From: Xiubo Li <xiubli@xxxxxxxxxx> Sometimes we need to discard the old perf metrics and start to get new ones. And this will reset the most metric counters, except the total numbers for caps and dentries. URL: https://tracker.ceph.com/issues/43215 Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx> --- fs/ceph/debugfs.c | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-) diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index 60f3e307fca1..6e595a37af5d 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -179,6 +179,43 @@ static int metric_show(struct seq_file *s, void *p) return 0; } +static ssize_t metric_store(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct ceph_fs_client *fsc = s->private; + struct ceph_mds_client *mdsc = fsc->mdsc; + struct ceph_client_metric *metric = &mdsc->metric; + char buf[8]; + + if (copy_from_user(buf, user_buf, 8)) + return -EFAULT; + + if (strncmp(buf, "reset", strlen("reset"))) { + pr_err("Invalid set value '%s', only 'reset' is valid\n", buf); + return -EINVAL; + } + + percpu_counter_set(&metric->d_lease_hit, 0); + percpu_counter_set(&metric->d_lease_mis, 0); + + percpu_counter_set(&metric->i_caps_hit, 0); + percpu_counter_set(&metric->i_caps_mis, 0); + + percpu_counter_set(&metric->read_latency_sum, 0); + percpu_counter_set(&metric->total_reads, 0); + + percpu_counter_set(&metric->write_latency_sum, 0); + percpu_counter_set(&metric->total_writes, 0); + + percpu_counter_set(&metric->metadata_latency_sum, 0); + percpu_counter_set(&metric->total_metadatas, 0); + + return count; +} + +CEPH_DEFINE_RW_FUNC(metric); + static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p) { struct seq_file *s = p; @@ -277,7 +314,6 @@ DEFINE_SHOW_ATTRIBUTE(mdsmap); DEFINE_SHOW_ATTRIBUTE(mdsc); DEFINE_SHOW_ATTRIBUTE(caps); DEFINE_SHOW_ATTRIBUTE(mds_sessions); -DEFINE_SHOW_ATTRIBUTE(metric); /* -- 2.21.0
