From: Ankit Kumar <ankit.kumar@xxxxxxxxxxx>
defined in NVM Express TP4053. Added a new FIO option zone_append.
When zone_append option is enabled, the existing write path will
send Zone Append command with offset as start of the Zone.
Signed-off-by: Krishna Kanth Reddy <krish.reddy@xxxxxxxxxxx>
---
HOWTO | 7 +++++
fio.1 | 7 +++++
io_u.c | 4 +--
io_u.h | 10 +++++--
ioengines.c | 4 +--
options.c | 10 +++++++
thread_options.h | 2 ++
zbd.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++----
zbd.h | 13 +++++---
9 files changed, 131 insertions(+), 16 deletions(-)
diff --git a/HOWTO b/HOWTO
index 8cf8d65..62b5ac8 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1010,6 +1010,13 @@ Target file/device
:option:`zonesize` bytes of data have been transferred. This parameter
must be zero for :option:`zonemode` =zbd.
+.. option:: zone_append=bool
+
+ For :option:`zonemode` =zbd and for :option:`rw` =write or :option:
+ `rw` =randwrite, if zone_append is enabled, the the io_u points to the
+ starting offset of a zone. On successful completion the multiple of
+ sectors relative to the zone's starting offset is returned.
+
.. option:: read_beyond_wp=bool
This parameter applies to :option:`zonemode` =zbd only.
diff --git a/fio.1 b/fio.1
index f134e0b..09add8f 100644
--- a/fio.1
+++ b/fio.1
@@ -782,6 +782,13 @@ sequential workloads and ignored for random workloads. For read workloads,
see also \fBread_beyond_wp\fR.
.TP
+.BI zone_append
+For \fBzonemode\fR =zbd and for \fBrw\fR=write or \fBrw\fR=randwrite, if
+zone_append is enabled, the io_u points to the starting offset of a zone. On
+successful completion the multiple of sectors relative to the zone's starting
+offset is returned.
+
+.TP
.BI read_beyond_wp \fR=\fPbool
This parameter applies to \fBzonemode=zbd\fR only.
diff --git a/io_u.c b/io_u.c
index 7f50906..b891a9b 100644
--- a/io_u.c
+++ b/io_u.c
@@ -778,7 +778,7 @@ void put_io_u(struct thread_data *td, struct io_u *io_u)
{
const bool needs_lock = td_async_processing(td);
- zbd_put_io_u(io_u);
+ zbd_put_io_u(td, io_u);
if (td->parent)
td = td->parent;
@@ -1342,7 +1342,7 @@ static long set_io_u_file(struct thread_data *td, struct io_u *io_u)
if (!fill_io_u(td, io_u))
break;
- zbd_put_io_u(io_u);
+ zbd_put_io_u(td, io_u);
put_file_log(td, f);
td_io_close_file(td, f);
diff --git a/io_u.h b/io_u.h
index 87c2920..f5b24fd 100644
--- a/io_u.h
+++ b/io_u.h
@@ -94,19 +94,25 @@ struct io_u {
};
/*
+ * for zone append this is the start offset of the zone.
+ */
+ unsigned long long zone_start_offset;
+
+ /*
* ZBD mode zbd_queue_io callback: called after engine->queue operation
* to advance a zone write pointer and eventually unlock the I/O zone.
* @q indicates the I/O queue status (busy, queued or completed).
* @success == true means that the I/O operation has been queued or
* completed successfully.
*/
- void (*zbd_queue_io)(struct io_u *, int q, bool success);
+ void (*zbd_queue_io)(struct thread_data *, struct io_u *, int q,
+ bool success);
/*
* ZBD mode zbd_put_io callback: called in after completion of an I/O
* or commit of an async I/O to unlock the I/O target zone.
*/
- void (*zbd_put_io)(const struct io_u *);
+ void (*zbd_put_io)(struct thread_data *, const struct io_u *);
/*
* Callback for io completion
diff --git a/ioengines.c b/ioengines.c
index 2c7a0df..81ac846 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -328,7 +328,7 @@ enum fio_q_status td_io_queue(struct thread_data *td, struct io_u *io_u)
}
ret = td->io_ops->queue(td, io_u);
- zbd_queue_io_u(io_u, ret);
+ zbd_queue_io_u(td, io_u, ret);
unlock_file(td, io_u->file);
@@ -370,7 +370,7 @@ enum fio_q_status td_io_queue(struct thread_data *td, struct io_u *io_u)
if (!td->io_ops->commit) {
io_u_mark_submit(td, 1);
io_u_mark_complete(td, 1);
- zbd_put_io_u(io_u);
+ zbd_put_io_u(td, io_u);
}
if (ret == FIO_Q_COMPLETED) {
diff --git a/options.c b/options.c
index 85a0f49..d54da81 100644
--- a/options.c
+++ b/options.c
@@ -3317,6 +3317,16 @@ struct fio_option fio_options[FIO_MAX_OPTS] = {
},
},
{
+ .name = "zone_append",
+ .lname = "zone_append",
+ .type = FIO_OPT_BOOL,
+ .off1 = offsetof(struct thread_options, zone_append),
+ .help = "Use Zone Append for Zone block device",
+ .def = "0",
+ .category = FIO_OPT_C_IO,
+ .group = FIO_OPT_G_ZONE,
+ },
+ {
.name = "zonesize",
.lname = "Zone size",
.type = FIO_OPT_STR_VAL,
diff --git a/thread_options.h b/thread_options.h
index 968ea0a..45c5ef8 100644
--- a/thread_options.h
+++ b/thread_options.h
@@ -195,6 +195,7 @@ struct thread_options {
unsigned long long zone_size;
unsigned long long zone_skip;
enum fio_zone_mode zone_mode;
+ unsigned int zone_append;
unsigned long long lockmem;
enum fio_memtype mem_type;
unsigned int mem_align;
@@ -631,6 +632,7 @@ struct thread_options_pack {
uint32_t allow_mounted_write;
uint32_t zone_mode;
+ uint32_t zone_append;
} __attribute__((packed));
extern void convert_thread_options_to_cpu(struct thread_options *o, struct thread_options_pack *top);
diff --git a/zbd.c b/zbd.c
index 8cf8f81..ffdb766 100644
--- a/zbd.c
+++ b/zbd.c
@@ -455,6 +455,7 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
for (i = 0; i < nrz; i++, j++, z++, p++) {
mutex_init_pshared_with_type(&p->mutex,
PTHREAD_MUTEX_RECURSIVE);
+ cond_init_pshared(&p->reset_cond);
p->start = z->start;
switch (z->cond) {
case ZBD_ZONE_COND_NOT_WP:
@@ -469,6 +470,7 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
}
p->type = z->type;
p->cond = z->cond;
+ p->pending_ios = 0;
if (j > 0 && p->start != p[-1].start + zone_size) {
log_info("%s: invalid zone data\n",
f->file_name);
@@ -1196,20 +1198,24 @@ zbd_find_zone(struct thread_data *td, struct io_u *io_u,
/**
* zbd_queue_io - update the write pointer of a sequential zone
+ * @td: fio thread data.
* @io_u: I/O unit
* @success: Whether or not the I/O unit has been queued successfully
* @q: queueing status (busy, completed or queued).
*
* For write and trim operations, update the write pointer of the I/O unit
* target zone.
+ * For zone append operation, release the zone mutex
*/
-static void zbd_queue_io(struct io_u *io_u, int q, bool success)
+static void zbd_queue_io(struct thread_data *td, struct io_u *io_u, int q,
+ bool success)
{
const struct fio_file *f = io_u->file;
struct zoned_block_device_info *zbd_info = f->zbd_info;
struct fio_zone_info *z;
uint32_t zone_idx;
uint64_t zone_end;
+ int ret;
if (!zbd_info)
return;
@@ -1241,6 +1247,8 @@ static void zbd_queue_io(struct io_u *io_u, int q, bool success)
zbd_info->sectors_with_data += zone_end - z->wp;
pthread_mutex_unlock(&zbd_info->mutex);
z->wp = zone_end;
+ if (td->o.zone_append)
+ z->pending_ios++;
break;
case DDIR_TRIM:
assert(z->wp == z->start);
@@ -1250,18 +1258,22 @@ static void zbd_queue_io(struct io_u *io_u, int q, bool success)
}
unlock:
- if (!success || q != FIO_Q_QUEUED) {
+ if (!success || q != FIO_Q_QUEUED || td->o.zone_append) {
/* BUSY or COMPLETED: unlock the zone */
- pthread_mutex_unlock(&z->mutex);
- io_u->zbd_put_io = NULL;
+ ret = pthread_mutex_unlock(&z->mutex);
+ assert(ret == 0);
+ if (!success || q != FIO_Q_QUEUED)
+ io_u->zbd_put_io = NULL;
}
}
/**
* zbd_put_io - Unlock an I/O unit target zone lock
+ * For zone append operation we don't hold zone lock
+ * @td: fio thread data.
* @io_u: I/O unit
*/
-static void zbd_put_io(const struct io_u *io_u)
+static void zbd_put_io(struct thread_data *td, const struct io_u *io_u)
{
const struct fio_file *f = io_u->file;
struct zoned_block_device_info *zbd_info = f->zbd_info;
@@ -1283,6 +1295,19 @@ static void zbd_put_io(const struct io_u *io_u)
"%s: terminate I/O (%lld, %llu) for zone %u\n",
f->file_name, io_u->offset, io_u->buflen, zone_idx);
+ if (td->o.zone_append) {
+ pthread_mutex_lock(&z->mutex);
+ if (z->pending_ios > 0) {
+ z->pending_ios--;
+ /*
+ * Other threads may be waiting for pending I/O's to
+ * complete for this zone. Notify them.
+ */
+ if (!z->pending_ios)
+ pthread_cond_broadcast(&z->reset_cond);
+ }
+ }
+
ret = pthread_mutex_unlock(&z->mutex);
assert(ret == 0);
zbd_check_swd(f);
@@ -1524,16 +1549,69 @@ enum io_u_action zbd_adjust_block(struct thread_data *td, struct io_u *io_u)
* asynchronously and since we will submit the zone
* reset synchronously, wait until previously submitted
* write requests have completed before issuing a
- * zone reset.
+ * zone reset. For append request release the zone lock
+ * as other threads will acquire it at the time of
+ * zbd_put_io.
*/
+reset:
+ if (td->o.zone_append)
+ pthread_mutex_unlock(&zb->mutex);
io_u_quiesce(td);
+ if (td->o.zone_append)
+ pthread_mutex_lock(&zb->mutex);
+
zb->reset_zone = 0;
+ if (td->o.zone_append) {
+ /*
+ * While processing the current thread queued
+ * requests the other thread may have already
+ * done zone reset so need to check zone full
+ * condition again.
+ */
+ if (!zbd_zone_full(f, zb, min_bs))
+ goto proceed;
+ /*
+ * Wait for the pending requests to be completed
+ * else we are ok to reset this zone.
+ */
+ if (zb->pending_ios) {
+ pthread_cond_wait(&zb->reset_cond, &zb->mutex);
+ goto proceed;
+ }
+ }
+
if (zbd_reset_zone(td, f, zb) < 0)
goto eof;
+
+ /* Notify other threads waiting for zone mutex */
+ if (td->o.zone_append)
+ pthread_cond_broadcast(&zb->reset_cond);
+ }
+proceed:
+ /*
+ * Check for zone full condition again. For zone append request
+ * the zone may already be reset, written and full while we
+ * were waiting for our turn.
+ */
+ if (zbd_zone_full(f, zb, min_bs)) {
+ goto reset;
}
+
/* Make writes occur at the write pointer */
assert(!zbd_zone_full(f, zb, min_bs));
io_u->offset = zb->wp;
+
+ /*
+ * Support zone append for both regular and zoned block
+ * device.
+ */
+ if (td->o.zone_append) {
+ if (f->zbd_info->model == ZBD_NONE)
+ io_u->zone_start_offset = zb->wp;
+ else
+ io_u->zone_start_offset = zb->start;
+ }
+
if (!is_valid_offset(f, io_u->offset)) {
dprint(FD_ZBD, "Dropped request with offset %llu\n",
io_u->offset);
diff --git a/zbd.h b/zbd.h
index e942a7f..eac42f7 100644
--- a/zbd.h
+++ b/zbd.h
@@ -23,8 +23,10 @@ enum io_u_action {
* struct fio_zone_info - information about a single ZBD zone
* @start: zone start location (bytes)
* @wp: zone write pointer location (bytes)
+ * @pending_ios: Number of IO's pending in this zone
* @verify_block: number of blocks that have been verified for this zone
* @mutex: protects the modifiable members in this structure
+ * @reset_cond: zone reset check condition. only relevant for zone_append.
* @type: zone type (BLK_ZONE_TYPE_*)
* @cond: zone state (BLK_ZONE_COND_*)
* @open: whether or not this zone is currently open. Only relevant if
@@ -33,8 +35,10 @@ enum io_u_action {
*/
struct fio_zone_info {
pthread_mutex_t mutex;
+ pthread_cond_t reset_cond;
uint64_t start;
uint64_t wp;
+ uint32_t pending_ios;
uint32_t verify_block;
enum zbd_zone_type type:2;
enum zbd_zone_cond cond:4;
@@ -96,18 +100,19 @@ static inline void zbd_close_file(struct fio_file *f)
zbd_free_zone_info(f);
}
-static inline void zbd_queue_io_u(struct io_u *io_u, enum fio_q_status status)
+static inline void zbd_queue_io_u(struct thread_data *td, struct io_u *io_u,
+ enum fio_q_status status)
{
if (io_u->zbd_queue_io) {
- io_u->zbd_queue_io(io_u, status, io_u->error == 0);
+ io_u->zbd_queue_io(td, io_u, status, io_u->error == 0);
io_u->zbd_queue_io = NULL;
}
}
-static inline void zbd_put_io_u(struct io_u *io_u)
+static inline void zbd_put_io_u(struct thread_data *td, struct io_u *io_u)
{
if (io_u->zbd_put_io) {
- io_u->zbd_put_io(io_u);
+ io_u->zbd_put_io(td, io_u);
io_u->zbd_queue_io = NULL;
io_u->zbd_put_io = NULL;
}
--
2.7.4
