[Kernel-packages] [Bug 2021571] Re: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete

2023-09-29 Thread Kevin Brierly
It examines the blkio device tree and sums data as far as i know. Removed devices do not get deleted from the blkio statistics tree and are just marked as offline somehow. In our case racadm lclog created and destroyed usb devices to pull data and the blkio tree reached over 65000 leafs. It takes

[Kernel-packages] [Bug 2021571] Re: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete

2023-09-19 Thread Kevin Brierly
the hardware does not seem to be relevant. Do you have anything calling "racadm lclog" on fairly regular basis? it creates and destroys a usb device over and over. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta in Ubuntu.

[Kernel-packages] [Bug 2021571] Re: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete

2023-09-15 Thread Kevin Brierly
Do you have a lot of blkio devices coming and going? For example iscsi/usb/etc. We currently believe it's tree bloat due to added/removed devices. We are still digging into the issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 2021571] Re: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete

2023-09-13 Thread Kevin Brierly
yes. just confirms it takes a while. ** Attachment added: "flame2.html" https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/2021571/+attachment/5700645/+files/flame2.html -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 2021571] Re: cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to complete

2023-09-12 Thread Kevin Brierly
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