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4 Commits

Author SHA1 Message Date
Tejun Heo
7c1ee704a1 iocost_monitor: Report debt 
Report debt and rename del_ms row to delay for consistency.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2019-09-10 12:31:39 -06:00
Tejun Heo
b06f2d35c6 iocost_monitor: Report more info with higher accuracy 
When outputting json:

* Don't truncate numbers.

* Report address of iocg to ease drilling down further.

When outputting table:

* Use math.ceil() for delay_ms so that small delays don't read as 0.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2019-09-10 12:31:39 -06:00
Tejun Heo
e742bd5cb5 iocost_monitor: Always use strings for json values 
Json has limited accuracy for numbers and can silently truncate 64bit
values, which can be extremely confusing.  Let's consistently use
string encapsulated values for json output.

While at it, convert an unnecesary f-string to str().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2019-09-10 12:31:39 -06:00
Tejun Heo
6954ff185e blkcg: add tools/cgroup/iocost_monitor.py 
Instead of mucking with debugfs and ->pd_stat(), add drgn based
monitoring script.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2019-08-28 21:17:14 -06:00