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| author | Theodore Ts'o <tytso@mit.edu> | 2008-12-17 00:20:45 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-12-17 00:20:45 -0500 |
| commit | d7cfa4684d82f58e5d7cb73b8a3c88c169937f25 (patch) | |
| tree | 1a47a0b3f6a9964c965e590fb3c438c8916bc357 | |
| parent | e07f7183a486cf9783d1f8c9d2997b5b39eeb2d4 (diff) | |
| download | op-kernel-dev-d7cfa4684d82f58e5d7cb73b8a3c88c169937f25.zip op-kernel-dev-d7cfa4684d82f58e5d7cb73b8a3c88c169937f25.tar.gz | |
ext4: display average commit time
Display the average commit time (which is used by the ext4 fsync
batching patch) in /proc/fs/jbd2/*/info for performance tuning
purposes.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/jbd2/journal.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index e70d657..74d8729 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -40,6 +40,7 @@ #include <asm/uaccess.h> #include <asm/page.h> +#include <asm/div64.h> EXPORT_SYMBOL(jbd2_journal_start); EXPORT_SYMBOL(jbd2_journal_restart); @@ -824,6 +825,8 @@ static int jbd2_seq_info_show(struct seq_file *seq, void *v) jiffies_to_msecs(s->stats->u.run.rs_flushing / s->stats->ts_tid)); seq_printf(seq, " %ums logging transaction\n", jiffies_to_msecs(s->stats->u.run.rs_logging / s->stats->ts_tid)); + seq_printf(seq, " %luus average transaction commit time\n", + do_div(s->journal->j_average_commit_time, 1000)); seq_printf(seq, " %lu handles per transaction\n", s->stats->u.run.rs_handle_count / s->stats->ts_tid); seq_printf(seq, " %lu blocks per transaction\n", |
