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bcachefs: bch2_time_stats_reset()

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-08-19 15:33:38 -04:00
parent b36f679c99
commit fdbc9c390a
3 changed files with 24 additions and 2 deletions
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9
fs/bcachefs/sysfs.c
View File

@ -233,7 +233,7 @@ write_attribute(perf_test);
#define x(_name) \
static struct attribute sysfs_time_stat_##_name = \
{ .name = #_name, .mode = 0444 };
{ .name = #_name, .mode = 0644 };
BCH_TIME_STATS()
#undef x
@ -722,6 +722,13 @@ SHOW(bch2_fs_time_stats)
STORE(bch2_fs_time_stats)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
#define x(name) \
if (attr == &sysfs_time_stat_##name) \
bch2_time_stats_reset(&c->times[BCH_TIME_##name]);
BCH_TIME_STATS()
#undef x
return size;
}
SYSFS_OPS(bch2_fs_time_stats);

14
fs/bcachefs/time_stats.c
View File

@ -151,6 +151,20 @@ void __bch2_time_stats_update(struct bch2_time_stats *stats, u64 start, u64 end)
}
}
void bch2_time_stats_reset(struct bch2_time_stats *stats)
{
spin_lock_irq(&stats->lock);
unsigned offset = offsetof(struct bch2_time_stats, min_duration);
memset((void *) stats + offset, 0, sizeof(*stats) - offset);
if (stats->buffer) {
int cpu;
for_each_possible_cpu(cpu)
per_cpu_ptr(stats->buffer, cpu)->nr = 0;
}
spin_unlock_irq(&stats->lock);
}
void bch2_time_stats_exit(struct bch2_time_stats *stats)
{
free_percpu(stats->buffer);

3
fs/bcachefs/time_stats.h
View File

@ -70,6 +70,7 @@ struct time_stat_buffer {
struct bch2_time_stats {
spinlock_t lock;
bool have_quantiles;
struct time_stat_buffer __percpu *buffer;
/* all fields are in nanoseconds */
u64 min_duration;
u64 max_duration;
@ -87,7 +88,6 @@ struct bch2_time_stats {
struct mean_and_variance_weighted duration_stats_weighted;
struct mean_and_variance_weighted freq_stats_weighted;
struct time_stat_buffer __percpu *buffer;
};
struct bch2_time_stats_quantiles {
@ -142,6 +142,7 @@ static inline bool track_event_change(struct bch2_time_stats *stats, bool v)
return false;
}
void bch2_time_stats_reset(struct bch2_time_stats *);
void bch2_time_stats_exit(struct bch2_time_stats *);
void bch2_time_stats_init(struct bch2_time_stats *);