Hi Tejun, the following: $ cd linux/tools/cgroup $ sudo python3 iocost_monitor.py sda tells: The kernel does not have iocost enabled Yet: $ cat /sys/fs/cgroup/unified/io.cost.qos 8:0 enable=1 ctrl=user rpct=95.00 rlat=2500 wpct=95.00 wlat=5000 min=1.00 max=10000.00 $ cat /sys/block/sda/dev 8:0 If useful: $ cat io.cost.model 8:0 ctrl=user model=linear rbps=528156881 rseqiops=73442 rrandiops=72800 wbps=386453414 wseqiops=79718 wrandiops=73186 What am doing wrong? Thanks, Paolo
