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-rw-r--r--drivers/md/bcache/Kconfig1
-rw-r--r--drivers/md/bcache/bcache.h1
-rw-r--r--drivers/md/bcache/bset.c8
-rw-r--r--drivers/md/bcache/bset.h1
-rw-r--r--drivers/md/bcache/btree.c12
-rw-r--r--drivers/md/bcache/super.c3
-rw-r--r--drivers/md/bcache/sysfs.c43
-rw-r--r--drivers/md/bcache/util.c30
-rw-r--r--drivers/md/bcache/util.h57
9 files changed, 47 insertions, 109 deletions
diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig
index 529c9d04e9a4..8d165052e508 100644
--- a/drivers/md/bcache/Kconfig
+++ b/drivers/md/bcache/Kconfig
@@ -4,6 +4,7 @@ config BCACHE
tristate "Block device as cache"
select BLOCK_HOLDER_DEPRECATED if SYSFS
select CRC64
+ select TIME_STATS
help
Allows a block device to be used as cache for other devices; uses
a btree for indexing and the layout is optimized for SSDs.
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index aebb7ef10e63..75070b5e4779 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -185,6 +185,7 @@
#include <linux/rbtree.h>
#include <linux/rwsem.h>
#include <linux/refcount.h>
+#include <linux/time_stats.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/kthread.h>
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 2bba4d6aaaa2..03358d200709 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -1251,7 +1251,7 @@ static void __btree_sort(struct btree_keys *b, struct btree_iter *iter,
order = state->page_order;
}
- start_time = local_clock();
+ start_time = ktime_get_ns();
btree_mergesort(b, out, iter, fixup, false);
b->nsets = start;
@@ -1286,7 +1286,7 @@ static void __btree_sort(struct btree_keys *b, struct btree_iter *iter,
bch_bset_build_written_tree(b);
if (!start)
- bch_time_stats_update(&state->time, start_time);
+ time_stats_update(&state->time, start_time);
}
void bch_btree_sort_partial(struct btree_keys *b, unsigned int start,
@@ -1322,14 +1322,14 @@ void bch_btree_sort_and_fix_extents(struct btree_keys *b,
void bch_btree_sort_into(struct btree_keys *b, struct btree_keys *new,
struct bset_sort_state *state)
{
- uint64_t start_time = local_clock();
+ uint64_t start_time = ktime_get_ns();
struct btree_iter iter;
bch_btree_iter_init(b, &iter, NULL);
btree_mergesort(b, new->set->data, &iter, false, true);
- bch_time_stats_update(&state->time, start_time);
+ time_stats_update(&state->time, start_time);
new->set->size = 0; // XXX: why?
}
diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
index d795c84246b0..13e524ad7783 100644
--- a/drivers/md/bcache/bset.h
+++ b/drivers/md/bcache/bset.h
@@ -3,6 +3,7 @@
#define _BCACHE_BSET_H
#include <linux/kernel.h>
+#include <linux/time_stats.h>
#include <linux/types.h>
#include "bcache_ondisk.h"
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 147c493a989a..abf543bc7551 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -242,7 +242,7 @@ static void btree_node_read_endio(struct bio *bio)
static void bch_btree_node_read(struct btree *b)
{
- uint64_t start_time = local_clock();
+ uint64_t start_time = ktime_get_ns();
struct closure cl;
struct bio *bio;
@@ -270,7 +270,7 @@ static void bch_btree_node_read(struct btree *b)
goto err;
bch_btree_node_read_done(b);
- bch_time_stats_update(&b->c->btree_read_time, start_time);
+ time_stats_update(&b->c->btree_read_time, start_time);
return;
err:
@@ -1789,7 +1789,7 @@ static void bch_btree_gc(struct cache_set *c)
struct gc_stat stats;
struct closure writes;
struct btree_op op;
- uint64_t start_time = local_clock();
+ uint64_t start_time = ktime_get_ns();
trace_bcache_gc_start(c);
@@ -1815,7 +1815,7 @@ static void bch_btree_gc(struct cache_set *c)
bch_btree_gc_finish(c);
wake_up_allocators(c);
- bch_time_stats_update(&c->btree_gc_time, start_time);
+ time_stats_update(&c->btree_gc_time, start_time);
stats.key_bytes *= sizeof(uint64_t);
stats.data <<= 9;
@@ -2191,7 +2191,7 @@ static int btree_split(struct btree *b, struct btree_op *op,
{
bool split;
struct btree *n1, *n2 = NULL, *n3 = NULL;
- uint64_t start_time = local_clock();
+ uint64_t start_time = ktime_get_ns();
struct closure cl;
struct keylist parent_keys;
@@ -2297,7 +2297,7 @@ static int btree_split(struct btree *b, struct btree_op *op,
btree_node_free(b);
rw_unlock(true, n1);
- bch_time_stats_update(&b->c->btree_split_time, start_time);
+ time_stats_update(&b->c->btree_split_time, start_time);
return 0;
err_free2:
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index ba3909bb6bea..26c8fa93b55d 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1691,6 +1691,9 @@ static void cache_set_free(struct closure *cl)
kobject_put(&ca->kobj);
}
+ time_stats_exit(&c->btree_gc_time);
+ time_stats_exit(&c->btree_split_time);
+ time_stats_exit(&c->sort.time);
if (c->moving_gc_wq)
destroy_workqueue(c->moving_gc_wq);
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index c6f677059214..01eec5877cd7 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -16,6 +16,7 @@
#include <linux/blkdev.h>
#include <linux/sort.h>
#include <linux/sched/clock.h>
+#include <linux/seq_buf.h>
extern bool bcache_is_reboot;
@@ -79,10 +80,10 @@ read_attribute(active_journal_entries);
read_attribute(backing_dev_name);
read_attribute(backing_dev_uuid);
-sysfs_time_stats_attribute(btree_gc, sec, ms);
-sysfs_time_stats_attribute(btree_split, sec, us);
-sysfs_time_stats_attribute(btree_sort, ms, us);
-sysfs_time_stats_attribute(btree_read, ms, us);
+read_attribute(btree_gc_time);
+read_attribute(btree_split_time);
+read_attribute(btree_sort_time);
+read_attribute(btree_read_time);
read_attribute(btree_nodes);
read_attribute(btree_used_percent);
@@ -731,6 +732,9 @@ static unsigned int bch_average_key_size(struct cache_set *c)
SHOW(__bch_cache_set)
{
struct cache_set *c = container_of(kobj, struct cache_set, kobj);
+ struct seq_buf s;
+
+ seq_buf_init(&s, buf, PAGE_SIZE);
sysfs_print(synchronous, CACHE_SYNC(&c->cache->sb));
sysfs_print(journal_delay_ms, c->journal_delay_ms);
@@ -743,10 +747,25 @@ SHOW(__bch_cache_set)
sysfs_print(btree_cache_max_chain, bch_cache_max_chain(c));
sysfs_print(cache_available_percent, 100 - c->gc_stats.in_use);
- sysfs_print_time_stats(&c->btree_gc_time, btree_gc, sec, ms);
- sysfs_print_time_stats(&c->btree_split_time, btree_split, sec, us);
- sysfs_print_time_stats(&c->sort.time, btree_sort, ms, us);
- sysfs_print_time_stats(&c->btree_read_time, btree_read, ms, us);
+ if (attr == &sysfs_btree_gc_time) {
+ time_stats_to_text(&s, &c->btree_gc_time);
+ return s.len;
+ }
+
+ if (attr == &sysfs_btree_split_time) {
+ time_stats_to_text(&s, &c->btree_split_time);
+ return s.len;
+ }
+
+ if (attr == &sysfs_btree_sort_time) {
+ time_stats_to_text(&s, &c->sort.time);
+ return s.len;
+ }
+
+ if (attr == &sysfs_btree_read_time) {
+ time_stats_to_text(&s, &c->btree_read_time);
+ return s.len;
+ }
sysfs_print(btree_used_percent, bch_btree_used(c));
sysfs_print(btree_nodes, c->gc_stats.nodes);
@@ -988,10 +1007,10 @@ KTYPE(bch_cache_set);
static struct attribute *bch_cache_set_internal_attrs[] = {
&sysfs_active_journal_entries,
- sysfs_time_stats_attribute_list(btree_gc, sec, ms)
- sysfs_time_stats_attribute_list(btree_split, sec, us)
- sysfs_time_stats_attribute_list(btree_sort, ms, us)
- sysfs_time_stats_attribute_list(btree_read, ms, us)
+ &sysfs_btree_gc_time,
+ &sysfs_btree_split_time,
+ &sysfs_btree_sort_time,
+ &sysfs_btree_read_time,
&sysfs_btree_nodes,
&sysfs_btree_used_percent,
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index ae380bc3992e..95282bf0f9a7 100644
--- a/drivers/md/bcache/util.c
+++ b/drivers/md/bcache/util.c
@@ -160,36 +160,6 @@ int bch_parse_uuid(const char *s, char *uuid)
return i;
}
-void bch_time_stats_update(struct time_stats *stats, uint64_t start_time)
-{
- uint64_t now, duration, last;
-
- spin_lock(&stats->lock);
-
- now = local_clock();
- duration = time_after64(now, start_time)
- ? now - start_time : 0;
- last = time_after64(now, stats->last)
- ? now - stats->last : 0;
-
- stats->max_duration = max(stats->max_duration, duration);
-
- if (stats->last) {
- ewma_add(stats->average_duration, duration, 8, 8);
-
- if (stats->average_frequency)
- ewma_add(stats->average_frequency, last, 8, 8);
- else
- stats->average_frequency = last << 8;
- } else {
- stats->average_duration = duration << 8;
- }
-
- stats->last = now ?: 1;
-
- spin_unlock(&stats->lock);
-}
-
/**
* bch_next_delay() - update ratelimiting statistics and calculate next delay
* @d: the struct bch_ratelimit to update
diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
index 6f3cb7c92130..1e1bdbae9593 100644
--- a/drivers/md/bcache/util.h
+++ b/drivers/md/bcache/util.h
@@ -345,68 +345,11 @@ ssize_t bch_hprint(char *buf, int64_t v);
bool bch_is_zero(const char *p, size_t n);
int bch_parse_uuid(const char *s, char *uuid);
-struct time_stats {
- spinlock_t lock;
- /*
- * all fields are in nanoseconds, averages are ewmas stored left shifted
- * by 8
- */
- uint64_t max_duration;
- uint64_t average_duration;
- uint64_t average_frequency;
- uint64_t last;
-};
-
-void bch_time_stats_update(struct time_stats *stats, uint64_t time);
-
static inline unsigned int local_clock_us(void)
{
return local_clock() >> 10;
}
-#define NSEC_PER_ns 1L
-#define NSEC_PER_us NSEC_PER_USEC
-#define NSEC_PER_ms NSEC_PER_MSEC
-#define NSEC_PER_sec NSEC_PER_SEC
-
-#define __print_time_stat(stats, name, stat, units) \
- sysfs_print(name ## _ ## stat ## _ ## units, \
- div_u64((stats)->stat >> 8, NSEC_PER_ ## units))
-
-#define sysfs_print_time_stats(stats, name, \
- frequency_units, \
- duration_units) \
-do { \
- __print_time_stat(stats, name, \
- average_frequency, frequency_units); \
- __print_time_stat(stats, name, \
- average_duration, duration_units); \
- sysfs_print(name ## _ ##max_duration ## _ ## duration_units, \
- div_u64((stats)->max_duration, \
- NSEC_PER_ ## duration_units)); \
- \
- sysfs_print(name ## _last_ ## frequency_units, (stats)->last \
- ? div_s64(local_clock() - (stats)->last, \
- NSEC_PER_ ## frequency_units) \
- : -1LL); \
-} while (0)
-
-#define sysfs_time_stats_attribute(name, \
- frequency_units, \
- duration_units) \
-read_attribute(name ## _average_frequency_ ## frequency_units); \
-read_attribute(name ## _average_duration_ ## duration_units); \
-read_attribute(name ## _max_duration_ ## duration_units); \
-read_attribute(name ## _last_ ## frequency_units)
-
-#define sysfs_time_stats_attribute_list(name, \
- frequency_units, \
- duration_units) \
-&sysfs_ ## name ## _average_frequency_ ## frequency_units, \
-&sysfs_ ## name ## _average_duration_ ## duration_units, \
-&sysfs_ ## name ## _max_duration_ ## duration_units, \
-&sysfs_ ## name ## _last_ ## frequency_units,
-
#define ewma_add(ewma, val, weight, factor) \
({ \
(ewma) *= (weight) - 1; \
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-21 08:36:04 +0000