From: Theodore Ts'o Date: Wed, 17 Dec 2008 05:20:45 +0000 (-0500) Subject: ext4: display average commit time X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d7cfa4684d82f58e5d7cb73b8a3c88c169937f25;p=linux-beck.git 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" --- diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index e70d657a19f8..74d87290381c 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -40,6 +40,7 @@ #include #include +#include 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",