dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

blkcg: move blkio_group_stats to cfq-iosched.c 

blkio_group_stats contains only fields used by cfq and has no reason
to be defined in blkcg core.

* Move blkio_group_stats to cfq-iosched.c and rename it to cfqg_stats.

* blkg_policy_data->stats is replaced with cfq_group->stats.
  blkg_prfill_[rw]stat() are updated to use offset against pd->pdata
  instead.

* All related macros / functions are renamed so that they have cfqg_
  prefix and the unnecessary @pol arguments are dropped.

* All stat functions now take cfq_group * instead of blkio_group *.

* lockdep assertion on queue lock dropped.  Elevator runs under queue
  lock by default.  There isn't much to be gained by adding lockdep
  assertions at stat function level.

* cfqg_stats_reset() implemented for blkio_reset_group_stats_fn method
  so that cfqg->stats can be reset.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2012-04-01 14:38:44 -07:00
parent 9ade5ea4ce
commit 155fead9b6
3 changed files with 193 additions and 278 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
block/blk-cgroup.c
View File

@ -417,25 +417,6 @@ blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val)
struct blkio_policy_type *pol;
list_for_each_entry(pol, &blkio_list, list) {
struct blkg_policy_data *pd = blkg->pd[pol->plid];
struct blkio_group_stats *stats = &pd->stats;
/* queued stats shouldn't be cleared */
blkg_rwstat_reset(&stats->service_bytes);
blkg_rwstat_reset(&stats->serviced);
blkg_rwstat_reset(&stats->merged);
blkg_rwstat_reset(&stats->service_time);
blkg_rwstat_reset(&stats->wait_time);
blkg_stat_reset(&stats->time);
#ifdef CONFIG_DEBUG_BLK_CGROUP
blkg_stat_reset(&stats->unaccounted_time);
blkg_stat_reset(&stats->avg_queue_size_sum);
blkg_stat_reset(&stats->avg_queue_size_samples);
blkg_stat_reset(&stats->dequeue);
blkg_stat_reset(&stats->group_wait_time);
blkg_stat_reset(&stats->idle_time);
blkg_stat_reset(&stats->empty_time);
#endif
blkio_reset_stats_cpu(blkg, pol->plid);
if (pol->ops.blkio_reset_group_stats_fn)
@ -549,13 +530,13 @@ static u64 blkg_prfill_stat(struct seq_file *sf, struct blkg_policy_data *pd,
int off)
{
return __blkg_prfill_u64(sf, pd,
blkg_stat_read((void *)&pd->stats + off));
blkg_stat_read((void *)pd->pdata + off));
}
static u64 blkg_prfill_rwstat(struct seq_file *sf, struct blkg_policy_data *pd,
int off)
{
struct blkg_rwstat rwstat = blkg_rwstat_read((void *)&pd->stats + off);
struct blkg_rwstat rwstat = blkg_rwstat_read((void *)pd->pdata + off);
return __blkg_prfill_rwstat(sf, pd, &rwstat);
}

41
block/blk-cgroup.h
View File

@ -64,46 +64,6 @@ struct blkg_rwstat {
uint64_t cnt[BLKG_RWSTAT_NR];
};
struct blkio_group_stats {
/* total bytes transferred */
struct blkg_rwstat service_bytes;
/* total IOs serviced, post merge */
struct blkg_rwstat serviced;
/* number of ios merged */
struct blkg_rwstat merged;
/* total time spent on device in ns, may not be accurate w/ queueing */
struct blkg_rwstat service_time;
/* total time spent waiting in scheduler queue in ns */
struct blkg_rwstat wait_time;
/* number of IOs queued up */
struct blkg_rwstat queued;
/* total sectors transferred */
struct blkg_stat sectors;
/* total disk time and nr sectors dispatched by this group */
struct blkg_stat time;
#ifdef CONFIG_DEBUG_BLK_CGROUP
/* time not charged to this cgroup */
struct blkg_stat unaccounted_time;
/* sum of number of ios queued across all samples */
struct blkg_stat avg_queue_size_sum;
/* count of samples taken for average */
struct blkg_stat avg_queue_size_samples;
/* how many times this group has been removed from service tree */
struct blkg_stat dequeue;
/* total time spent waiting for it to be assigned a timeslice. */
struct blkg_stat group_wait_time;
/* time spent idling for this blkio_group */
struct blkg_stat idle_time;
/* total time with empty current active q with other requests queued */
struct blkg_stat empty_time;
/* fields after this shouldn't be cleared on stat reset */
uint64_t start_group_wait_time;
uint64_t start_idle_time;
uint64_t start_empty_time;
uint16_t flags;
#endif
};
/* Per cpu blkio group stats */
struct blkio_group_stats_cpu {
/* total bytes transferred */
@ -126,7 +86,6 @@ struct blkg_policy_data {
/* Configuration */
struct blkio_group_conf conf;
struct blkio_group_stats stats;
/* Per cpu stats pointer */
struct blkio_group_stats_cpu __percpu *stats_cpu;

407
block/cfq-iosched.c
View File

@ -173,6 +173,48 @@ enum wl_type_t {
SYNC_WORKLOAD = 2
};
struct cfqg_stats {
#ifdef CONFIG_CFQ_GROUP_IOSCHED
/* total bytes transferred */
struct blkg_rwstat service_bytes;
/* total IOs serviced, post merge */
struct blkg_rwstat serviced;
/* number of ios merged */
struct blkg_rwstat merged;
/* total time spent on device in ns, may not be accurate w/ queueing */
struct blkg_rwstat service_time;
/* total time spent waiting in scheduler queue in ns */
struct blkg_rwstat wait_time;
/* number of IOs queued up */
struct blkg_rwstat queued;
/* total sectors transferred */
struct blkg_stat sectors;
/* total disk time and nr sectors dispatched by this group */
struct blkg_stat time;
#ifdef CONFIG_DEBUG_BLK_CGROUP
/* time not charged to this cgroup */
struct blkg_stat unaccounted_time;
/* sum of number of ios queued across all samples */
struct blkg_stat avg_queue_size_sum;
/* count of samples taken for average */
struct blkg_stat avg_queue_size_samples;
/* how many times this group has been removed from service tree */
struct blkg_stat dequeue;
/* total time spent waiting for it to be assigned a timeslice. */
struct blkg_stat group_wait_time;
/* time spent idling for this blkio_group */
struct blkg_stat idle_time;
/* total time with empty current active q with other requests queued */
struct blkg_stat empty_time;
/* fields after this shouldn't be cleared on stat reset */
uint64_t start_group_wait_time;
uint64_t start_idle_time;
uint64_t start_empty_time;
uint16_t flags;
#endif /* CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_CFQ_GROUP_IOSCHED */
};
/* This is per cgroup per device grouping structure */
struct cfq_group {
/* group service_tree member */
@ -212,6 +254,7 @@ struct cfq_group {
/* number of requests that are on the dispatch list or inside driver */
int dispatched;
struct cfq_ttime ttime;
struct cfqg_stats stats;
};
struct cfq_io_cq {
@ -368,96 +411,84 @@ CFQ_CFQQ_FNS(wait_busy);
#if defined(CONFIG_CFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
/* blkg state flags */
enum blkg_state_flags {
BLKG_waiting = 0,
BLKG_idling,
BLKG_empty,
/* cfqg stats flags */
enum cfqg_stats_flags {
CFQG_stats_waiting = 0,
CFQG_stats_idling,
CFQG_stats_empty,
};
#define BLKG_FLAG_FNS(name) \
static inline void blkio_mark_blkg_##name( \
struct blkio_group_stats *stats) \
#define CFQG_FLAG_FNS(name) \
static inline void cfqg_stats_mark_##name(struct cfqg_stats *stats) \
{ \
stats->flags |= (1 << BLKG_##name); \
stats->flags |= (1 << CFQG_stats_##name); \
} \
static inline void blkio_clear_blkg_##name( \
struct blkio_group_stats *stats) \
static inline void cfqg_stats_clear_##name(struct cfqg_stats *stats) \
{ \
stats->flags &= ~(1 << BLKG_##name); \
stats->flags &= ~(1 << CFQG_stats_##name); \
} \
static inline int blkio_blkg_##name(struct blkio_group_stats *stats) \
static inline int cfqg_stats_##name(struct cfqg_stats *stats) \
{ \
return (stats->flags & (1 << BLKG_##name)) != 0; \
return (stats->flags & (1 << CFQG_stats_##name)) != 0; \
} \
BLKG_FLAG_FNS(waiting)
BLKG_FLAG_FNS(idling)
BLKG_FLAG_FNS(empty)
#undef BLKG_FLAG_FNS
CFQG_FLAG_FNS(waiting)
CFQG_FLAG_FNS(idling)
CFQG_FLAG_FNS(empty)
#undef CFQG_FLAG_FNS
/* This should be called with the queue_lock held. */
static void blkio_update_group_wait_time(struct blkio_group_stats *stats)
static void cfqg_stats_update_group_wait_time(struct cfqg_stats *stats)
{
unsigned long long now;
if (!blkio_blkg_waiting(stats))
if (!cfqg_stats_waiting(stats))
return;
now = sched_clock();
if (time_after64(now, stats->start_group_wait_time))
blkg_stat_add(&stats->group_wait_time,
now - stats->start_group_wait_time);
blkio_clear_blkg_waiting(stats);
cfqg_stats_clear_waiting(stats);
}
/* This should be called with the queue_lock held. */
static void blkio_set_start_group_wait_time(struct blkio_group *blkg,
struct blkio_policy_type *pol,
struct blkio_group *curr_blkg)
static void cfqg_stats_set_start_group_wait_time(struct cfq_group *cfqg,
struct cfq_group *curr_cfqg)
{
struct blkg_policy_data *pd = blkg->pd[pol->plid];
struct cfqg_stats *stats = &cfqg->stats;
if (blkio_blkg_waiting(&pd->stats))
if (cfqg_stats_waiting(stats))
return;
if (blkg == curr_blkg)
if (cfqg == curr_cfqg)
return;
pd->stats.start_group_wait_time = sched_clock();
blkio_mark_blkg_waiting(&pd->stats);
stats->start_group_wait_time = sched_clock();
cfqg_stats_mark_waiting(stats);
}
/* This should be called with the queue_lock held. */
static void blkio_end_empty_time(struct blkio_group_stats *stats)
static void cfqg_stats_end_empty_time(struct cfqg_stats *stats)
{
unsigned long long now;
if (!blkio_blkg_empty(stats))
if (!cfqg_stats_empty(stats))
return;
now = sched_clock();
if (time_after64(now, stats->start_empty_time))
blkg_stat_add(&stats->empty_time,
now - stats->start_empty_time);
blkio_clear_blkg_empty(stats);
cfqg_stats_clear_empty(stats);
}
static void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol,
unsigned long dequeue)
static void cfqg_stats_update_dequeue(struct cfq_group *cfqg)
{
struct blkg_policy_data *pd = blkg->pd[pol->plid];
lockdep_assert_held(blkg->q->queue_lock);
blkg_stat_add(&pd->stats.dequeue, dequeue);
blkg_stat_add(&cfqg->stats.dequeue, 1);
}
static void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg,
struct blkio_policy_type *pol)
static void cfqg_stats_set_start_empty_time(struct cfq_group *cfqg)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
lockdep_assert_held(blkg->q->queue_lock);
struct cfqg_stats *stats = &cfqg->stats;
if (blkg_rwstat_sum(&stats->queued))
return;
@ -467,72 +498,57 @@ static void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg,
* request in parent group and moved to this group while being added
* to service tree. Just ignore the event and move on.
*/
if (blkio_blkg_empty(stats))
if (cfqg_stats_empty(stats))
return;
stats->start_empty_time = sched_clock();
blkio_mark_blkg_empty(stats);
cfqg_stats_mark_empty(stats);
}
static void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol)
static void cfqg_stats_update_idle_time(struct cfq_group *cfqg)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
struct cfqg_stats *stats = &cfqg->stats;
lockdep_assert_held(blkg->q->queue_lock);
if (blkio_blkg_idling(stats)) {
if (cfqg_stats_idling(stats)) {
unsigned long long now = sched_clock();
if (time_after64(now, stats->start_idle_time))
blkg_stat_add(&stats->idle_time,
now - stats->start_idle_time);
blkio_clear_blkg_idling(stats);
cfqg_stats_clear_idling(stats);
}
}
static void cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol)
static void cfqg_stats_set_start_idle_time(struct cfq_group *cfqg)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
struct cfqg_stats *stats = &cfqg->stats;
lockdep_assert_held(blkg->q->queue_lock);
BUG_ON(blkio_blkg_idling(stats));
BUG_ON(cfqg_stats_idling(stats));
stats->start_idle_time = sched_clock();
blkio_mark_blkg_idling(stats);
cfqg_stats_mark_idling(stats);
}
static void cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol)
static void cfqg_stats_update_avg_queue_size(struct cfq_group *cfqg)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
lockdep_assert_held(blkg->q->queue_lock);
struct cfqg_stats *stats = &cfqg->stats;
blkg_stat_add(&stats->avg_queue_size_sum,
blkg_rwstat_sum(&stats->queued));
blkg_stat_add(&stats->avg_queue_size_samples, 1);
blkio_update_group_wait_time(stats);
cfqg_stats_update_group_wait_time(stats);
}
#else /* CONFIG_CFQ_GROUP_IOSCHED && CONFIG_DEBUG_BLK_CGROUP */
static void blkio_set_start_group_wait_time(struct blkio_group *blkg,
struct blkio_policy_type *pol,
struct blkio_group *curr_blkg) { }
static void blkio_end_empty_time(struct blkio_group_stats *stats) { }
static void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol,
unsigned long dequeue) { }
static void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg,
struct blkio_policy_type *pol) { }
static void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol) { }
static void cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol) { }
static void cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol) { }
static void cfqg_stats_set_start_group_wait_time(struct cfq_group *cfqg,
struct cfq_group *curr_cfqg) { }
static void cfqg_stats_end_empty_time(struct cfqg_stats *stats) { }
static void cfqg_stats_update_dequeue(struct cfq_group *cfqg) { }
static void cfqg_stats_set_start_empty_time(struct cfq_group *cfqg) { }
static void cfqg_stats_update_idle_time(struct cfq_group *cfqg) { }
static void cfqg_stats_set_start_idle_time(struct cfq_group *cfqg) { }
static void cfqg_stats_update_avg_queue_size(struct cfq_group *cfqg) { }
#endif /* CONFIG_CFQ_GROUP_IOSCHED && CONFIG_DEBUG_BLK_CGROUP */
@ -567,80 +583,46 @@ static inline void cfqg_put(struct cfq_group *cfqg)
blk_add_trace_msg((cfqd)->queue, "%s " fmt, \
blkg_path(cfqg_to_blkg((cfqg))), ##args) \
static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol,
struct blkio_group *curr_blkg,
bool direction, bool sync)
static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg,
struct cfq_group *curr_cfqg, int rw)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
int rw = (direction ? REQ_WRITE : 0) | (sync ? REQ_SYNC : 0);
lockdep_assert_held(blkg->q->queue_lock);
blkg_rwstat_add(&stats->queued, rw, 1);
blkio_end_empty_time(stats);
blkio_set_start_group_wait_time(blkg, pol, curr_blkg);
blkg_rwstat_add(&cfqg->stats.queued, rw, 1);
cfqg_stats_end_empty_time(&cfqg->stats);
cfqg_stats_set_start_group_wait_time(cfqg, curr_cfqg);
}
static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg,
struct blkio_policy_type *pol, unsigned long time,
unsigned long unaccounted_time)
static inline void cfqg_stats_update_timeslice_used(struct cfq_group *cfqg,
unsigned long time, unsigned long unaccounted_time)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
lockdep_assert_held(blkg->q->queue_lock);
blkg_stat_add(&stats->time, time);
blkg_stat_add(&cfqg->stats.time, time);
#ifdef CONFIG_DEBUG_BLK_CGROUP
blkg_stat_add(&stats->unaccounted_time, unaccounted_time);
blkg_stat_add(&cfqg->stats.unaccounted_time, unaccounted_time);
#endif
}
static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, bool direction,
bool sync)
static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int rw)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
int rw = (direction ? REQ_WRITE : 0) | (sync ? REQ_SYNC : 0);
lockdep_assert_held(blkg->q->queue_lock);
blkg_rwstat_add(&stats->queued, rw, -1);
blkg_rwstat_add(&cfqg->stats.queued, rw, -1);
}
static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, bool direction,
bool sync)
static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int rw)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
int rw = (direction ? REQ_WRITE : 0) | (sync ? REQ_SYNC : 0);
lockdep_assert_held(blkg->q->queue_lock);
blkg_rwstat_add(&stats->merged, rw, 1);
blkg_rwstat_add(&cfqg->stats.merged, rw, 1);
}
static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, uint64_t bytes,
bool direction, bool sync)
static inline void cfqg_stats_update_dispatch(struct cfq_group *cfqg,
uint64_t bytes, int rw)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
int rw = (direction ? REQ_WRITE : 0) | (sync ? REQ_SYNC : 0);
blkg_stat_add(&stats->sectors, bytes >> 9);
blkg_rwstat_add(&stats->serviced, rw, 1);
blkg_rwstat_add(&stats->service_bytes, rw, bytes);
blkg_stat_add(&cfqg->stats.sectors, bytes >> 9);
blkg_rwstat_add(&cfqg->stats.serviced, rw, 1);
blkg_rwstat_add(&cfqg->stats.service_bytes, rw, bytes);
}
static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, uint64_t start_time,
uint64_t io_start_time, bool direction, bool sync)
static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
uint64_t start_time, uint64_t io_start_time, int rw)
{
struct blkio_group_stats *stats = &blkg->pd[pol->plid]->stats;
struct cfqg_stats *stats = &cfqg->stats;
unsigned long long now = sched_clock();
int rw = (direction ? REQ_WRITE : 0) | (sync ? REQ_SYNC : 0);
lockdep_assert_held(blkg->q->queue_lock);
if (time_after64(now, io_start_time))
blkg_rwstat_add(&stats->service_time, rw, now - io_start_time);
@ -649,6 +631,29 @@ static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
io_start_time - start_time);
}
static void cfqg_stats_reset(struct blkio_group *blkg)
{
struct cfq_group *cfqg = blkg_to_cfqg(blkg);
struct cfqg_stats *stats = &cfqg->stats;
/* queued stats shouldn't be cleared */
blkg_rwstat_reset(&stats->service_bytes);
blkg_rwstat_reset(&stats->serviced);
blkg_rwstat_reset(&stats->merged);
blkg_rwstat_reset(&stats->service_time);
blkg_rwstat_reset(&stats->wait_time);
blkg_stat_reset(&stats->time);
#ifdef CONFIG_DEBUG_BLK_CGROUP
blkg_stat_reset(&stats->unaccounted_time);
blkg_stat_reset(&stats->avg_queue_size_sum);
blkg_stat_reset(&stats->avg_queue_size_samples);
blkg_stat_reset(&stats->dequeue);
blkg_stat_reset(&stats->group_wait_time);
blkg_stat_reset(&stats->idle_time);
blkg_stat_reset(&stats->empty_time);
#endif
}
#else /* CONFIG_CFQ_GROUP_IOSCHED */
static inline struct cfq_group *blkg_to_cfqg(struct blkio_group *blkg) { return NULL; }
@ -660,25 +665,16 @@ static inline void cfqg_put(struct cfq_group *cfqg) { }
blk_add_trace_msg((cfqd)->queue, "cfq%d " fmt, (cfqq)->pid, ##args)
#define cfq_log_cfqg(cfqd, cfqg, fmt, args...) do {} while (0)
static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol,
struct blkio_group *curr_blkg, bool direction,
bool sync) { }
static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg,
struct blkio_policy_type *pol, unsigned long time,
unsigned long unaccounted_time) { }
static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, bool direction,
bool sync) { }
static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, bool direction,
bool sync) { }
static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, uint64_t bytes,
bool direction, bool sync) { }
static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
struct blkio_policy_type *pol, uint64_t start_time,
uint64_t io_start_time, bool direction, bool sync) { }
static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg,
struct cfq_group *curr_cfqg, int rw) { }
static inline void cfqg_stats_update_timeslice_used(struct cfq_group *cfqg,
unsigned long time, unsigned long unaccounted_time) { }
static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int rw) { }
static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int rw) { }
static inline void cfqg_stats_update_dispatch(struct cfq_group *cfqg,
uint64_t bytes, int rw) { }
static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
uint64_t start_time, uint64_t io_start_time, int rw) { }
#endif /* CONFIG_CFQ_GROUP_IOSCHED */
@ -1233,8 +1229,7 @@ cfq_group_notify_queue_del(struct cfq_data *cfqd, struct cfq_group *cfqg)
cfq_log_cfqg(cfqd, cfqg, "del_from_rr group");
cfq_group_service_tree_del(st, cfqg);
cfqg->saved_workload_slice = 0;
cfq_blkiocg_update_dequeue_stats(cfqg_to_blkg(cfqg),
&blkio_policy_cfq, 1);
cfqg_stats_update_dequeue(cfqg);
}
static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq,
@ -1306,9 +1301,8 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
"sl_used=%u disp=%u charge=%u iops=%u sect=%lu",
used_sl, cfqq->slice_dispatch, charge,
iops_mode(cfqd), cfqq->nr_sectors);
cfq_blkiocg_update_timeslice_used(cfqg_to_blkg(cfqg), &blkio_policy_cfq,
used_sl, unaccounted_sl);
cfq_blkiocg_set_start_empty_time(cfqg_to_blkg(cfqg), &blkio_policy_cfq);
cfqg_stats_update_timeslice_used(cfqg, used_sl, unaccounted_sl);
cfqg_stats_set_start_empty_time(cfqg);
}
/**
@ -1456,14 +1450,15 @@ static int blkcg_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
}
#ifdef CONFIG_DEBUG_BLK_CGROUP
static u64 blkg_prfill_avg_queue_size(struct seq_file *sf,
static u64 cfqg_prfill_avg_queue_size(struct seq_file *sf,
struct blkg_policy_data *pd, int off)
{
u64 samples = blkg_stat_read(&pd->stats.avg_queue_size_samples);
struct cfq_group *cfqg = (void *)pd->pdata;
u64 samples = blkg_stat_read(&cfqg->stats.avg_queue_size_samples);
u64 v = 0;
if (samples) {
v = blkg_stat_read(&pd->stats.avg_queue_size_sum);
v = blkg_stat_read(&cfqg->stats.avg_queue_size_sum);
do_div(v, samples);
}
__blkg_prfill_u64(sf, pd, v);
@ -1471,12 +1466,12 @@ static u64 blkg_prfill_avg_queue_size(struct seq_file *sf,
}
/* print avg_queue_size */
static int blkcg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft,
struct seq_file *sf)
static int cfqg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft,
struct seq_file *sf)
{
struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
blkcg_print_blkgs(sf, blkcg, blkg_prfill_avg_queue_size,
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_avg_queue_size,
BLKIO_POLICY_PROP, 0, false);
return 0;
}
@ -1497,84 +1492,84 @@ static struct cftype cfq_blkcg_files[] = {
{
.name = "time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, time)),
offsetof(struct cfq_group, stats.time)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "sectors",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, sectors)),
offsetof(struct cfq_group, stats.sectors)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "io_service_bytes",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, service_bytes)),
offsetof(struct cfq_group, stats.service_bytes)),
.read_seq_string = blkcg_print_rwstat,
},
{
.name = "io_serviced",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, serviced)),
offsetof(struct cfq_group, stats.serviced)),
.read_seq_string = blkcg_print_rwstat,
},
{
.name = "io_service_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, service_time)),
offsetof(struct cfq_group, stats.service_time)),
.read_seq_string = blkcg_print_rwstat,
},
{
.name = "io_wait_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, wait_time)),
offsetof(struct cfq_group, stats.wait_time)),
.read_seq_string = blkcg_print_rwstat,
},
{
.name = "io_merged",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, merged)),
offsetof(struct cfq_group, stats.merged)),
.read_seq_string = blkcg_print_rwstat,
},
{
.name = "io_queued",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, queued)),
offsetof(struct cfq_group, stats.queued)),
.read_seq_string = blkcg_print_rwstat,
},
#ifdef CONFIG_DEBUG_BLK_CGROUP
{
.name = "avg_queue_size",
.read_seq_string = blkcg_print_avg_queue_size,
.read_seq_string = cfqg_print_avg_queue_size,
},
{
.name = "group_wait_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, group_wait_time)),
offsetof(struct cfq_group, stats.group_wait_time)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "idle_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, idle_time)),
offsetof(struct cfq_group, stats.idle_time)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "empty_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, empty_time)),
offsetof(struct cfq_group, stats.empty_time)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "dequeue",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, dequeue)),
offsetof(struct cfq_group, stats.dequeue)),
.read_seq_string = blkcg_print_stat,
},
{
.name = "unaccounted_time",
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
offsetof(struct blkio_group_stats, unaccounted_time)),
offsetof(struct cfq_group, stats.unaccounted_time)),
.read_seq_string = blkcg_print_stat,
},
#endif /* CONFIG_DEBUG_BLK_CGROUP */
@ -1858,14 +1853,10 @@ static void cfq_reposition_rq_rb(struct cfq_queue *cfqq, struct request *rq)
{
elv_rb_del(&cfqq->sort_list, rq);
cfqq->queued[rq_is_sync(rq)]--;
cfq_blkiocg_update_io_remove_stats(cfqg_to_blkg(RQ_CFQG(rq)),
&blkio_policy_cfq, rq_data_dir(rq),
rq_is_sync(rq));
cfqg_stats_update_io_remove(RQ_CFQG(rq), rq->cmd_flags);
cfq_add_rq_rb(rq);
cfq_blkiocg_update_io_add_stats(cfqg_to_blkg(RQ_CFQG(rq)),
&blkio_policy_cfq,
cfqg_to_blkg(cfqq->cfqd->serving_group),
rq_data_dir(rq), rq_is_sync(rq));
cfqg_stats_update_io_add(RQ_CFQG(rq), cfqq->cfqd->serving_group,
rq->cmd_flags);
}
static struct request *
@ -1921,9 +1912,7 @@ static void cfq_remove_request(struct request *rq)
cfq_del_rq_rb(rq);
cfqq->cfqd->rq_queued--;
cfq_blkiocg_update_io_remove_stats(cfqg_to_blkg(RQ_CFQG(rq)),
&blkio_policy_cfq, rq_data_dir(rq),
rq_is_sync(rq));
cfqg_stats_update_io_remove(RQ_CFQG(rq), rq->cmd_flags);
if (rq->cmd_flags & REQ_PRIO) {
WARN_ON(!cfqq->prio_pending);
cfqq->prio_pending--;
@ -1958,9 +1947,7 @@ static void cfq_merged_request(struct request_queue *q, struct request *req,
static void cfq_bio_merged(struct request_queue *q, struct request *req,
struct bio *bio)
{
cfq_blkiocg_update_io_merged_stats(cfqg_to_blkg(RQ_CFQG(req)),
&blkio_policy_cfq, bio_data_dir(bio),
cfq_bio_sync(bio));
cfqg_stats_update_io_merged(RQ_CFQG(req), bio->bi_rw);
}
static void
@ -1982,9 +1969,7 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
if (cfqq->next_rq == next)
cfqq->next_rq = rq;
cfq_remove_request(next);
cfq_blkiocg_update_io_merged_stats(cfqg_to_blkg(RQ_CFQG(rq)),
&blkio_policy_cfq, rq_data_dir(next),
rq_is_sync(next));
cfqg_stats_update_io_merged(RQ_CFQG(rq), next->cmd_flags);
cfqq = RQ_CFQQ(next);
/*
@ -2025,8 +2010,7 @@ static int cfq_allow_merge(struct request_queue *q, struct request *rq,
static inline void cfq_del_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
del_timer(&cfqd->idle_slice_timer);
cfq_blkiocg_update_idle_time_stats(cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq);
cfqg_stats_update_idle_time(cfqq->cfqg);
}
static void __cfq_set_active_queue(struct cfq_data *cfqd,
@ -2035,8 +2019,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
if (cfqq) {
cfq_log_cfqq(cfqd, cfqq, "set_active wl_prio:%d wl_type:%d",
cfqd->serving_prio, cfqd->serving_type);
cfq_blkiocg_update_avg_queue_size_stats(cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq);
cfqg_stats_update_avg_queue_size(cfqq->cfqg);
cfqq->slice_start = 0;
cfqq->dispatch_start = jiffies;
cfqq->allocated_slice = 0;
@ -2384,8 +2367,7 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
sl = cfqd->cfq_slice_idle;
mod_timer(&cfqd->idle_slice_timer, jiffies + sl);
cfq_blkiocg_update_set_idle_time_stats(cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq);
cfqg_stats_set_start_idle_time(cfqq->cfqg);
cfq_log_cfqq(cfqd, cfqq, "arm_idle: %lu group_idle: %d", sl,
group_idle ? 1 : 0);
}
@ -2408,9 +2390,7 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]++;
cfqq->nr_sectors += blk_rq_sectors(rq);
cfq_blkiocg_update_dispatch_stats(cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq, blk_rq_bytes(rq),
rq_data_dir(rq), rq_is_sync(rq));
cfqg_stats_update_dispatch(cfqq->cfqg, blk_rq_bytes(rq), rq->cmd_flags);
}
/*
@ -3513,9 +3493,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
cfq_clear_cfqq_wait_request(cfqq);
__blk_run_queue(cfqd->queue);
} else {
cfq_blkiocg_update_idle_time_stats(
cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq);
cfqg_stats_update_idle_time(cfqq->cfqg);
cfq_mark_cfqq_must_dispatch(cfqq);
}
}
@ -3542,10 +3520,8 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
rq_set_fifo_time(rq, jiffies + cfqd->cfq_fifo_expire[rq_is_sync(rq)]);
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
cfq_blkiocg_update_io_add_stats(cfqg_to_blkg(RQ_CFQG(rq)),
&blkio_policy_cfq,
cfqg_to_blkg(cfqd->serving_group),
rq_data_dir(rq), rq_is_sync(rq));
cfqg_stats_update_io_add(RQ_CFQG(rq), cfqd->serving_group,
rq->cmd_flags);
cfq_rq_enqueued(cfqd, cfqq, rq);
}
@ -3641,10 +3617,8 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfqd->rq_in_driver--;
cfqq->dispatched--;
(RQ_CFQG(rq))->dispatched--;
cfq_blkiocg_update_completion_stats(cfqg_to_blkg(cfqq->cfqg),
&blkio_policy_cfq, rq_start_time_ns(rq),
rq_io_start_time_ns(rq), rq_data_dir(rq),
rq_is_sync(rq));
cfqg_stats_update_completion(cfqq->cfqg, rq_start_time_ns(rq),
rq_io_start_time_ns(rq), rq->cmd_flags);
cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]--;
@ -4184,6 +4158,7 @@ static struct elevator_type iosched_cfq = {
static struct blkio_policy_type blkio_policy_cfq = {
.ops = {
.blkio_init_group_fn = cfq_init_blkio_group,
.blkio_reset_group_stats_fn = cfqg_stats_reset,
},
.plid = BLKIO_POLICY_PROP,
.pdata_size = sizeof(struct cfq_group),