threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
28 lines
1.3 KiB
Plaintext
28 lines
1.3 KiB
Plaintext
Control Groupstats is inspired by the discussion at
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http://lkml.org/lkml/2007/4/11/187 and implements per cgroup statistics as
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suggested by Andrew Morton in http://lkml.org/lkml/2007/4/11/263.
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Per cgroup statistics infrastructure re-uses code from the taskstats
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interface. A new set of cgroup operations are registered with commands
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and attributes specific to cgroups. It should be very easy to
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extend per cgroup statistics, by adding members to the cgroupstats
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structure.
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The current model for cgroupstats is a pull, a push model (to post
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statistics on interesting events), should be very easy to add. Currently
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user space requests for statistics by passing the cgroup path.
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Statistics about the state of all the tasks in the cgroup is returned to
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user space.
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NOTE: We currently rely on delay accounting for extracting information
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about tasks blocked on I/O. If CONFIG_TASK_DELAY_ACCT is disabled, this
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information will not be available.
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To extract cgroup statistics a utility very similar to getdelays.c
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has been developed, the sample output of the utility is shown below
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~/balbir/cgroupstats # ./getdelays -C "/sys/fs/cgroup/a"
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sleeping 1, blocked 0, running 1, stopped 0, uninterruptible 0
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~/balbir/cgroupstats # ./getdelays -C "/sys/fs/cgroup"
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sleeping 155, blocked 0, running 1, stopped 0, uninterruptible 2
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