Messages in this thread | | | Date | Tue, 25 Apr 2017 10:57:17 -0300 | From | Marcelo Tosatti <> | Subject | [patch 0/2] per-CPU vmstat thresholds and vmstat worker disablement |
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The per-CPU vmstat worker is a problem on -RT workloads (because ideally the CPU is entirely reserved for the -RT app, without interference). The worker transfers accumulated per-CPU vmstat counters to global counters.
To resolve the problem, create two tunables:
* Userspace configurable per-CPU vmstat threshold: by default the VM code calculates the size of the per-CPU vmstat arrays. This tunable allows userspace to configure the values.
* Userspace configurable per-CPU vmstat worker: allow disabling the per-CPU vmstat worker.
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