(struct thread_data *td, struct fio_file *f,
-			   struct io_u *io_u)
+static int get_next_offset(struct thread_data *td, struct io_u *io_u)
 {
+	struct fio_file *f = io_u->file;
 	const int ddir = io_u->ddir;
 	unsigned long long b, rb;
 	long r;
 
-	if (!td->sequential) {
+	if (td_random(td)) {
 		unsigned long long max_blocks = f->file_size / td->min_bs[ddir];
 		int loops = 5;
 
 		do {
 			r = os_random_long(&td->random_state);
-			b = ((max_blocks - 1) * r / (unsigned long long) (RAND_MAX+1.0));
+			if (!max_blocks)
+				b = 0;
+			else
+				b = ((max_blocks - 1) * r / (unsigned long long) (RAND_MAX+1.0));
 			if (td->norandommap)
 				break;
 			rb = b + (f->file_offset / td->min_bs[ddir]);
@@ -130,9 +137,9 @@ static int get_next_offset(struct thread_data *td, struct fio_file *f,
 	return 0;
 }
 
-static unsigned int get_next_buflen(struct thread_data *td, struct fio_file *f,
-				    struct io_u *io_u)
+static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
 {
+	struct fio_file *f = io_u->file;
 	const int ddir = io_u->ddir;
 	unsigned int buflen;
 	long r;
@@ -147,8 +154,14 @@ static unsigned int get_next_buflen(struct thread_data *td, struct fio_file *f,
 	}
 
 	while (buflen + io_u->offset > f->real_file_size) {
-		if (buflen == td->min_bs[ddir])
+		if (buflen == td->min_bs[ddir]) {
+			if (!td->odirect) {
+				assert(io_u->offset <= f->real_file_size);
+				buflen = f->real_file_size - io_u->offset;
+				return buflen;
+			}
 			return 0;
+		}
 
 		buflen = td->min_bs[ddir];
 	}
@@ -207,14 +220,16 @@ void requeue_io_u(struct thread_data *td, struct io_u **io_u)
 {
 	struct io_u *__io_u = *io_u;
 
+	__io_u->flags |= IO_U_F_FREE;
+	__io_u->flags &= ~IO_U_F_FLIGHT;
+
 	list_del(&__io_u->list);
 	list_add_tail(&__io_u->list, &td->io_u_requeues);
 	td->cur_depth--;
 	*io_u = NULL;
 }
 
-static int fill_io_u(struct thread_data *td, struct fio_file *f,
-		     struct io_u *io_u)
+static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 {
 	/*
 	 * If using an iolog, grab next piece if any available.
@@ -228,7 +243,6 @@ static int fill_io_u(struct thread_data *td, struct fio_file *f,
 	if (td->fsync_blocks && !(td->io_issues[DDIR_WRITE] % td->fsync_blocks)
 	    && td->io_issues[DDIR_WRITE] && should_fsync(td)) {
 		io_u->ddir = DDIR_SYNC;
-		io_u->file = f;
 		return 0;
 	}
 
@@ -238,18 +252,18 @@ static int fill_io_u(struct thread_data *td, struct fio_file *f,
 	 * No log, let the seq/rand engine retrieve the next buflen and
 	 * position.
 	 */
-	if (get_next_offset(td, f, io_u))
+	if (get_next_offset(td, io_u))
 		return 1;
 
-	io_u->buflen = get_next_buflen(td, f, io_u);
+	io_u->buflen = get_next_buflen(td, io_u);
 	if (!io_u->buflen)
 		return 1;
 
 	/*
 	 * mark entry before potentially trimming io_u
 	 */
-	if (!td->read_iolog && !td->sequential && !td->norandommap)
-		mark_random_map(td, f, io_u);
+	if (!td->read_iolog && td_random(td) && !td->norandommap)
+		mark_random_map(td, io_u);
 
 	/*
 	 * If using a write iolog, store this entry.
@@ -257,14 +271,16 @@ static int fill_io_u(struct thread_data *td, struct fio_file *f,
 	if (td->write_iolog_file)
 		write_iolog_put(td, io_u);
 
-	io_u->file = f;
 	return 0;
 }
 
-static void io_u_mark_depth(struct thread_data *td)
+void io_u_mark_depth(struct thread_data *td, struct io_u *io_u)
 {
 	int index = 0;
 
+	if (io_u->ddir == DDIR_SYNC)
+		return;
+
 	switch (td->cur_depth) {
 	default:
 		index++;
@@ -282,8 +298,8 @@ static void io_u_mark_depth(struct thread_data *td)
 		break;
 	}
 
-	td->io_u_map[index]++;
-	td->total_io_u++;
+	td->ts.io_u_map[index]++;
+	td->ts.total_io_u[io_u->ddir]++;
 }
 
 static void io_u_mark_latency(struct thread_data *td, unsigned long msec)
@@ -317,10 +333,34 @@ static void io_u_mark_latency(struct thread_data *td, unsigned long msec)
 		break;
 	}
 
-	td->io_u_lat[index]++;
+	td->ts.io_u_lat[index]++;
 }
 
-static struct fio_file *get_next_file(struct thread_data *td)
+/*
+ * Get next file to service by choosing one at random
+ */
+static struct fio_file *get_next_file_rand(struct thread_data *td, int goodf,
+					   int badf)
+{
+	struct fio_file *f;
+	int fno;
+
+	do {
+		long r = os_random_long(&td->next_file_state);
+
+		fno = (unsigned int) ((double) td->nr_files * (r / (RAND_MAX + 1.0)));
+		f = &td->files[fno];
+
+		if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
+			return f;
+	} while (1);
+}
+
+/*
+ * Get next file to service by doing round robin between all available ones
+ */
+static struct fio_file *get_next_file_rr(struct thread_data *td, int goodf,
+					 int badf)
 {
 	unsigned int old_next_file = td->next_file;
 	struct fio_file *f;
@@ -332,7 +372,7 @@ static struct fio_file *get_next_file(struct thread_data *td)
 		if (td->next_file >= td->nr_files)
 			td->next_file = 0;
 
-		if (f->fd != -1)
+		if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
 			break;
 
 		f = NULL;
@@ -341,6 +381,41 @@ static struct fio_file *get_next_file(struct thread_data *td)
 	return f;
 }
 
+static struct fio_file *get_next_file(struct thread_data *td)
+{
+	struct fio_file *f;
+
+	assert(td->nr_files <= td->files_index);
+
+	if (!td->nr_open_files)
+		return NULL;
+
+	f = td->file_service_file;
+	if (f && (f->flags & FIO_FILE_OPEN) && td->file_service_left--)
+		return f;
+
+	if (td->file_service_type == FIO_FSERVICE_RR)
+		f = get_next_file_rr(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
+	else
+		f = get_next_file_rand(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
+
+	td->file_service_file = f;
+	td->file_service_left = td->file_service_nr - 1;
+	return f;
+}
+
+static struct fio_file *find_next_new_file(struct thread_data *td)
+{
+	struct fio_file *f;
+
+	if (td->file_service_type == FIO_FSERVICE_RR)
+		f = get_next_file_rr(td, 0, FIO_FILE_OPEN);
+	else
+		f = get_next_file_rand(td, 0, FIO_FILE_OPEN);
+
+	return f;
+}
+
 struct io_u *__get_io_u(struct thread_data *td)
 {
 	struct io_u *io_u = NULL;
@@ -353,6 +428,7 @@ struct io_u *__get_io_u(struct thread_data *td)
 		io_u->buflen = 0;
 		io_u->resid = 0;
 		io_u->file = NULL;
+		io_u->end_io = NULL;
 	}
 
 	if (io_u) {
@@ -363,7 +439,6 @@ struct io_u *__get_io_u(struct thread_data *td)
 		list_del(&io_u->list);
 		list_add(&io_u->list, &td->io_u_busylist);
 		td->cur_depth++;
-		io_u_mark_depth(td);
 	}
 
 	return io_u;
@@ -377,6 +452,7 @@ struct io_u *get_io_u(struct thread_data *td)
 {
 	struct fio_file *f;
 	struct io_u *io_u;
+	int ret;
 
 	io_u = __get_io_u(td);
 	if (!io_u)
@@ -388,24 +464,46 @@ struct io_u *get_io_u(struct thread_data *td)
 	if (io_u->file)
 		goto out;
 
-	f = get_next_file(td);
-	if (!f) {
-		put_io_u(td, io_u);
-		return NULL;
-	}
+	do {
+		f = get_next_file(td);
+		if (!f) {
+			put_io_u(td, io_u);
+			return NULL;
+		}
+
+set_file:
+		io_u->file = f;
+
+		if (!fill_io_u(td, io_u))
+			break;
 
-	io_u->file = f;
+		/*
+		 * No more to do for this file, close it
+		 */
+		io_u->file = NULL;
+		td_io_close_file(td, f);
+
+		/*
+		 * probably not the right place to do this, but see
+		 * if we need to open a new file
+		 */
+		if (td->nr_open_files < td->open_files &&
+		    td->open_files != td->nr_files) {
+			f = find_next_new_file(td);
+
+			if (!f || (ret = td_io_open_file(td, f))) {
+				put_io_u(td, io_u);
+				return NULL;
+			}
+			goto set_file;
+		}
+	} while (1);
 
 	if (td->zone_bytes >= td->zone_size) {
 		td->zone_bytes = 0;
 		f->last_pos += td->zone_skip;
 	}
 
-	if (fill_io_u(td, f, io_u)) {
-		put_io_u(td, io_u);
-		return NULL;
-	}
-
 	if (io_u->buflen + io_u->offset > f->real_file_size) {
 		if (td->io_ops->flags & FIO_RAWIO) {
 			put_io_u(td, io_u);
@@ -443,6 +541,23 @@ out:
 	return io_u;
 }
 
+void io_u_log_error(struct thread_data *td, struct io_u *io_u)
+{
+	const char *msg[] = { "read", "write", "sync" };
+
+	log_err("fio: io_u error");
+
+	if (io_u->file)
+		log_err(" on file %s", io_u->file->file_name);
+
+	log_err(": %s\n", strerror(io_u->error));
+
+	log_err("     %s offset=%llu, buflen=%lu\n", msg[io_u->ddir], io_u->offset, io_u->xfer_buflen);
+
+	if (!td->error)
+		td_verror(td, io_u->error, "io_u error");
+}
+
 static void io_completed(struct thread_data *td, struct io_u *io_u,
 			 struct io_completion_data *icd)
 {
@@ -451,6 +566,8 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 	assert(io_u->flags & IO_U_F_FLIGHT);
 	io_u->flags &= ~IO_U_F_FLIGHT;
 
+	put_file(td, io_u->file);
+
 	if (io_u->ddir == DDIR_SYNC) {
 		td->last_was_sync = 1;
 		return;
@@ -481,21 +598,21 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 
 		icd->bytes_done[idx] += bytes;
 
-		if (icd->handler) {
-			ret = icd->handler(io_u);
+		if (io_u->end_io) {
+			ret = io_u->end_io(io_u);
 			if (ret && !icd->error)
 				icd->error = ret;
 		}
-	} else
+	} else {
 		icd->error = io_u->error;
+		io_u_log_error(td, io_u);
+	}
 }
 
-static void init_icd(struct io_completion_data *icd, endio_handler *handler,
-		     int nr)
+static void init_icd(struct io_completion_data *icd, int nr)
 {
 	fio_gettime(&icd->time, NULL);
 
-	icd->handler = handler;
 	icd->nr = nr;
 
 	icd->error = 0;
@@ -519,39 +636,31 @@ static void ios_completed(struct thread_data *td,
 /*
  * Complete a single io_u for the sync engines.
  */
-long io_u_sync_complete(struct thread_data *td, struct io_u *io_u,
-			endio_handler *handler)
+long io_u_sync_complete(struct thread_data *td, struct io_u *io_u)
 {
 	struct io_completion_data icd;
 
-	init_icd(&icd, handler, 1);
+	init_icd(&icd, 1);
 	io_completed(td, io_u, &icd);
 	put_io_u(td, io_u);
 
 	if (!icd.error)
 		return icd.bytes_done[0] + icd.bytes_done[1];
 
+	td_verror(td, icd.error, "io_u_sync_complete");
 	return -1;
 }
 
 /*
  * Called to complete min_events number of io for the async engines.
  */
-long io_u_queued_complete(struct thread_data *td, int min_events,
-			  endio_handler *handler)
-
+long io_u_queued_complete(struct thread_data *td, int min_events)
 {
 	struct io_completion_data icd;
 	struct timespec *tvp = NULL;
 	int ret;
 
-	if (min_events > 0) {
-		ret = td_io_commit(td);
-		if (ret < 0) {
-			td_verror(td, -ret, "td_io_commit");
-			return ret;
-		}
-	} else {
+	if (!min_events) {
 		struct timespec ts = { .tv_sec = 0, .tv_nsec = 0, };
 
 		tvp = &ts;
@@ -564,11 +673,12 @@ long io_u_queued_complete(struct thread_data *td, int min_events,
 	} else if (!ret)
 		return ret;
 
-	init_icd(&icd, handler, ret);
+	init_icd(&icd, ret);
 	ios_completed(td, &icd);
 	if (!icd.error)
 		return icd.bytes_done[0] + icd.bytes_done[1];
 
+	td_verror(td, icd.error, "io_u_queued_complete");
 	return -1;
 }
 
@@ -595,6 +705,16 @@ void io_u_set_timeout(struct thread_data *td)
 	setitimer(ITIMER_REAL, &td->timer, NULL);
 	fio_gettime(&td->timeout_end, NULL);
 }
+
+static void io_u_dump(struct io_u *io_u)
+{
+	unsigned long t_start = mtime_since_now(&io_u->start_time);
+	unsigned long t_issue = mtime_since_now(&io_u->issue_time);
+
+	log_err("io_u=%p, t_start=%lu, t_issue=%lu\n", io_u, t_start, t_issue);
+	log_err("  buf=%p/%p, len=%lu/%lu, offset=%llu\n", io_u->buf, io_u->xfer_buf, io_u->buflen, io_u->xfer_buflen, io_u->offset);
+	log_err("  ddir=%d, fname=%s\n", io_u->ddir, io_u->file->file_name);
+}
 #else
 void io_u_set_timeout(struct thread_data fio_unused *td)
 {
@@ -606,6 +726,8 @@ static void io_u_timeout_handler(int fio_unused sig)
 {
 	struct thread_data *td, *__td;
 	pid_t pid = getpid();
+	struct list_head *entry;
+	struct io_u *io_u;
 	int i;
 
 	log_err("fio: io_u timeout\n");
@@ -632,7 +754,14 @@ static void io_u_timeout_handler(int fio_unused sig)
 	}
 
 	log_err("fio: io_u timeout: job=%s, pid=%d\n", td->name, td->pid);
-	td->error = ETIMEDOUT;
+
+	list_for_each(entry, &td->io_u_busylist) {
+		io_u = list_entry(entry, struct io_u, list);
+
+		io_u_dump(io_u);
+	}
+
+	td_verror(td, ETIMEDOUT, "io_u timeout");
 	exit(1);
 }
 #endif