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-rw-r--r--roles/tuned/templates/openshift-control-plane/tuned.conf25
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+#
+# tuned configuration
+#
+
+[main]
+summary=Optimize systems running OpenShift control plane
+include=openshift
+
+[sysctl]
+# ktune sysctl settings, maximizing i/o throughput
+#
+# Minimal preemption granularity for CPU-bound tasks:
+# (default: 1 msec# (1 + ilog(ncpus)), units: nanoseconds)
+kernel.sched_min_granularity_ns=10000000
+
+# The total time the scheduler will consider a migrated process
+# "cache hot" and thus less likely to be re-migrated
+# (system default is 500000, i.e. 0.5 ms)
+kernel.sched_migration_cost_ns=5000000
+
+# SCHED_OTHER wake-up granularity.
+#
+# Preemption granularity when tasks wake up. Lower the value to improve
+# wake-up latency and throughput for latency critical tasks.
+kernel.sched_wakeup_granularity_ns = 4000000