This patch adds per-device stats in debugfs, the examples
are as below:
mkfs.f2fs -f -c /dev/vdc /dev/vdb
mount /dev/vdb /mnt/f2fs/
cat /sys/kernel/debug/f2fs/status
Multidevice stats:
[seg: inuse dirty full free prefree]
#0 5 0 0 4007 0
#1 1 0 0 8191 0
mkfs.f2fs -f -s 2 -c /dev/vdc /dev/vdb
mount /dev/vdb /mnt/f2fs
cat /sys/kernel/debug/f2fs/status
Multidevice stats:
[seg: inuse dirty full free prefree] [sec: inuse
dirty full free prefree]
#0 5 0 0 4005 0 5
0 0 2000 0
#1 1 0 0 8191 0 1
0 0 4095 0
Signed-off-by: Chao Yu <c...@kernel.org>
---
fs/f2fs/debug.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++++
fs/f2fs/f2fs.h | 14 +++++++
2 files changed, 121 insertions(+)
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 546b8ba91261..278c8855ac0a 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -60,6 +60,70 @@ void f2fs_update_sit_info(struct f2fs_sb_info *sbi)
}
#ifdef CONFIG_DEBUG_FS
+static void update_multidevice_stats(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_stat_info *si = F2FS_STAT(sbi);
+ struct f2fs_dev_stats *dev_stats = si->dev_stats;
+ int i, j;
+
+ if (!f2fs_is_multi_device(sbi))
+ return;
+
+ memset(dev_stats, 0, sizeof(struct f2fs_dev_stats) * sbi->s_ndevs);
+ for (i = 0; i < sbi->s_ndevs; i++) {
+ unsigned int start_segno, end_segno;
+ block_t start_blk, end_blk;
+
+ if (i == 0) {
+ start_blk = MAIN_BLKADDR(sbi);
+ end_blk = FDEV(i).end_blk + 1 - SEG0_BLKADDR(sbi);
+ } else {
+ start_blk = FDEV(i).start_blk;
+ end_blk = FDEV(i).end_blk + 1;
+ }
+
+ start_segno = GET_SEGNO(sbi, start_blk);
+ end_segno = GET_SEGNO(sbi, end_blk);
+
+ for (j = start_segno; j < end_segno; j++) {
+ unsigned int seg_blks, sec_blks;
+
+ seg_blks = get_seg_entry(sbi, j)->valid_blocks;
+
+ /* update segment stats */
+ if (IS_CURSEG(sbi, j))
+ dev_stats[i].devstats[0][DEVSTAT_INUSE]++;
+ else if (seg_blks == BLKS_PER_SEG(sbi))
+ dev_stats[i].devstats[0][DEVSTAT_FULL]++;
+ else if (seg_blks != 0)
+ dev_stats[i].devstats[0][DEVSTAT_DIRTY]++;
+ else if (!test_bit(j, FREE_I(sbi)->free_segmap))
+ dev_stats[i].devstats[0][DEVSTAT_FREE]++;
+ else
+ dev_stats[i].devstats[0][DEVSTAT_PREFREE]++;
+
+ if (!__is_large_section(sbi) ||
+ (j % SEGS_PER_SEC(sbi)) != 0)
+ continue;
+
+ sec_blks = get_sec_entry(sbi, j)->valid_blocks;
+
+ /* update section stats */
+ if (IS_CURSEC(sbi, GET_SEC_FROM_SEG(sbi, j)))
+ dev_stats[i].devstats[1][DEVSTAT_INUSE]++;
+ else if (sec_blks == BLKS_PER_SEC(sbi))
+ dev_stats[i].devstats[1][DEVSTAT_FULL]++;
+ else if (sec_blks != 0)
+ dev_stats[i].devstats[1][DEVSTAT_DIRTY]++;
+ else if (!test_bit(GET_SEC_FROM_SEG(sbi, j),
+ FREE_I(sbi)->free_secmap))
+ dev_stats[i].devstats[1][DEVSTAT_FREE]++;
+ else
+ dev_stats[i].devstats[1][DEVSTAT_PREFREE]++;
+ }
+ }
+}
+
static void update_general_status(struct f2fs_sb_info *sbi)
{
struct f2fs_stat_info *si = F2FS_STAT(sbi);
@@ -214,6 +278,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->valid_blks[type] += blks;
}
+ update_multidevice_stats(sbi);
+
for (i = 0; i < MAX_CALL_TYPE; i++)
si->cp_call_count[i] = atomic_read(&sbi->cp_call_count[i]);
@@ -498,6 +564,36 @@ static int stat_show(struct seq_file *s, void *v)
si->dirty_count);
seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
si->prefree_count, si->free_segs, si->free_secs);
+ if (f2fs_is_multi_device(sbi)) {
+ seq_puts(s, "Multidevice stats:\n");
+ seq_printf(s, " [seg: %8s %8s %8s %8s %8s]",
+ "inuse", "dirty", "full", "free",
"prefree");
+ if (__is_large_section(sbi))
+ seq_printf(s, " [sec: %8s %8s %8s %8s %8s]\n",
+ "inuse", "dirty", "full", "free",
"prefree");
+ else
+ seq_puts(s, "\n");
+
+ for (i = 0; i < sbi->s_ndevs; i++) {
+ seq_printf(s, " #%-2d %8u %8u %8u %8u
%8u", i,
+
si->dev_stats[i].devstats[0][DEVSTAT_INUSE],
+
si->dev_stats[i].devstats[0][DEVSTAT_DIRTY],
+
si->dev_stats[i].devstats[0][DEVSTAT_FULL],
+
si->dev_stats[i].devstats[0][DEVSTAT_FREE],
+
si->dev_stats[i].devstats[0][DEVSTAT_PREFREE]);
+ if (!__is_large_section(sbi)) {
+ seq_puts(s, "\n");
+ continue;
+ }
+ seq_printf(s, " %8u %8u %8u %8u %8u\n",
+
si->dev_stats[i].devstats[1][DEVSTAT_INUSE],
+
si->dev_stats[i].devstats[1][DEVSTAT_DIRTY],
+
si->dev_stats[i].devstats[1][DEVSTAT_FULL],
+
si->dev_stats[i].devstats[1][DEVSTAT_FREE],
+
si->dev_stats[i].devstats[1][DEVSTAT_PREFREE]);
+ }
+ seq_puts(s, "\n");
+ }
seq_printf(s, "CP calls: %d (BG: %d)\n",
si->cp_call_count[TOTAL_CALL],
si->cp_call_count[BACKGROUND]);
@@ -665,6 +761,7 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
struct f2fs_stat_info *si;
+ struct f2fs_dev_stats *dev_stats;
unsigned long flags;
int i;
@@ -672,6 +769,15 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi)
if (!si)
return -ENOMEM;
+ dev_stats = f2fs_kzalloc(sbi, sizeof(struct f2fs_dev_stats) *
+ sbi->s_ndevs, GFP_KERNEL);
+ if (!dev_stats) {
+ kfree(si);
+ return -ENOMEM;
+ }
+
+ si->dev_stats = dev_stats;
+
si->all_area_segs = le32_to_cpu(raw_super->segment_count);
si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
@@ -724,6 +830,7 @@ void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
list_del(&si->stat_list);
raw_spin_unlock_irqrestore(&f2fs_stat_lock, flags);
+ kfree(si->dev_stats);
kfree(si);
}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index bda61d7ca8dd..56797f8e6659 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3942,6 +3942,19 @@ void f2fs_destroy_recovery_cache(void);
* debug.c
*/
#ifdef CONFIG_F2FS_STAT_FS
+enum {
+ DEVSTAT_INUSE,
+ DEVSTAT_DIRTY,
+ DEVSTAT_FULL,
+ DEVSTAT_FREE,
+ DEVSTAT_PREFREE,
+ DEVSTAT_MAX,
+};
+
+struct f2fs_dev_stats {
+ unsigned int devstats[2][DEVSTAT_MAX]; /* 0: segs, 1: secs */
+};
+
struct f2fs_stat_info {
struct list_head stat_list;
struct f2fs_sb_info *sbi;
@@ -4005,6 +4018,7 @@ struct f2fs_stat_info {
unsigned int block_count[2];
unsigned int inplace_count;
unsigned long long base_mem, cache_mem, page_mem;
+ struct f2fs_dev_stats *dev_stats;
};
static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
--
2.40.1
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