v2
- rename to_ceph_timespec() to ktime_to_ceph_timespec()
- use ceph_encode_timespec64() helper
Jeff,
To apply these, please drop commit range f4bf256..840d9f0 from testing branch.
Right now, cumulative read/write/metadata latencies are tracked
and are periodically forwarded to the MDS. These meterics are not
particularly useful. A much more useful metric is the average latency
and standard deviation (stdev) which is what this series of patches
aims to do.
The userspace (libcephfs+tool) changes are here::
https://github.com/ceph/ceph/pull/41397
Note that the cumulative latencies are still forwarded to the MDS but
the tool (cephfs-top) ignores it altogether.
Latency standard deviation is calculated in `cephfs-top` tool.
Venky Shankar (4):
ceph: use ktime_to_timespec64() rather than jiffies_to_timespec64()
ceph: track average r/w/m latency
ceph: include average/stdev r/w/m latency in mds metrics
ceph: use tracked average r/w/m latencies to display metrics in
debugfs
fs/ceph/debugfs.c | 5 ++--
fs/ceph/metric.c | 63 +++++++++++++++++++++++++++--------------------
fs/ceph/metric.h | 63 ++++++++++++++++++++++++++++++-----------------
3 files changed, 79 insertions(+), 52 deletions(-)
--
2.31.1
