From: Xiubo Li <xiubli@xxxxxxxxxx> # cat /sys/kernel/debug/ceph/9a972bfc-68cb-4d52-a610-7cd9a9adbbdd.client52904/metrics item total avg_lat(us) min_lat(us) max_lat(us) stdev(us) ----------------------------------------------------------------------------------- read 21979 2093 765 248778 2771 write 1129 45184 30252 368629 20437 metadata 3 6462 1674 14260 6811 item total miss hit ------------------------------------------------- d_lease 2 0 1 caps 2 4 24248 Chnaged in V13: - [3/4] and [4/4] switch jiffies to ktime_t for the start/end time stamp, which will make it much preciser, such as when the IO latency(end - start) < 1ms and if the HZ==1000, then we will always get end == start in jiffies, and the min will always be 0, actually it should be in range (0, 1000)us. - [3/4] since by using ktime helpers we are calculating the stdev in nanosecond, then switch to us, so to compute the reminder make no sense any more, remove it from stdev. Changed in V12: - [3/4] and [4/4] switch atomic64_t type to u64 for lat sum and total numbers Changed in V11: - [3/4] and [4/4] fold the min/max/stdev factors Changed in V10: - rebase to the latest testing branch - merge all the metric related patches into one - [1/6] move metric helpers into a new file metric.c - [2/6] move metric helpers into metric.c - [3/6] merge the read/write patches into a signal patch and move metric helpers to metric.c - [4/6] move metric helpers to metric.c - [5/6] min/max latency support - [6/6] standard deviation support Changed in V9: - add an r_ended field to the mds request struct and use that to calculate the metric - fix some commit comments Xiubo Li (4): ceph: add dentry lease metric support ceph: add caps perf metric for each superblock ceph: add read/write latency metric support ceph: add metadata perf metric support fs/ceph/Makefile | 2 +- fs/ceph/acl.c | 2 +- fs/ceph/addr.c | 20 ++++++ fs/ceph/caps.c | 19 ++++++ fs/ceph/debugfs.c | 100 +++++++++++++++++++++++++-- fs/ceph/dir.c | 17 ++++- fs/ceph/file.c | 30 ++++++++ fs/ceph/inode.c | 4 +- fs/ceph/mds_client.c | 23 ++++++- fs/ceph/mds_client.h | 7 ++ fs/ceph/metric.c | 148 ++++++++++++++++++++++++++++++++++++++++ fs/ceph/metric.h | 62 +++++++++++++++++ fs/ceph/super.h | 9 ++- fs/ceph/xattr.c | 4 +- include/linux/ceph/osd_client.h | 3 + net/ceph/osd_client.c | 3 + 16 files changed, 436 insertions(+), 17 deletions(-) create mode 100644 fs/ceph/metric.c create mode 100644 fs/ceph/metric.h -- 1.8.3.1
