block: Update to io-controller stats
Changelog from v1:
o Call blkiocg_update_idle_time_stats() at cfq_rq_enqueued() instead of at
dispatch time.
Changelog from original patchset: (in response to Vivek Goyal's comments)
o group blkiocg_update_blkio_group_dequeue_stats() with other DEBUG functions
o rename blkiocg_update_set_active_queue_stats() to
blkiocg_update_avg_queue_size_stats()
o s/request/io/ in blkiocg_update_request_add_stats() and
blkiocg_update_request_remove_stats()
o Call cfq_del_timer() at request dispatch() instead of
blkiocg_update_idle_time_stats()
Signed-off-by: Divyesh Shah<dpshah@google.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 649b05d..25cc751 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -202,7 +202,7 @@
}
EXPORT_SYMBOL_GPL(blkiocg_update_idle_time_stats);
-void blkiocg_update_set_active_queue_stats(struct blkio_group *blkg)
+void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg)
{
unsigned long flags;
struct blkio_group_stats *stats;
@@ -216,14 +216,21 @@
blkio_update_group_wait_time(stats);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
-EXPORT_SYMBOL_GPL(blkiocg_update_set_active_queue_stats);
+EXPORT_SYMBOL_GPL(blkiocg_update_avg_queue_size_stats);
+
+void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
+ unsigned long dequeue)
+{
+ blkg->stats.dequeue += dequeue;
+}
+EXPORT_SYMBOL_GPL(blkiocg_update_dequeue_stats);
#else
static inline void blkio_set_start_group_wait_time(struct blkio_group *blkg,
struct blkio_group *curr_blkg) {}
static inline void blkio_end_empty_time(struct blkio_group_stats *stats) {}
#endif
-void blkiocg_update_request_add_stats(struct blkio_group *blkg,
+void blkiocg_update_io_add_stats(struct blkio_group *blkg,
struct blkio_group *curr_blkg, bool direction,
bool sync)
{
@@ -236,9 +243,9 @@
blkio_set_start_group_wait_time(blkg, curr_blkg);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
-EXPORT_SYMBOL_GPL(blkiocg_update_request_add_stats);
+EXPORT_SYMBOL_GPL(blkiocg_update_io_add_stats);
-void blkiocg_update_request_remove_stats(struct blkio_group *blkg,
+void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
bool direction, bool sync)
{
unsigned long flags;
@@ -248,7 +255,7 @@
direction, sync);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
-EXPORT_SYMBOL_GPL(blkiocg_update_request_remove_stats);
+EXPORT_SYMBOL_GPL(blkiocg_update_io_remove_stats);
void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time)
{
@@ -636,15 +643,6 @@
#endif
#undef SHOW_FUNCTION_PER_GROUP
-#ifdef CONFIG_DEBUG_BLK_CGROUP
-void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue)
-{
- blkg->stats.dequeue += dequeue;
-}
-EXPORT_SYMBOL_GPL(blkiocg_update_dequeue_stats);
-#endif
-
static int blkio_check_dev_num(dev_t dev)
{
int part = 0;
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 3c27bdf..1d409ad 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -169,7 +169,7 @@
{
return blkg->path;
}
-void blkiocg_update_set_active_queue_stats(struct blkio_group *blkg);
+void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg);
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
unsigned long dequeue);
void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg);
@@ -198,7 +198,7 @@
#undef BLKG_FLAG_FNS
#else
static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
-static inline void blkiocg_update_set_active_queue_stats(
+static inline void blkiocg_update_avg_queue_size_stats(
struct blkio_group *blkg) {}
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
unsigned long dequeue) {}
@@ -226,9 +226,9 @@
uint64_t start_time, uint64_t io_start_time, bool direction, bool sync);
void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction,
bool sync);
-void blkiocg_update_request_add_stats(struct blkio_group *blkg,
+void blkiocg_update_io_add_stats(struct blkio_group *blkg,
struct blkio_group *curr_blkg, bool direction, bool sync);
-void blkiocg_update_request_remove_stats(struct blkio_group *blkg,
+void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
bool direction, bool sync);
#else
struct cgroup;
@@ -253,9 +253,9 @@
bool sync) {}
static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
bool direction, bool sync) {}
-static inline void blkiocg_update_request_add_stats(struct blkio_group *blkg,
+static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg,
struct blkio_group *curr_blkg, bool direction, bool sync) {}
-static inline void blkiocg_update_request_remove_stats(struct blkio_group *blkg,
+static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
bool direction, bool sync) {}
#endif
#endif /* _BLK_CGROUP_H */
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 91af2f2..42be3b6 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1381,10 +1381,10 @@
{
elv_rb_del(&cfqq->sort_list, rq);
cfqq->queued[rq_is_sync(rq)]--;
- blkiocg_update_request_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
+ blkiocg_update_io_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
rq_is_sync(rq));
cfq_add_rq_rb(rq);
- blkiocg_update_request_add_stats(
+ blkiocg_update_io_add_stats(
&cfqq->cfqg->blkg, &cfqq->cfqd->serving_group->blkg,
rq_data_dir(rq), rq_is_sync(rq));
}
@@ -1442,7 +1442,7 @@
cfq_del_rq_rb(rq);
cfqq->cfqd->rq_queued--;
- blkiocg_update_request_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
+ blkiocg_update_io_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
rq_is_sync(rq));
if (rq_is_meta(rq)) {
WARN_ON(!cfqq->meta_pending);
@@ -1541,7 +1541,7 @@
if (cfqq) {
cfq_log_cfqq(cfqd, cfqq, "set_active wl_prio:%d wl_type:%d",
cfqd->serving_prio, cfqd->serving_type);
- blkiocg_update_set_active_queue_stats(&cfqq->cfqg->blkg);
+ blkiocg_update_avg_queue_size_stats(&cfqq->cfqg->blkg);
cfqq->slice_start = 0;
cfqq->dispatch_start = jiffies;
cfqq->allocated_slice = 0;
@@ -2395,11 +2395,6 @@
}
cfq_log_cfqq(cfqd, cfqq, "dispatched a request");
- /*
- * This is needed since we don't exactly match the mod_timer() and
- * del_timer() calls in CFQ.
- */
- blkiocg_update_idle_time_stats(&cfqq->cfqg->blkg);
return 1;
}
@@ -3208,8 +3203,11 @@
cfq_del_timer(cfqd, cfqq);
cfq_clear_cfqq_wait_request(cfqq);
__blk_run_queue(cfqd->queue);
- } else
+ } else {
+ blkiocg_update_idle_time_stats(
+ &cfqq->cfqg->blkg);
cfq_mark_cfqq_must_dispatch(cfqq);
+ }
}
} else if (cfq_should_preempt(cfqd, cfqq, rq)) {
/*
@@ -3235,7 +3233,7 @@
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
- blkiocg_update_request_add_stats(&cfqq->cfqg->blkg,
+ blkiocg_update_io_add_stats(&cfqq->cfqg->blkg,
&cfqd->serving_group->blkg, rq_data_dir(rq),
rq_is_sync(rq));
cfq_rq_enqueued(cfqd, cfqq, rq);