Was the cause of this ever determined? I am seeing something similar on some of my systems. Times are usually around 1s, sometimes slightly higher.
# uname -r 4.15.0-193-generic # time cat /sys/fs/cgroup/blkio/blkio.time_recursive 8:144 69349171178307 8:128 4718621058 8:112 4604996397 8:96 4625378704 8:80 4873085108 8:64 3777190161 8:48 4749702443 8:32 8346248400 8:16 9260262419 8:0 154939957376379 real 0m1.03s user 0m0.00s sys 0m1.03s -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta in Ubuntu. https://bugs.launchpad.net/bugs/2021571 Title: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete Status in linux-meta package in Ubuntu: Confirmed Bug description: Issue: ```console # time cat /sys/fs/cgroup/blkio/blkio.time_recursive 8:16 354721435 real 0m1.297s user 0m0.000s sys 0m1.297s ``` As could be seen from above result, cat blkio took about 1 second to complete which is much longer than a normal case. Kernel Version: Linux compute08 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Would be appreciated to know any operations to identify the issue, Thank you very much for the help. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/2021571/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
