Name
migration_cost — Override the default scheduler migrations costs.
Synopsis
migration_cost=
level-1-useconds[level-2-useconds...]
This is a debugging option that overrides the default
scheduler migration cost matrix. The numbers specified by
level-N-useconds are indexed by the "CPU
domain distance" and are measured in microseconds.
An example of this option is migration_cost=1000,2000,3000 for a SMT
NUMA machine. It sets up an intra-core migration cost of 1 ms,
another inter-core migration cost of 2 ms, and another internode
migration cost of 3 ms.
Warning
Incorrect values can severely degrade scheduler performance, so this option should be used only for scheduler development, never for production environments.
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