Fix for bs shrinkage

[fio.git] / io_u.c

diff --git a/io_u.c b/io_u.c
index fa6302e6934ba502b30a68afbba2489ea137ca50..c78865636b1f52f159bf8ef7d6846deb5fec5ef1 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -111,7 +111,10 @@ static int get_next_offset(struct thread_data *td, struct io_u *io_u)
 
                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]);
@@ -151,8 +154,14 @@ static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
        }
 
        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];
        }
@@ -265,10 +274,13 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
        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++;
@@ -286,8 +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)
@@ -321,23 +333,25 @@ 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]++;
 }
 
 /*
  * Get next file to service by choosing one at random
  */
-static struct fio_file *get_next_file_rand(struct thread_data *td)
+static struct fio_file *get_next_file_rand(struct thread_data *td, int goodf,
+                                          int badf)
 {
-       unsigned int fileno;
        struct fio_file *f;
+       int fno;
 
        do {
                long r = os_random_long(&td->next_file_state);
 
-               fileno = (unsigned int) ((double) (td->nr_files - 1) * r / (RAND_MAX + 1.0));
-               f = &td->files[fileno];
-               if (f->fd != -1)
+               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);
 }
@@ -345,7 +359,8 @@ static struct fio_file *get_next_file_rand(struct thread_data *td)
 /*
  * 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)
+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;
@@ -357,7 +372,7 @@ static struct fio_file *get_next_file_rr(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;
@@ -368,13 +383,37 @@ static struct fio_file *get_next_file_rr(struct thread_data *td)
 
 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)
-               return get_next_file_rr(td);
+               f = get_next_file_rr(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
        else
-               return get_next_file_rand(td);
+               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)
@@ -400,7 +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;
@@ -414,6 +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)
@@ -432,6 +471,7 @@ struct io_u *get_io_u(struct thread_data *td)
                        return NULL;
                }
 
+set_file:
                io_u->file = f;
 
                if (!fill_io_u(td, io_u))
@@ -441,7 +481,22 @@ struct io_u *get_io_u(struct thread_data *td)
                 * No more to do for this file, close it
                 */
                io_u->file = NULL;
-               close_file(td, f);
+               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) {
@@ -486,6 +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)
 {
@@ -494,6 +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;
@@ -529,8 +603,10 @@ static void io_completed(struct thread_data *td, struct io_u *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, int nr)