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ceph: add metadata perf metric support

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Add a new "r_ended" field to struct ceph_mds_request and use that to
maintain the average latency of MDS requests.

URL: https://tracker.ceph.com/issues/43215
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Xiubo Li
2020-03-19 23:45:02 -04:00
committed by Ilya Dryomov
parent 97e27aaa9a
commit 70c948206f
5 changed files with 53 additions and 0 deletions
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10
fs/ceph/debugfs.c
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@@ -171,6 +171,16 @@ static int metric_show(struct seq_file *s, void *p)
spin_unlock(&m->write_latency_lock);
CEPH_METRIC_SHOW("write", total, avg, min, max, sq);
spin_lock(&m->metadata_latency_lock);
total = m->total_metadatas;
sum = m->metadata_latency_sum;
avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
min = m->metadata_latency_min;
max = m->metadata_latency_max;
sq = m->metadata_latency_sq_sum;
spin_unlock(&m->metadata_latency_lock);
CEPH_METRIC_SHOW("metadata", total, avg, min, max, sq);
seq_printf(s, "\n");
seq_printf(s, "item total miss hit\n");
seq_printf(s, "-------------------------------------------------\n");