Marc reported that "btrfs check --repair" runs much faster than "btrfs
check", which is quite weird.
This patch will add time elapsed for each major tree it checked, for
both original mode and lowmem mode, so we can have a clue what's going
wrong.
Reported-by: Marc MERLIN <marc@xxxxxxxxxxx>
Signed-off-by: Qu Wenruo <quwenruo.btrfs@xxxxxxx>
---
v2:
Add prefix for each time report, as error message may make the output
hard to understand. Suggested by Satoru.
---
cmds-check.c | 21 +++++++++++++++++++--
utils.h | 24 ++++++++++++++++++++++++
2 files changed, 43 insertions(+), 2 deletions(-)
diff --git a/cmds-check.c b/cmds-check.c
index 006edbde..f1074c73 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -5318,13 +5318,16 @@ static int do_check_fs_roots(struct btrfs_fs_info *fs_info,
struct cache_tree *root_cache)
{
int ret;
+ struct timer timer;
if (!ctx.progress_enabled)
fprintf(stderr, "checking fs roots\n");
+ start_timer(&timer);
if (check_mode == CHECK_MODE_LOWMEM)
ret = check_fs_roots_v2(fs_info);
else
ret = check_fs_roots(fs_info, root_cache);
+ printf("fs roots checked in %d seconds\n", stop_timer(&timer));
return ret;
}
@@ -11584,14 +11587,16 @@ out:
static int do_check_chunks_and_extents(struct btrfs_fs_info *fs_info)
{
int ret;
+ struct timer timer;
if (!ctx.progress_enabled)
fprintf(stderr, "checking extents\n");
+ start_timer(&timer);
if (check_mode == CHECK_MODE_LOWMEM)
ret = check_chunks_and_extents_v2(fs_info);
else
ret = check_chunks_and_extents(fs_info);
-
+ printf("extents checked in %d seconds\n", stop_timer(&timer));
return ret;
}
@@ -12772,6 +12777,7 @@ int cmd_check(int argc, char **argv)
int qgroups_repaired = 0;
unsigned ctree_flags = OPEN_CTREE_EXCLUSIVE;
int force = 0;
+ struct timer timer;
while(1) {
int c;
@@ -12953,8 +12959,11 @@ int cmd_check(int argc, char **argv)
if (repair)
ctree_flags |= OPEN_CTREE_PARTIAL;
+ printf("opening btrfs filesystem\n");
+ start_timer(&timer);
info = open_ctree_fs_info(argv[optind], bytenr, tree_root_bytenr,
chunk_root_bytenr, ctree_flags);
+ printf("btrfs filesystem opened in %d seconds\n", stop_timer(&timer));
if (!info) {
error("cannot open file system");
ret = -EIO;
@@ -13115,8 +13124,10 @@ int cmd_check(int argc, char **argv)
else
fprintf(stderr, "checking free space cache\n");
}
+ start_timer(&timer);
ret = check_space_cache(root);
err |= !!ret;
+ printf("free space cache (tree) checked in %d seconds\n", stop_timer(&timer));
if (ret) {
if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
error("errors found in free space tree");
@@ -13140,18 +13151,22 @@ int cmd_check(int argc, char **argv)
}
fprintf(stderr, "checking csums\n");
+ start_timer(&timer);
ret = check_csums(root);
err |= !!ret;
+ printf("csums tree checked in %d seconds\n", stop_timer(&timer));
if (ret) {
error("errors found in csum tree");
goto out;
}
- fprintf(stderr, "checking root refs\n");
/* For low memory mode, check_fs_roots_v2 handles root refs */
if (check_mode != CHECK_MODE_LOWMEM) {
+ fprintf(stderr, "checking root refs\n");
+ start_timer(&timer);
ret = check_root_refs(root, &root_cache);
err |= !!ret;
+ printf("root refs checked in %d seconds\n", stop_timer(&timer));
if (ret) {
error("errors found in root refs");
goto out;
@@ -13186,8 +13201,10 @@ int cmd_check(int argc, char **argv)
if (info->quota_enabled) {
fprintf(stderr, "checking quota groups\n");
+ start_timer(&timer);
ret = qgroup_verify_all(info);
err |= !!ret;
+ printf("quota groups checked in %d seconds\n", stop_timer(&timer));
if (ret) {
error("failed to check quota groups");
goto out;
diff --git a/utils.h b/utils.h
index d28a05a6..159487db 100644
--- a/utils.h
+++ b/utils.h
@@ -172,4 +172,28 @@ u64 rand_u64(void);
unsigned int rand_range(unsigned int upper);
void init_rand_seed(u64 seed);
+/* Utils to report time duration */
+struct timer {
+ time_t start;
+};
+
+static inline void start_timer(struct timer *t)
+{
+ time(&t->start);
+}
+
+/*
+ * Stop timer and return the time elapsed in int
+ *
+ * int should be large enough to "btrfs check" and avoid
+ * type converting.
+ */
+static inline int stop_timer(struct timer *t)
+{
+ time_t end;
+
+ time(&end);
+
+ return (int)(difftime(end, t->start));
+}
#endif
--
2.14.1
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