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ceph: add caps perf metric for each superblock

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Count hits and misses in the caps cache. If the client has all of
the necessary caps when a task needs references, then it's counted
as a hit. Any other situation is a miss.

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 23:45:00 -04:00
committed by Ilya Dryomov
parent f9009efac4
commit 1af16d547f
9 changed files with 83 additions and 14 deletions
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26
fs/ceph/metric.c
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@@ -16,13 +16,29 @@ int ceph_metric_init(struct ceph_client_metric *m)
ret = percpu_counter_init(&m->d_lease_hit, 0, GFP_KERNEL);
if (ret)
return ret;
ret = percpu_counter_init(&m->d_lease_mis, 0, GFP_KERNEL);
if (ret) {
percpu_counter_destroy(&m->d_lease_hit);
return ret;
}
if (ret)
goto err_d_lease_mis;
ret = percpu_counter_init(&m->i_caps_hit, 0, GFP_KERNEL);
if (ret)
goto err_i_caps_hit;
ret = percpu_counter_init(&m->i_caps_mis, 0, GFP_KERNEL);
if (ret)
goto err_i_caps_mis;
return 0;
err_i_caps_mis:
percpu_counter_destroy(&m->i_caps_hit);
err_i_caps_hit:
percpu_counter_destroy(&m->d_lease_mis);
err_d_lease_mis:
percpu_counter_destroy(&m->d_lease_hit);
return ret;
}
void ceph_metric_destroy(struct ceph_client_metric *m)
@@ -30,6 +46,8 @@ void ceph_metric_destroy(struct ceph_client_metric *m)
if (!m)
return;
percpu_counter_destroy(&m->i_caps_mis);
percpu_counter_destroy(&m->i_caps_hit);
percpu_counter_destroy(&m->d_lease_mis);
percpu_counter_destroy(&m->d_lease_hit);
}