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Scrape CPU latency stats from /proc/schedstat (#1389)

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These are useful as a direct indication of CPU contention and task
scheduler latency.

Handy references:
 - https://github.com/torvalds/linux/blob/master/Documentation/scheduler/sched-stats.txt
 - https://doc.opensuse.org/documentation/leap/tuning/html/book.sle.tuning/cha.tuning.taskscheduler.html

procfs is updated to pull in the enabling change:
https://github.com/prometheus/procfs/pull/186

Signed-off-by: Phil Frost <phil@postmates.com>
This commit is contained in:
Phil Frost 2019-07-10 03:16:24 -04:00 • committed by Ben Kochie
commit f693a71c06
13 changed files with 297 additions and 5 deletions
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2
vendor/modules.txt vendored
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@ -45,7 +45,7 @@ github.com/prometheus/common/version
github.com/prometheus/common/expfmt
github.com/prometheus/common/model
github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg
# github.com/prometheus/procfs v0.0.4-0.20190627154503-39e1aff1547e
# github.com/prometheus/procfs v0.0.4-0.20190702183519-8f55e607908e
github.com/prometheus/procfs
github.com/prometheus/procfs/bcache
github.com/prometheus/procfs/nfs