diff options
| -rw-r--r-- | fs/btrfs/fs.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.c | 8 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 18 |
3 files changed, 19 insertions, 9 deletions
diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h index 4394de12a767..b239e4b8421c 100644 --- a/fs/btrfs/fs.h +++ b/fs/btrfs/fs.h @@ -420,6 +420,8 @@ struct btrfs_commit_stats { u64 last_commit_dur; /* The total commit duration in ns */ u64 total_commit_dur; + /* Start of the last critical section in ns. */ + u64 critical_section_start_time; }; struct btrfs_fs_info { diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 5d93d9dd2c12..04715201c643 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -1138,13 +1138,21 @@ static ssize_t btrfs_commit_stats_show(struct kobject *kobj, struct kobj_attribute *a, char *buf) { struct btrfs_fs_info *fs_info = to_fs_info(kobj); + u64 now = ktime_get_ns(); + u64 start_time = fs_info->commit_stats.critical_section_start_time; + u64 pending = 0; + + if (start_time) + pending = now - start_time; return sysfs_emit(buf, "commits %llu\n" + "cur_commit_ms %llu\n" "last_commit_ms %llu\n" "max_commit_ms %llu\n" "total_commit_ms %llu\n", fs_info->commit_stats.commit_count, + div_u64(pending, NSEC_PER_MSEC), div_u64(fs_info->commit_stats.last_commit_dur, NSEC_PER_MSEC), div_u64(fs_info->commit_stats.max_commit_dur, NSEC_PER_MSEC), div_u64(fs_info->commit_stats.total_commit_dur, NSEC_PER_MSEC)); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index b96195d6480f..b518a6c3517b 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -2163,13 +2163,19 @@ static void add_pending_snapshot(struct btrfs_trans_handle *trans) list_add(&trans->pending_snapshot->list, &cur_trans->pending_snapshots); } -static void update_commit_stats(struct btrfs_fs_info *fs_info, ktime_t interval) +static void update_commit_stats(struct btrfs_fs_info *fs_info) { + ktime_t now = ktime_get_ns(); + ktime_t interval = now - fs_info->commit_stats.critical_section_start_time; + + ASSERT(fs_info->commit_stats.critical_section_start_time); + fs_info->commit_stats.commit_count++; fs_info->commit_stats.last_commit_dur = interval; fs_info->commit_stats.max_commit_dur = max_t(u64, fs_info->commit_stats.max_commit_dur, interval); fs_info->commit_stats.total_commit_dur += interval; + fs_info->commit_stats.critical_section_start_time = 0; } int btrfs_commit_transaction(struct btrfs_trans_handle *trans) @@ -2178,8 +2184,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans) struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_transaction *prev_trans = NULL; int ret; - ktime_t start_time; - ktime_t interval; ASSERT(refcount_read(&trans->use_count) == 1); btrfs_trans_state_lockdep_acquire(fs_info, BTRFS_LOCKDEP_TRANS_COMMIT_PREP); @@ -2312,8 +2316,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans) * Get the time spent on the work done by the commit thread and not * the time spent waiting on a previous commit */ - start_time = ktime_get_ns(); - + fs_info->commit_stats.critical_section_start_time = ktime_get_ns(); extwriter_counter_dec(cur_trans, trans->type); ret = btrfs_start_delalloc_flush(fs_info); @@ -2545,6 +2548,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans) if (ret) goto scrub_continue; + update_commit_stats(fs_info); /* * We needn't acquire the lock here because there is no other task * which can change it. @@ -2581,8 +2585,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans) trace_btrfs_transaction_commit(fs_info); - interval = ktime_get_ns() - start_time; - btrfs_scrub_continue(fs_info); if (current->journal_info == trans) @@ -2590,8 +2592,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans) kmem_cache_free(btrfs_trans_handle_cachep, trans); - update_commit_stats(fs_info, interval); - return ret; unlock_reloc: |