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f2fs: show issued flush/discard count 

Show historical count of flush command and discard command.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-03-25 17:19:58 +08:00 committed by Jaegeuk Kim
parent c13ff37e35
commit 8b8dd65f72
3 changed files with 46 additions and 26 deletions
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24
fs/f2fs/debug.c
View File

@ -56,12 +56,18 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->max_vw_cnt = atomic_read(&sbi->max_vw_cnt);
si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
if (SM_I(sbi) && SM_I(sbi)->fcc_info)
si->nr_flush =
atomic_read(&SM_I(sbi)->fcc_info->submit_flush);
if (SM_I(sbi) && SM_I(sbi)->dcc_info)
si->nr_discard =
atomic_read(&SM_I(sbi)->dcc_info->submit_discard);
if (SM_I(sbi) && SM_I(sbi)->fcc_info) {
si->nr_flushed =
atomic_read(&SM_I(sbi)->fcc_info->issued_flush);
si->nr_flushing =
atomic_read(&SM_I(sbi)->fcc_info->issing_flush);
}
if (SM_I(sbi) && SM_I(sbi)->dcc_info) {
si->nr_discarded =
atomic_read(&SM_I(sbi)->dcc_info->issued_discard);
si->nr_discarding =
atomic_read(&SM_I(sbi)->dcc_info->issing_discard);
}
si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
si->rsvd_segs = reserved_segments(sbi);
si->overp_segs = overprovision_segments(sbi);
@ -336,9 +342,11 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
si->ext_tree, si->zombie_tree, si->ext_node);
seq_puts(s, "\nBalancing F2FS Async:\n");
seq_printf(s, " - IO (CP: %4d, Data: %4d, Flush: %4d, Discard: %4d)\n",
seq_printf(s, " - IO (CP: %4d, Data: %4d, Flush: (%4d %4d), "
"Discard: (%4d %4d))\n",
si->nr_wb_cp_data, si->nr_wb_data,
si->nr_flush, si->nr_discard);
si->nr_flushing, si->nr_flushed,
si->nr_discarding, si->nr_discarded);
seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), "
"volatile IO: %4d (Max. %4d)\n",
si->inmem_pages, si->aw_cnt, si->max_aw_cnt,

9
fs/f2fs/f2fs.h
View File

@ -214,7 +214,8 @@ struct discard_cmd_control {
wait_queue_head_t discard_wait_queue; /* waiting queue for wake-up */
struct mutex cmd_lock;
int max_discards; /* max. discards to be issued */
atomic_t submit_discard; /* # of issued discard */
atomic_t issued_discard; /* # of issued discard */
atomic_t issing_discard; /* # of issing discard */
};
/* for the list of fsync inodes, used only during recovery */
@ -643,7 +644,8 @@ struct flush_cmd {
struct flush_cmd_control {
struct task_struct *f2fs_issue_flush; /* flush thread */
wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
atomic_t submit_flush; /* # of issued flushes */
atomic_t issued_flush; /* # of issued flushes */
atomic_t issing_flush; /* # of issing flushes */
struct llist_head issue_list; /* list for command issue */
struct llist_node *dispatch_list; /* list for command dispatch */
};
@ -2329,7 +2331,8 @@ struct f2fs_stat_info {
unsigned int ndirty_dirs, ndirty_files, ndirty_all;
int nats, dirty_nats, sits, dirty_sits, free_nids, alloc_nids;
int total_count, utilization;
int bg_gc, nr_wb_cp_data, nr_wb_data, nr_flush, nr_discard;
int bg_gc, nr_wb_cp_data, nr_wb_data;
int nr_flushing, nr_flushed, nr_discarding, nr_discarded;
int inline_xattr, inline_inode, inline_dir, append, update, orphans;
int aw_cnt, max_aw_cnt, vw_cnt, max_vw_cnt;
unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;

39
fs/f2fs/segment.c
View File

@ -490,6 +490,8 @@ repeat:
fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
ret = submit_flush_wait(sbi);
atomic_inc(&fcc->issued_flush);
llist_for_each_entry_safe(cmd, next,
fcc->dispatch_list, llnode) {
cmd->ret = ret;
@ -507,25 +509,29 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi)
{
struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
struct flush_cmd cmd;
int ret;
if (test_opt(sbi, NOBARRIER))
return 0;
if (!test_opt(sbi, FLUSH_MERGE))
return submit_flush_wait(sbi);
if (!atomic_read(&fcc->submit_flush)) {
int ret;
atomic_inc(&fcc->submit_flush);
if (!test_opt(sbi, FLUSH_MERGE)) {
ret = submit_flush_wait(sbi);
atomic_dec(&fcc->submit_flush);
atomic_inc(&fcc->issued_flush);
return ret;
}
if (!atomic_read(&fcc->issing_flush)) {
atomic_inc(&fcc->issing_flush);
ret = submit_flush_wait(sbi);
atomic_dec(&fcc->issing_flush);
atomic_inc(&fcc->issued_flush);
return ret;
}
init_completion(&cmd.wait);
atomic_inc(&fcc->submit_flush);
atomic_inc(&fcc->issing_flush);
llist_add(&cmd.llnode, &fcc->issue_list);
if (!fcc->dispatch_list)
@ -533,10 +539,10 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi)
if (fcc->f2fs_issue_flush) {
wait_for_completion(&cmd.wait);
atomic_dec(&fcc->submit_flush);
atomic_dec(&fcc->issing_flush);
} else {
llist_del_all(&fcc->issue_list);
atomic_set(&fcc->submit_flush, 0);
atomic_set(&fcc->issing_flush, 0);
}
return cmd.ret;
@ -556,7 +562,8 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi)
fcc = kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
if (!fcc)
return -ENOMEM;
atomic_set(&fcc->submit_flush, 0);
atomic_set(&fcc->issued_flush, 0);
atomic_set(&fcc->issing_flush, 0);
init_waitqueue_head(&fcc->flush_wait_queue);
init_llist_head(&fcc->issue_list);
SM_I(sbi)->fcc_info = fcc;
@ -691,7 +698,7 @@ static void __add_discard_cmd(struct f2fs_sb_info *sbi,
static void __remove_discard_cmd(struct f2fs_sb_info *sbi, struct discard_cmd *dc)
{
if (dc->state == D_DONE)
atomic_dec(&(SM_I(sbi)->dcc_info->submit_discard));
atomic_dec(&(SM_I(sbi)->dcc_info->issing_discard));
if (dc->error == -EOPNOTSUPP)
dc->error = 0;
@ -730,7 +737,8 @@ static void __submit_discard_cmd(struct f2fs_sb_info *sbi,
if (!dc->error) {
/* should keep before submission to avoid D_DONE right away */
dc->state = D_SUBMIT;
atomic_inc(&dcc->submit_discard);
atomic_inc(&dcc->issued_discard);
atomic_inc(&dcc->issing_discard);
if (bio) {
bio->bi_private = dc;
bio->bi_end_io = f2fs_submit_discard_endio;
@ -1135,7 +1143,8 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
INIT_LIST_HEAD(&dcc->discard_entry_list);
INIT_LIST_HEAD(&dcc->discard_cmd_list);
mutex_init(&dcc->cmd_lock);
atomic_set(&dcc->submit_discard, 0);
atomic_set(&dcc->issued_discard, 0);
atomic_set(&dcc->issing_discard, 0);
dcc->nr_discards = 0;
dcc->max_discards = 0;