diff options
| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2021-04-01 10:21:25 -0700 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2021-04-09 11:34:59 -0400 |
| commit | a6c75eaf11032f4a3d2b3ce2265a194ac6e4a7f0 (patch) | |
| tree | 5cf7e6a63991a81a48d67745e1ac265add8e7b94 /fs/ext4/ext4.h | |
| parent | b237e3044450fcabc6d63d8578b2fbc8237caba3 (diff) | |
ext4: add mballoc stats proc file
Add new stats for measuring the performance of mballoc. This patch is
forked from Artem Blagodarenko's work that can be found here:
https://github.com/lustre/lustre-release/blob/master/ldiskfs/kernel_patches/patches/rhel8/ext4-simple-blockalloc.patch
This patch reorganizes the stats by cr level. This is how the output
looks like:
mballoc:
reqs: 0
success: 0
groups_scanned: 0
cr0_stats:
hits: 0
groups_considered: 0
useless_loops: 0
bad_suggestions: 0
cr1_stats:
hits: 0
groups_considered: 0
useless_loops: 0
bad_suggestions: 0
cr2_stats:
hits: 0
groups_considered: 0
useless_loops: 0
cr3_stats:
hits: 0
groups_considered: 0
useless_loops: 0
extents_scanned: 0
goal_hits: 0
2^n_hits: 0
breaks: 0
lost: 0
buddies_generated: 0/40
buddies_time_used: 0
preallocated: 0
discarded: 0
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Ritesh Harjani <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20210401172129.189766-4-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 7ba90a9fd53a..67a675d222f2 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1550,9 +1550,13 @@ struct ext4_sb_info { atomic_t s_bal_success; /* we found long enough chunks */ atomic_t s_bal_allocated; /* in blocks */ atomic_t s_bal_ex_scanned; /* total extents scanned */ + atomic_t s_bal_groups_scanned; /* number of groups scanned */ atomic_t s_bal_goals; /* goal hits */ atomic_t s_bal_breaks; /* too long searches */ atomic_t s_bal_2orders; /* 2^order hits */ + atomic64_t s_bal_cX_groups_considered[4]; + atomic64_t s_bal_cX_hits[4]; + atomic64_t s_bal_cX_failed[4]; /* cX loop didn't find blocks */ atomic_t s_mb_buddies_generated; /* number of buddies generated */ atomic64_t s_mb_generation_time; atomic_t s_mb_lost_chunks; @@ -2856,6 +2860,7 @@ int __init ext4_fc_init_dentry_cache(void); extern const struct seq_operations ext4_mb_seq_groups_ops; extern long ext4_mb_stats; extern long ext4_mb_max_to_scan; +extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset); extern int ext4_mb_init(struct super_block *); extern int ext4_mb_release(struct super_block *); extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, |